GASMAX/TX Operation & Maintenance Manual, Revision 1.0
Page 35
Local Smart Sensors are automatically recognized by the GASMAX/TX and the Smart Sensor information
screen should appear immediately after the installation of a local Smart Sensor. If the sensor is the same
gas type as was previously installed, the sensor’s calibration data will be uploaded into the GASMAX/TX.
All other parameters stored in the GASMAX/TX will be retained.
GASMAX/TX units can be reconfigured for different sensors by simply installing a different type
compatible sensor. If a new sensor TYPE is installed, the Smart Sensor identification screen will appear,
followed by the SENSOR MISMATCH message and the user will be given the opportunity to confirm the
new sensor type. If the user activates the EDIT key, all data stored in the new sensor’s database –
including range, tag name, cal span value, engineering units and alarm levels – will replace the current
settings.
SENSOR REPLACEMENT – REMOTE SENSORS
To replace a remote sensor, follow these steps:
1. Turn off the GASMAX/TX by accessing the Device Setup – Turn Power Off menu or holding the
magnet over the NEXT key until the display shows “EDIT at Accept, then pressing the EDIT key.
2. Unscrew the remote sensor head cover. If unable to open the cover by hand, use a Sensor Head
Replacement Tool (p/n 10-0187).
3. Remove the old sensor by pulling straight down.
NOTE: DO NOT TRY TO UNSCREW THE SENSOR. PULL STRAIGHT DOWN.
4. Carefully install the replacement sensor by aligning the arrow on the sensor with the arrow
engraved on the sensor head. Push straight up until the sensor connector seats firmly into the
sensor connector.
5. Reinstall the sensor head cover by CAREFULLY screwing the cover onto the sensor head.
NOTE: IF THE SENSOR FALLS OUT OF THE SENSOR HEAD DURING THIS STEP, IT CAN BE
DAMAGED. USE CAUTION WHEN REINSTALLING THE SENSOR HEAD COVER.
6. Turn the GASMAX/TX ON by holding the magnet over the UP/ON key until the welcome screen
appears on the display.
NORMAL MAINTENANCE
Normal maintenance for the GASMAX/TX primarily involves battery replacement and periodic calibration
on standard intervals. GDS Corp recommends calibration at least every three months, or more often if
temperature extremes, vibration, the presence of incompatible gases or other environmental factors may
accelerate the deterioration of the sensor element. Calibration should also include inspections for clogged
or wet sensor heads, cracked or damaged enclosures and water incursion inside conduit or junction
boxes.
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