M&C CG Series Instruction Manual page 17

The M&C gas converters type CG-2 and CG-2M are designed as compact, user-friendly and easy to
service 19" plug-in units  (figure 4) suitable for mounting in 19" cabinet systems. When fitted with the
optional mounting bracket with a vertical swivel-holder (50A3000), the converters can also be wall-
mounted.
The M&C gas converters type CG-2H-W and CG-2MH-W are executed in a compact, user-friendly and
easy to service manner for wall mounting  (figure 5).
All operating elements are mounted on the front panel of the converter for easy access. These are:
Mounting adapter with handle for the catalyst cartridge ;
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Temperature controller with digital temperature display/temperature alarm;
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Selector switch for bypassing the catalyst cartridge  (only versions CG-2M/-2MH-W).
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The catalyst cartridge is mounted in a heat-insulated tube furnace. The special mounting adapter  on
the front plate respectively on the above housing side of the converter allows the hot catalyst cartridge
to be released and removed without tools being needed.
The converter temperature is electronically controlled and can be set continuously at the temperature
controller  on the converter's front panel respectively above housing side within a range between +50
°C [122 °F] and +680 °C [1256 °F], depending on the catalytic reaction (see chapter 18.3).
An alarm for excessively high and low temperatures is provided as a status contact output at the 9-pin
sub-D-plug  (terminals 5 and 9) on the rear side of the converter.
With the version CG-2M and CG-2MH-W internally or externally controlled PVDF 3/2-way bypass sole-
noid valves allow the catalyst to be bypassed, for example for test purposes. The desired sample gas
path is selected internally via the switch  on the converter's front panel or can be switched externally
via the 9-pin sub-D-plug located on the rear of the converter (see chapter 13.2). Two green LED's con-
firm the sample gas path selected:
internally:
Switch position "up" - upper LED lights up green - sample gas path selected via bypass
Switch position "down" - lower LED lights up green - sample gas path selected via catalyst
Only for version CG-2MH-W:
Switch position "up" - upper LED lights up green - sample gas path selected via catalyst
Switch position "down" - lower LED lights up green - sample gas path selected via bypass
The supply-connections are located on the rear or on the upper and lower side of the converter housing.
These are:
9-pin sub-D-plug  (necessary for operation of the device, see chapter 13.2),
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connection socket for shockproof plug 
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sample gas outlet G 1/4" ,
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sample gas inlet G 1/4"  with CG-2/-2M and
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sample gas inlet, 6mm tube connection (standard)  with CG-2H-W/-2MH-W.
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The built-in ventilator in conjunction with the ventilation slots in the converter's side panels respectively
cover provide the necessary ventilation.
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