SMC sierra monitor corporation Sentry Instruction Manual - Version 6
CALIBRATION
Page: 51
5.3.2 CALIBRATION GAS DELIVERY METHODS
Calibration gas is can be delivered to the sensors via the
following delivery devices:
Model 5358-00: Calibration Adapter - used with portable
calibrators. - See Figure 5-1
Model 5360-00: Calibration Gas Delivery fitting -
permanently installed fitting which allows tubing to be run
to a convenient delivery location
5.3.3 SENSOR EXPOSURE TO GAS
Calibration gas must be delivered to the sensor using the
flow rate and duration listed in Table 5-1
Model Gas Flow Period
5100-01 H2S 300 cc/min 3 minutes
5100-02 Combustible 100 cc/min 3 minutes
5100-03 O2 200 cc/min 3 minutes
5100-04 CO 150 cc/min 3 minutes
5100-05 H2S 300 cc/min 3 minutes
5100-06 CL2 300 cc/min 3 minutes
5100-07 H2 300 cc/min 3 minutes
5100-10 SO2 300 cc/min 3 minutes
5100-12 NO2 300 cc/min 3 minutes
5100-13 CO 300 cc/min 3 minutes
5100-16 CO 300 cc/min 3 minutes
5100-19 NO 300 cc/min 3 minutes
5100-21 HCL 1,000 cc/min 10 minutes
5100-22 HCN 300 cc/min 3 minutes
5100-25 NH3 300 cc/min 3 minutes
5100-26 HF 300 cc/min 3 minutes
5100-27 ETO 1,000 cc/min 3 minutes
Table 5-1
Calibration Gas Flow Rates
5.3.3.1 HYDROGEN SULFIDE
Hydrogen Sulfide gas must be supplied from a permeation
tube device or from Sierra Monitor Model 9200 series
calibrator.
5.3.3.2 COMBUSTIBLE
For compliance with factory Mutual (FMRC) Approval,
the Sierra Monitor Model 1200-26 is the only Approved
calibration gas delivery device. Apply 50% LEL methane
in air or the calibration concentration of the gas to be
monitored at 100 cc/min using Model 5358-00 or 5358-01
Calibration Adapter and Model 5360-00 Gas Delivery
Fitting. For calibration with a standard gas and cross
reference to a secondary gas, see Appendix D.
NOTE
Cross reference factors are not FMRC approved.
5.3.3.3 OXYGEN
The calibration procedure is different for Oxygen because
zero gas is not required and the sensor will be exposed
only to span gas. This is a single point calibration.
• Either: Deliver calibration gas (clean air - 20.9%
Oxygen through the magnetic head at 100
cc/min for one minute and then remove the air
and the calibration head.
• Or: If the local air is known to be clean leave
the magnetic head in place for one minute and
then remove.
5.3.3.4 TOXIC GAS
Toxic Gas for may be delivered from Sierra Monitor
Model 9200 series calibrator or from appropriate
permeation devices.
Figure 5-1
Model 5358-00 Calibration Adapter