Microx User Manual
Rev. 1.2
V233P
Page 18
4.2.1
Menu 1
– Calibrate sensor
•
Press the MENU button to open the menu system.
•
Using the NEXT and PREVIOUS buttons select menu option:
E:1
•
Press ENTER.
•
Apply a known concentration of gas (applicable to sensor type)
at a flow rate of between 100 to 500 ml/m. Allow time for the
sensor to respond. (see diagram on page 8)
•
Using the INC and DEC buttons set the reading to that of the
calibration gas level.
•
Press ENTER to span the sensor, ‘
– – – –
‘will be displayed to
confirm the sensor span has been performed.
Note: Pressing the MENU button rather than the ENTER
button exits the span feature without performing the
calibration.
Wait until the reading is stable, if not press the ENTER
button to span the sensor.
•
Press the MENU button to close the menu system.
Note: The sensor span setting will be displayed ( as a
percentage value) on exit while the MENU key is pressed.
Note that this value is a percentage of the initial calibration
value set via “New Sensor Data” in menu E:14. See note
below.
•
Turn off and disconnect the calibration gas.
Note: On each occasion that a new sensor is connected and calibrated the
“New Sensor Data” should be set via the procedure in menu 14. The
setting should only be carried out after the calibration and not before.
This will ensure that subsequent span setting figures displayed on exit
of menu 1 will be valid.
*E:9-Password protected, Factory only; **E:10-visibilty according to sensor type.
Important!
Electro-Chemical Sensors.
For ppm configured modules that have been fitted with a
replacement sensor the “Zero Offset” (Menu 10) must be
entered prior to a calibration.