31
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
/
to set emissivity to relatively low for uninsulated connectors
or buss connections or relatively high for insulated connections.
Note:
Conductors are typically smaller than the Thermometers 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 DEFICIENCES
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
MODE
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 1.5m away to scan a 5cm 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.
Turn on the blower (no heat, no cooling) and retest. If test results with the blower on are
different than results with the blower off, this may indicate air leaks in conditioned envelope walls.
The air leaks are caused by duct leaks that create a pressure differential across the conditioned
space envelope.
