SICK GM35

113
8009389/YN39/V3-0/2015-08| SICK OPERATING INSTRUCTIONS|GM35
Subject to change without notice
MAINTENANCE
9.7 Box measuring: Checking the measuring ducts for CO or N
2
O and CO
2
The gas filter box serves to check the CO (N
2
O) and CO
2
measuring duct of the GM35 with
test gases; for CO
2
up to a concentration-measuring path product of 15 % by vol. x m).
Requirements Components required:
• Reflector enclosure with gold-plated hollow triple reflector;
Part No. 2030206.
• Filter box adapter plate with cutout section for the humidity sensor (front of the SR-unit).
Note CO or N
2
O measured values are displayed on the EvU in mg/m
3
• m (operation),
CO
2
measured values are displayed in g/m
3
• m (operation).
9.7.1 Determining the necessary test gas concentration
1 General calculation:
2 Calculating setpoint values for all 6 chamber lengths:
9.7.2 Carrying out measurement
1 Open the SR-unit and swivel to the side.
2 Attach the filter box with the adapter plate to the SR-unit and secure using quick-release
fasteners. Take care not to damage the humidity sensor of the SR-unit!
3 Fit the reflector for the GM35.
Test gas conc. [ppm or % by vol.]
Meas. range [ppm or % by vol.] Actual meas. path [m]•
0.15 m max. filter box length
---------------------------------------------------------------------------------------------------------------------------------------
=
CO
Soll
Test gas conc. [ppm] 1.25
273
353
---------
••
Act. air pressure [hPa]
1013
------------------------------------------------------
• L [mm]
Kammer
• 0.001•=
nom.
chamber
N
2
O
Soll
Test gas conc. [ppm] 1.963
273
353
---------
••
Act. air pressure [hPa]
1013
------------------------------------------------------
• L [mm]
Kammer
• 0.001•=
nom.
chamber
CO
2Soll
Test gas conc. [% by vol.] 1.963
273
353
---------
••
Act. air pressure [hPa]
1013
------------------------------------------------------
• L [mm]
Kammer
• 0.001•=
nom.
chamber
Comp. Required test gas concentration
Filter chamber lengths
25 mm 50 mm 75 mm 100 mm 125 mm 150 mm
CO
CO
2