Section 9
ZGARD S & DS Sensors
Start-Up Procedure
ZGARD S & DS, RS485 DIGITAL SENSOR
9
Apply the appropriate operating power to the sensor.
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The green Sensor OK LED Indicator on front of the sensor should be ON after a 30 second delay. This
will also indicate that the device is operating properly.
9
Allow a few minutes for the sensor to stabilize.
9
Insert Test Jumper H1-Full Scale (FS) into the test position. This should drive the sensor output to 100%
full-scale. If the sensor is connected to a gas monitoring instrument, check that the readings correspond
with that device.
9
Remove Test Jumper H1-Full Scale (FS) from the test position.
Note!
Check the binary code Jumper H1 on EC version and H2 on the SS version. They must be correctly
positioned to reflect the unique address number of each remote sensor connected to MSA ZGARD C Series
Controllers.
Refer to the RS485 Address Code Chart in Section 3.
ZGARD S & DS, 4-20mA SENSOR
9
Apply the appropriate operating power to the sensor.
9
The green Sensor OK LED Indicator on front of the sensor should be ON after a 30 second delay. This
will also indicate that the device is operating properly.
9
Allow a few minutes for the sensor to stabilize.
9
Insert Test Jumper H1-Full Scale (FS) into the test position. This should drive the sensor output to 100%
full-scale. If the sensor is connected to a gas monitoring instrument, check that the readings correspond
with that device.
9
Remove Test Jumper H1-Full Scale (FS) from the test position.
BUMP TEST:
Apply a representative sample gas to sensor and simply check if the sensor responds to the
target gas and has reached the appropriate value.
Note!
Any remote equipment, which may be connected to a remote device, may be activated.
The initial function test of the ZGARD S & DS sensor is now completed.
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