12 • 35-3001-NS-03 Sample-Draw Pump
8. Connect a contact monitoring device or some other device to the low flow contacts. Do not
exceed the relay ratings below. The ratings are for a resistive load.
See “Low Flow Contact Operation” on page 13 for a description of how to use the low flow
contacts.
Start Up
This section describes procedures to start up the sample-draw pump and place the sample-draw
pump into normal operation.
Introducing Incoming Power
1. Complete the installation procedures described earlier in this manual.
2. Verify that the wiring is correct and secure.
3. Turn on or plug in the power source.
4. Verify that the sample-draw pump’s Pilot LED is on.
5. Use the flow control valve to set the flow rate to 3.0 SCFH. If the inlet and exhaust tubing
restriction does not allow for a flow rate of 3.0 SCFH, a flow rate of 2.0 SCFH still provides
good sensor response at the flow through adapter. RKI Instruments, Inc. does not recommend a
flow rate of lower than 2.0 SCFH. Turn the valve’s knob counterclockwise to increase the flow
and clockwise to decrease the flow.
NOTE:
The following step tests for leaks in the sample line. This test will cause a low flow
condition at the sample-draw pump. Disable the device connected to the low flow
contacts before performing this test.
6. Verify that the incoming sample line is not leaking. To test the sample line, press and hold the
reset switch and plug the open end of the sample line with your thumb. If the flowmeter ball
drops to the bottom of the flowmeter, the incoming sample line is not leaking.
7. Remove your thumb from the sample line, release the reset switch, and verify the flowmeter
returns to a normal flow rate.
8. Follow startup instructions in the detector head manual and flow through adapter manual.
Table 2: Low Flow Relay Specifications
Voltage
Amps
125 VAC
0.6 A
30 VDC
1 A
110 VDC
0.6 A
