Testing Contactors (Starters); Testing Enclosed Relays; Testing Fuses And Buss Connections; Testing Electrical Connections - Ega Master EGATRONIK Operating Instructions Manual

TESTING CONTACTORS (STARTERS)

1. Press SET to select emissivity. Press
or 0.7 mid level for darkened contacts.
2. Press YELLOW button to select MAX.
3. Measure line and load side of one pole without releasing trigger
4. A temperature difference between the line and load sides of a pole indicate increased resistance
of one point and a contactor may be failing.

TESTING ENCLOSED RELAYS

1. Press SET and then press
relatively high for plastic encased relays or for bakelite enclosed relays or insulated connectors.
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
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
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
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).
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/ to select relatively low emissivity for bright contacts,
/ to set emissivity to relatively low for uninsulated connectors or
/ to set emissivity to relatively high for paper covered fuse body or
/ to set emissivity to relatively low, for metal fuses and caps and
/ to set emissivity to relatively low for uninsulated connectors