RKI Instruments SD-1GH, Operating Manual, Page: 43 / 60

- 43 - SD-1GH
WARNING
Always perform both a zero adjustment and a span adjustment in that order. If they are performed in
a wrong order or only one of them is performed, accurate gas detection cannot be ensured.
WARNING
Be sure the detector is in a fresh air environment before performing a zero adjustment. If the
detector is not in a fresh air environment, a cylinder of zero air must be used to perform the zero
adjustment.
7-3. Performing a Calibration
Perform a zero adjustment and span adjustment as part of a complete calibration.
Materials:
•
Zero adjustment gas
• Span adjustment gas
•
0.5 LPM fixed flow regulator
•
Humidifier tube
Detection Gas Full Scale Calibration Gas/
Concentration
Calibration
Value
C2H5OH (Ethanol) 2000 ppm IPA: 1000 ppm 1300 ppm
5000 ppm IPA: 2000 ppm 2500 ppm
C3H3N (Acrylonitrile) 100 ppm Isobutane: 50 ppm 70 ppm
C5H10O2 (Propyl acetate) 1000 ppm IPA: 500 ppm 500 ppm
C6H6 (Benzene) 100 ppm Isobutane: 75 ppm 35 ppm
500 ppm Isobutane: 1000 ppm 300 ppm
C6H14 (Hexane) 500 ppm Hexane: 360 ppm 360 ppm
3000 ppm Hexane: 1800 ppm 1800 ppm
CH2Cl2 (Methylene chloride) 500 ppm Isobutane: 500 ppm 180 ppm
CH4 (Methane) 2000 ppm Methane: 1000 ppm 1000 ppm
EO (Ethylene oxide) 1000 ppm Hydrogen: 500 ppm 500 ppm
MEK (Methyl ethyl ketone) 500 ppm Hexane: 1100 ppm 200 ppm
R404a 2000 ppm Isobutane: 250 ppm 1000 ppm
* Not all listed cylinders have RKI part numbers (see pg. 57 for cylinder part
numbers). Contact RKI if you need a cylinder that does not have a part number.
<Zero Adjustment "2-1">
Detection Mode
While in Detection Mode,
press and hold the
MENU/ESC key for three
seconds.
User Mode
1-0. ROM/SUM displays.
Scroll to the 1-3 Mode
Switching item.