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AccuFlo

®

Zero 

– Installation and Operating Instructions 

 

 

 

 

 

 

Installation and operating instructions AccuFlo

®

Zero 

 

1.4  Special warnings 

Exceeding  pressure: 

Appropriate  measures  are  to  be  taken  to  secure  that  the  allowed  operation  pressure 

according to the stamp on the type plate is not exceeded. 

Normal usage: 

On acceptance and within the required control intervals, a compression test under overpressure 

and a leakage test have to be conducted for the whole system. 

Exceeding  or  underrunning  of the  allowed  operation  temperature  limits: 

Appropriate measures  are  to be 

taken to secure that the allowed operation temperature limits are not exceeded. 

Damage: 

Please observe that the product is not dropped and that it is not affected by excess forces. 

Too many load cycles: 

Appropriate measures are to be taken to secure that the allowed number of load cycles 

is not exceeded. The maximum load cycles are defined in EN 13480-3; 10.2 c). 

Opening under pressure: 

Appropriate measures are to be taken to secure that the valves of the product are 

not opened under pressure. 

Fire  near  the  product: 

Appropriate  measures  are  to  be  taken  to  secure  that  the  product  is  taken  out  of 

operation in case of damage. 

Improper  mounting  of  the  flow  computer: 

Please  observe  that  the  several  components  of  the  product  are 

mounted properly. 

Improper mounting of the device: 

Please observe that the device is mounted properly. 

Assembling  of  pieces  of  equipment,  valves  etc.: 

In  case  of  assembling  of  pieces  of  equipment  and  when 

starting  the  working  load,  the  pressure  devices  shall  not  be  exposed  to  any  loads  which  may  endanger  the 
operating safety. Especially, additional static and dynamic loads are not allowed. 

Welding  of  pieces  of  equipment: 

Please  observe  that  no  welding,  heat  treatment  or  other  interventions 

concerning the safety are carried out. Necessary reparations have to be approved by the manufacturer. 

Corrosion: 

Please observe that the product is used and installed as intended. 

Electricity: 

Caution of voltage! Switch off the device before interfering in the wiring.

 

Other  risks: 

Please  observe  that  the  operation  instructions  of  the  manufacturer  are  respected  at  all  times. 

Especially, pressure devices have to be used for the specified media. 

 

 

 

Summary of Contents for AccuFlo Zero

Page 1: ...AccuFlo Zero Automatic Zero Point Calibration For Differential Pressure Transmitters Installation and Operating Instructions...

Page 2: ...ctions 8 5 3 Status relay 9 5 4 Manual zero point calibration 9 5 5 Terminal assignment 9 6 Commissioning 13 6 1 General procedure 13 6 2 Successful set up 13 6 3 Optional correction of positioning wi...

Page 3: ...ce may lead to serious injury and or considerable damage to property 1 2 Qualified personnel The installation and operating must be realized by qualified personnel Qualified personnel includes persons...

Page 4: ...es of the product are not opened under pressure Fire near the product Appropriate measures are to be taken to secure that the product is taken out of operation in case of damage Improper mounting of t...

Page 5: ...l if the transmitter supports the necessary functions via HART The automatic zero point calibration is executed directly in the transmitter analog to a manual calibration with a possible present local...

Page 6: ...f supply for the following items AccuFlo Zero AccuFlo Zero 1 AccuFlo Zero 2 Threaded rods and screw nuts 7 16 UNF or M10 according to the transmitter for assembling of the system 3 PTFE seals for the...

Page 7: ...n case of measurement of liquids or steam the two locking screws without valve see above in Figure 1 Assembled AccuFlo Zero are to be replaced by the delivered locking screws with valve bleeder valve...

Page 8: ...cribed Power supply o The AccuFlo Zero needs a voltage supply of 24 V DC with a power rating of at least 2 1 ampere o We recommend a switch mode power supply o We recommend positioning the power suppl...

Page 9: ...ent loop is fixed and shown statically during this period Both relays may be connected in series in the AccuFlo Zero and provide a group signal A 1 signal is only sent if the AccuFlo Zero is switched...

Page 10: ...inal Terminal in transmitter Use A4 Differential pressure transmitter 4 20 mA D2 Connection between the AccuFlo Zero and the control station Table 3 Analog signal to the control station Terminal Descr...

Page 11: ...tputs option 3 Terminal Description Use E2 external Externally supplied signal E3 Calibration Signal Calibration of the manually supplied signal after successful zero point calibration E4 Calibration...

Page 12: ...Zero If necessary external triggering of the zero point calibration Table 8 Signal start zero point calibration from the control station to the AccuFlo Zero Terminal Description Use D4 GND GND of the...

Page 13: ...in the pipe system is stopped and there is no flow 2 Ensure that the system differential pressure transmitter AccuFlo Zero manifold impulse pressure lines and the condensate vessels are filled with wa...

Page 14: ...sult without positioning correction 6 5 Signaling to the control station Status information may be transmitted from the AccuFlo Zero to the control station Two relays are available For more informatio...

Page 15: ...entional power supply with classical transformer A substitution is recommended o Shielded wires may decrease the influence of external interference Connect the shield only one sided with the ground po...

Page 16: ...elements pitot tubes v cones etc Process and signal connection Material of wetted parts Stainless steel 1 4571 Process connection manifold IEC 61518 DIN EN 61518 Groove 18 5 mm Process connection tran...

Page 17: ...0 mA Supply of the transmitter Provided Digital communication HART Maximum wire length between AccuFlo Zero and transmitter 5 m Outputs Output signal Two wire interface 4 20 mA Maximum wire length bet...

Page 18: ...AccuFlo Zero Installation and Operating Instructions 18 Installation and operating instructions AccuFlo Zero 10 Declaration of Confirmity...

Page 19: ...AccuFlo Zero Installation and Operating Instructions 19 Installation and operating instructions AccuFlo Zero...

Page 20: ...on GmbH Postfach 41 01 31 D 41241 M nchengladbach Hanns Martin Schleyer Str 22 D 41199 M nchengladbach Tel 49 0 2166 62317 0 Web www ski gmbh com E Mail info ski gmbh com Registered trademarks and log...

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