SICK GM35

116
8009389/YN39/V3-0/2015-08| SICKOPERATING INSTRUCTIONS|GM35
Subject to change without notice
MAINTENANCE
9.8 Box measuring: Checking the measuring ducts for H
2
O and CO
2
The grid filter box serves for checking the H
2
O and CO
2
measuring duct (for products with
very high concentration measuring paths) of the GM35. Box measuring is based on light
absorption of grid filters (output of measured extinction).
Requirements Components required:
• Grid filter box RMF
• Filter box adapter plate with threaded holes to attach the grid filter box.
Note Measured value are displayed as extinction for both measuring ducts (H
2
O, CO
2
).
9.8.1 Setpoint values
The RMF grid filters are calibrated. The setpoint values for the individual filters are shown
on the label on the enclosure. Filters with extinction values up to 0.8, suitable for the
application range of the GM35, are used. Higher extinction values exceed the warning or
malfunction threshold for not sufficient signal level.
9.8.2 Carrying out measurement
1 Open the SR-unit and swivel to the side.
2 Attach the RMF filter box with the adapter plate to the SR-unit and secure using the
quick-release fasteners: Take care not to damage the humidity sensor of the SR-unit!
3 Install the reflector and set the operating lever to “GM35”.