Table 3-6. Manometer Troubleshooting

TM 5-6640-213-14

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

1. NO PRESSURE READING.

Pressure is not being applied to either, or both sidesof

Step 1.

the instrument.

Check for plugged or leaking pressure lines. Make

applicable corrections.

Step 2. Atmospheric pressure connection not vented to

atmosphere.

Check atmosphere pressure connection and ensure proper

venting.

Foreign particles in internal passages of the meter are

Step 3.

blocking the flow.

Remove mercury from meter and check internal passages

for foreign particles. Clean instrument as required.

2. HIGH OR LOW PRESSURE READINGS.

Step 1. Check for leaks or obstructions.

Check lines for leaks or obstructions. Make applicable

corrections,

Step 2. Check if tubing and/or mercury may contain foreign

particle matter.

Disassemble and clean instrument. Replace mercury.

Step 3. Check for improper zero setting.

Check zero setting.

Make proper adjustment.