CTI GG-VL2-NH3, Инструкция по установке и эксплуатации

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GG-VL2-NH3
The GG-VL2-NH3 was designed for long life and
minimal maintenance. For proper operation it is
essential that the calibration schedule be adhered to.
Calibration Technologies recommends the following
maintenance schedule:
Maintenance Guidelines:
• Sensor should be calibrated at 6 month intervals.
•
Calibration should be performed with certified
calibration gas. Calibration kits and replacement
cylinders are available from Calibration
Technologies.
• All tests and calibrations must be logged.
• Always disconnect power at the controller before
performing any wiring at the sensor.
Sensor Life: This catalytic bead sensor exhibits long
life and is very reliable. Typical sensor life is 5-7 years.
As with all gas detectors, regular 6-month calibration
intervals are essential to correct for sensor aging
characteristics. A few conditions can cause the sensor
to become faulty, including:
• a long period of time.
• exposure to liquid ammonia.
• poisoning due to silicon-based oils or lubricants,
sulfur compounds or high concentrations of
chlorine gas.
Maintenance
Sensor Replacement: (part #: GG-VL2-NH3-RS)
When the sensor becomes faulty, a replacement
sensor element can be obtained from Calibration
Technologies.
To replace the sensor, refer to Figure 3 and the
following procedure.
Caution: Always assume the system could
discharge at any moment. Stay clear of discharge
path and have an escape route planned.
1. Be prepared for fault/alarm conditions during this
process.
2. Remove power from sensor. This can be done by
simply unplugging the 4-position power plug from the
transmitter.
3. Unplug sensor cable from transmitter.
4. Unscrew the sensor element assembly and discard
old sensor.
5. A replacement O-ring is included in case existing
O-ring is damaged or lost.
6. Screw in new replacement sensor assembly (do not
overtighten).
7. Plug in sensor cable to transmitter.
8. Re-apply power to sensor
9. The sensor can be response-tested immediately
after replacement but allow 12-hour warm-up time
before performing zero/span calibration.