6
Calibration
6.1
Calibration Frequency
The Gas Sensor Module has been calibrated in the factory prior to shipment. It is recommended that the user calibrate
before placing into service. The sensor module must be calibrated every 180 days at a minimum. Periodic functional tests
are advisable for critical applications and hostile environments. Oxygen sensors will require more frequent adjustment.
The sensor module microprocessor software includes high-level self-checking algorithms which provide continuous sensor
diagnostic and self-adjustment. Users may select to increase calibration frequencies based on low-drift experience during
first two calibration periods.
6.2
Calibration Preparation
Calibration of the sensor is accomplished by simple menu based steps and application of span gas.
NOTE: If an error is made during any stage of the calibration process, hold the magnet stick at the [M] for 10
seconds. A scrolling display will indicate “calibration aborted” and the sensor module will exit the calibration
activity and return to normal operating mode. The calibration procedure can then be restarted.
Calibration must be performed only when the area is known to be clear of the gas of interest. When in doubt, use a portable
instrument to confirm that there is no background.
For compliance with Factory Mutual (FM) Approvals, the Sierra Monitor Model 1250-01 and 1260 -05 are the FM Approved
calibration gas delivery devices. Use the Model 5358-01 Calibration Adapter delivery fitting.
6.3
Calibration Gas Delivery Methods
Calibration gas can be delivered to the sensors via the Model 5358-01:
Calibration Adapter - used with portable calibrators.
Calibration Procedure
The Calibration Menu is described in Section
.
The procedure requires that the menu “keys” be activated using the magnet stick. Each key
press steps through the process of setting the zero value for clean air and then setting the span
value.
Allow for a minimum of 3 minutes during zero calibration step.
At each of these steps, apply calibration gas of the value corresponding to the setting accepted on the sensor module
display.
32
SMC 5100-XX-IT Toxic Gas Detector Module
6 Calibration
US
Summary of Contents for 5100-03-IT
Page 5: ...15 5100 88 IT Dimensions 67 SMC 5100 XX IT Toxic Gas Detector Module 5 US...
Page 20: ...mA Circuit Types 20 SMC 5100 XX IT Toxic Gas Detector Module 4 Installation US...
Page 50: ...12 Modbus Memory Map 50 SMC 5100 XX IT Toxic Gas Detector Module 12 Modbus Memory Map US...
Page 51: ...13 HART SMC 5100 XX IT Toxic Gas Detector Module 51 US 13 HART...
Page 52: ...52 SMC 5100 XX IT Toxic Gas Detector Module 13 HART US...
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