DF-8500 C Point type combustible gas detector with measuring range of 0~100%LEL
(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, which indicates that
manual gain calibration is ready. Press “OFF” to cancel the manual gain calibration and
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: Please make sure the transmitter has been energized for at least one hour
before attempting a gain calibration.
4.3 Calibration
To ensure the stable performance of the product, MSA recommends
the users to perform the calibration every three month. The
calibration flow should be 1 liter/min and calibration should use
calibration cap regulated by MSA. Failure to perform calibration for
a long time or use of incorrect calibration flow and calibration cap
may have adverse effects on the product performance.
The device is calibrated at the factory. Nevertheless, it is recommended to recalibrate
the device after installation. The frequency of calibration depends on the duration of
use and the chemical exposure of the senso.
Connect power to the device at least 1 hour before attempting a calibration.
Carry out the calibration during commissioning as well as at regular
intervals. This ensures optimum operation of the sensor.
It is recommended that all calibration components are connected before
starting a calibration as it is necessary to apply test gas to the device
during a countdown.
Wait for calibration gas
After starting any calibration, calibration gas (zero or test gas) must be provided until
the calibration is completed.
Calibration steps
Zero calibration please refer to M-01 in Chapter 4.2.2; Gain calibration please refer
to M-02 in Chapter 4.2.2.
Press “OFF” can exit calibration procedure at any moment and device still
use the last calibration result of transmitter when exit.
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