Instruction Manual Ultrasonic Level Meter Model: NUS KOBOLD Instruments Inc. 1801 Parkway View Drive Pittsburgh PA 15205 Phone (412) 788-2830 Fax (412)-788-4890 www.koboldusa.com Manual-NUS-8-13-02
Contents Contents...2 1. General...3 2. Specifications...4 3. Mechanical Installation...5 3.1.General Installation...5 3.2. Standpipe Mounting...6 3.3. Standard Mounting Configuration...6 4. Electrical Connection...7 4.1.Wiring...7 4.2. Wiring Interconnection...7 4.3. Wiring Diagram...8 5. Operation...9 5.1. Function Display...10 5.2. Operation...11 5.3. Setup Overview...12 5.4. Measured Value and Status Display...12 5.5.Quick Meter Setup for Normal Applications...13 5.6. Linearization...14 5.7. Current Output Adjustment...18 5.8.Echo Quality...21 5.9. Additional Input Possibilities...23 5.10. Simulation and Function Test...24 5.11. Interlocking...25 5.12. Adjustment of the LED Display (when equipped)...27 6. Errors and Warnings...29 6.1. Diagnostics and Error Elimination...29 6.2.Error Codes...30 7. Dimensions...31 8. Error Analysis...32 9. V-H Setup Matrix...34 10. Quick Meter Setup for Normal Applications: Overview...35 Manufactured and Marketed by: Kobold Instruments Inc. 1801 Parkway View Drive Pittsburgh, PA 15205 412-788-2830 Fax: 412-788-4890 www.koboldusa.com Page 2
KOBOLD NUS Level Transmitter User Instructions CAUTION: For safety reasons, please read the cautionary information located at the end of the manual before attempting installation. These devices may only be installed, used and maintained by skilled personnel, who are familiar with this service manual and can observe applicable regulations regarding industrial safety and accident prevention. 1. General The KOBOLD NUS is intended for use in applications where level measurement is desired and the level data needs to be indicated locally and/or transmitted to a location remote from the level transmitter. The NUS may be equipped with a 4-digit, 7-segment red LED display for local level indication that may be scaled in the users desired engineering units. The NUS also contains a level transmitter that outputs a 4-20 ma, analog signal. This signal is proportional to the tank level measured by the instrument. The NUS is readily adjusted and scaled by the user via internally accessible buttons. The NUS sensor is made of PVDF. This highly chemical-resistant material allows the NUS to be used in many difficult industrial applications, especially in the chemical industry. The ultrasonic sensor emits ultrasonic pulses, which are reflected by the medium to be measured. These "echoes" are then received by the same sensor. The time taken by the ultrasonic pulses (to the material and back) is temperaturecompensated before measurement results are sent to the analog output and digital display. Page 3
2. Specifications Housing: Epoxy-Coated Aluminum, Polycarbonate Sensor and connection: PVDF Measuring range: Liquids: up to 23 (2 model) Liquids: up to 13 (1-1/2 model) Bulks: up to 15 (2 model) Bulks: up to 6 (1-1/2 model) Measuring accuracy: 0.25% of maximum range Resolution: +/- 0.12 Deadband or block distance: 10 (1-1/2 model), 16 (2 model) Frequency: 50 khz / 70 khz Pulse frequency: 0.5 to 3 Hz (depending on electronics version) Radiation beam: 5.5 conical Min. delay time: approx. 5 s Output signal: 4 to 20 ma Load: max. 600 Ohm Process temperature: -40 to +176 F (-40 to 80 C) Ambient temperature: -4 to +140 F (-20 to 60 C) Max. operating pressure: 30 PSIG (3 bar Abs.) Protection class: NEMA 4X / IP 67 Construction: Combination sensor and electronics Process connection: 1½ MNPT, 2 MNPT Electrical connection: 1 m cable(s) with ½ conduit connection Power supply: 12 to 36 VDC (2-wire) 90 to 127 VAC, 50-60 Hz. (4-wire) Display (when equipped): 4-digit, red LED Display, digit height: 0.3 (7.62 mm), programmable decimal point adjustment Display range: -1999...9999 Page 4
3. Mechanical Installation 3.1. General Installation Install the unit to the tank with appropriately sized fittings. Take care not to place stresses on the electronics housing. Use an appropriately sized wrench and do not overtighten the sensor during installation (maximum torque: 11-14 ft-lb.). Housing is not Rotatable! DO NOT apply force to the electronics housing! Max. Torque 11 14 Ft-lb. Due to decaying behavior of the ultrasonic sensor, there is an area directly below the sensor face where no pulses can be received. This so-called "Deadband" is very important for the correct operation of the sensor. This distance must be taken into consideration during installation, as it is the minimum distance allowed between the sensor face and the maximum filling state. The deadband ranges are: 10 (1-1/2 model) or 16 (2 model) Mount the sensor sufficiently high enough so that even with maximum filling of the container, the deadband space is never entered. Media that enters the deadband space will cause a malfunction (See the following section on Standpipe Mounting ). Never mount two ultrasonic level-measuring devices in one container, because the two devices can impair each other's function. Do not mount the sensor at the center of container's cover. Always install the sensor perpendicular to the material surface. Avoid measurements through the fill stream. Page 5
3.2. Standpipe Mounting If the desired maximum media filling height will enter the deadband space, the sensor must be installed on a short standpipe to prevent improper operation. No material may be allowed to form on the pipe ends. The recommended dimensions of the short standpipe are approximate values, which you can vary slightly if required. Keep the standpipe height as short as possible. The inner side of end-piece must be smooth no edges, no welding seams. During operation, noise echoes (that may be generated by a short feed pipe for example) may be faded out with the function (fade out noise-echoes, see page 20). Standpipe diameter and height D min (in.) L max (in.) 2 6 3 9.5 4 15 L D 3.3. Standard Mounting Configuration Mounting with 1-1/2 or 2 NPT Welded Sleeve Page 6
4. Electrical Connection 4.1. Wiring When utilizing the current output, use a shielded two-wire cable. For optimal electromagnetic compatibility, the shield of the cable should be grounded at the control room or at the nearest equipment ground point. The connection at the electronics housing uses a ½ conduit connection and an integral 1m cable for the 2-wire version, or a ½ conduit connection and two integral 1m cables for the 4-wire version. 4.2. Wiring Interconnection The ½ conduit connection allows for a wide range of cable terminations into a suitable junction box using flexible conduit, standard thinwall, or rigid conduit. A cable gland may be used on the 2-wire units where a flexible cable interconnection is permitted. PLEASE NOTE: The 2-wire units are 4-20mA loop-powered devices designed for use with an externally supplied 12-36 VDC power source. The 4-wire units are for use with 90-127 VAC, 50-60 Hz power and provide an internal power source for the 4-20mA output signal. DO NOT CONNECT THE 4- WIRE UNIT TO AN EXTERNALLY POWERED CURRENT LOOP OR DAMAGE TO THE ELECTRONICS WILL OCCUR. Page 7
4.3. Wiring Diagram 2-wire 4-wire (2 cable) + - Brown (+) 24 VDC / 4-20 ma 2-wire Black (-) G 2 1 AC ~ (1) AC ~ (2) Ground Grn/Yel Brown (+) + - 4-20 ma Black (-) Attention! In the event that the current output is not used, the output must be jumpered with a 250-ohm resistor to allow for display operation. Page 8
5. Operation The NUS Series offers a full range of user programmable functions and displays, such as: zero & span adjustment, sensor temperature, and echo quality. The programming features and display values are accessed via a programming matrix. This matrix has both a vertical (V) and horizontal (H) position that is shown on the function display. The instruction manual references these matrix positions in a VnHn format, where n = the vertical or horizontal matrix position. Example: V3H5 = 3 rd vertical matrix position and the 5 th horizontal matrix position. Navigation through the programming and status display matrix is performed via the function keys per section 5.2. The complete programming matrix is shown in: Section 9: V-H Setup Matrix. ATTENTION: Please review and familiarize yourself with the setup matrix information shown in Section 9 and the Quick Setup Adjustment shown in Section 5.5 and Section 10 before proceeding. Page 9
5.1. Function Display By removing the back cover, the internal electronics of the transducer become accessible. An LCD Display is provided for adjustments and visual display of functions. During operational disturbances, the electronics differentiate between an error and a warning. (Compare also: Section 6, Errors and Warnings ) 2- wire Electronics detects an error The bargraph is flashing within the display The current output assumes the user selected fault value of: 3.8mA, 22mA, or hold last value An error-code in V9H0 is displayed Electronics detects a warning The device continues to measure An error-code in V9H0 is displayed 4- wire Electronics detects a error The red LED next to function display flashes The bargraph is flashing within the display The current output assumes the user selected fault value of: 3.8mA, 22mA, or hold last value An error-code in V9H0 is displayed Electronics detects a warning The red LED next to function display lights up The device continues to measure An error-code in V9H0 is displayed Page 10
5.2. Operation The electronics are adjusted while viewing a 10 x 10 LCD matrix. In simplest case, adjustment is carried out only via three matrix fields. Display elements Parameter VH-Position Bargraph display -Display: Flow or Echo Quality -Flashes with disturbance The matrix field is shown under the letters VH. The appropriate parameter is displayed to the left. The bargraph flashes in case of error and displays the current or the quality of echo. Table 5.1 Function of Keys Keys Function Selection of matrix fields and Inputting Parameter or and Confirmation of input or Selection of vertical matrix position Selection of horizontal matrix position Return to V0H0 Activates the selected matrix position. Digit is flashing. Increases the displayed parameter Decreases the displayed parameter Resets the recent input value to the original value, if it is not confirmed with V or H key yet. Accepts the currently displayed parameter and moves to the next matrix position Matrix interlocking / unlocking (see also Section 5.11) and and Matrix interlocking, 9999 appears in V9H9 Matrix unlocking, 333 appears in V9H9 Page 11
5.3. Setup Overview Alignment Linearization no yes Volume measure in linear container Semi-automatic linearization thru >Liters out< Manual input of a linearization curve Special case: Cylindrical Horiz. tank Adjust current output analog digital Echo-quality Time-delay Noise-echo fade out First echo factor Simulation 5.4. Measured Value and Status Display Matrix field Table 5.2 Measured Value and Status Information Measured value display Display Matrix field Status display Display V0H0 Tank % full based on programmed span V9H0 Current error code V0H8 V0H9 Distance from sensor face to medium in user s units (ft/m) Bargraph shows echo quality Height of medium from empty point (V0H1) in user s units (ft/m) Bargraph shows echo quality V9H1 V9H2 Last error code Sensor and electronics identifier V9H8 Output current value in ma V9H3 Unit and software identifier V3H5 Temperature in Degrees C V3H2 Echo quality (1-10) Page 12
5.5. Quick Meter Setup for Normal Applications Table 5.3 Quick Meter Setup Step VH Input Text 1 V9H5 333 Reset to default factory parameters 2 V8H2 (0 / 1) User s desired measurement unit 0: meters (default) 1: feet 3 V0H1 E (m/ ft) Empty distance in user s units (actual value), 4mA setpoint 4 V0H2 F (m/ ft) Net distance medium will move to achieve a full tank in user s units (= empty distance - full distance), 20mA setpoint 5 V0H3 0 4 Application type (see below)! V0H3: Application type 0: Normal setting for most liquid applications (default) Full = 20 ma 1: Fast response setting. Empty = 4mA 2: Liquid applications for tanks with a domed cover. 3: Bulk materials with grain size > 5/32 (4mm) 4: Conveyer allocation Reset With a Reset, most adjustments for the device are canceled and the default factory settings apply. The following parameters do not change to factory default: All inputs for Linearization (V2H0 V2H3) the tag number (VAH0) and the measuring units (V8H2) Page 13
Attention: V8H2 Measuring Units The measuring units are not changed by a Reset. It may only be changed manually. If the measuring units are changed later, all of the changed following inputs must be repeated. Measurement Display: V0H0: Filling height in % V0H8: Distance in m / ft V0H9: Filling height in m / ft Please Note! All following inputs (linearization, current output and fixed target fadeout) must be entered in the user s selected measuring unit. NOTE: THE FEATURES INDICATED IN THE FOLLOWING SECTIONS (SECTIONS 5.6 THROUGH 5.10) ARE SPECIAL FEATURES AND ARE NECESSARY ONLY FOR SPECIAL TANK CONFIGURATIONS AND / OR APPLICATIONS WITH UNIQUE OPERATING CONDITIONS. 5.6. Linearization 5.6.1. Input of a Linearization Curve The input of the linearization curve must take place in the user s selected measuring units. Prior to entering a linearization curve, it is recommended that the linearization table is cleared to eliminate previously entered points with: V2H0 = 4. A linearization curve can consist of maximum of 11 points. The linearization points must always be entered such that the volume units increase for each linearization point as the tank level rises. Activate the linearization curve after inputting all value pairs with V2H0 = 1. If desired, the points of linearization curve may be modified individually by simply entering a new value pair. The corrected curve must also increase in volume from the previous point. Page 14
5.6.2. Adjustment of Current Output After linearization, the output current follows the linearization curve to provide an accurate volume measurement. Note: Errors and Warnings in V9H0 During the input of a linearization curve, the current output is subjected to an error and the unit stops measuring any further. The following linearization related errorindications may appear. E605: Display during the input of linearization curve. This error-indication disappears if the linearization curve is activated. E602: The linearization curve is not indicating a continuously rising volume level. In V2H1, the number of the last entered correct value pair appears automatically. Enter the new value in the next line of the table in V2H2 and V2H3. E604: The linearization curve consists of less than two value pairs. Supplement your inputs with additional value pairs. Measurement display after linearization: V0H0: Display in user-defined units V0H8: Distance in m / ft V0H9: Filling height in m / ft 5.6.3. Four Possibilities " Volume measurement with linear relation; filling state-volume: V2H0 = 5 BD Filling ht. Full=V 100% e.g.2000 l Empty Volume The Tank Full volume is input at V2H5. A linear level / volume relationship is assumed at all other points. Note! The volume in V2H5 is automatically assigned to the filling height at the tank full point. Page 15
Table 5.4 Volume Measurement with Linear Relation # VH Input Text 1 V2H0 4 H Delete 2 V2H0 5 H Linear 3 V2H5 e.g. 2000 H Volume (Full Scale) V 100% (e.g. 2000 l) # Inputting a Linearization Table for a Container through Volume Addition 4 m BD Filling ht. Full e.g. 5000 l 7 6 5 4 3 2 1 Empty The container is filled or emptied in a controlled manner, measuring the volume added at each linearization point. The known total volume is entered at each point. The level is automatically registered. Table 5.5 Linearization Through Volume Addition # VH Inputs Text 1 V2H0 4 H Delete 2 V2H0 3 H Measuring contents in liters 3 V2H1 7 H Line number 4 V2H2 e.g. 4.000 m H Level 5 V2H3 e.g. 5000 l H Volume input 6 V2H1 6 H Line number After entering all values V2H0 1 H Activate table Page 16
$ Manual Input of a Linearization Table BD Full 0.4 m Empty e.g. 100 l For a linearization curve, a maximum of 11 pairs of level and volume can be entered. Table 5.6 Manual Input of a Linearization Table # VH Input Text 1 V2H0 4 H Delete 2 V2H0 2 H Manually 3 V2H1 1 H Line No. 4 V2H2 e.g. 0. 400 m H Level input 5 V2H3 e.g. 100.0 l H Volume input 6 V2H1 2 H Line No. After inputting all value pairs V2H0 1 H Activate table % Special Case: Horizontally Mounted Cylindrical Tank Using the following example, with the diameter = 1, the linearization curve for any cylindrical and horizontally mounted tank, can be calculated. 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% BD V level % = V total V % 100 Page 17
Table 5.7 Line No. V2H1 Horizontally Mounted Cylindrical Tank Level V2H2 Volume V2H3 % User's value % User's value 1 0 0 2 10 5.20 3 20 14.24 4 30 25.23 5 40 37.35 6 50 50.00 7 60 62.64 8 70 74.77 9 80 85.76 10 90 94.79 11 100 100 5.7. Current Output Adjustment 5.7.1. Instructions for current output: The current output (zero and span) may be adjusted to a percentage of the empty and full distances entered previously in V0H1 and V0H2 (see Table 5.3). The current output may be inverted (if desired), so that the value in V0H5 is larger than value in V0H6. That means on increasing measured values, the current signal decreases. Integration time (V0H4): The integration time causes damping of current output and thus a delayed measured value on LCD Display. With a turbulent liquid, a stable display can be achieved by means of the integration time (0-255 sec) Output behavior on error (V0H7) 4- wire 2- wire 10 % 2.4 ma 3.8 ma +110 % 22 ma 22 ma 4 ma Threshold: This threshold ensures that the current value will not fall short of 4 ma during operation. Page 18
5.7.2. Errors and Warnings in V9H0 E620: The current output is outside of the adjusted range (smaller than 3.8 ma, greater than 20.5 ma). Check the setting and the adjustments of the current output. 5.7.3. Two possibilities of the adjustment 1. Current output: linear The current varies from 4 to 20mA as level changes. Table 5.8 Current Output Adjustment (Linear) # VH Inputs Text 1 V8H1 e.g. 0 H Current output 0: linear 4 20 ma 1: linear 4 20 ma with 4 ma threshold 2 V0H5 e.g. 10 % H Level for 4 ma 3 V0H6 z. B. 90 % H Level for 20 ma 4 V0H4 e.g. 20 s H Integration time 5 V0H7 e.g. 1 H Output on disturbance 0: 10 % 1:+ 110 % 2: HOLD (retain last measured value) Filling ht. BD V0H6 90% 4 ma V0H5 10% 20 ma Page 19
2. Current Output: Digital The current value of 4 and 20 ma (or 8 and 16 ma) for switching and automatic level. Table 5.9 Current Output Adjustment (Digital) # VH Input Text 1 V8H1 e.g. 2 H Current output 2: digital 4/ 20 ma 3: digital 8/ 16 ma 2 V0H5 e.g. 10 % H Switch point min. 4 or 8 ma 3 V0H6 e.g. 90 % H Switch point max. 20 or 16 ma 4 V0H4 z. B. 10 s H Integration time 5 V0H7 e.g. 1 H Output on error: 0: 10 % 1: +110 % 2: HOLD (retain last measured value) Filling ht. BD V0H6 90% V0H5 10% 4 ma 20 ma 8 ma 16 ma Page 20
5.8. Echo Quality The echo quality of ultrasonic signal is given out in V3H2 in steps from 1 10 and displayed in matrix fields V0H8 and V0H9 via a bargraph display. Bad echo quality through: Steam, dust, high temperature, foam, larger measuring distance, etc. No impairment of the echo with smooth liquid surface: 5.8.1. Place the sensor Use the echo quality display (via bargraph) during mounting process, in order to find the correct mounting location. Fixed mountings, which look too far into the detection range of the sensor, reflect the echo. If an unwanted signal is detected e.g. during mounting, another location can be selected or the noise-echo may be suppressed. Page 21
5.8.2. Noise Echo Suppression The noise echo suppression feature is useful if, instead of the actual level, obstructions inside the container are detected. Up to three, noise echo signals can be suppressed. The suppression should be attempted when the tank is empty or as near empty as possible. Echo Step 1 Step 2 1.2 m max. 3 Noise-echo 3 m Good echo Distance Table 5.10 # VH Input Text 1 V0H8 Indicates the distance to the false echo. Wait until a stable value is displayed. 2 V3H0 e.g. 3.000 H Known distance of the medium's surface level (e.g. 3 m) Note for 2- wire: Wait for approx. 40 s 3 V0H8 Meas. distance approx. 3 m? YES Fixed target is faded out NO Repeat procedure Page 22
5.9. Additional Input Possibilities 5.9.1. Temperature The current temperature at the sensor is shown in V3H5. Temperature upper-limit Exceeding of the upper temperature limit of 80 C will be indicated in field V3H5 by storing the value above 80 C. 5.9.2. Echo loss - delay time The input of a delay time in V8H3 delays an alarm due to short term echo loss (e.g. by foam). For normal level measurements, the delay time should not be selected smaller than 30 s. # VH Input Text 1 V8H3 e.g. 80 H The measuring point reacts only after 80 s on the echo loss and switches the alarm E 641. Factory setting: 60 s Selectable: 0 255 s Page 23
5.9.3. Actual Level: A false level reading in V0H9 (e.g. through temperature changes or material stratification) can be corrected by inputting the actual level in V3H1. The input of an actual level automatically corrects the alignment. 5.9.4. First echo factor In containers with strongly rounded off covers (arched covers) double echoes may the generated, which result in the display of a much lower level. By setting the first echo factor to»maximum«, double echoes can be switched off. # VH Input Text 1 V3H4 2 H First echo factor maximum 5.10. Simulation and Function Test Simulation offers the possibility to simulate and test the functions of the unit. Error and Warning in V9H0 E613: Display during the duration of simulation. After termination of the simulation, return to the normal measuring operation. Simulation off: V9H6: 0 In case of a power failure, the device returns automatically into normal measuring operation! Table 5.11 Simulation and Function Test Height Simulation # VH Input Text 1 V9H6 1 H Simulation height 2 V9H7 e.g. 2.000 H Simulated height (e.g. 2 m) 3 V9H8 V0H0 Display current (also appears on bargraph) Display height or level or volume 4 V9H6 0 H Simulation off Current Simulation # VH Input Text 1 V9H6 3 H Simulation current 2 V9H7 e.g. 14 H Simulated current (e.g. 14 ma) 3 V9H8 Display current (also appears on bargraph) 4 V9H6 0 H Simulation off Page 24
Volume Simulation # VH Inputs Text 1 V9H6 2 H Simulation of Volume 2 V9H7 e.g. 100.0 H Simulated Volume (e.g. 100 l) 3 V9H8 V0H0 Display current (also appears on bargraph) Display volume (if no linearization curve is entered, volume corresponds to filling level.) 4 V9H6 0 H Simulation off 5.11. Interlocking After inputting all the parameters, the matrix can be locked. " Interlocking the matrix by entering a three-digit code number of any value other than 333 in V9H9: # VH Input Text 1 V9H9 e.g. 332 H Interlock 2 In V9H9 appears 332. All matrix fields other than V9H9 are blocked. Unlocking the matrix by entering the value 333 in V9H9: # VH Input Text 1 V9H9 333 H Unlock 2 In V9H9 appears 333. The blocking of matrix fields is removed. Page 25
# Interlocking via the keypad P = Protect - + V H F = Free - + V H Note! By interlocking via the keypad, the programming through the keypad or display is blocked. Matrix positions can be displayed but cannot be accessed. Removal of blocking is possible only through the keypad. Page 26
5.12. Adjustment of the LED Display (when equipped) Note! Before the adjustment of the LED display, the analog output must be adjusted first. In case of subsequent programming modifications that would affect the output signal, it is likely that the display would need to be readjusted. If the current output is not used, the output must be jumpered with a 250-ohm resistor to allow for display operation. Loosen and remove the four cross-slotted screws then remove the display cover plate. Key 1 Key 2 Key 1: Key 2: Keys 1+2 : Downward and selection of Menu Upward and selection of Menu Enter menu selection for adjustment or quit adjustment mode 5.12.1. Decimal point Press key 2 until: " dp " is displayed. Press key 1+2: Enter menu for adjustment: " ---.- " Press key 2 or 1: for up and down: " --.-- " Press key 1+2: Quit adjustment mode and return to Menu " dp " 5.12.2. Zero point (value to be displayed at 4 ma) Press key 2 until: " ZP 4 " is displayed. Press key 1+2: Enter menu for adjustment; " 0.00 e.g.: (0.0 Liters) Press key 2 or 1: for up and down Press key 1+2: Quit the adjustment mode and return to Menu " ZP 4 " 5.12.3. End point (value to be displayed at 20 ma) Press key 2 until: " EP20 is displayed. Press key 1+2: Enter menu for adjustment: " 0.00 " Press key 2 or 1: for up and down: " 60.00 " e.g.: (60 Liters) Press key 1+2: Quit the adjustment mode and return to Menu "EP20" Page 27
5.12.4. Damping Press key 2 until: " FILt " is displayed. Press key 1+2: Enter menu for adjustment: " 0.3 " (min. = 0.3 sec.; max. = 20.0 sec.) Press key 2 or 1: for up and down: " 1.5 " (1.5 sec.) Press key 1+2: Quit the adjustment mode and return to Menu " FILt " 5.12.5. Range Exceeded (indication if below 4 ma or above 20 ma) Indicates " HI " if the upper limit or " LO " if the lower limit is exceeded Press key B until: " HILO " is displayed. Press key 1+2: Enter menu for adjustment: " off " = indication inactive Press key 2 or 1: for up and down: " on " = indication active Press key 1+2: Quit the adjustment mode and return to Menu " HILO " Indication: " HI "= Current exceeds the upper limit of the measuring range (I > 20 ma), " LO "= Current is below the lower limit of the measuring range (I < 4 ma) Caution: When the "HILO" indication is inactive, exceeding the upper limit of the display range (-1999...+9999) results in the error code "Er06" being displayed. 5.12.6. Return to Measuring Mode Depending upon the selected menu point, press Key 1 or 2 from one to eight times. Page 28
6. Errors and Warnings 6.1. Diagnostics and Error Elimination The electronics differentiate between an error and warning during operation. 2-wire: Electronics detect an error bargraph flashes within the digital display current output takes the selected value ( 10 % = 3.8 ma, +110 %, HOLD) an error-code in V9H0 is given out Electronics detect a warning unit continues to measure an error-code in V9H0 is given out 4-wire: Electronics detect an error red LED lights up bargraph flashes within the digital display current output takes the selected value ( 10 % = 2.4 ma, +110 %, HOLD) an error-code in V9H0 is given out Electronics detect a warning red LED flashes unit continues to measure an error-code in V9H0 is given out Page 29
6.2. Error Codes Code Type Cause and Elimination E 101 Error Checksum error EEPROM/ FRAM call Kobold E 102 Warning Checksum error EEPROM/ FRAM call Kobold E 103 Warning Initialization begins. If error persists, initialization cannot be started. E 106 Error Download in progress Wait, until the process is complete. E 110 E 121 Error Execute Reset. If error persists, electronic device error call Kobold E 116 Error Error during Download Press Reset, or start a new Download with corrected data. E 125 Error Sensor failure Check sensor connection. If error persists, call Kobold E 261 Error Error in temperature sensor (interruption) call Kobold E 501 Error Sensor electronics stops detection call Kobold E 602 Warning Linearization curve does not rise continuously Check with manual linearization curve. Does the volume increase with the filling height? E 604 Warning Linearization curve consists of less than 2 points Check manual linearization curve and provide with additional points. E 605 Error Linearization table not available appears during input of linearization curve. Activate all points after inputting linearization curve. E 613 Warning Simulation On After running simulation, switch to normal measuring operation. Simulation Off: V9H6: 0 E 620 Warning Current out of nominal range Check alignment and adjustments of current output. E 641 Error No echo to be evaluated Short time echo loss e.g. due to foam or during start up. Check alignment and operating voltage. If the error persists, call Kobold E 661 Warning Temperature on sensor too high (more than 80 C) Check Measuring conditions. Page 30
7. Dimensions Page 31
8. Error Analysis Error Analog output Possible cause Remedy Measured value jumps sporadically on constant level and turbulent liquid surface or if the stirring fans run. 20 ma Signal is affected by turbulent liquid surface or stirring fans? Increase the Integration time While stirring fans are within measuring range, check sensor position. expected occurs Relocate the sensor. Choose application parameter 0 or 2 in V0H3 4 ma t With constant level, the measured value jumps to a lower value or remains too low constantly. 20 ma Multiple echoes? Choose application parameter 2 in V0H3 Choose larger first echo factor 1 or 2 in V3H4 expected occurs 4 ma t Page 32
Error Analog output Possible causes Remedy Digit-segment flashes Measured value in V0H0 too low Reaction of current output depends upon adjustment in V0H7 V0H7= 0 10 % 2.4 ma or 3.8 ma V0H7= 1 110 % 22 ma V0H7= 2 HOLD last value is retained D m/ft (V0H8) 20 ma expected Error code in V9H0 E641 in V9H0 Echo too weak or foam on surface Distance D in V0H8 too large? Which error code? Proceeding further depends on error code. Check sensor position. Adjust the sensor mounting position. Multiple echoes? Gas-accumulation over surface. Check sensor position. Adjust the sensor mounting position. Linearization wrong? Enter a new linearization curve. occurs Measured value in V0H0 too large D m/ft (V0H8) 4 ma t 20 ma occurs Current output wrong? Distance D in V0H8 too small? Check values in V0H5 and V0H6 and possibly input new values. Noisy installation in measuring range. Check standpipe dimensions. Check sensor position. Adjust the sensor mounting position. Select parameter 0 or 2 in V0H3. Execute false echo fade out. expected Linearization wrong? Enter a new linearization curve. 4 ma t Current output wrong? Check values in V0H5 and V0H6 and possibly input new values. Page 33
9. V-H Setup Matrix NUS H0 H1 H2 H3 H4 H5 H6 H7 H8 H9 Basicsettings V0 Meas. value User's unit Adjustment»Empty«m/ft Adjustment»Full«m/ft Application 0: Liquid 1: Quick change 2: Arched cover 3: Rough solids 4: Conveyer belt. Integration time 0 255 s Default: 3 s Seconds Value for 4 ma Default: 0 % Switching point for 4 ma 8 ma Value for 20 ma Default: 100 % Switching point for 20 ma 16 ma Current output with error 0: 10 % 2- wire.: 3.8 ma 4- wire.: 2.4 ma 1: +110 % 2: HOLD Meas. distance Bargraph = Echo-quality m/ft Filling height Bargraph = Echo-quality m/ft V1 Linearization V2 Linearization 0: Height 1: Tab. Activate 2: manual input 3: volumetric 4: delete 5: linear Linearizationtable line No. Linearizationtable Filling height m/ft Linearization - table Volume User's unit Volume full-scale value Default: 100.0 User's unit Extended settings V3 False echo fade out Default: 0.000 Actual level: Default: 0.000 Echo-quality 0 10 First echo factor 0: none 1: middle 2: max. Temperature C V4 V7 Op. Param. V8 Current output 0: linear 4 20mA 1: linear with 4mA threshold 2: digit. 4/ 20mA 3: digit. 8/ 16mA m/ ft Switch-over 0: m 1: ft Echo-loss time-delay 0 255 s Default: 60 s Seconds Service/ Simulate V9 Error status current error Error status last recovered error Sensor / electronics detection Unit and Software detection Reset 333 Simulation 0: Current 1: Height 2: Volume 3: Current Simulation value Current output Lock values Locked <>333 unlocked = 333 Display field Input field Factory-set values in bold font Page 34
10. Quick Meter Setup for Normal Applications: Overview Reset 1. Reset unit V9H5 Input: 333 2. Measuring unit V8H2 Input: 0: m 1: ft 3. Align Empty V0H1 Input: E (m/ ft) 4. Align Full V0H2 Input: F (m/ ft) 5. Application V0H3 Input: (0 4) O: Liquid 1: Quick level-change 2: Dome cover 3: Bulk solids 4: Conveyer-belt allowance Page 35
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CAUTION PLEASE READ THE FOLLOWING WARNINGS BEFORE ATTEMPTING INSTALLATION OF YOUR NEW DEVICE. FAILURE TO HEED THE INFORMATION HEREIN MAY RESULT IN EQUIPMENT FAILURE AND POSSIBLE SUBSEQUENT PERSONAL INJURY. Page 37
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User's Responsibility for Safety: KOBOLD manufactures a wide range of process sensors and technologies. While each of these technologies are designed to operate in a wide variety of applications, it is the user's responsibility to select a technology that is appropriate for the application, to install it properly, to perform tests of the installed system, and to maintain all components. The failure to do so could result in property damage or serious injury. Wiring and Electrical: Section 2.0, Specifications and Section 4.0, Electrical Connections, provide the voltage and current limitations and the wiring for the various sensor types. The sensor electrical ratings should never be exceeded. Electrical wiring of the sensor should be performed in accordance with all applicable national, state and local codes. Operating Temperature: Section 2.0, Specifications, provides the operating temperature limits for each model. Operation outside these limitations will cause damage to the unit and can potentially cause personal injury. Material Compatibility: Section 2.0, Specifications, provides the materials of construction for the display/controller. Make sure that the model that you have selected is chemically compatible with its operating environment. While the meter is both liquid and spray resistant when installed properly, it is not designed to be immersed. Flammable, Explosive and Hazardous Applications: The NUS series is not an intrinsically safe or explosion-proof design. They should not be used in installations in which an intrinsically safe or explosion-proof design is required. Make a Fail-safe System: Design a fail-safe system that accommodates the possibility of device or power failure. In critical applications, KOBOLD recommends the use of redundant backup systems and alarms in addition to the primary system. Page 39