Rki-instruments 35-3000RK-LEL/O Uživatelský manuál stáhnout pdf (Strana 14)

10 • 35-3000RK-LEL/O Sample-Draw Detector

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 is correct and secure. Refer to the controller operator’s manual

for connections at the controller.

3. Turn on or plug in the power to the controller, then turn on the controller.

4. Verify that the sample-draw detector’s PILOT light is on.

5. Verify that the controller is on and operating properly. Refer to the controller

operator’s manual.

6. Verify that the flowmeter indicates a flow rate of approximately 1.5 SCFH. If

necessary, use the bypass valve or flow adjust potentiometer to adjust the flow rate.

NOTE: The following step tests for leaks in the sample line. This test will cause a low

flow condition at the sample-draw detector and a fail condition at the controller

on the combustible gas channel. Be sure to put the controller into its calibration

program or disable external alarms before performing this test.

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 and verify that the flowmeter returns to a

normal flow rate.

9. Enable alarms or place the controller in normal operation.

CAUTION: Allow the sample-draw detector to warm up for 15 minutes before you continue with

the next section, “Setting the Zero/Fresh Air Reading”.

Setting the Zero/Fresh Air Reading

CAUTION: If you suspect the presence of combustible gas or an abnormal oxygen concentration

in the monitoring environment, use the calibration kit and the zero air calibration

cylinder to introduce “fresh air” to the sensor and verify an accurate zero setting.

See the Calibration section of this manual for instructions on using a zero air

calibration cylinder for setting the zero reading.

1. Verify that the sample-draw detector is sampling a fresh air environment

(environment known to be free of combustible gas and of normal oxygen

concentration, 20.9%).

2. Verify a reading of 0 %LEL for the combustible channel and 20.9% for the oxygen

channel on the controller display screen for the applicable channel.

If the display reading is 0 % LEL for the combustible channel and 20.9% for the

oxygen channel, start up is complete. The sample-draw detector is in normal

operation. If the display reading is not 0 % LEL for the combustible channel or 20.9%

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Rki-instruments 35-3000RK-LEL/O Uživatelský manuál Strana 14