TS4000
40
4.8.1.2 Aborting Gas Check Mode
Gas Check Mode can be aborted during the zeroing stage (prior to “
gAS
” being displayed) if
gas has not yet been applied to the sensor. Simply reapply the magnet to the GM logo on the
Base Unit cover and the unit returns to normal operation.
NOTE:
It is not possible to abort or end the Gas Check Mode once gas is applied.
4.8.1.3 Transferring from Gas Check Mode to Calibration
The TS4000 can be transitioned directly from Gas Check Mode to Calibration Mode by
reapplying the magnet to the GM logo, after applying gas and allowing for the sensor reading to
stabilize. For more information on Calibration Mode, refer to Section 4.9
4.9 Calibration Mode
Figure 18: Calibration Mode
General Monitors recommends that the TS4000 be calibrated one hour after start-up and also
24 hours later. Calibrations should be checked at least every 90 days, to ensure system
integrity. The user should not expect problems with sensor life or stability. Frequent calibrations
will ensure optimum product performance. More frequent calibration checks are recommended
for environments where mud and/or other unintended contaminants may collect on the sensor
or there is a presence of other extreme conditions.
General Monitors recommends that a calibration schedule be established and followed; refer to
Section 9.6 for a sample calibration schedule. A log should also be kept showing calibration
dates and sensor replacement dates.
NOTE:
Calibration Mode is only accessible when a sensor is installed in the TS4000.
NOTE:
The sensor should be powered for a minimum of one hour prior to calibration.
NOTE:
A timeout will occur if the calibration procedure is not completed in at most 10 minutes.
4.9.1 Calibration Procedure
Entering Calibration Mode automatically disables the alarm circuits by sending a 1.5mA output
signal and disabling the Warn and Alarm relays, if present. This also prevents activation of the
remote relay contacts when using a General Monitors Readout / Relay Display Module with the
TS4000.
