M-13 menu item. Press the “ON” key to complete the zero calibration and return to the
measurement mode automatically.
At this time, you can see that the concentration
display has been reset to 0.
Note: For conventional gas, e.g. O2, H2
S and CO, please make sure the detector
has been energized for at least one hour before attempting a zero calibration.
For rare gas, e.g. ETO, methanol and VCM, it needs to be 24 hours.
[M-14] -- Manual gain calibration
This menu is used for manual gain calibration. Note: Please use M-
automatic gain calibration as far as possible. Manual gain calibration through M-
shall only be performed when automatic gain calibration cannot be completed
M-02 when unstable gas flow is caused by strong wind or other factors at the site.
(1) Ventilate the gain gas with the concentration level as shown in M-03 for one minute.
(2) Press “+” select the menu item M-14.
(3) Press “ON” and the screen will display the menu for entering password.
(4) Enter the password (see Section 4.4).
(5) If the password is correct, you will enter the next level of submenu M-14. At this
time, the concentration as shown in M-03 will flash in the display,
manual gain calibration is ready. Press “OFF” to cancel the manual gain calibration
return to M-14 menu item. Press the “ON” key to complete the gain calibration and
return to the measurement mode automatically. At this time, you can see that the
concentration display has been reset to the concentration as shown in M-03.
(6)remove gain calibration gas.
Note: For conventional gas, e.g. O2, H2
S and CO, please make sure the detector
has been energized for at least one hour before attempting a gain calibration.
For rare gas, e.g. ETO, methanol and VCM, it needs to be 24 hours.
To ensure the stable performance of the product, MSA
the users to perform the calibration every three months.
calibration flow should be 0.25 liter/minute and
use calibration cap regulated by MSA. Failure to perform
for a long time or use of incorrect calibration flow and
cap may have adverse effects on the product performance.
The device is calibrated at the factory. Nevertheless, it is recommended to
the device after installation. The frequency of calibration depends on the duration of
use and the chemical exposure of the sensor.
Carry out the calibration during commissioning as well as at regular
intervals. This ensures optimum operation of the sensor.
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