AMC AMC-1224 Gebruiksaanwijzing - Pagina 15

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AMC-1225 SENSOR MODULES

NOTE:

If the sensor has been replaced, adjust the SIGNAL first, then proceed with LOW alarm

and HIGH alarm adjustments. Signal calibration is performed using a digital multimeter

set to measure DC voltages to two (2) decimal places (e.g. 0.00 Volts).

The SIGNAL adjust is used to set the sensitivity of the sensor. This is done by exposing the

sensor to the LOW alarm concentration of gas. The voltage associated with signal can be

measured between the negative (-) power line on the output terminal block and the test point

Figure 5-1Figure 5-1

next to the signal trimmer, see

. The voltage measured at the signal test

point should be approximately 1.20 Volts.

When calibration is completed, remove the calibration chamber, replace the sensor element

while observing the correct polarity, and then reinstall the cover plate with the four screws.

CAUTION:

Only qualified personnel should perform the actual calibration. Users are advised to

consult The Armstrong Monitoring Corporation as to the recommended calibration gas

concentration for the application, and any other questions.