Det-Tronics Eagle Quantum Premier - CALIBRATION ALGORITHM CFOR COMBUSTIBLE GAS DCUS and AUTOMATIC CALIBRATION of UNIVERSAL Dcus; Routine Calibration; Sensor Replacement

5-3
95-8533
18.2
11. Remove the span gas, and return the
analog input to normal.
12. Activate the reed switch. (The red LED
blinks for three seconds while the reed
switch is closed)
13. The calibration is complete. The calibrate
LED turns off.
NOTE
If the calibration is not completed within
12 minutes, the previous calibration
values are restored and the calibration
is logged as aborted. The calibrate LED
will ash.
Sensor Replacement
WARNING
The hazardous area must be
de-classied prior to removing a junction
box cover with power applied.
1. Open the junction box cover and press the
Sensor Replacement Switch.
2. The calibrate LED on the communication
module will flash, indicating it is ready for
the zero input.
3. Replace the sensor and apply the zero
input (4 mA).
4. Activate the reed switch. (The red LED
flashes for three seconds while the switch
is closed.)
5. The communication module records
the uncalibrated value in position one
of the calibration log and calibrates the
zero value. (The calibrate LED stays on
steady.)
6. Apply the calibration gas.
7. The calibrate LED flashes when the input
increases.
8. Activate the reed switch. (The red LED
flashes for three seconds while the reed
switch is closed.)
9. The communication module records the
uncalibrated value in the first register of
the calibration log and calibrates the span
value.
10. The calibrate LED stays on steady.
11. Remove the span gas and return the
analog input to normal.
12. Activate the reed switch. (The red LED
flashes for three seconds while the switch
is closed.)
13. The calibration is complete. (The calibrate
LED turns off.)
NOTE
Pressing the Sensor Replacement
Switch aborts calibration and starts over.
NOTE
Resetting the communication module will
abort the sensor replacement.
CALIBRATION ALGORITHM C
FOR COMBUSTIBLE GAS DCUS AND
AUTOMATIC CALIBRATION OF
UNIVERSAL DCUs
CAUTION
After exposing the H2S sensor to
high concentrations of gas, it should
be exposed to fresh air for at least 30
minutes, and re-calibrated.
Routine Calibration
1. Apply the zero gas.
2. Activate the reed switch for at least four
seconds. (The red LED flashes for three
seconds while the switch is activated.)
3. The calibrate LED on the communication
module flashes, indicating it is ready for
the zero input.
4. Wait until the calibrate LED stays on steady
(approximately four seconds).
NOTE
The communication module records the
uncalibrated value in the calibration log and
calibrates the zero value during this time.
5. Apply the calibration gas. (The calibrate
LED flashes when the sensor detects
gas.)
6. When the sensor input has been stable for
30 seconds, the communication module
records the uncalibrated value in the
calibration log, and calibrates the span
value.