AMC AMC-1228, Инструкция по эксплуатации, Страница: 12 / 15

AMC-1228 Multidrop
10
5 OPERATION AND CALIBRATION
This section covers instructions for the proper operation and calibration of the AMC-1228 unit.
The operation principles are described in further detail, followed by different types of periodic
adjustments that might be required throughout the lifetime of the equipment.
5.1 OPERATION
In general, after the stabilization period and in a clean air environment, the sensor module
should be displaying a GREEN Power ON LED. This green indicator, as well as the yellow and
red alarm indicators, are all visible through windows on the front panel.
5.1.1 ALARM CONDITIONS
If any gas exceeds the LOW alarm trip point setting, the yellow LED will turn ON and the unit will
transmit a signal and also turn ON the yellow LED at the monitor. Likewise, if any gas exceeds
the HIGH alarm trip point setting, the red LED's will turn ON.
5.1.2 FAULT SUPERVISION
The AMC-1228 is equipped with fault detection circuitry. This condition is indicated by turning
OFF the green Power LED viewed through the front panel. The condition will exist until the fault
is corrected.
5.2 CALIBRATION
The AMC-1228 sensor module is factory calibrated at levels based on set standards.
Calibration of the unit should last for the life of the sensor, with few periodic adjustments, unless
the alarm trip point settings need to be changed. All on-site adjustments are made at each
sensor module. Recalibration is necessary when replacing the sensor or changing the alarm
trip point settings. Factory or on-site calibration services, customer training, and/or calibration
adapter can be provided, refer to section 2.2 FACTORY CALIBRATION, page 4. Specify each
sensor module’s model number and gas when requesting any of the above.
Equipment Required:
•
Digital Multimeter,
•
Miniature slot screw driver,
•
Calibration adapter
•
Calibration gas and regulator (Contact factory for information)
5.2.1 Span Adjustment
1. Signal is measured from TB3 (-) to 20K resistor (see Figure 4 for location).
2. Apply calibration gas to sensor.