Configuration; Maintenance; Inhibit; Adjustment Of The Semi-Bridge Converter For Se Ex Sensing Heads - Dräger REGARD 2400 Instructions For Use Manual

12. Configuration
The configuration of the Dräger REGARD 2400 / 2410 is done by configuration software.
For configuration details please refer to the Configuration Instructions
After any work with the configurration software the programming of the unit must be tested
at the control unit!

13. Maintenance

13.1. Inhibit

The "Inhibit" function on the Dräger REGARD 2400 / 2410 locks all relays while calibrating or
configuring the unit. The "Inhibit" mode will reset itself automatically after 20min. To activate
"Inhibit" see Flow-Chart on page 44.
13.2. Adjustment of the Semi-Bridge Converter for SE Ex Sensing
Heads
The converter must be fitted into a powered Dräger REGARD 2400 for the adjustment proce-
dure. A Polytron SE Ex sensing head must also be connected with the converter.
Adjusting the supply voltage for the semi-bridge
The semi-bridge current can be measured with a voltmeter at two test points on the right
hand side of the converter module.
The converter is factory set to 270 mA, which is the required sensor current for a Polytron
SE Ex PR M, all other Pellistor based systems need to be adjusted.
The sensor current can be adjusted via the associated potentiometer The following chart
shows the voltages at the test point for various sensor supply currents.
CAUTION
Configuration
Maintenance
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