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SULFURYL FLUORIDE MANUAL REV C PAGE 10 OF 23 04/07/11
CALIBRATION
Note: Should be done every 3 months or more frequent. Some companies require
monthly calibration.
The instrument is calibrated by introducing, a known concentration of Sulfuryl
Fluoride gas (5 ppm), and adjusting the SPAN control to correspond to the known
analysis of the gas.
NOTE
: New or replacement sensors may require approximately 24 hours to stabilize prior to
zeroing.
With the unit turned on and sufficiently warmed up with the READY light
illuminated, zero the analyzer with the
ZERO
control. Fill a sample bag with Sulfuryl
Fluoride standard, and connect it to the inlet, allowing the gas to flow for at least 3
minutes.
DO NOT ATTEMPT TO INTRODUCE THE VIKANE
STANDARD DIRECTLY FROM A PRESSURIZED SOURCE. A
SAMPLE BAG MUST BE USED.
Do not introduce concentrations higher than 50 ppm.
The CAL control is used to set the meter to a value corresponding to the span
gas concentration. Disconnect the sample bag. Allow to stabilize for 3 minutes.
Repeat procedure two additional times.
The readings should be within
±
2 divisions of the average of your three readings.