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7.0 GAS CALIBRATION PROCEDURE
1. Unlock the monitor using Command Code 25 and the User Password factory preset to
“1”.
2. Initiate calibration by entering Command Code 111. The display will request zero gas
be applied to the sensor head. The LED status indicator will turn on green
continuously.
3. Apply zero gas to the sensor head using the calibration adapter (Conspec Part #
P3013-xx), tubing, and proper gas cylinder (Conspec PN# P1880-xx)
The display will indicate the raw decimal value of the sensor’s output.
4. When the raw value on the display has stabilized, press ENTER to accept. This
should take approximately 2-4 minutes. Remove the zero gas after the value has
been accepted.
5. The display will request span gas be applied to the sensor head. The LED status
indicator will turn red continuously. When the raw value has stabilized, press ENTER
to accept. This should take approximately 2 – 4 minutes.
If the new calibration information is accepted, “Calibration Done” will be displayed for 30-60
seconds to allow the sensor to recover and prevent any alarms from tripping. The monitor will then
return to normal operation. To speed the recovery of the sensor it is recommended to remove the
calibration adapter immediately following calibration.
If the calibration information is not accepted “Calibra. Error” will be displayed. The pre-existing
calibration data will be reused at this point to help prevent an invalid calibration. Two common
reasons the calibration may be rejected are:
(1) Entering the data before the sensor has fully reacted to the target gas or:
(2) The sensor has passed its expected life and can no longer produce a signal within the
acceptable calibration limits. The sensor element is in most cases a consumable part that
periodically requires replacement. See page 13 for sensor replacement instructions.
Calibration gases, accessories, & kits can be purchased from Conspec for all
available gas detection transmitters and monitors supplied by Conspec.
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