RH CGS-240, Руководство пользователя

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Troubleshoot/Maintenance
CGS-240 Manual 6/15/2021
Page 78 of 148
7.1.5 ANNUALLY
The humidity generator requires annual maintenance actions, which are listed in the sections below.
TEMPERATURE CALIBRATION
Temperature calibration should be performed annually following the instructions in section 5.2 of this manual.
PRESSURE CALIBRATION
Pressure calibration should be performed annually following the instructions in section 5.1 of this manual.
PRESSURE REGULATOR ADJUSTMENT/SERVICE
Important: You must have a supply pressure in order to perform regulator
adjustment.
To gain access to the pressure regulator, remove the upper rear panel. The
pressure regulator and its dial indicator are located behind the chamber.
1) With a small screwdriver, press the red button in and rotate a quarter
turn clockwise to lock it into position. That activates the air flow to the
regulator.
2) Turn the adjusting knob on the pressure regulator counterclockwise
to lower the indicated pressure to 0.
3) Then tare the flow meter using the top right button on the flow meter
front panel.
4) While the pressure regulator knob is counterclockwise, if the threads
appear dry apply a small amount of lubricating grease.
5) Using the knob on the pressure regulator, now turn it clockwise until
the regulator dial indicates approximately 50 - 55 psi if using the
internal air supply or at least 5 psi below your incoming external air
pressure.
6) Adjust the Chamber Fan Box air-bleed to indicate 0.5 l/min (±0.1) on
flowmeter display. Finger tighten the lock ring.
7) Tare the flow meter again as done in step 3.
8) Unlock the red button by rotating a quarter turn counterclockwise.
The indicated pressure on the regulator gauge will slowly drop
towards 0, this is normal.