Bacharach MGS-350, Инструкция по установке и эксплуатации, Страница: 27 / 44

MGS-350 Manual
6509-9000 Rev 1 27
Calibration
Exposing the sensor to a calibration gas, setting the
“zero” or standby voltage to the span/range, and
checking/adjusting all the outputs, to ensure that they
are activated at the specified gas concentration.
CAUTION: Before you carry out the test or calibration:
•
Advise occupants, plant operators, and supervisors.
•
Check if the MGS-350 is connected to external systems
such as sprinkler systems, plant shut down, external sirens
and beacons, ventilation, etc. and disconnect as instructed
by the customer.
•
Deactivate alarm delays if selected (see JP1 and JP2).
•
For bump test or calibration the MGS should be powered up
overnight. The instrument should be fully stabilized per
Section 3.
4.2. Bump Testing
After installation, the units should be bump tested. Expose the sensors
to test gas (NH
3
, CO
2
, etc.). The gas should put the system into alarm
and light LEDs 2 and 3. If a delay is set, it will prevent the relay from
switching until the delay period passes.
With a bump test you can see the functions of the sensor - LEDs 2 and
3 will light, the relay will function, and the output selected (0-10V, for
example) will show the gas level.
NOTE: Ideally bump tests are conducted on site in a clean
air atmosphere.
NOTE: Prior to carrying out a bump test, check and adjust
the zero setting.
NOTE: Do not pressurize the sensor.