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14 Appendix: RLDS
Calibration
14.1. Calibration Check
The RLDS provides for the continuous monitoring of
refrigerant gas levels in up to 16 separate test zones or
channels. The instrument can be programmed to
monitor a variety of refrigerants and independent leak
(small), spill (medium), and evacuation (large) levels
may be designated for each zone. Below are the steps
for testing the calibration or gas verification of the
RLDS unit using a gas verification kit and reference
gas cylinder to measure the calibration of the unit.
14.1.1. Testing with Gas Verification
Kit
Materials Required
• Reference gas cylinder
• Variable flow regulator
• RLDS unit
Steps
1. Go to Step 3 if the RLDS is powered up and
communicating. Verify that the RLDS is
communicating on power up: In the upper left
corner of the RLDS screen, the message
CHECK NODE will display first. When the
unit is communicating properly, CHECK
NODE will be replaced by the name pro-
grammed into the unit.
2. When the unit is communicating normally, it
will be in warm-up mode. Allow the warm up
cycle to complete before proceeding to the next
step (approximately 15 minutes.).
3. Connect:
• The variable regulator (P/N 275-0283) to
the reference gas cylinder.
• The 3/16" tubing to the output of the
regulator.
4. Disconnect the existing tubing from Zone 1 on
the RLDS.
5. From the RLDS Main menu, press the Enter
Calibration Check
button and select System Setup.
1.
From the SETUP menu, select SYSTEM.
2.
Navigate to Zone Hold and set to 15 minutes.
3.
Select ReZero Mode and change to Auto.
4.
Return to the Main Setup by pressing the
ESC button.
6. Enter the Zones menu from the Main Menu. In
Zone 1:
5.
Select Refrigerant and change the selection
to match the type of refrigerant located on the
reference cylinder.
6.
Select Distance and change to 5 ft.
7.
Return to the System Menu by pressing the
ESC button twice.
7. From the RLDS System Menu, press the button
that corresponds to Zones on the menu to go
into the Zone View Menu.
8.
Select the zone at the top level screen.
9.
Press and hold down the ENTER key until
the unit beeps. The word HOLDING will
blink in the status box.
10. While in the hold mode, further investigation
of the zone's status can be made by
navigating to that zone's Setup Screen 1.
11. To release the zone from the Hold Mode,
press and hold down the ENTER key until
the unit beeps and the screen display returns
to normal.
8. Arrow over to System Setup.
Enter the Diagnostic screen by pressing DIAG.
9. Verify that the unit is not in a purge cycle. This
can be done by verifying the airflow in Zone 1.
Review and record the pressure (PRES)
reading in the diagnostic screen. If the unit is in
a purge cycle, wait until PURGING stops
flashing and then review and record the PRES
reading in on the diagnostic screen.
10. Connect the tubing from the reference flow
regulator to Zone 1 on the manifold of the
RLDS.
NOTES:
• The RLDS Fault LED may illuminate until
gas starts to flow from the reference cylinder
to the RLDS. The pressure should be below the
original reading. If the reading does not drop,
Appendix: RLDS Calibration • 69
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