Routine
Maintenance
3
STERRAD
®
Sterilization System Routine Maintenance Guide
21
PM Level 2
The STERRAD Sterilizer requires limited maintenance activity after
1500 cycles (PM1) have been completed and more extensive
maintenance after 3000 cycles (PM2). PM2 is performed when the 1500
cycle interval is reached or at one year. Remember: some sterilizers may
have older parts. Also, some parts and subsystems created for the Block
2.0 machines are backwards compatible.
Baratron Zero Shift Test
1. Disconnect the capacitance manometer (Baratron) from the chamber
and attach it to one side of the T-piece.
2. Connect the T-piece to the chamber.
3. Using an extension harness, connect the one end to the Baratron
harness and the other end to the Baratron.
Figure 2. Baratron Zero Shift Test Set-Up.
4. Install the vacuum gauge head to the center of the T-piece. Let the
vacuum gauge warm up for about 15 minutes prior to use.
5. Turn on the vacuum gauge. The display indicates 7.6 X 10
2
torr (760
torr) or 760 microns. In the video, the demonstrator indicates the
major parts of the TM-20 that need to be assembled.
6. Access the Baratron Zero Test and press START.
7. During pump down, the pressure display on the TM 20 drops below
10 mtorr within 15 minutes.
