RKI Instruments GD-70D Series - Manual (Page 68)

8 Maintenance 8-4. How to replace parts
GD-70D - 68 -
<Cleaning of Detector>
Clean the detector if it becomes extremely dirty. The detector must be turned off while cleaning it. Use a
waste cloth to remove dust. Do not use water or organic solvent for cleaning because they cause
malfunctions.
Because an extremely large amount of dust inside the tube may disturb the gas detection, it must be
cleaned with dry AIR, etc.
8-4. How to replace parts
<Replacement of Consumables>
Sensor Unit Replacement
The sensor unit can be replaced in a single step as shown in the figure.
When attaching the sensor unit to the main unit, thrust it onto the main
unit and make sure that the sensor unit is securely fixed, otherwise it
might come off.
After replacing the sensor unit, close the front cover. Be sure to check
the click of the front cover to fix it properly, otherwise it might open
again.
External Dust Filter Replacement
Because the external dust filter may gradually get dirty or clogged over the
time, it must be replaced regarding the operating conditions. Check the
external dust filter, and then replace it as necessary.
CAUTION
• Turn OFF the power when the sensor unit is replaced.
• After the sensor unit is replaced, always perform a gas
calibration (zero adjustment and span adjustment).