Rki-instruments 35-3000RKA-10 User Manual download pdf (Page 19)

35-3000RK-10 PPM Hexane Sample Draw Detector • 19

8. Lay the new amplifier (already installed on its mounting plate) on the mounting

standoffs and install the retaining screws with the flat washers and split lock washers

but do not tighten them down because you will need to pull out the amplifier for

access to the load voltage adjust pot below.

NOTE: When a sample draw detector is first powered up with a new amplifier, the initial

output may be either high or below zero. Be sure to make arrangements so that

this does not cause unwanted alarms.

9. Turn on power to the controller.

10. Turn on the controller and place it into normal operation.

11. Allow the sample draw detector to run for 3 hours.

12. Remove mounting screws, flat washers, and lock washers that retain the amplifier

plate to pull out the amplifier enough to gain access to the load voltage pot and make

a preliminary setting of the detector load voltage. See “Setting the Detector Load

Voltage” on page 21. This will be a temporary load voltage setting since the load

voltage will need to be set again after the burn-in period as described below.

13. Install the amplifier with its mounting plate using the retaining screws, flat washers,

and lock washers.

14. Perform a preliminary calibration. See “Calibration” on page 23. This will be a

temporary calibration since the detector must burn-in before it can be properly

calibrated.

15. Allow the sample draw detector to burn-in for at least 5 days before you continue

with the next step. A burn-in period of 7 days is recommended.

16. After the burn-in period, set the load voltage as described in “Setting the Detector

Load Voltage” on page 21.

17. After setting the load voltage, calibrate the transmitter as described in “Calibration”

on page 23 of this manual.

Replacing the Hydrophobic Filter

1. Turn off the controller

2. Turn off power to the controller.

3. Open the housing door of the sample draw detector.

4. Note which side of the replacement filter’s body has the “INLET” marking. The barb

on this side must be connected to the line coming from the inlet fitting when it is

installed.

5. If necessary, remove the mounting screws flat washers, and lock washers that secure

the main circuit board and list the board enough to gain access to the hydrophobic

filter.

6. Disconnect the old filter from the rubber elbows on each end of the filter, then remove

the filter from the sample-draw detector.

7. Connect the rubber elbow on the tube from the inlet fitting to the side of the

replacement filter with the “INLET” marking, then connect the other rubber elbow to

the other side of the filter.

8. Lay the replacement filter below the main PCB like the old one.

9. If necessary, reinstall the main circuit board.

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Rki-instruments 35-3000RKA-10 User Manual Page 19

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