Testing Electrical Connections - Amprobe IR-750 User Manual

2. Press YELLOW button to select MAX.
3. Start to scan.
4. Measure the relay casing, looking for hot spots.
5. Measure electrical connections on relay terminals looking for hot spots.
Testing Fuses and Buss Connections
1. Press SET and then press
paper covered fuse body or insulated connections.
2. Press YELLOW button to select MAX.
3. Scan the paper covered length of fuse.
4. Without releasing the trigger, scan each fuse. Unequal temperatures
between fuses may indicate voltage or amperage imbalance.
5. Press SET and then press
metal fuses and caps and insulated buss connections.
6. Press MODE to select MAX.
7. Scan each end cap on each fuse.
Note: Unequal temperatures or a high temperature indicates loose or corroded
connection through the fuse buss spring clip

Testing Electrical Connections

1. Press SET and then press
un-insulated connectors or buss connections or relatively high for
insulated connections.
Note: Conductors are typically smaller than the Thermometer's spot size.
If the spot size is bigger than the connector, the temperature reading is
the average within the spot.
2. Scan the conductor, moving toward direction of electrical connector
(quick connector, wire nut, buss connection, etc.).
Scanning Walls for Air Leaks or Insulation Deficiencies
1. Turn off heating, cooling, and blower.
2. Press SET to select emissivity. Press
high for painted surfaces or window surfaces.
/ to set emissivity to relatively high for
/ to set emissivity to relatively low, for
/ to set emissivity to relatively low for
/ to select emissivity relatively
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