72-820 TENMA, 72-820 Datasheet - Page 18

• Manufacturer Part Number: 72-820
• Description: INFRARED THERMOMETER, 18°C TO 550°C
• Manufacturer: TENMA

Specifications of 72-820

• Temperature Measuring Range: 18°C To 550°C
• Temperature Tester Type: Thermometer - Infrared
• Accuracy %: 1.8%
• Wavelength Max: 670mm

16
the user may cover the surface (temperature >150
with black electric tape (emissivity of about 0.95). Allow
time for the tape to reach the same temperature as the
object to be measured. Measure and record the
temperature of the tape.
Target the Thermometer to the object to be measured,
adjust the emissivity setting to make it as the same
temperature as the tape. At this time, the Thermometer
emissivity setting is close to the emissivity of the object
to be measured, measurement could be started.
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2.
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4.
Press SET to select emissivity. Press / to select
relatively low emissivity for bright contacts, or 0.7
mid level for darkened contacts.
Press MODE to select MAX.
Measure line and load side of one pole without
releasing trigger.
A temperature difference between the line and load
sides of a pole indicate increased resistance of
one point and a contactor may be failing.
o
C)
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5.
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2.
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5.
Press SET and then press
relatively low for uninsulated connectors or relatively
high for plastic encased relays or for bakelite
enclosed relays or insulated connectors.
Press MODE to select MAX.
Start to scan.
Measure the relay casing, looking for hot spots.
Measure electrical connections on relay terminals
looking for hot spots.
Press SET and then press
relatively high for paper covered fuse body or
insulated connections.
Press MODE to select MAX.
Scan the paper covered length of fuse.
Without releasing the trigger, scan each fuse.
Unequal temperatures between fuses may indicate
voltage or amperage imbalance.
Press SET and then press
relatively low, for metal fuses and caps and insulated
Model 72-820: OPERATING MANUAL
/
/
/
to set emissivity to
to set emissivity to
to set emissivity to