Vortex Manual Maintenance
Issue 7 December 2009 51
MAINTENANCE
If there is an E009 fault, it indicates that the mA output from the detector and the required
reading are too far apart to allow compensation. The detector calibration should be checked.
13. The detector and Quad Channel Input Module are now configured and calibrated correctly.
• For a gas detector (other than oxygen), remove the calibration gas.
• For a fire detector, remove the ammeter and reconnect the fire loop.
14. Press the RUN button on the front of the Display Module to release the Channel Test Mode.
15. Release any Inhibit Conditions by pressing the appropriate ZONE INHIBIT button.
16. If necessary select another channel and repeat the procedure until all channels requiring
calibration are complete.
7.4 Channel Test Mode
Channel Test mode is used to view and modify the alarm level settings for a channel, using the Display
Module, and to test the configuration of relay outputs.
Channel Test mode is also needed in order to carry out calibration and re-calibration operations (see
sections 3.8 and 7.3).
7.4.1 Channel Test Mode procedure
During Channel Test mode, all gas detection and relay functions are unaffected, except for the selected
channel. The internal sounder is not used to sound alarms during Channel Test mode. The detector
level readings transmitted over the MODBUS communications link are effected in this mode, contact
Crowcon for more details.
If you wish to test simple relay configurations, you can use this procedure with the zones not inhibited.
Note that the fault condition step in Channel Test mode does not cause any relays to be triggered.
To view the channel settings:
1. Select the required channel with the HOLD and STEP buttons.
2. Press the ZONE INHIBIT button for each of the channels you intend to test, in order to avoid
operation of the relays, unless you wish to check the relay output configuration.
3. Press the Channel Test button on the back of the Display Module.
If the channel is a gas detector (or any other 4-20mA input device), the Channel display shows
the code GL (for Gas Level), and the Channel Test LED flashes. The gas reading is displayed in
the Reading display.
If the channel is a fire detector, the Channel display shows the code FL (for Fire Level), and the
Channel Test LED flashes. The loop current is displayed in the Reading display in milliamps.
The readings are displayed without zero suppression.
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