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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
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
and insulated buss connections.
6. Press YELLOW button 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
connectors or buss connections or relatively high for insulated connections.
Note
Conductors are typically smaller than the Thermometerís 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 connect, wire
nut, buss connection, or lug).
SCANNING WALLS FOR AIR LEAKS OR INSULATION
Deficiencies
1. Turn off heating, cooling, and blower.
2. Press SET to select emissivity. Press / to select emissivity relatively high for painted
surfaces or
window surfaces.
3. Press YELLOW button to select MIN when opposite side of wall is at lower temperature
and or select MAX when opposite side of wall is at higher temperature.
4. Measure an interior partition wall surface temperature.
Do not release the trigger. Record this temperature as your baseline (or benchmark) for a
'perfectly' insulated wall.
5. Face the wall to be scanned. Stand 1.2m away to scan a 10cm spot on the wall.
6. Scan horizontal rows of wall from top to bottom, or horizontal rows of ceiling from wall
to wall. Look for greatest deviations from baseline temperature to identify problems. This
completes the insulation test scan.
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/
to set emissivity to relatively high for paper covered fuse
/
to set emissivity to relatively low, for metal fuses and caps
/
to set emissivity to relatively low for uninsulated
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