Flow Swich S Volumeric flow swiching Almos no effec from differing viscosiies Versaile, configurable swiching oupu in push-pull design Robus consrucion Compac design Characerisics he VHZ gearwheel flow meer measures he flow by a volumeric principle, in which a pair of gearwheels is moved proporional o he flow rae. he movemen of he gearwheels is measured hrough he enclosing housing wall by a sensor. he devices are suiable for viscous, fluid, self-lubricaing media, as well as for aqueous fluids such as soaps, pass, emulsions ec. which have a non-abrasive characer. Because of he volumeric funcioning principle, he devices are almos compleely independen of viscosiy. he LABO elecronics fied o he device make available an elecronic swiching oupu (push-pull) wih adjusable characerisics (minimum/maximum) and hyseresis, which responds when an adjusable limi is fallen shor of or exceeded. If desired, he swiching value can be se o he currenly exising flow using "eaching". Models wih analog or pulse oupu are also available (see separae daa shees). echnical daa Sensor gearwheel volumeer Nominal widh DN 8..25 Process female hread G 1 / 4..G 1 connecion Swiching ranges 0.02..150 l/min for deails, see able "Ranges" Measuremen accuracy ±3 % of he measured value in he specified meering range (measured a 20 mm²/s) Repeaabiliy ±0,3 % Medium emperaure -25..+80 C opionally -25..+120 C Ambien -20..+70 C emperaure Pressure resisance see able "Pressure resisance and weigh" Pressure loss see upsream page "Funcion and benefis - volumeric, gearwheel" Maerials see able "Maerials" medium-conac Maerials, nonmedium-conac Sensor ube CW614N nickelled Adhesive Epoxy resin Flange bols sainless seel Supply volage 10..30 V DC Power < 1 W (for no-load oupu) consumpion Swiching oupu ransisor oupu "push-pull" (resisan o shor circuis and polariy reversal) l ou = 100 ma max. Display yellow LED (On = Normal / Off = Alarm / rapid flashing = Programming) Elecrical for round plug connecor M12x1, 4-pole connecion Ingress proecion IP 67 Weigh see able "Pressure resisance and weigh" Conformiy CE Pressure resisance and weigh G ypes PN Housing maerial Weigh bar kg G 1 / 4 008GA 200 Aluminium 0.5 G 1 / 4 008GK 160 sainless seel 1.5 G 3 / 8 010GA 200 Aluminium 0.5 G 3 / 8 010GK 200 sainless seel 1.5 G 3 / 4 020GA 200 Aluminium 1.6 G 3 / 4 LABO-VHZO-020GA 100 Aluminium / glass 1.6 G 1 025GA 100 Aluminium 6.3 Ranges Meering range ypes Pulse volume (= resoluion) l/min cm³ 0.02.. 2 008 0.04 0.10.. 6 010 0.20 0.50.. 50 LABO-VHZ(O)-020 2.00 3.00.. 50 025 5.22 pi-ho_fza-labo-vhz-s_e V1.01-01 1
Maerials 008..025GA 008GK 010..025GK Housing Al anodised sainless seel sainless seel 1.4404 1.4404 gearwheel and sainless seel sainless seel sainless seel Axis Bearing Iglidur X sainless Iglidur X seel 1.4037 / 1.4 016 /PVD-c oaed Seal FKM FKM FKM Sigh glass glass (only wih VHZO) Dimensions 008 Wiring 1 2 3 4 brown whie blue black Z=Load Z Z 10..30 V DC programming 0 V swiching oupu Connecion example: PNP NPN 2 3 1 4 010 Before he elecrical insallaion, i mus be ensured ha he supply volage corresponds o he daa shee. I is recommended o use shielded wiring. 2 pi-ho_fza-labo-vhz-s_e V1.01-01
020 Handling and operaion Insallaion he VHZ flow measuremen device can be insalled anywhere in he pipework sysem. A run-in secion is no required. he direcion of flow may be freely chosen. I should be ensured ha no dir paricles (hread cuing swarf) can ge ino he flow space, as his could cause he blockage of he gearwheels. I may herefore be necessary o insall filers upsream of he flow measuremen device (mesh size 30 µm). Noe he swiching value can be programmed by he user via "eaching". If desired, programmabiliy can be blocked by he manufacurer. he ECI-1 device configuraor wih associaed sofware is available as a convenien opion for programming all parameers by PC, and for adjusmen. Operaion and programming he swiching value is se as follows: Apply he flow rae o be se o he device. Apply an impulse of a leas 0.5 seconds and max. 2 seconds duraion o pin 2 (e.g. via a bridge o he supply volage or a pulse from he PLC), in order o accep he measured value. When he eaching is complee, pin 2 should be conneced o 0 V, so as o preven uninended programming. 025 he device has a yellow LED which flashes during he programming pulse. During operaion, he LED serves as a saus display for he swiching oupu. In order o avoid he need o ransi o an undesired operaing saus during he each-in, he device can be provided ex-works wih a each-offse. he each-offse poin is added o he currenly measured value before saving. he offse poin can be posiive or negaive. Example: he swiching value should be se o 80 l/min. However, i is possible only o reach 60 l/min wihou problems. In his case, he device would be se using a each-offse of +20 l/min. A a flow rae of 60 l/min in he process, eaching would hen sore a value of 80 l/min. he limi swich can be used o monior minimal or maximal. Wih a minimum-swich, falling below he limi value causes a swichover o he alarm sae. Reurn o he normal sae occurs when he limi value plus he se hyseresis is once more exceeded. Min+Hys Min pi-ho_fza-labo-vhz-s_e V1.01-01 3
Wih a maximum-swich, exceeding he limi value causes a swichover o he alarm sae. Reurn o he normal sae occurs when he measured value once more falls below he limi value minus he se hyseresis. Max Max-Hys A swichover delay ime ( DS) can be applied o he swichover o he alarm sae. Equally, one swich-back delay ime ( DR) of several can Max Max-Hys DS be applied o swiching back o he normal sae. In he normal sae he inegraed LED is on, in he alarm sae i is off, and his corresponds o is saus when here is no supply volage. In he non-invered (sandard) model, while in he normal sae he swiching oupu is a he level of he supply volage; in he alarm sae i is a 0 V, so ha a wire break would also display as an alarm sae a he signal receiver. Opionally, an invered swiching oupu can also be provided, i.e. in he normal sae he oupu is a 0 V, and in he alarm sae i is a he level of he supply volage. non-invered oupu invered oupu DR Ordering code he base device is ordered, e.g. VHZ-008GA002E wih elecronics, e.g. OMNI-VHZ-008IPLO 1. 2. 3. 4. 5. 6. VHZ- G E 7. 8. 9. 10. 11. 12. 13. S S =Opion 1. Sigh glass - no sigh glass O- wih sigh glass 2. Nominal widh 008 DN 8 - G 1 / 4 010 DN 10 - G 3 / 8 020 DN 20 - G 3 / 4 025 DN 25 - G 1 3. Process connecion G female hread 4. Body maerial A aluminium K sainless seel 5. Ranges 002 0.02.. 2 l/min 006 0.10.. 6 l/min 050 0.50.. 50 l/min 150 3.00..150 l/min 6. Connecion for E elecronics 7. For base device 008 VHZ-008G...E 010 VHZ-010G...E 020 VHZ(O)-020G...E 025 VHZ-025G...E 8. Swiching oupu (Limi swich) S push-pull (compaible wih PNP and NPN) 9. Programming N canno be programmed (no eaching) P programmable (eaching possible) 10. Swiching funcion L minimum-swich H maximum-swich 11. Swiching signal O sandard I invered 12. Elecrical connecion S for round plug connecor M12x1, 4-pole 13. Opion H medium emperaure max. 120 C (wih 300 mm cable) A Power-On-Delay funcion (ordered as a separae opion) makes i possible o mainain he swiching oupu in he normal sae for a defined period afer applicaion of he supply volage. 4 pi-ho_fza-labo-vhz-s_e V1.01-01
Opions Swiching delay period (0.0..99.9 s). s (from Normal o Alarm) Swich-back delay period (0.0..99.9 s). s (from Alarm o Normal) Accessories Cable/round plug connecor (KB...) see addiional informaion Accessories Device configuraor ECI-1 Power-On delay period (0..99 s) (afer connecing he supply, ime during which he oupus are no acuaed) Swiching oupu fixed a s l/min Swiching hyseresis % sandard = 2 % of he meering range each-offse % (in percen of he meering range) sandard = 0 % Furher opions available on reques. pi-ho_fza-labo-vhz-s_e V1.01-01 5