User manual METER SRL-49

Assstng the automaton ndustry snce 1986 User manual METER SRL-49 Frmware: v.5.21 or hgher Input type: 0/4-20 ma, 0/1-5V, 0/2-10V Multcolour bargraph Read the user's manual carefully before startng to use the unt or software. Producer reserves the rght to mplement changes wthout pror notce. 2013.06.03 SRL-49_INSSXEN_v.2.08.001

CONTENTS 1. BASIC REQUIREMENTS AND USER SAFETY...3 2. GENERAL CHARACTERISTICS...4 3. TECHNICAL DATA...4 4. DEVICE INSTALLATION...6 4.1. UNPACKING...6 4.2. ASSEMBLY...6 4.3. CONNECTION METHOD...9 4.4. MAINTENANCE...15 5. FRONT PANEL DRIPTION...15 6. PRINCIPLE OF OPERATION...16 6.1. MEASUREMENT MODE...16 6.2. DETECTION OF THE PEAK VALUES...17 6.3. CONTROL OF THE RELAY OUTPUTS...18 6.3.1. One threshold mode...19 6.3.2. Two thresholds mode...20 7. DEVICE PROGRAMMING...21 7.1. PROGRAMMING...21 7.2. PARAMETERS EDITION...22 7.2.1. Numerc parameters (dgt change mode)...22 7.2.2. Numerc parameters (slde change mode)...22 7.2.3. Swtch parameters ( LIST type)...23 7.3. DRIPTION...23 7.3.1. rel1 menu...24 7.3.2. beep menu...26 7.3.3. npt menu...26 7.3.4. OutP menu...31 7.3.5. bar menu...32 7.3.6. br parameter...34 7.3.7. HOLd menu...34 7.3.8. SECu menu...35 7.3.9. rs menu...35 7.3.10. Edt parameter...36 7.3.11. defs parameter...36 7.3.12. SErv menu...36 7.4. STRUCTURE...37 8. THE ALARM LED...39 9. OVER-CURRENT PROTECTION...39 10. DISPLAYED VALUES CALCULATION...39 10.1. ADDITIONAL CALCULATIONS (USED CONVERSION CHARACTERISTIC)...39 10.1.1. Lnear characterstc...40 10.1.2. Square characterstc...40 10.1.3. Square root characterstc...41 10.1.4. User defned characterstc...41 10.1.5. Volume characterstcs of a cylndrcal tank...42 10.2. EXAMPLES OF CALCULATIONS...43 11. THE MODBUS PROTOCOL HANDLING...48 11.1. LIST OF REGISTERS...48 11.2. TRANSMISSION ERRORS DRIPTION...53 11.3. EXAMPLES OF QUERY/ANSWER FRAMES...53 12. DEFAULT AND USER'S SETTINGS LIST...56 2

Explanaton of symbols used n the manual:! - Ths symbol denotes especally mportant gudelnes concernng the nstallaton and operaton of the devce. Not complyng wth the gudelnes denoted by ths symbol may cause an accdent, damage or equpment destructon. IF THE DEVICE IS NOT USED ACCORDING TO THE MANUAL THE USER IS RESPONSIBLE FOR POSSIBLE DAMAGES. - Ths symbol denotes especally mportant characterstcs of the unt. Read any nformaton regardng ths symbol carefully 1. BASIC REQUIREMENTS AND USER SAFETY! - The manufacturer s not responsble for any damages caused by napproprate nstallaton, not mantanng the proper envronmental condtons and usng the unt contrary to ts assgnment. - Installaton should be conducted by qualfed personnel. Durng nstallaton all avalable safety requrements should be consdered. The ftter s responsble for executng the nstallaton accordng to ths manual, local safety and EMC regulatons. - GND nput of devce should be connected to PE wre; - The unt must be properly set-up, accordng to the applcaton. Incorrect confguraton can cause defectve operaton, whch can lead to unt damage or an accdent. - If n the case of a unt malfuncton there s a rsk of a serous threat to the safety of people or property addtonal, ndependent systems and solutons to prevent such a threat must be used. - The unt uses dangerous voltage that can cause a lethal accdent. The unt must be swtched off and dsconnected from the power supply pror to startng nstallaton of troubleshootng (n the case of malfuncton). - Neghbourng and connected equpment must meet the approprate standards and regulatons concernng safety and be equpped wth adequate overvoltage and nterference flters. - Do not attempt to dsassemble, repar or modfy the unt yourself. The unt has no user servceable parts. Defectve unts must be dsconnected and submtted for repars at an authorzed servce centre.! - In order to mnmze fre or electrc shock hazard, the unt must be protected aganst atmospherc precptaton and excessve humdty. 3

!! - Do not use the unt n areas threatened wth excessve shocks, vbratons, dust, humdty, corrosve gasses and ols. - Do not use the unt n areas where there s rsk of explosons. - Do not use the unt n areas wth sgnfcant temperature varatons, exposure to condensaton or ce. - Do not use the unt n areas exposed to drect sunlght. - Make sure that the ambent temperature (e.g. nsde the control box) does not exceed the recommended values. In such cases forced coolng of the unt must be consdered (e.g. by usng a ventlator). The unt s desgned for operaton n an ndustral envronment and must not be used n a household envronment or smlar. 2. GENERAL CHARACTERISTICS The SRL-49 meter s equpped wth one current nput 0-20 / 4-20mA and one voltage nput 0-5 / 1-5 / 0-10 / 2-10V. Current nput has addtonally overcurrent protecton crcut, whch protects standard resstor. The selecton of actve nput s realsed by software, and selected nput can be changed at any tme. Addtonally the SRL-49 allows user to select a converson characterstc of several knds: lnear, square, square root, and user defned (max.20 ponts length). The measured value s dsplayed smultaneously on 4-dgt LED dsplay and 20-ponts, colour bargraph. Set relay thresholds can be dsplayed on bargraph together wth the measure. Dsplayed values range can be selected by user, from -999 to 9999, plus decmal pont. The devce can be equpped wth two or four relay (or OC type) outputs. Optonally SRL- 49 wth two relays outputs can be equpped wth actve current output. Devce SRL-49 s equpped wth RS-485 / Modbus RTU communcaton nterface and sensor supply output. The meter can be ordered n two power supply versons. SRL-49 can be used for controllng and regulaton of processes need proportonal and threshold control lke: temperature processes (heatng or coolng), valves controllng or other. 3. TECHNICAL DATA Power supply voltage (dependng on verson) External fuse (requred) Power consumpton 4 Current nput Current measurement accuracy 85...230...260V AC/DC; 50 60 Hz (separated) or 19...24...50V DC and 16...24...35V AC (separated) T - type, max. 2 A max. 4.5 VA @ 85 260V AC/DC max. 4.5 VA @ 16V 35V AC max. 4.5 W @ 19V 50V DC 0 20 ma, 4 20 ma overload protected, maxmum nput current about 40 ma Current nput resstance < 65 Ω (typcal 55 Ω) ± 0,1% @ 25 C; ± one dgt (for 0 20 ma range)

Voltage nput Voltage measurement accuracy Voltage nput resstance 0 5 V, 1 5 V, 0 10 V, 2 10 V ± 0,1% @ 25 C; ± one dgt (for 0 10 V range) > 50 kω Temperature stablty 50 ppm / C Dsplay range -999 9999, plus decmal pont Accepted prolonged nput overload: 20% Outputs relay: or OC-type: sensor power supply: actve current: 0, 2 or 4 NO, 1A/250V AC (cos ϕ = 1) 0, 2 or 4; 30mA / 30VDC / 100mW 24V +5%, -10% / max. 100 ma, stablzed range max. 0 24 ma, load resstance max.700 Ω (current output s optonal, for two relays verson only) Communcaton nterface Baud rate Dsplay Data memory RS 485, 8N1 and 8N2, Modbus RTU, not separated 1200 bt/s 115200 bt/s LED, 4 dgt, 9mm heght, red and 20-ponts bargraph, red-green non-volatle memory, EEPROM type Front panel protecton IP 65 optonal verson wth panel cut-out sealng avalable Termnals protecton IP 20 Housng type Housng materal Housng dmensons Mountng hole Assembly depth Panel thckness Operatng temperature (dependng on verson) Storage temperature (dependng on verson) Humdty Alttude panel NORYL - GFN2S E1 48 x 96 x 100 mm 43 x 90.5 mm 102 mm max. 5 mm 0 C to +50 C or -20 C to +50 C -10 C to +70 C or -20 C to +70 C 5 to 90% no condensaton up to 2000 meters above sea level Screws tghtenng max. torque 0,5 Nm Max. connecton leads dameter 2,5 mm 2 Safety requrements accordng to: PN-EN 61010-1 nstallaton category: II polluton degree: 2 voltage n relaton to ground: 300V AC 5

nsulaton resstance: >20MΩ nsulaton strength between power supply and nput/output termnal: 1mn. @ 2300V nsulaton strength between relays termnal: 1mn. @ 1350V EMC accordng to: PN-EN 61326-1! Ths s a class A unt. In a resdental or a smlar area t can cause rado frequency nterference. In such cases the user can be requested to use approprate preventve measures. 4. DEVICE INSTALLATION The unt has been desgned and manufactured n a way assurng a hgh level of user safety and resstance to nterference occurrng n a typcal ndustral envronment. In order to take full advantage of these characterstcs nstallaton of the unt must be conducted correctly and accordng to the local regulatons.! - Read the basc safety requrements on page 3 pror to startng the nstallaton. - Ensure that the power supply network voltage corresponds to the nomnal voltage stated on the unt s dentfcaton label. - The load must correspond to the requrements lsted n the techncal data. - All nstallaton works must be conducted wth a dsconnected power supply. - Protectng the power supply connectons aganst unauthorzed persons must be taken nto consderaton. 4.1. UNPACKING After removng the unt from the protectve packagng, check for transportaton damage. Any transportaton damage must be mmedately reported to the carrer. Also, wrte down the unt seral number located on the housng and report the damage to the manufacturer. Attached wth the unt please fnd: - user s manual, - warranty, - assembly brackets - 2 peces. 4.2. ASSEMBLY 6! - The unt s desgned for mountng nsde housngs (control panel, swtchboard) nsurng approprate protecton aganst surges and nterference. Metal housngs must be connected to ground n a way that comples wth the governng regulatons. - Dsconnect the power supply pror to startng assembly.

!! - Check the connectons are wred correctly pror to swtchng the unt on. In order to nstall the unt, a 43 x 90.5 mm mountng hole (Fgure 4.1) must be prepared. The thckness of the materal of whch the panel s made must not exceed 5mm. When preparng the mountng hole take the grooves for catches located on both sdes of the housng nto consderaton (Fgure 4.1). Place the unt n the mountng hole nsertng t from the front sde of the panel, and then fx t usng the brackets (Fgure 4.2). The mnmum dstances between the centre ponts of multple unts - due to the thermal and mechancal condtons of operaton - are 67 mm x 115 mm (Fgure 4.3). a) 43 mm 1 mm 8 mm 13 mm 13 mm 90,5 mm 8 mm 1 mm max. 5 mm 7

b) 43 mm 92 mm max. 5 mm Fgure 4.1. Mountng hole dmensons: a) recommended b) allowable 92 mm 5 mm 8,5 mm 12 mm 10 mm 16 mm Fgure 4.2. Installng of brackets, and dmensons of connectors. 8

67 mm 115 mm Fgure 4.3. Mnmum dstances when assembly of a number of unts. 4.3. CONNECTION METHOD Cauton! - Installaton should be conducted by qualfed personnel. Durng nstallaton all avalable safety requrements should be consdered. The ftter s responsble for executng the nstallaton accordng to ths manual, local safety and EMC regulatons. - The unt s not equpped wth an nternal fuse or power supply crcut breaker. Because of ths an external tme-delay cut-out fuse wth a small nomnal current value must be used (recommended bpolar, max. 2A) and a power supply crcutbreaker located near the unt. In the case of usng a monopolar fuse t must be mounted on the phase cable (L). - The power supply network cable dameter must be selected n such a way that n the case of a short crcut of the cable from the sde of the unt the cable shall be protected aganst destructon wth an electrcal nstallaton fuse. - Wrng must meet approprate standards and local regulatons and laws. - In order to secure aganst accdental short crcut the connecton cables must be termnated wth approprate nsulated cable tps. 9

! - Tghten the clampng screws. The recommended tghtenng torque s 0.5 Nm. Loose screws can cause fre or defectve operaton. Over tghtenng can lead to damagng the connectons nsde the unts and breakng the thread. - In the case of the unt beng ftted wth separable clamps they should be nserted nto approprate connectors n the unt, even f they are not used for any connectons. - Unused termnals (marked as n.c.) must not be used for connectng any connectng cables (e.g. as brdges), because ths can cause damage to the equpment or electrc shock. - If the unt s equpped wth housng, covers and sealng to, protectng aganst water ntruson, pay specal attenton to ther correct tghtenng or clampng. In the case of any doubt consder usng addtonal preventve measures (covers, roofng, seals, etc.). Carelessly executed assembly can ncrease the rsk of electrc shock. - After the nstallaton s completed do not touch the unt s connectons when t s swtched on, because t carres the rsk of electrcal shock. Due to possble sgnfcant nterference n ndustral nstallatons approprate measures assurng correct operaton of the unt must be appled. To avod the unt of mproper ndcatons keep recommendatons lsted below. Avod runnng sgnal cables and transmsson cables together wth power supply cables and cables controllng nductve loads (e.g. contactors). Such cables should cross at a rght angle. Contactor cols and nductve loads should be equpped wth nterference protecton systems, e.g. RC-type. Use of screened sgnal cables s recommended. Sgnal cable screens should be connected to the earthng only at one of the ends of the screened cable. In the case of magnetcally nduced nterference the use of twsted par of sgnal cables s recommended. Twsted par (best f shelded) must be used wth RS-485 seral transmsson connectons. In the case of measurement or control sgnals are longer than 30m or go outsde of the buldng then addtonal safety crcuts are requred. In the case of nterference from the power supply sde the use of approprate nterference flters s recommended. Bear n mnd that the connecton between the flter and the unt should be as short as possble and the metal housng of the flter must be connected to the earth wth the largest possble surface. The cables connected to the flter output must not be run wth cables wth nterference (e.g. crcuts controllng relays or contactors). Connectons of power supply voltage and measurement sgnals are executed usng the screw connectons on the back of the unt s housng. 10

! 16 31 max. 2 mm 6-7 mm Fgure 4.4. Method of cable nsulaton replacng and cable termnals All connectons must be made whle power supply s dsconnected! Double numeraton means, that dependng on devce verson, partcular termnal can be marked accordng to the top or bottom number. Power supply (dependng on verson) Power +24V +5%, -10% RS - 485 Imax = 100mA supply optonal ACTIVE GND DATA+ (dependng on verson) current output + Uo - DATA- - + 1 2 3 4 5 6 7 8 9 (optonal) R4 +24V +5%, -10% RS - 485 Imax = 100mA GND DATA+ DATA- + Uo - 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 R1 (optonal) R2 (optonal) R3 (optonal) 16 17 18 19 20 31 32 33 34 35 n.c. + + n.c. 0/4-20mA GND 0/1-5V, 0/2-10V Fgure 4.5. Termnals descrpton (relay outputs, no current output verson) 10 11 12 13 14 15 R1 (optonal) R2 (optonal) n.c. n.c. 16 17 18 19 20 31 32 33 34 35 n.c. + + n.c. 0/4-20mA GND 0/1-5V, 0/2-10V Fgure 4.6. Termnals descrpton (relay outputs, devce wth current output) 11

Power supply (dependng on verson) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 - + + - OC1 OC2 (optonal) (optonal) + - OC3 (optonal) OC1 OC4: Umax = 30V DC, Imax = 30mA, Pmax = 100mW +24V +5%, -10% RS - 485 (optonal) Imax = 100mA GND DATA+ OC4 + Uo - DATA- - + 16 17 18 19 20 31 32 33 34 35 n.c. + + n.c. 0/4-20mA GND 0/1-5V, 0/2-10V Fgure 4.7. Termnals descrpton (OC-type outputs) + - 5 6 nternally connected 16 17 18 19 20 31 32 33 34 35 16 17 18 19 20 31 32 33 34 35 24V DC - + + - - + Fgure 4.8.Connecton of 2-wre current converters + - 5 6 nternally connected 16 17 18 19 20 31 32 33 34 35 16 17 18 19 20 31 32 33 34 35 24V DC - + - + + - Fgure 4.9. Connecton of 3-wre current converters 12

+ User manual - METER SRL-49 - + 5 6 nternally connected 16 17 18 19 20 31 32 33 34 35 16 17 18 19 20 31 32 33 34 35 24V DC - + + + + - - Fgure 4.10. Connecton of voltage converters L N 1 2 FUSE FUSE R1 R2 R3 10 11 12 13 14 15 R4 3 4 L N Dependng on verson: 85...230...260V AC/DC or 19...24...50V DC; 16...24...35V AC Fgure 4.11. Connecton of power supply and relays! Contacts of relay outputs are not equpped wth spark suppressors. Whle use the relay outputs for swtchng of nductve loads (cols, contactors, power relays, electromagnets, motors etc.) t s requred to use addtonal suppresson crcut (typcally capactor 47nF/ mn. 250VAC n seres wth 100R/5W resstor), connected n parallel to relay termnals or (better) drectly on the load. In consequence of usng the suppresson crcut, the level of generated electromagnetc dsturbances s lower, and the lfe of relay contacts rses. 13

a) b) L L 10 11 10 11!! N N Fgure 4.12. Examples of suppresson crcut connecton: a) to relay termnals; b) to the nductve load OC1 10 11 - + Logc controller + - voltage nput 24 V Uo 5 6 + - OC1 10 11 - + LED 10 ma R 2k2 Uo 5 6 + - Fgure 4.13. Example of OC-type outputs connecton optonal ACTIVE current output - + 3 4 Logc controller + current nput 4-20 ma - 14 Fgure 4.14. Example of current outputs connecton (for devce wth current output only)

4.4. MAINTENANCE The unt does not have any nternal replaceable or adjustable components avalable to the user. Pay attenton to the ambent temperature n the room where the unt s operatng. Excessvely hgh temperatures cause faster ageng of the nternal components and shorten the fault-free tme of the unt's operaton. In cases where the unt gets drty do not clean wth solvents. For cleanng use warm water wth small amount of detergent or n the case of more sgnfcant contamnaton ethyl or sopropyl alcohol.! Usng any other agents can cause permanent damage to the housng. Product marked wth ths symbol should not be placed n muncpal waste. Please check local regulatons for dsposal of electronc products. 5. FRONT PANEL DRIPTION alarm LED ndcator (AL) AL R1 R2 R3 R4 Thresholds exceedng LED ndcators (R) 100 90 80 70 dsplay 60 bargraph 50 40 30 20 programmng pushbuttons 10 0 Symbols and functons of push-buttons: Symbol used n the manual: [/] Functons: Enter to man menu ( press and hold by at least 2 sec.) Ext the current level and Enter to prevous menu (or measure mode) Cancel the changes made n parameter beng edted Symbol used n the manual: [] Functons: Start to edt the parameter Enter to the sub-menu, Confrmaton of changes made n parameter beng edted 15

Symbol used n the manual: [^] [v] Functons: Change of the present menu, Modfcaton of the parameter value, Change of the dsplay mode. 6. PRINCIPLE OF OPERATION After turnng the power supply on, devce ID and software verson are showed on the dsplay, next the controller goes to the measurement mode. 6.1. MEASUREMENT MODE In the measure mode, the measurement results, converted over selected characterstc, are dsplayed on the LED dsplay. The measurement range equal to the nomnal range s called: nomnal measurement range, and the measurement range equal to the extended nomnal range s called: permssble measurement range (Fgure 6.1, 6.2). Lo r parameter nomnal measurement range H r parameter 4 ma 20 ma permssble measurement range Fgure 6.1. Defntons of measurement ranges n mode 4 20mA If the result of measurement exceeds the permssble measurement range, warnng -H- or -Lo- s dsplayed rather than nput sgnal, depends on exceeded value (see descrpton of Lo r H r parameters, paragraph npt menu). nomnal measurement range H r parameter 0 ma 20 ma permssble measurement range Fgure 6.2. Defntons of measurement ranges n mode 0 20mA If the measurement value do not exceeds permssble measurement range but dsplayed value exceeds range -999 9999, the warnng -Ov- s dsplayed rather than the calculated result. In the measurement mode user can check man thresholds values. After pressng [^] or 16

[v] button, name of the threshold (e.g. rel1 ) and hs value wll be dsplayed on the dsplay n alternatng mode. If [^] or [v] wll be pressed n 5 sec agan, the next threshold wll be dsplayed, else the devce comes back to the measurement mode. If a free access s enabled (see descrpton of SECu menu), user can change the value of partcular threshold pressng button [] (see: PARAMETERS EDITION). Input type, range of dsplayng values, characterstc of converson, decmal pont poston and measure flterng rato, are user confgurable parameters. All accessble parameters can be changed by enterng the menu (see: DEVICE PROGRAMMING). Use the local keyboard or the remote controller to do t. (Note: all parameters can be remote changed va RS-485 nterface). Confguraton of the devce (va menu or RS-485 nterface) do not stops measures. 6.2. DETECTION OF THE PEAK VALUES The SRL-49 controller s equpped wth peaks detecton functon. It can detect a peaks of the nput sgnal and dsplay ther values. Presets connected wth ths functon are placed n HOLd menu (see descrpton of HOLd menu). The detecton of the peak can be done f the measured sgnal rases and drops of value at least equal to parameter PEA. Detected peaks are dsplayed durng the tme defned by parameter tme. If a new peak wll be detected whle one s dsplayed, ths new peak wll be dsplayed and dsplay tme counter wll be cleared (Fgure 6.3). If no peaks are detected whle tme tme elapses, devce starts to show the current value of nput sgnal agan. If HdS = HOLD then settng parameter "tme"=0.0 causes holdng peak value untl [] button s pressed. If HdS = real then value "tme"=0.0 means no holdng. Dsplayng peak value s sgnalzed by flashng most rght decmal pont. The relays/leds and the current output can be controlled depend on the current value of nput sgnal or the peak value (see HOLd menu). measure tme tme PEA PEA real measurement result dsplay value tme Fgure 6.3. Process of peaks detecton 17

6.3. CONTROL OF THE RELAY OUTPUTS The control of the object (measured sgnal) s realzed va relay outputs. Front panel LEDs named R ndcates the state of partcular relay output. If devce s not equpped wth one or more relay outputs, menus refer to ths relays are avalable, but apply to LED ndcators only. In such case LEDs ndcates exceedng of partcular thresholds. Modes of the control can be changed depend on the values of parameters SEtP, SEt2, HYSt, mode, t on, toff, unt and AL. Depend on mode parameter, relays can be not used or controlled over one or two thresholds values. If one threshold s used (Fgure 6.4) the relay can be turned on ( mode = on ) or off ( mode = off ) when the nput sgnal value s contaned n zone A. If two thresholds are used (Fgure 6.5) the relay wll be turned on when value of nput sgnal s contaned n zone A ( mode = n ) or zone B ( mode = out ) and turned off f the sgnal s contaned n the second one. state of relay/led SEtP parameter zone B zone A measure HYSt parameter Fgure 6.4. One threshold control of the relay/led outputs state of relay/led SEtP or SEt2 parameter zone B zone A zone B HYSt parameter measure Fgure 6.5. Two threshold control of the relay/led outputs The relay outputs and LEDs (named R) can be controlled depend on both - the current value and the peak value (when peak detecton s actve) of the nput sgnal. 18

6.3.1. One threshold mode Fgure 6.6 presents the prncple of relay outputs operaton for one threshold mode, and an example values of other parameters. a) dsplayed value zone A A measured t A t B t C sgnal t D B B OFF B ON SEtP parameter (expected sgnal value) b) c) d) e) zone B relay state (mode = on t on = 0 toff = 0) relay state (mode = off t on = 0 toff = 0) relay state (mode = on t on > 0 toff > 0) relay state (mode = off t on > 0 toff > 0) closed open open closed HYSt parameter (allowed sgnal devaton) Descrpton: A, B, C, D - ponts where measured sgnal exceeds border values (expected value ± allowed devaton) B ON,B OFF,D ON,D OFF - relays state changes moments: (for t on > 0, toff > 0) t A, t B, t C, t D - tme perods whle nput sgnal s n zone A or zone B C t on parameter open toff parameter open closed closed toff parameter D t on parameter D OFF D ON tme tme tme tme tme Fgure 6.6. Prncple of LED/relay output operaton for one threshold mode Parameter SEtP sets a threshold of the relay, and parameter HYSt sets a hysteress of the relay (Fgure 6.6 a). The relay can change hs state only when nput value exceeds (over or under) border value and t A,t B,t C,t D tmes (Fgure 6.6) are bgger than the tme defned by parameters t on, toff and unt. Border values means values equal threshold+hysteress and threshold-hysteress respectvely. If t on and toff parameters are set to 0, then the relay state wll be changed as soon as nput value exceeds any of the border values (see ponts A and C, Fgure 6.6 a, b, c). If values of t on or/and toff are postve, then relay state wll be turned on f the nput value exceeds the border values and stay bgger (or lower) durng at least t on (see ponts B ON, D ON, Fgure 6.6 a, d, e). Smlarly, the relay wll be turned off f tme toff elapse snce the nput sgnal value exceeds any of the border values (see ponts B OFF, D OFF, Fgure 6.6 a, d, e). 19

If t A,t B,t C or t D (when nput sgnal stay n zone A or zone B) are lower than parameters t on or toff, the relay wll not change hs state (see ponts A and C, Fgure 6.6 a, d, e). The state of relay output whle the nput value exceeds the border values (ponts A, B, C, D) s descrbed by parameter mode. The relay can be turned on ( mode = on ), or turned off ( mode = off ) when nput sgnal value s contaned n zone A (Fgure 6.6 a). The parameter AL allow user to set the relay output behavour n crtcal stuatons (e. g. Input values exceeds permssble measurement range). User can select that the relays wll be turned on, turned off,or not changed n crtcal stuatons. All parameters connected wth relay outputs are descrbed n paragraph rel1 menu. 6.3.2. Two thresholds mode dsplayed value t A t B t C t D measure zone B C OFF C ON d sgnal C t E HYSt parameter B ON a) zone A A B B OFF D E E OFF E ON SEtP or SEt2 parameter HYSt parameter zone B b) c) d) e) relay state (mode = n t on = 0 toff = 0) relay state (mode = out t on = 0 toff = 0) relay state (mode = n t on > 0 toff > 0) relay state (mode = out t on > 0 toff > 0) closed open t on parameter toff parameter open closed closed open toff parameter t on parameter closed open t on parameter toff parameter tme tme tme tme tme Objaśnene: A, B, C, D, E - ponts where measured sgnal exceeds border values (expected value ± allowed devaton) B ON,B OFF,C ON,C OFF,E ON,E OFF - relays state changes moments: (for t on > 0, toff > 0) t A, t B, t C, t D, t E - tme perods whle nput sgnal s n zone A or zone B Fgure 6.7. Prncple of LED/relay output operaton for two thresholds mode 20

Fgure 6.7 presents the prncple of relay outputs operaton for two thresholds mode, and an example values of other parameters. In ths mode parameter SEt2 s accessble n common wth SEtP, ths parameter descrbes a second threshold of the relay output. The parameters HYSt, mode, t on, toff, unt and AL are connected wth both SEtP and SEt2 thresholds. Whle the controllng process, the relay output changes hs state depends of both SEtP and SEt2 thresholds n smlar way as t was descrbed n one threshold mode. If two threshold mode s used, mode parameter defnes state of the relay output when the nput value occurs n a partcular zone defned by border values of both thresholds. The relay can be turned on f the nput value s contaned n zone A ( mode = n ) or zone B ( mode = out ) and turned off f t s contaned n the second one (Fgure 6.7). The sequence of thresholds SEtP and SEt2 can be set n any order, due to the control of relay outputs s done depend on dfference between thresholds values (zone A ) and outsde of threshold values (zone B). 7. DEVICE PROGRAMMING The devce menu allow user to set all parameters connected to operaton of measurement nput, control modes, crtcal stuatons behavour, communcaton va RS-485 and access settngs. The meanng of the partcular parameters s descrbed n paragraph DRIPTION. Some of the parameters can be accessed wthout menu enterng (quck vew mode). After pressng [^] or [v] button, name of the threshold (e.g. rel1 ) and hs value wll be dsplayed on the dsplay n alternatng mode. If [^] or [v] wll be pressed n 5 sec agan, the next threshold wll be dsplayed, else the devce comes back to the measurement mode. If a free access s enabled (see descrpton of SECu menu), user can change the value of partcular threshold pressng button [] (see: PARAMETERS EDITION). If partcular parameter has been changed and confrmed n quck vew mode, ts new value s dsplayed n alternatng mode wth parameter name by few seconds. Confrmed changes may be checked or user can swtch vewed parameter pressng [^] or [v] button. 7.1. PROGRAMMING To enter man menu (beng n the measurement mode) operator must to press and hold at least 2 sec. [/] button. If the user password s defned (see parameter Scod, menu SECU ), operator have to enter correct one before proceedng to menu optons. Enterng of the passwords s smlar to the edton of numerc parameters (see: PARAMETERS EDITION ), however presently edtng dgt s showed only on the dsplay, other dgts are replaced by - sgn. After enterng of last dgt of the password frst menu poston wll be dsplayed (f the password s correct) or warnng Err n other case.! Pay attenton when devce parameters are beng changed. If t s possble, turn off controlled nstallaton (machne). 21

Functons of the buttons whle sub-menu and parameters choce: Selecton of sub-menu or parameter for edtng. Name of selected tem (submenu or parameter) s dsplayed. Operaton of [] button depend on present menu poston: f the name of some sub-menu s dsplayed - enter ths sub-menu; name of the frst parameter (or next level sub-menu) s dsplayed, f the name of some parameter s dsplayed - enter the edton of ths parameter; present value of the parameter s dsplayed, [/] button allow user to ext present menu level and goes to upper level menu (or measurement mode). After about 1 mn. snce last use of the buttons, devce exts the menu mode and returns to the measurement mode (only f no parameters are n edtng mode). 7.2. PARAMETERS EDITION To start edton of any parameter user should select name of desred one usng [^] [v] buttons and then press []. 7.2.1. Numerc parameters (dgt change mode) Numercal parameters are dsplayed as decmal numbers. The mode of ts new value enterng depends on chosen edt method ( see parameter Edt ). In mode by dgt ( Edt = dg ) pressng one of the keys [^] or [v] causes change of current poston (flashng dgt) or the sgn (+/-). Short pressng of the [] button causes change of the poston (dgt). Press [] at least 2 seconds to accept the changes, after that queston SEt? s dsplayed, and user must to confrm (or cancel) the changes. To conform changes (and story t n EEPROM) press [] button shortly after SEt? s dsplayed. To cancel the changes press [] button shortly after SEt? s dsplayed. After that devce returns to the menu. 7.2.2. Numerc parameters (slde change mode) In slde change mode ( Edt = Sld ), buttons [^] and [v] has dfferent functons. To ncrease edted value press (or press and hold) [^] button only, the ncreasng became quckest as long as button [^] s pressed. To slow down the ncreasng, button [v] can be used. If [v] s pressed shortly (and button [^] s stll pressed), ncreasng slow down for a moment only, f [v] s pressed and held whle button [^] s stll pressed the ncreasng slow down and wll be kept on lower speed. To decrease edted value press (or press and hold ) [v] button only. The decreasng became quckest as long as button [v] s pressed. To slow down the decreasng, button [^] can be used. If [^] s pressed shortly (and button [v] s stll pressed), decreasng slow down for a moment only, f [^] s pressed and held whle button [v] s stll pressed the decreasng slow 22

down and wll be kept on lower speed. Press [] at least 2 seconds to accept the changes, after that queston Set? s dsplayed, and user must to confrm (or cancel) the changes. To conform changes (and story t n EEPROM) press [] button shortly after SEt? s dsplayed. To cancel the changes press [] button shortly after SEt? s dsplayed. After that devce returns to the menu. 7.2.3. Swtch parameters ( LIST type) Swtch parameters can be descrbed as a sets of values (a lsts) out of whch only one of the optons avalable on the lst can be selected for the gven parameter. Optons of swtchng parameter are selected usng [^], [v] keys. Short pressng of [] causes n dsplayng of the acknowledge queston ( SEt? ). If key [] s pressed agan, the changes are accepted, stored n EEPROM end the edton process fnshed. Pressng the key [] after SEt? causes n cancellng of made changes and returnng to menu. Functons of buttons when edtng numerc and swtchng parameters: Whle edtng numerc parameter: change of current (flashng) dgt slde change of value (acceleraton, deceleraton, drecton change) Whle edtng swtch parameter - selecton of swtch parameter. If numercal parameter s beng edted, a short press of [] button change edted poston. A long press of [] button (at lest 2 sec.) causes of dsplay a SEt? ask, whch allow user to make sure f change of the parameter value s correct. If swtch parameter s beng edted, a short press of [] button causes of dsplay a SEt? ask. When [] button s pressed agan (whle SEt? s dsplayed) the new value of the parameter s stored n EEPROM memory. Pressng ths button operator can cancel the changes done up to now (f they were not approved by [] button after the SEt? ask) and come back to menu 7.3. DRIPTION - - - - - password checkng. If some password dfferent from 0000 s set, then every enter to man menu follows the enterng of password. If entered password s correct then frst menu poston wll be dsplayed else warnng Err, and unt returns to measurement mode. Due to problem wth drect dsplayng of m and K letters, they are exchanged wth specal sgns for m and for K respectvely. However, n user manual letters m and K are used to make t more readable (example: mode, tc K ). 23

7.3.1. rel1 menu Ths menu allows to confgure the operaton mode of relays and LEDs marked R (e.g. R1 ). If there are few relay outputs avalable, then every output has ts own confguraton menu (e.g. menu rel2 for relay (LED) R2 ). Prncple of the relays operaton s descrbed n paragraph CONTROL OF THE RELAY OUTPUTS. SEtP SEt2 HYSt The relay outputs and LEDs (named R) can be controlled depend on both - the current value and the peak value (when peak detecton s actve) of the nput sgnal. If devce s not equpped wth one or more relay outputs, menus refer to ths relays are avalable, but apply to LED ndcators only. In such case LEDs ndcates exceedng of partcular thresholds. - frst threshold of the relay (range -999 9999). Negatve values can be nput by selectng a - sgn on frst dgt (to change value use [^] and [v] buttons). Threshold s the medum value of relay hysteress. - second threshold of the relay (range -999 9999). Negatve values can be nput by selectng a - sgn on frst dgt ( to change value use [^] and [v] buttons). Ths threshold s accessble when mode parameter s set to n or out value. Threshold s the medum value of relay hysteress. - hysteress of relay (range 0 999). Full hysteress of the relay s equal to 2x HYSt parameter. The relay state can change when an nput sgnal s out of threshold-hysteress to threshold+hysteress zone. Presented parameters should be set to ensure that SEtP + HYSt, SEt2 + HYSt, SEtP - HYSt or SEt2 - HYSt do not exceeds the measure range. Addtonally, n two threshold mode ( mode = n or out ), the hysteress for both thresholds must not cover each other (n other case relay can't change hs state). mode - relay operaton mode: 24 noac on off n - the relay s not actve (permanent turned off) - one threshold mode, the relay s turned ON when nput sgnal exceeds SEtP + HYSt value, and s turned off back when the nput sgnal became lower than SEtP HYSt, - one threshold mode, the relay s turned OFF when nput sgnal exceeds SEtP + HYSt value, and s turned on back when the nput sgnal became lower than SEtP HYSt, - two threshold mode, the relay s turned ON when the nput sgnal s bgger than lower threshold + HYSt and lower than bgger threshold HYSt, and turned off when the nput sgnal s contaned n the second zone. The bgger threshold means bgger one of SEtP and SEt2 thresholds, the lower threshold means lower one of SEtP and SEt2 thresholds.

out - two threshold mode, relay s turned ON when the nput value s bgger than bgger threshold + HYSt and lower than lower threshold HYSt, and turned on when the nput sgnal s contaned n the second zone. The bgger threshold means bgger one of SEtP and SEt2 thresholds, the lower threshold means lower one of SEtP and SEt2 thresholds. modb - the relay s controlled va RS-485 nterface, ndependently on the nput sgnal. LEDs lght when relays are closed, ndependently of relays' mode. When power supply fal, unt do not store relays state selected by RS-485 nterface. t on - turn on delay tme, the relay s turned on wth delay equal t on f the nput value exceeds approprate border value (defned wth threshold and hysteress), at least t on tme. t on range 0 99.9, defned wth 0.1 sec. resoluton. Unt of ths parameter s set by unt parameter. toff unt - turn off delay tme, the relay s turned off wth delay equal toff f the nput value exceeds approprate border value (defned wth threshold and hysteress), at least toff tme. toff range 0 99.9, defned wth 0.1 sec. resoluton. Unt of ths parameter s set by unt parameter. If tme when the nput sgnal exceeds some border value s shorter than t on or toff tme, the relay do not change hs state (see paragraph: CONTROL OF THE RELAY OUTPUTS). - unt of tme for t on toff parameters. Can be set on one of two values: mn SEC - mnutes, - seconds. AL - ths parameter defnes the relay reacton when some crtcal stuatons occurs: noch on off - relay do not change hs state, - relay wll be turned on, - relay wll be turned off. If parameter mode s set to on, off, n or Out the crtcal stuaton means that allowable measurement range s exceeded. If parameter mode s set to modb, the crtcal stuaton means communcaton delay (when no data s receved) longer than mbto parameter (see descrpton: rs menu). If opton noch s selected for AL parameter, behavour of the relay may depend on FLt parameter n some cases. If FLt s set to bg value and the nput sgnal drops, result value of the measure wll change slow, causes of turnng on or off relay due to thresholds values. The crtcal stuaton s slowly 25

detected, so t s mpossble to predct the relay state n that stuatons. If parameter AL = on, the relay wll be turned on n the crtcal stuatons, even f hs parameter mode = noac. 7.3.2. beep menu Ths menu contans optons connected wth acoustc sgnal : "AL "r1 "r2" "r3" "r4" - f ths parameter s set to on, any crtcal stuaton causes by acoustc sgnal - f ths parameter s set to on, actvaton of relay R1 causes by acoustc sgnal - f ths parameter s set to on, actvaton of relay R2 causes by acoustc sgnal - f ths parameter s set to on, actvaton of relay R3 causes by acoustc sgnal - f ths parameter s set to on, actvaton of relay R4 causes by acoustc sgnal Acoustc sgnal (turned on by e.g. relay ) can be turned off by pressng of any button 7.3.3. npt menu Ths menu presets the measurement nput: type" - type of the nput / sensor. Ths parameter can be set to values: 0-20, 4-20 - current nputs. 0-10, 2-10, 0-5, 1-5 - voltage nputs. Dsplayed values are defned by parameters Lo C, H C (or by user defned characterstc ponts) and parameter Pnt. CHAr - ths opton presets type of the converson characterstc, and can be set to: Ln - lnear Sqr - square When one of those characterstcs s chosen dsplay Sqrt - square root range s defned by Lo C and H C. USEr tn v n h - user defned characterstc. Maxmal length 20 ponts. Every pont s defned by user. Addng, Edtng and Deletng of ponts s done by optons AddP, EdtP, delp ( InPt menu) respectvely. - volume characterstcs of a cylndrcal tank n the vertcal poston, determned by parameters: t h1, t h2, t h3, t d, t Sn, t Sh n InPt menu (see below for detals of the parameters), - volume characterstcs of a cylndrcal tank n the horzontal poston, determned by parameters: t h1, t h2, t h3, t d, t Sn, t Sh n InPt menu (see below for detals of the parameters). If user defned characterstc s selected, and f number of defned ponts s lower than 2 then warnng Errc s dsplayed n measurement mode. The process of dsplayed result calculaton s descrbed n detals n DISPLAY VALUES CALCULATION paragraph. 26

FLt - ths parameter sets fltraton rate. It can be set to values from 0 (no fltraton ) to 5 (strongest fltraton tme wndow about 2 sec). Pnt Lo C H C - decmal pont poston. It can be set to one of: 0, 0.0, 0.00, 0.000 Decmal pont poston s changed by [^], [v] buttons. These parameters descrbe the values dsplayed for mnmum and maxmum nput current. For example, f nput type s set to 4-20 ma Lo C parameter defnes the value dsplayed when nput current s equal 4 ma, and H C parameter defnes the value dsplayed for 20 ma of nput current. Avalable range for these parameters: -999 9999. Negatve values can be set by enterng '-' sgn on the frst poston (by use of [^], [v] buttons). If volume characterstcs of a cylndrcal tank s selected (parameter CHAr = tn v or CHAr = tn h ) the parameters Lo C and H C are not avalable. t h1, t h2, t h3, t d - the parameters defnng shape of cylndrcal tank (Fgure 7.1 and Fgure 7.2). a) for the cylndrcal tank n the vertcal poston: t h1 - the heght of the bottom part of a tank (n the ellptc parabolod shape), ths parameter has the fxed precson - 2-decmal pont, t h2 - the heght of the mddle part of a tank n the cylndrcal shape, ths parameter has the fxed precson - 2-decmal pont, t h3 - the heght of the top part of a tank (n the ellptc parabolod shape), ths parameter has the fxed precson - 2-decmal pont, t d - the dameter of the mddle part of a tank, ths parameter has the fxed precson - - 2-decmal pont, b) for the cylndrcal tank n the horzontal poston: t h1 - the length of the left bottom of a tank (n the ellptc parabolod shape), ths parameter has the fxed precson - 2-decmal pont, t h2 - the length of the mddle part of a tank n the cylndrcal shape, ths parameter has the fxed precson - 2-decmal pont, t h3 - the length of the rght bottom of a tank (n the ellptc parabolod shape), ths parameter has the fxed precson - 2-decmal pont, t d - the dameter of the mddle part of a tank, ths parameter has the fxed precson - - 2-decmal pont, t Sn, t Sh - parameters defnng the length and poston of the sensor used to measure 27

level of lquds, gases or solds n the tank (Fgure 7.1, 7.2). t Sn - dstance between end of the sensor and bottom of the tank, ths parameter has the fxed precson 2-decmal pont but the unt s 100 tmes smaller than t Sh (see Info below), t Sh - the measurng range, ths parameter has the fxed precson - 2-decmal pont. The unt value of t Sn parameter s 100-fold less than the unt value of other parameters defnng cylndrcal tank,.e. f we set value 10.00 n t Sh parameter and set value 08.00 n "t Sn" parameter ths mean that value of t Sn parameter s real has 00.08 value n preserved unt of the t Sh parameter. If we set parameters of tank n [m] unt ( t Sn parameter takes [cm] unt respectvely, see above), than dsplays the result the volume of the tank n [m 3 ] unt, f we set parameters of tank n [cm] unt ( t Sn parameter takes [mm] unt respectvely, see above), than dsplays the result the volume of the tank n [cm 3 ] unt. "t Sh" parameter may be greater than heght (for vertcal poston) or dameter (for horzontal poston) of the tank, whch means that the total volume of the tank can be acheved by eg. such mddle-current range, If the measurement value do not exceeds permssble measurement range but dsplayed value exceeds range of 9999 than you can move to the rght poston of the decmal pont f t s stll possble (see parameter Menu- > npt -> Pnt ). If n the volume characterstcs of a cylndrcal tank s exceeded the value of the volume of the tank sets by parameters avalable n menu "npt" nstead of the calculated result wll be dsplay warnng -H-. 28

t h3 t Sh t h2 t d h~i[ma] t Sn t h1 Fgure 7.1 Parameters of cylndrcal tank n vertcal poston. t Sh t h1 t h2 t h3 t d h~i[ma] t Sn Fgure 7.2 Parameters of cylndrcal tank n horzontal poston. 29

AddP delp EdtP If user defned characterstc s selected (parameter CHAr = USEr ) the parameters Lo C and H C are not avalable for modfcaton, due to ther values are calculated from defned characterstc. - ths menu allow user to add sngle pont to the user defned characterstc. After selecton of ths opton devce wats for X and Y coordnates of new pont. Modfcaton of the coordnates s done accordngly to numercal parameters edton. Coordnate X defnes the percentage rato of nput current to selected current range. The X range: -99,9 199,9. Coordnate Y defnes dsplayed value for partcular X value. The Y value can be changed n range: -999 9999, decmal pont poston depend on Pnt parameter (menu npt ). User can not enter two ponts wth the same value of X coordnate. If user trays to do t, Err warnng s dsplayed. To modfy any defned pont use EdtP opton. To dstngush X and Y coordnates, f X coordnate s dsplayed an addtonal decmal pont on utmost rght poston s dsplayed. If user defned characterstc s selected, and f number of defned ponts s lower than 2 then warnng Errc s dsplayed n measurement mode. - ths opton allows user to delete any of the ponts of the user defned characterstc. After selecton current number of ponts of the user defned characterstc s dsplayed for about approx. 1.5 sec. After that devce wats for selecton of pont beng deleted (by [^], [v] buttons). The short pressng of [] button causes by swtchng between X and Y value of the dsplayed pont. The long press (press and hold at least 2 sec) of [] button causes by dsplayng del? ask. If [] button s pressed agan, current pont s deleted and new updated number of ponts of the user defned characterstc s dsplayed. - ths opton allows user to modfy of partcular pont of the user defned characterstc. After selecton current number of ponts of the user defned characterstc s dsplayed for about approx. 1.5 sec. After that devce wats for selecton of pont beng edted (by [^], [v] buttons). The short pressng of [] button causes by swtchng between X and Y value of the dsplayed pont. The long press (press and hold at least 2 sec) of [] button causes by enterng to edt the selected coordnate of the pont. Modfcaton of the coordnates s done accordngly to numercal parameters edton. AddP, delp and EdtP optons are avalable only f the user defned characterstc s used (t means when parameter CHAr = USEr ). Lo r, H r - these parameters defne the expanson of nomnal range n percent. They determne the permssble range of nput sgnal (Fgure 7.3). The permssble range allow user to exceed the nomnal range of nput sgnal. If nput value s contaned n the permssble range a proper result s dsplayed. If nput sgnal exceeds ths range (defned by Lo r and H r ), -Lo- or - H- warnng s dsplayed depend on nput sgnal value. 30

Lo r = 75,0% (3 ma) I mn nomnal measurement range (4-20mA) H r = 5,0 % (1 ma) I max 0 1 4 20 21 22 [ma] permssble measurement range dsplay message -Lo- measurement result s dsplayed regardless on nomnal range exceedng dsplay message -H- Fgure 7.3 Example of defnton of permssble range of nput sgnal - Lo r and H r parameters ( 4-20 mode) The Lo r parameter s mportant f nput s set to 4-20, 1-5 or 2-10 mode only, and determnes lower border of the permssble range. If nput s set to 0-20, 0-5 or 0-10 mode then lower border of the permssble range s always 0. For example f nput s set to 4-20 mode, then lower border s calculated due to expresson: I mn = 4 ma - 4 ma Lo r %. The Lo r value can be set from 0 to 99.9%. Parameter H r determnes the upper border of the permssble range accordngly to the expresson (for all modes). For example f nput s set to 4-20 mode, then upper border s calculated due to expresson: I max = 20 ma + 20 ma H r %. The value of H r can be set from 0 to 19.9% In example no 1 of the DISPLAY VALUES CALCULATION paragraph the procedure of the permssble nput range determnng s presented n detals. If the measurement value do not exceeds permssble measurement range but dsplayed value exceeds range -999 9999, the warnng -Ov- s dsplayed rather than the calculated result. 7.3.4. OutP menu Ths menu contans parameters of current output control. Menu s avalable f the devce s equpped wtch current output. Omod Current output can be controlled depend on both present measured value and peak value (f peak detecton s enabled). - current output mode, can be set to values: off - current output dsabled, 0-20 - current output enabled wth 0 20 ma mode, 4-20 - current output enabled wth 4 20 ma mode, modb - current output controlled va RS-485 nterface. 31

OUtL OUtH - ths parameter determnes the nput value for whch the output current s mnmal (0 ma or 4 ma depend of current output mode Omod ). - ths parameter determnes the nput value for whch the output current s equal 20mA. The output current value s calculated due to formulas gven below: W " OUtL" I out = "OUtH" "OUtL" 16 ma 4mA for output range 4 20 ma I out = W "OUtL" "OUtH" "OUtL" 20 ma for output range 0 20 ma where W denotes the dsplayed value. Lo r, H r OutL parameter can be greater than OutH. In ths case the converson characterstc s reversed, t means that f nput value rases the output current falls. - ths parameters defne the output current range (maxmum range 0 to 24 ma). If calculated output value I out exceeds defned range then current output generates the current equal to upper or lower border of the defned range. The parameters defne the percentage extenson of nomnal current range 4-20 ma (wth 0,1% resoluton). Parameter Lo r defnes lower border of the range due to formula: I mn = 4 ma - 4 ma Lo r %. Ths parameter can be set from 0 to 99.9%. Parameter H r defnes lower border of the range due to formula: I max = 20 ma + 20 ma H r %. Ths parameter can be set from 0 to 19.9%. In example on page 47 of the DISPLAY VALUES CALCULATION paragraph the procedure of the current outputs determnng s presented n detals. AL - ths parameter determnes the behavour of current output f any crtcal stuaton occurs. The parameter can be set to one of the values: noch - current wll not change, 22.1 - current wll be set to 22.1 ma, 3.4 - current wll be set to 3.4 ma, 0.0 - current wll be set to 0 ma. When the crtcal stuaton goes, the current wll be set to value calculated due to formulas gven above. 7.3.5. bar menu 32 Ths menu allows to confgure the bargraph.