Maintenance Vortex Manual
50 Issue 7 December 2009
MAINTENANCE
1. For a new detector, calibrate the detector first. For the calibration procedure, please refer to the
relevant Installation, Operating and Maintenance Instructions provided with the detector.
2. Inhibit the channel by pressing the appropriate ZONE INHIBIT button on the back of the Display
Module.
The calibration can be carried out without inhibiting the channel, but associated relays and
audible and visual alarms may be triggered.
3. Ensure that the associated detector is reading zero level (4mA for a gas detector):
• For an oxygen detector, the sensor must be disconnected from the current amplifier at the
detector head.
• For other gas detectors, the detector should be in free mobile air.
• For a fire detector, the fire loop current connector must be disconnected at the Quad Channel
Input Module.
4. Using the HOLD and STEP buttons, select the channel to adjust.
5. Once the display is held on the appropriate channel press the CHANNEL TEST button on the
inside of the Display Module. The display should show GL for a gas detector or FL for a fire
detector, and the detector level reading (this should be approximately zero).
6. Press the ZERO button. The display should read 0.
If there is an E008 fault, it indicates that the incoming signal is too far from the nominal zero
level to allow compensation. Check that the detector is wired correctly and the Quad Channel
Input Module switch setting is correct.
7. Provided that zero adjustment was successful, reconnect the sensor (for oxygen detectors only) or
connector (for fire detectors only).
8. With Vortex not in Channel Test, press PEAK HOLD CAL to clear the memory.
9. For an oxygen detector, expose the detector to free mobile air. Ensure that the display is showing
GL and the current gas level reading. Allow this reading to stabilise.
For other gas detectors, apply calibration gas to the detector (normally half scale, but must be
greater than 20% of full scale). Allow enough time for the detector to settle (typically two
minutes). Ensure that the display is showing GL and the current gas level reading. Allow this
reading to stabilise.
For a fire detector, connect an ammeter into the channel circuit. Ensure that the display is
showing FL and operate a manual call point. If the circuit has no manual call point, put a detector
into alarm with a smoke canister.
10. Press the PEAK HOLD CAL button.
11. Use the – (HOLD) and + (STEP) buttons to adjust the Reading display to the correct reading:
• For an oxygen detector in free mobile air calibrate to a reading of 20.9% Vol.
• For other gas detectors, this should be the level for the applied calibration gas.
• For other 4-20mA devices this should be the level for the applied condition.
• For a fire detector, this should be the same reading as the ammeter in the circuit.
12. Press ACCEPT/RESET. The display should read the calibration gas concentration (for a gas
detector)or the current in mA (for a fire detector).
To Next Page
Loading...
