RKI Instruments GD-70D Series User Manual

GD-70D - 100 -
Preparing for Calibration – 1:1 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 6LPM 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. Allow the gas to flow for 7 seconds.
7. Turn the regulator’s knob clockwise to close it.
8. Clamp down on the hose clamp to prevent the release of gas from the gas bag.
9. Remove the gas bag from the regulator.
10. Unscrew the regulator from the calibration cylinder and screw it onto a 100% N2 cylinder.
11. Connect the gas bag tubing to the regulator’s hose barb fitting.
12. Open the hose clamp on the gas bag.
13. Turn the regulator’s knob counterclockwise. Allow the gas to flow for 7 seconds.
14. Turn the regulator’s knob clockwise to close it.
15. Clamp down on the hose clamp to prevent the release of gas from the gas bag.
16. Remove the gas bag from the regulator.
17. Unscrew the regulator from the 100% N2 cylinder.
18. The gas concentration in the gas bag is half of what is listed on the HCl calibration cylinder.
19. Continue to Entering Calibration Mode below.
Entering Calibration Mode
GAS IN Fitting
Remove the dust filter and the sample line from the GAS IN fitting’s tubing
stub.
Accessing Maintenance Mode
From Detection Mode, press and hold the MODE key for three seconds.
(For GD-70D-EA units, the Maintenance Mode screen is item 1-9.)
0.0ppm
SIH4
↓
↓
1-8.M MODE
Press the ▲ key until the Maintenance Mode screen displays.
1- 8
M MODE
MAINTENANCE
↓
↓
User Mode
In "1-8.M MODE", press the SET key.
1- 8
M MODE
MAINTENANCE
↓
↓
Then press and hold the SET key again for three seconds.
- - - -
M MODE
MAINTENANCE
↓
↓

RKI Instruments GD-70D Series Specifications

General

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