Crowcon 20/20M Operating And Maintenance Instructions Manual Download Page 1

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M070029

Issue 1
January 2014

Crowcon F-Gas Detector

Infra-Red SF

and Refrigerant Gas Detector

Installation, Operating and Maintenance Instructions

Summary of Contents for 20/20M

Page 1: ...M070029 Issue 1 January 2014 Crowcon F Gas Detector Infra Red SF6 and Refrigerant Gas Detector Installation Operating and Maintenance Instructions...

Page 2: ...ng maintenance mode without accepting any changes 12 4 7 Exiting maintenance mode taking over changes 13 4 8 Restoring factory settings 13 4 9 ZERO calibration 13 4 10 SPAN calibration 14 4 11 Informa...

Page 3: ...ers the best prerequisites for reliable and lasting detection is able to detect even the smallest quantities of toxic gases reliably and to report its findings to a connected control system The gas co...

Page 4: ...oltage of 12 to 2 faultless operation is guaranteed within these parameters Supply voltage fluctuations kept as small as possible All connections used for supply and output signals are available from...

Page 5: ...rface PCB Both components form a fixed unit and must not be separated The installation of the transmitter is described as follows Gas detector should be mounted where the gas to be detected is most li...

Page 6: ...ocessing equipment as well as safety and engineering issues The agreement reached on the locations of sensors should be recorded Gently prize open the flaps using a screw driver being careful to not d...

Page 7: ...essure compensation it would lead to inaccuracies in the measurement of the concentration and possibly to faulty data As the ambient pressure must be taken into account when measuring the concentratio...

Page 8: ...n the region of 0 20mA linear to the measuring value Current signal in the region of 4 20mA linear to the measuring value This option also facilitates the easy detection of a broken wire or the failur...

Page 9: ...conditions This complies with the NAMUR NE43 standards range run detection range Detection range run detection range range Use of the voltage output In some applications it is necessary to read the ou...

Page 10: ...the transmitter unintentional disconnection or wire break this status will be displayed at the power output as follows Operation with 4 20mA Output current will be frozen at 2mA Operation with 0 20mA...

Page 11: ...transmitter will begin the start up phase STATUS LED will flash green This will take less than 2 minutes and this time is used to check all internal components During the start up phase the analogue...

Page 12: ...ion to verify correct sensor response Calibration gas should be applied using the Calibration Adaptor accessory part number C03658 at a flow rate of 0 5 litres per minute If internal settings are to b...

Page 13: ...Press DOWN 6 times in a row for 6 seconds without any errors If the restoration has been completed successfully the STATUS LED will flash green for 3 seconds then changing to lighting up yellow one i...

Page 14: ...is still in level 1 of maintenance mode The changed calibration values were not taken over This process has to be repeated Caution The changes only become effective when the maintenance mode has been...

Page 15: ...l change from flashing yellow to flashing green for 3 seconds subsequently changing to lighting up yellow one is still in level 1 of maintenance mode and is still able to carry out system changes In t...

Page 16: ...nge Sensor okay PIN code cor r ect Exit 1 Discard changes STAT SPAN ZERO 3s lat er PIN err t imeout Exit 1 Apply all changes STAT SPAN ZERO 3s lat er no key for 30min UP for 3s DOWN for 3s Service Bas...

Page 17: ...d 102mm Weight 0 25Kg Ingress Protection IP54 Power 12 28Vdc Analogue Output 4 20mA current source can also be set to 0 20mA 0 2V 0 5V 0 10V Repeatability 1 of full scale Linearity 2 of full scale Ope...

Page 18: ...40 STEL T2 710105 03003 Blended Fluids Used in Refrigeration Air Conditioning Market Refrigerant Composition Components Exposure Limit OSHA PEL Detector Part Number R404a R143a 125 134a 1000ppm T2 740...

Page 19: ...CRN It is essential that the address label is securely attached to the outer packaging of the returned goods Units returned to Crowcon as faulty and are subsequently found to be fault free or requirin...

Page 20: ...crowcon com USA Office Crowcon Detection Instruments Ltd 1455 Jamike Ave Erlanger KY 41018 USA Tel 1 859 957 1039 or 1 800 527 6926 Fax 1 859 957 1044 Email salesusa crowcon com Website http www crow...