GASMAX II Operation & Maintenance Manual, Revision 7.0
Page 28
ALARM OPERATION
–
ALARM 3
ALARM 3 is typically used to indicate FAULT conditions that suggest sensor failure
or “out of
measurement range” conditions. However, some applications require a third level alarm. The
LARM 3
menu is identical to ALARM 1 and ALARM 2 and may be set to trip at any level.
NOTE:
ALARM 3 WILL ALSO TRIP WITH MISSING OR FAILED SENSORS REGARDLESS OF THE PROGRAMMED
LEVEL VALUE.
FINAL TRANSMITTER SETUP
Once operational, the user should verify the following transmitter settings prior to initial calibration.
Setting these values during warm-up is recommended.
1.
Local time and date: Check date value and adjust time for proper time zone.
2.
Tag name or Engineering Units settings: Edit values as necessary.
3.
CAL SPAN GAS value: Set to match concentration of calibration gas cylinder.
4.
CAL MARKER value: Adjust desired output mA during calibration.
5.
ALARM 1, ALARM 2 settings: Set for desired levels. NOTE: If relays are not installed, GASMAX II
programmable alarm levels affect operation of front panel LEDs only.
A NOTE ON WARM UP
Allow the GASMAX II to stabilize for at least four hours, preferably overnight if possible. This will allow all
sensors to reach stable equilibrium with respect to environmental conditions such as ambient
temperature, humidity, and barometric pressure. Infrared sensors generally contain intelligent electronics
that compensate for at
mospheric conditions; these sensors can be considered ‘ready’ in as little as one
hour. Electrochemical sensors depend on chemical processes that need more time to reach equilibrium
with the
applied “reference” and “counter” voltages generated by the G M
X II electronics.
Once warm-up is complete, the GASMAX II can be calibrated and made operational.
