Maintenance and Troubleshooting
4–4
PRESSURE SWITCH ADJUSTMENT
100 and 200 Series TOOLS REQUIRED
• 0 to 50 psia pressure meter accurate to ±0.05 psia. (Must be an absolute
pressure meter.) See Appendix B in the sterilizer Service Manual.
• 120VAC volt meter or test lamp.
SHOCK HAZARD: AC line voltage is present on the pressure
switch terminals. Turn OFF power to the sterilizer when
connecting the test lamp and adjusting the pressure switch.
PROCEDURE
1. Remove the cover from the pressure switch.
2. Connect a 120VAC test lamp between the normally closed
contact of the pressure switch and ground.
Figure 4–1. PRESSURE SWITCH ADJUSTMENT (MP-129 A&B)
3. Close and seal the chamber.
4. Using manual mode, pressurize the chamber by turning
ON digital output DO00 (steam to chamber). See the
sterilizer service manual.
5. When the test lamp turns OFF, turn OFF output DO00.
Chamber pressure should read 2 psi above atmospheric.
6. Adjust the pressure switch and recheck the trip point.
WARNING
TEST LAMP
GRND
ADJUSTMENT
SCREW
COMMON
BK
R
NORM
CLOSED
NORM
350545-S
OPEN
To Next Page
Loading...
