RKI Instruments GD-70D Series User Manual

- 99 - GD-70D
10-5 Calibrating with a Gas Bag (Calibrating with HCl)
The calibration instructions in this section apply ONLY to the sensors listed in the table below. If your
sensor is not listed in the table below, you will need to follow the instructions outlined in one of the other
calibration sections. The warm up times listed are the minimum times between powering up a GD-70D and
calibrating that GD-70D.
Detection Gas
Range
Calibration Gas/Concentration
Warm Up Time
After Power-Up
BCl3 (Boron trichloride) 0 - 15.0 ppm Hydrogen chloride (HCl): 5 ppm 6 hours
H2Cl2Si (Dichlorosilane) 0 - 15.0 ppm Hydrogen chloride (HCl): 5 ppm 6 hours
HBr (Hydrogen bromide) 0 - 6.00 ppm Hydrogen chloride (HCl): 5 ppm* 24 hours
0 - 9.00 ppm Hydrogen chloride (HCl): 5 ppm* 24 hours
HCl (Hydrogen chloride) 0 - 6.00 ppm Hydrogen chloride (HCl): 5 ppm 6 hours
0 - 15.0 ppm Hydrogen chloride (HCl): 5 ppm 6 hours
SiCl4 (Silicon tetrachloride) 0 - 15.0 ppm Hydrogen chloride (HCl): 5 ppm 6 hours
* May or may not need dilution. In order to figure out if you need to dilute the gas, multiply the gas
concentration listed on your calibration cylinder by the factor listed on the sensor unit at the GD-70D.
The result should be something between 10% and 100% of full scale for the sensor. A value closest to
50% of full scale is ideal but if you can get somewhere between 10% and 100% of full scale without
diluting, that is also fine.
Calibration Equipment – No Dilution Needed
• 6 LPM fixed flow regulator (RKI Instruments, Inc. recommends that you dedicate one regulator for
use with HCl and that you not use that regulator for any other gas)
• Gas bag with tubing and a hose clamp
• Calibration cylinder of appropriate concentration
Calibration Equipment – 1:1 Dilution Needed
• 6 LPM fixed flow regulator (RKI Instruments, Inc. recommends that you dedicate one regulator for:
use with HCl and that you not use that regulator for any other gas)
• Gas bag with tubing and a hose clamp
• Calibration cylinder of appropriate concentration
• 100% N2 cylinder
Preparing for Calibration – No Dilution Needed
Filling the Gas Bag
RKI Instruments, Inc. recommends screwing a nitrogen calibration cylinder onto the fixed flow regulator
and purging the regulator for 30 seconds before starting the calibration process.
1. If not already installed, install the hose and hose clamp on the gas bag.
2. Open the hose clamp on the gas bag.
3. Be sure the gas bag is completely empty.
4. Connect the tubing on the gas bag to the fixed flow regulator’s hose barb fitting. Be sure the regulator’s
knob is in the closed position.
5. Screw the fixed flow regulator onto the calibration cylinder.
6. Turn the regulator’s knob counterclockwise.
7. Allow the gas to flow until the gas bag is about half full.
8. Turn the regulator’s knob clockwise to close it.
9. Close the hose clamp.
10. Disconnect the gas bag from the regulator.
11. Unscrew the regulator from the calibration cylinder.
12. Continue to Entering Calibration Mode below.

RKI Instruments GD-70D Series Specifications

General

Brand	RKI Instruments
Model	GD-70D Series
Category	Gas Detectors
Language	English