RKI Instruments 35-3000RKA-10 - Manual (Page 22)

22 • 35-3000RK-10 PPM Hexane Sample Draw Detector
7. Connect the humidifier tube from the gas collection bag to the inlet line.
Allow the sample draw pump to draw out any residual gas in the gas collection bag.
8. Close the tubing clamp.
NOTE: This step will cause a low flow alarm.
9. Disconnect the humidifier tube from the inlet line.
10. Connect the humidifier tube from the gas collection bag to the dispensing valve, then
open the clamp.
11. Turn the dispensing valve’s on/off knob counterclockwise to open it. The gas
collection bag begins to fill.
12. Turn the dispensing valve’s on/off knob clockwise to close it when the gas collection
bag appears full.
13. Close the clamp, then disconnect the humidifier tube from the regulator.
14. Open the clamp, then connect the humidifier tube from the gas collection bag to the
sample draw detector’s inlet line.
15. Allow the sample draw detector to draw sample for one minute.
16. Measure the voltage between the B terminal on the detector terminal strip and the -
(negative) terminal on the controller terminal strip as shown below in Figure 5.
Figure 5: Load Voltage Measurement
17. Adjust the load voltage adjust pot until the load voltage is 4.0 V ± 0.1 V.
18. Allow the sample draw detector to draw out any residual gas in the gas collection
bag.
19. Disconnect the humidifier tube from the sample draw detector’s inlet line.
20. If necessary, remove the short inlet line used for this adjustment and re-install the inlet
line.
21. Unscrew the dispensing valve from the calibration cylinder.
Controller Terminal Strip
Load Voltage Pot
Detector Terminal Strip
NOTE: Detector and Controller
Wires Not Shown
W B R
DETECTOR
1-2 Hex
3-4 H2
Gas Select 1
3
4
2
+
PWR / SIG
S
SPAN
ZERO
Measure Load Voltage
Between B and -
Digital
Voltmeter