72-820 TENMA, 72-820 Datasheet - Page 23

• 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

Model 72-820: OPERATING MANUAL
1.
2.
3.
4.
5.
6.
Remove panels to gain access to coil return bends
or hairpins.
Press SET and then press
high emissivity for copper tube.
Start the refrigeration system.
Aim the Thermometer at coil turn bends/hairpins.
Start recording temperature.
Take temperature of each return bend/hairpin.
l
l
l
All evaporator return bends/hairpins should be
at or slightly above evaporator saturation
temperature from the pressure/temperature
chart.
All condenser return bend/hairpins should be
at or slightly less than condenser saturation
temperature.
If a group of return bends/hairpins do not conform
to expected temperatures, that indicates a
blocked or restricted distributor or distributor
tube.
/
to select relatively
Maintenance
To install or change the 9V battery, open the battery
compartment the battery as shown in Figure 2.
Blow off loose particles using clean compressed air.
Carefully wipe the surface with a moist cotton swab.
The swab may be moistened with water.
Use soap and water on a damp sponge or soft cloth.
To avoid damaging the Thermometer, do NOT
submerge it in water.
Caution
21