Human Humalyzer 2000 - Vacuum Adjustment

e,
Rev. B
23
Vacuum Adjustment
To adjust the vacuum, you will need:
Reference vacuum gauge reading at least 18 cm Hg.
(2) 15 cm length of 3.1 mm ID flexible tubing
3.1 mm barbed “tee” fitting
1.
2.
Disconnect the vacuum line (blue Luer fitting) at the rear panel. Open the instrument.
Refer to Figure 9-A. Connect the vacuum gauge as shown. Refer to Figure 9-B.
Locate the pump control PCB. Turn the trimpot on the pump control PCB fully coun-
terclockwise.
Tum on the instrument. Press PURGE and wait until the vacuum pump stops running.
The vacuum gauge should read much less than 18 cm Hg. Slowly turn the trimpot
clockwise until gauge reaches 17.8 cm Hg. When turning the trimpot, pause while the
pump runs to maintain vacuum.
Set the power switch to OFF (O). Disconnect gauge and tubing. Reconnect the waste
bottle.
Humalyzer 2000 Service Manual