Regard 2400 / 2410 In Use With Polytron Se Ex Sensing Heads; Accessories; Installation Of The Internal Half-Bridge Converter - Dräger REGARD 2400 Instrucciones De Uso

7 REGARD 2400 / 2410 in use with Polytron SE Ex
sensing heads
NOTICE
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When a REGARD 2400/2410 is connected to a catalytic sensor, a half-bridge
converter must be used. 2 different converters can be used:
SC00016 internal converter for the Dräger REGARD 2400
3604655 external converter for all versions (replacement for Part No. 3603560)
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Accessories

8.1

Installation of the internal half-bridge converter

Only Dräger REGARD 2400
When one or more Polytron SE Ex sensing heads are connected to the Dräger REGARD 2400,
a half-bridge converter (Order no. SC00016) must be used.
This is necessary because the catalytic sensor in the Polytron SE Ex sensing head operates as
part of a Wheatstone bridge with half of the bridge located in the sensor of the sensing head.
The other half of the bridge is located on the converter board. The half-bridge converter supplies
the sensor and converts the half-bridge signal into a 4-20 mA signal which is processed
internally by the Dräger REGARD 2400.
Procedure:
1. Disconnect REGARD 2400 from the power.
2. Remove short-circuit bridge and insert half-bridge converter.
Fig. 4
1) (Polytron SE Ex Sensor)
Dräger REGARD 2400/2410

REGARD 2400 / 2410 in use with Polytron SE Ex sensing heads

1)
Channel D
Channel C
Channel B
Channel A
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