Positive Displacement Flow sensors

Transcription

1 JJ Series VZGG JJ Series VZVA JJ Series VZAL JJ Local displays TD5 Positive Displacement Flow sensors DS_Positive_displacement_flow_sensors / 153

2 Positive displacement flow sensors Gearwheel type flow sensors record volume flows of liquids with both high and changing viscosities. The high-precision sensors work according to the displacement principle. The high resolution combined with reliable measurement accuracy make the sensors especially useful for applications involving the measurement of small and very small volumes. In principle, the measurement accuracy is increased for high viscosities. Conversely, the measurement accuracy is lower with a viscosity of less than mm²/s. Due to their construction, gearwheel type flow sensors require a certain lubricity of the fluid beeing measured. Operation with non-lubricating media, e.g. water, is not possible. Applications Consumption measurement Control of filling operations Dosage of oils and chemicals Flow measurement of paints and varnishes Ratio control of polyol and isocyanate Principle of operation A very precisely adjusted gear pair within the casing forms the measuring element. The inflowing medium causes the gear pair to rotate. The rotary motion is scanned by contactless sensors. Since each individual tooth generates a pulse, this results in a very high resolution. Consequently, even the smallest volumes can be measured or dosed precisely. The measurement unit contains two pick-offs that are circumferentially offset by ¼ of a tooth pitch to generate a channel flow-proportional frequency signal. Suitable processing of the signal provides an greater resolution and the option to identify the flow direction. The maximum pressure drop should not exceed 1 bar. This limits the measurement range of high viscosity media (see pressure drop diagrams). Basically, the measurement accuracy increases with increase in viscosity of the media Housing bottom Housing cover 3 Gear wheels Pre-amplifier 5 Connection plug Pick-offs 7 Bearing 1 Measurement chamber 7 15

3 Overview of performance features of the VZGG / VZVA / VZAL VZGG / VZVA VZAL Housing Ductile iron or stainless steel Aluminium Viscosity of medium 1... mm²/s 1... mm²/s (depending on the model) Temperature of medium C (standard) -... C Measuring accuracy ±.3 % of reading ± % of reading Sizes Process connection Via subplate with lateral female thread connection Direct female thread Additional performance features of the VZGG / VZVA Additional performance features of the VZAL The measuring volume per pulse determines the size, e.g.. cm³/pulse for VZ...-S HT version for temperatures up to 15 C with thermally insulated preamplifier (option) Intrinsically safe explosion-proof versions available in accordance with ATEX (max. medium temperature C) Variety of casing and sealing materials, meaning they can be universally used for different measurement media Standard process connection via connecting plates, so they can be replaced quickly without lengthy interruptions to the process Other bearings for special requirements on request Standard process connections Output signal: pulse signal 155

4 Positive displacement flow sensors Series VZGG, VZVA Type VZGG Type VZVA Type VZ.5 VZ. VZ.1 VZ. VZ. VZ1 VZ3 VZ5 Size Start of gear wheel rotation [l/min] Measuring range* [l/min] Geometric gear volume [cm³] Measuring volume [ml/pulse] Resolution [Pulse/l] * For media with high viscosity the measuring range is reduced. The max. pressure drop shouldn t exceeded 1 bar (see pressure drop diagrams). 15

5 Technical data Measuring accuracy Repeatability Viscosity of medium Pressure rating Medium temperature range (depends on sealing material) Standard Without preamplifier (for TD5) High temperature Ex version ±.3 % of reading (1 mm²/s) <.1 % under same conditions 1... mm²/s VZ.5... to VZ max. bar VZ 3... to VZ max. 315 bar Higher pressure rating on request FKM FEP EPDM C C C... C... C... C C C C C C C Ambient temperature range (depends on sealing material) FKM FEP EPDM C C C Process connection Power supply Electrical connection Degree of protection EN 59 Output signal Via subplate with lateral female thread connection VDC / max. 9 ma Via standard socket IP5 -channel, squarewave, pulse duty ratio 1:1, PNP Options For type VZVA On request Direct Process connection 157

6 Typical pressure drop VZ,5 Typical pressure drop VZ, ,5 1 1,5,,5 1 1,5,5 3 3,5 Typical pressure drop VZ,1 Typical pressure drop VZ,

7 Typical pressure drop VZ, Typical pressure drop VZ l/min Typical pressure drop VZ Typical pressure drop VZ l/min 3 159

8 VZGG 7 Standard version and Ex version H G F G S D A Material Housing Ducitile iron EN-GJS--15 Gear wheels Steel Bearings Ball bearings Seals Standard: FKM Option: EPDM, FEP High temperature version Type VZ.5GG VZ.GG VZ.1GG VZ.GG VZ.GG VZ1GG VZ3GG VZ5GG A [mm] D [mm] F [mm] GS [mm] GH [mm] Weight [kg]

9 VZVA 7 Ø C A H F G S B ØP Ø D Standard version and Ex version * For direct porcess connection G H Material Housing Stainless steel 1. Gear wheels Stainless steel 1. Bearings Ball bearings stainless steel Seals Standard: FKM Option: EPDM,FEP High temperature version Type VZ.5VA VZ.VA VZ.1VA VZ.VA VZ1VA VZ3VA VZ5VA D [mm] F [mm] GS [mm] GH [mm] Weight [kg] Direct process connection A [mm] G⅛ G¼ G⅜ G⅜ G½ G 1 G 1 B [mm] C [mm] H [mm]

10 Subplates for VZGG For type VZ.5GG / VZ.GG / VZ.1GG / VZ.GG VZ.GG VZ1GG VZ3GG / VZ5GG A [mm] 5 1 B [mm] C [mm] c [mm] d [mm] E [mm] 5 1 e G⅜ G½ G½ G 1 F [mm] f [mm] G [mm] H [mm] J [mm] K [mm] 7 L [mm] M [mm] 35 5 N [mm] P [mm] M /1t M /1t M /1t M 1/t R [mm] Weight [kg] Material Ductile iron EN-GJL-5 Ductile iron EN-GJL--15 Ductile iron EN-GJL-5 A E K P f B F L M øh R C J N e d X c øg View X 1

11 Subplates for VZVA For type VZ.5VA / VZ.VA / VZ.1VA / VZ.VA VZ1VA VZ3VA / VZ5VA B [mm] C [mm] D [mm] 9 1 E [mm] 75 1 e G⅜ G½ G1 f [mm] G [mm] H [mm] J [mm] K [mm] 7 L [mm] 7 95 M [mm] 35 5 N [mm] P [mm] M /1t M /1t M 1/t R [mm] Weight [kg] Material Stainless steel 1. ø D E P C J ø H L M B ø G e f N R K 13

12 Order code Example VZ5 GG V 3 I S Type VZ.5 VZ. VZ.1 VZ. VZ. VZ1 VZ3 VZ5 Material Ductile iron Stainless steel Seals FKM EPDM FEP Power supply Size (only ductile iron) VZ5 VZ VZ VZ VZ VZ VZ3 VZ VDC 3 Process connection Via subplates Direct (only for stainless steel) Preamplifier Integrated Without preamplifier, for TD5 (not for Ex-version) Isolated for high temperature version (not for Ex-version) Version Standard Ex-version GG VA V E P 1 I K E S S Order code Example AP GG 3S Subplates appropriate to VZ.5 / VZ. / VZ.1 / VZ. VZ. (only ductile iron) VZ1 VZ3 / VZ5 Material Ductile iron Stainless steel AP AP AP AP5 GG VA 3S 1S 1S S 1

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14 Positive displacement flow sensors Series VZAL Type VZ.AL Type VZAL 1

15 Technical data Type VZ.AL VZ.AL VZAL VZ5AL Size.. 5 Measuring range*... l/min l/min l/min 1... l/min Viscosity of medium... mm²/s mm²/s... mm²/s... mm²/s Measuring accuracy ± % of reading ±1 % of reading ±.5 % of reading ±1 % of reading Repeatability Up to.5 % under same conditions Pressure rating Max. bar Max. 1 bar Max. 1 bar Max. bar Pressure peaks Max. bar Max. bar Max. bar Max. bar Medium temperature range -... C integrated preamplifier... C without preamplifier (for TD5) Thread connection G¼ G⅜ G¾ G 1 Weight.5 kg.7 kg 1.9 kg kg Volume per pulse. cm³.5 cm³ cm³ 5. cm³ Number of output channels Output signal Signal shape Pulse rate Resolution Indication Square wave, pulse signal, PNP, pulse duty ratio 1:1 ±15 % 5 pulses/l. ml/pulse Cable socket with one LED for pulse signal Square wave, pulse signal, PNP, pulse duty ratio 1:1 ±15 % 1.3 pulses/l.5 ml/pulse Cable socket with two LED for pulse signal (two channels) Square wave, pulse signal, PNP, pulse duty ratio 1:1 ±15 % 5 pulses/l ml/pulse Cable socket with one LED for pulse signal Square wave, pulse signal, PNP, pulse duty ratio 1:1 ±15 % pulses/l 5. ml/pulse Cable socket with one LED for pulse signal Electrical Plug connector incl. cable socket connection Power supply V DC reverse polarity protection Power input. W short circuit proof.9 W short circuit proof. W short circuit proof. W short circuit proof Degree of protection EN 59 IP5 * For media with high viscosity the measuring range is reduced. The max. pressure drop shouldn t exceeded 1 bar (see pressure drop diagrams). 17

16 Typical pressure drop VZ,AL Typical pressure drop VZ,AL ,5 1 1,5,5 3 3, Typical pressure drop VZAL Typical pressure drop VZ5AL

17 VZ.AL VZ.AL 7 7 VZAL G¼ Ø 1 11,5 G¼ Ø 1 11, G¾ Ø 3,5 G¼ Ø 1 11,5 1 G¾ Ø 3, VZ5AL 55 G⅜ G⅜ G 1 Ø G 1 G 1 Ø Ø 9 Material 1 Type VZ.AL VZ.AL VZAL VZ5AL Housing Aluminium, gold-colour Aluminium, gold-colour Aluminium AIMgSi F3 Aluminium AIMgSi F3 anodised anodised (hard coated) (hard coated) Gear wheels Stainless steel 1. Steel Steel Steel Bearings Ball bearings Ball bearings Sleeve bearings (P) Ball bearings stainless steel Seals FKM FKM FKM FKM Order code Example VZALV31 IS Type Size VZ.AL, VZALV31 VZ.AL, VZALV31 VZAL VZALV31 VZ5AL 5 VZ5ALV31 Preamplifier Integrated IS Without preamplifier (for TD5) KS 19

18 Accessories Local displays, series TD5 The local display TD5 is simply fitted between the plug connector plug and the cable socket of VZGG, VZVA or VAL positive displacement flow sensors. It is programmable via two buttons which are located behind the front panel. It can be set to display either the actual flow rate or the total volume (counter function), as required. The TD5 is available in three different output signal versions: Type TD5 Pulse output (-channel, depending on flow sensor) Analogue output ()... ma Two alarm contacts It is also easy to retrofit onto existing flow sensors. To do this, merely remove the amplifier board from the cable socket. Technical data Signal input Pulse signal from flow sensor Programming Via buttons, data retention on power off Display Four-digit LED display, red, 7. mm high Power supply VDC, optional...19 VDC Current consumption Max. 1 ma Ambient temperature... C Storage temperature C Output signals Pulse output (-channel, depending on flow sensor) or analogue output ()... ma or alarm contacts max. VDC / 1 A Housing Aluminium, x 35 x (W x H x D) without plug connector Weight Approx. 1 g Degree of IP5 protection EN 59 Electrical connection Plug connector DIN EN A, pin Order code Example ED5F Outpout signals Pulse output Analogue output ()... ma Two alarm contacts ED5F ED5A ED5R Power supply VDC (standard)...19 VDC (option) 5

19 Switch amplifier, series K-13 The switch amplifier K-13 serves as an interface between electrical signals of the hazardous areas to the safe areas. Type K-13 The input signals of positive displacement flow sensors in in Ex-version are transmitted through transistor contacts. The input-, output- and power supply circuits are safe galvanic separated. This unit is approved as associated apparatus. Technical data Temperature ranges Ambient Storage -5 C -5 5 C Humidity Max. 75 % RH Housing For assembly rail setup DIN EN 5 Dimensions 11.5 mm x.5 mm x 99 mm (H x W x D) Declaration of conformity 9/9/EG: CE 15 Field of application EX II () G D, [EEx ia] II C EC-type examination PTB 3 ATEX 9 X Electrical data Signal input Switching points Open circuit voltage Short circuit current Signal output channel frequency signal of positive displacement flow sensors in Ex-version 9 ma 1 1 ma V ma channel, open collector Power supply V AC/DC (± %) Power consumption DC 3. W Mode selection x switch Displays x LED, each Channel power indication, switch status and wire monitoring Order code K-13-ATEX 1