ENMET GSM-60 - Manual (Page 19)

GSM-60 ENMET Corporation
16
N OTE : With twin tube input, the non-calibration
line must be plugged.
Figure 7: GSM-60 Calibration Connections
Calibration Process for MOS Sensors
The following calibration procedure must be followed whenever a 60 series part number appear in the part number of the
instrument,
examples 04652-6200-0000, 04652-7083-6000
Humidification is required when calibration is performed. In addition to the standard flow demand regulator, cylinder of
calibration gas you need
ENMET humidifier assembly part number 037000-000
Fill the humidifier with clean water to about ¾ full, connect the flow demand regulator to one side of the humidifier and
connect the other side of the humidifier to the
GSM-60 calibration/sampling port.
Warning: Be sure that the flow direction is correct, note the arrow on the humidifier, failure to do so will cause damage to the
GSM-60 instrument
With the cylinder regulator and humidifier assembled follow the above steps to complete the calibration process
5.3.1
A Low Cal/ZeroCal Adjust
A Low Cal function should be performed only when the GSM-60 sensor are exposed to clean uncontaminated air. Use a
cylinder of 20.9% oxygen to provide a clean air reference if necessary. Attach the cylinder to the calibration adapter, attach the
adapter to the instrument and allow gas to flow over the sensor for up to 4 minutes.
Enter the maintenance menu by repeatedly pressing OPTION switch, until the maintenance menu is displayed. See Figure 6,
GSM-60 Maintenance Menu flow chart.
The first menu available is the Low Cal/ZeroCal.
Press the SELECT switch 4 times to perform a Low Cal.
If the Low Cal/ZeroCal is successful, The display will change to Hi Cal/SpanGas.
If you wish to Hi Cal/SpanGas the sensor apply calibration gas. Proceed to gas calibration Section 5.3.1B
If you wish to Exit the maintenance menu, Press and
hold OPTION switch until the Maintenance Menu is displayed then
release. Then press OPTION switch until “Exit maint menu” appears and then press SELECT switch to return the instrument to
the Operational Display
If the Low Cal/ZeroCal is Not successful, sensor is outside of safe parameters to Low Cal, a “SLP/Off Set err” will be
indicated. Repeat Section 5.3.1 Low Cal/ZeroCal Adjust making sure to use a cylinder of 20.9% Oxygen.
Calibration/Sample Port
Fitting
Cylinder of Gas
Cylinder Valve
and Regulator
Example of Regulator
Humidifier
GSM-60 with O PTIONAL T WIN T UBE I NPUT
To Cylinder of Gas
Quick Disconnect
2 places
Plug
Calibration Adepter with Humidifier - MOS