Figure 8-30. Attaching Vacuum Test Fixture - Motorola APX 3000 Basic Service Manual

8-24
8.7.6.2 Test Procedure
1. Place the radio in the vacuum test fixture. Ensure the radio position is lay perfectly into the
mold.
2. Pull the knob on the Vacuum Pump to create vacuum. The vacuum test pressure should be
6.6 inHg.
3. Observe the gauge for approximately 2 minutes.
• If the needle falls less than 0.2 inHg, the radio passes the vacuum test.
i. If the seal passes this inspection, this radio is approved for submergibility. No additional
• If the needle falls more than 0.2 inHg, the radio fails the vacuum test and the radio might
leak if submerged. Additional troubleshooting of the radio is required.

Figure 8-30. Attaching Vacuum Test Fixture

Ensure that the vacuum pressure NEVER exceeds 7 inHg.
The radio has pressure sensitive components that can be
damaged if the pressure exceeds this limit.
testing is required.
Disassembly/Reassembly Procedures: Ensuring Radio Submergibility