Normal Operation; Maintenance - GasTech GTA-4100R Operator's Manual

• The Status LED changes from green to red.
• The buzzer and fault relay activate.

4.3 Normal Operation

Normal operation is any time the start up procedure has been completed, no calibration or set-up procedures
are in progress, and no alarm, or fault condition exists. During normal operation, the GTA-4100R behaves as
follows:
• The screens displays the current gas concentrations (channel 1 on the top half of the screen, channel 2 on
the bottom half of the screen).
• The 4 to 20mA analog recorder outputs at the terminal strip correspond to the displayed gas readings.
• The AL1 ALARM, AL2 ALARM, and FAULT LED's and relays for both channels are off.
• Common module buzzer is off

4.4 Maintenance

WARNING: Perform all installation procedures in a fresh air environment (known to be free of
combustible and toxic gas and having normal oxygen content).
Routine maintenance of the GTA-4100R consists only of periodic checks to ensure that the system remains at
zero (or 20.9% for O ). The transmitters and sensors used in conjunction with the GTA-4100R must be
2
calibrated at regular intervals following the procedures described in their respective manuals.
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