Performing A Manual Sensor Check - Fuji Electric ZKME Instruction Manual

10.4.9 Performing a manual sensor check

Description
 Supply zero calibration gas to the detector in order to calculate the internal impedance R of the sensor.
 If the internal impedance R is more than 100 Ω, perform the sensor recovery process.
Operation
(example)
Key operation
(1)
(2)
(3)
(4)
(5)
(6)
How to cancel
 Press the
key to cancel the operation.
 After the cancellation, be sure to close the valves of zero gas.
Note
 You cannot measure an oxygen concentration during sensor check.
Performing a sensor check on the screen
Display the screen on the right in accordance with the key
operation summary and press the
check performing screen appears.
Press the key to perform manual sensor check.
If supplying calibration gas manually (without the auto-
calibration function)
The operator shall open the span gas valve manually and adjust
the flow rate to 1.5 ± 0.5 L/min.
If your detector has the auto-calibration function, you can
activate the external solenoid valve using the contact output
signal at the terminal block.
Oxygen concentration value and cell electromotive force are
displayed.
Wait until the oxygen concentration is stabilized.
Press the key to determine the span calibration factor.
During the process, the sensor impedance is displayed.
After the calibration is completed, the display returns to the
screen on the right.
If the operator opened the span gas valve manually, close the
valve.
Description
key , the manual sensor
- 78 -
Displayed message
(LCD)
MAINTE MENU
SENSOR CHECK
SENSOR CHECK
START
SENSOR CHECK
2.01 % 053.9 mV
SENSOR CHECK
50 Ω
SENSOR CHECK
START
INZ-TN1ZKME-E