RKI Instruments 35-3000RKA-10 - Manual (Page 13)

35-3000RK-10 PPM Hexane Sample Draw Detector • 13
Start Up
This section describes procedures to start up the sample draw detector and place the
sample draw detector into normal operation.
Introducing Incoming Power
1. Complete the installation procedures described earlier in this manual.
2. Verify that the wiring to the controller is correct and secure.
3. Turn on or plug in the power to the controller.
4. Turn on the controller.
5. Verify that the Pilot LED is on.
6. Verify that the flowmeter indicates a flow rate of approximately 1.5 SCFH. If
necessary, use the bypass valve or flow adjust pot to adjust the flow rate.
NOTE: The following step tests for leaks in the sample line. This test may cause a low
flow condition at the sample draw detector and a fail condition at the controller.
7. Verify that the incoming sample line is not leaking. To test the sample line, 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.
8. Remove your thumb from the sample line, verify the flowmeter returns to a normal
flow rate.
Sample Draw Detector Burn-In Period
Once power has been applied to the sample draw detector, it will take several days for the
signal to the controller to stabilize completely. This is the burn-in period. The zero reading
may be slightly above zero after startup and will stabilize in about 5 to 7 days. The sample
draw detector is calibrated at the factory before shipment, so it is not necessary to calibrate
the sample draw detector after startup. If calibration of the sample draw detector after
startup is desired, wait at least 5 days after startup before calibrating the sample draw
detector. A burn-in period of 7 days is recommended. See “Calibration” on page 23 for
calibration instructions.
After the burn-in period, set the zero reading if needed as described in “Calibration” on
page 23.
CAUTION: Do not adjust the zero or span pots for at least 5 days after startup. If the fresh air
reading is high enough to cause unwanted alarms during the burn-in period, adjust
the zero pot only enough to bring the reading below the alarm point.
Setting the Zero Reading
CAUTION: If you suspect the presence of the target gas in the monitoring environment, see
“Calibration” on page 23 for instructions to use the calibration kit and the zero air
calibration cylinder to introduce “fresh air” to the sample draw detector and verify
an accurate zero setting.