Crowcon 20/20M Скачать руководство пользователя страница 5

The connection of the internal IR sensor module to the interface electronics is via a 4
data cable (Fig. 4). The circuit board is screwed to the internal built
outside. The IR gas sensor is integrated into this
protect it from any unwanted external effects.

Figure 4: 4-pin data

Caution:

The IR sensor module

operated as a pair. Both components form a fixed unit and must not be separated!

2.2.

Installation

The installation of the transmitter is described

The F-Gas detector should be
present. The gas must come into direct contact with the sensor in order to be detected.
Detectors are typically installed
refrigerant cylinders, within storage rooms or
from valves, pipe flanges and joints, pipe/vessel

The following points should be noted when locating gas detectors:

• To detect heavier-than-air gases

• Detectors must be mounted as close as possible to potential leak sources.

• When locating detectors consider the possible damage caused by
or exposure to jets from hoses or pressure washers.

• Consider ease of access for functional testing and servicing.

• Consider how the escaping gas may behave due to natural or forced air currents.

• Consider the process conditions. For example
released from a process at

F-Gas Detector

The connection of the internal IR sensor module to the interface electronics is via a 4

he circuit board is screwed to the internal built-in

gas sensor is integrated into this casing to minimize the dead volume and to

protect it from any unwanted external effects.

pin data cable connecting the IR sensor to the interface PCB

module is tailored to the connected interface 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 likely to be

The gas must come into direct contact with the sensor in order to be detected.

ypically installed around compressors, pressurised storage vessels,

storage rooms or adjacent to pipelines. Gas leaks typically occur

pipe flanges and joints, pipe/vessel filling or draining connections, etc.

The following points should be noted when locating gas detectors:

air gases detectors should be mounted at low level.

Detectors must be mounted as close as possible to potential leak sources.

• When locating detectors consider the possible damage caused by water: rain, flooding,

from hoses or pressure washers.

• Consider ease of access for functional testing and servicing.

• Consider how the escaping gas may behave due to natural or forced air currents.

conditions. For example heavier than air

at elevated temperatures and/or pressures.

Gas Detector Instructions

The connection of the internal IR sensor module to the interface electronics is via a 4-pin

in casing from the

to minimize the dead volume and to

to the interface PCB

interface PCB and must only be

. Both components form a fixed unit and must not be separated!

mounted where the gas to be detected is most likely to be

The gas must come into direct contact with the sensor in order to be detected.

around compressors, pressurised storage vessels,

Gas leaks typically occur

draining connections, etc.

detectors should be mounted at low level.

Detectors must be mounted as close as possible to potential leak sources.

water: rain, flooding,

• Consider how the escaping gas may behave due to natural or forced air currents.

gases may rise if

Содержание 20/20M

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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