Single Gas Sensor Module (SGSM)
Operations Manual
Super Systems Inc.
Page 29 of 38
Page 29 of 51
calibration needs to be the same as the sample gas flow during normal operation. That flow is
generally 1 to 2 cfh, but may be different for each application. SSi suggests that this device
should be calibrated on a routine basis, such as once a year or as prescribed by the user’s
quality system requirements.
Connect the gas to the “Cal Gas Inlet” on the side of the SGA enclosure and open the valve. It is
recommended to let everything (gas and SGA) sit for approximately thirty minutes to allow the
temperature to achieve equilibrium.
To perform a sensor calibration, first make sure that the system is set up to flow both zero gas
(with 0% of the gas the sensor is designed to detect) and span gas when needed. The gases
should be “Certified Primary Standards” or equivalent accuracy. Then follow these steps:
1.
Note the percentages of the sensor gas in each gas source (zero and span).
2.
Ensure that the system is purged of any latent gas.
3.
Flow the zero gas until the gas reading on the web page stabilizes.
4.
Enter the target gas concentration in the “Enter gas concentration (%)” field.
5.
Press the “Calibrate” button. A Calibration Timer will count down.
6.
Once the Calibration Timer has counted down, the zero value will be calibrated.
NOTE:
The remaining steps for the span gas will be very similar to the steps performed for the
zero gas calibration.
7.
Ensure that the system is purged of any latent gas.
8.
Flow the span gas until the gas reading on the web page stabilizes.
9.
Enter the target gas concentration in the “Enter gas concentration” field.
10.
Press “Calibrate”. A Calibration Timer will count down.
11.
Once the Calibration Timer has counted down, the span value will be calibrated.
Figure 16 - Sensor Calibration Page