Det-Tronics EA2100CG Eagle 2000 Communication Gateway - Manual (Page 36)

CALIBRATION ALGORITHM C
(Type Codes 7, 8, 9, 10)
Normal Calibration
1. Apply the zero gas. (See Figure 31.)
2. Activate the reed switch or input 1 for at least 4 sec-
onds. The red LED blinks at a 2 Hz rate for 3 sec-
onds while the reed switch is closed.
3. The calibrate LED on the communication module
flashes at a 1 Hz rate, indicating it is ready for the
zero input. The calibrate bit in the status word is
set.
4. Wait 4 seconds.
5. The communication module records the uncalibrat-
ed value in the calibration log and calibrates the
zero value. The calibrate LED goes on steady.
6. Apply the calibration gas.
7. The calibrate LED blinks at a 1 Hz rate when the
input increases.
8. Wait for the sensor input to be stable for 30 sec-
onds.
9. The communication module records the uncalibrat-
ed value in the calibration log and calibrates the
span value.
10. The calibrate LED goes on steady.
11. Remove the calibration gas.
12. The communication module waits until the analog
value drops below 4% full scale.
13. The calibration is complete. The calibrate LED
turns off and the calibrate bit in the status word is
reset.
If the calibration is not completed within 12 minutes, the
previous calibration values are restored and the calibra-
tion is logged as aborted. The calibrate LED blinks at a
4 Hz rate, the calibrate bit in the status word is reset,
and the calibration fault bit is set.
Calibration After Sensor Replacement –
Combustible Gas
1. Open the junction box cover and press the sensor
replacement switch for about 1 second.
2. The calibrate LED on the communication module
flashes at a 1 Hz rate, indicating it is ready for the
zero input. The calibrate bit in the status word is set.
3. Switch the transmitter to calibrate and connect a
voltmeter to the test points.
4. Replace the sensor and wait 5 minutes for the sen-
sor output to stabilize.
5. Adjust the zero output for 0.40 vdc (4 ma).
6. Switch the transmitter to normal to set the sensor
analog zero.
7. Activate the reed switch or input 1 on the communica-
tion module for 4 seconds. The red LED blinks at a 2
Hz rate for 3 seconds while the reed switch is closed.
8. The communication module records the uncalibrated
value in position one of the calibration log and calibrates
the zero value. The calibrate LED goes on steady.
9. Switch the transmitter to calibrate.
10. Apply the calibration gas and wait for the output to
stabilize.
11. Adjust the span to 1.2 vdc (12 ma) if 50% LFL gas
is used.
12. Switch the transmitter to normal to set the sensor
analog span value. The red LED blinks at a 1 Hz
rate when the input goes high.
13. Activate the reed switch or input 1 on the communi-
cation module. The red LED blinks at a 2 Hz rate
for 3 seconds while the reed switch is closed.
14. The communication module records the uncalibrat-
ed value in the first register of the calibration log
and calibrates the span value.
15. The calibrate LED goes on steady. Remove the cal-
ibration gas and meter and close the cover.
16 The communication module waits until the analog
value drops below 4% full scale. The calibration is
complete. The calibrate LED turns off and the cali-
brate bit in the status word is reset.
Pressing the sensor replacement switch aborts the cali-
bration and starts over.
32
3 SEC 3 SEC 3 SEC 3 SEC
3 SEC 3 SEC
3 SEC 3 SEC 3 SEC
ACCEPT ZERO ACCEPT SPAN
ACCEPT ZERO
ACCEPT ZERO ACCEPT SPAN
FRESH AIR
REMOVE GAS
SPAN GAS
ZERO GAS
3O SEC MIN
3O SEC MIN
3O SEC MIN
RECORD SPAN
TRENDING SPAN
REED SWITCH
ANALOG IN
LED
REED SWITCH
ANALOG IN
LED
REED SWITCH
ANALOG IN
LED
U8800 INPUT
ANALOG IN
LED
IN ONE
A1555
ACCEPT ZERO ACCEPT SPAN
3 SEC
3 SEC
OLD SPAN
CALIBRATED SPAN
1
SEC
UNCONTROLLED ANALOG SIGNAL
UNCONTROLLED ANALOG SIGNAL
UNCONTROLLED ANALOG SIGNAL
UNCONTROLLED ANALOG SIGNAL
A1555
A1555
A1555
3O SEC MIN
3 SEC 3 SEC 3 SEC
ACCEPT ZERO
ZERO
IN ONE
ANALOG IN
LED
A1555
UNCONTROLLED ANALOG SIGNAL
Figure 31—Calibration Algorithm "C"