Servicing Information; Functionality Check; Performance Verification - Omega Engineering 873C Operator's Manual

SERVICING INFORMATION
This section contains information needed to maintain the Models
873C and 873R The following information is included: functional
check, performance verification, disassembly instructions, battery in-
stallation/replacement, calibration, probe matching, troubleshooting,
parts list, schematic diagram and component layout.
WARNING
The information presented in this section is in-
tended for use by qualified personnel only. Turn off
the power and remove all probes from the instru-
ment before replacing the battery.
FUNCTIONALITY CHECK
At room temperature hold the tip of a probe sensor between your
thumb and index finger. A reading between 25°C and 40°C (77°F and
104°F) should be observed to confirm functionality of the instrument.
PERFORMANCE VERIFICATION
Accuracy Check
1. Prepare a distilled water ice bath or use an OMEGA* TRC III Ice
Point Reference Chamber.
2. Connect a TC probe to the input jack of the instrument.
3. Immerse the TC probe into the TRC III or distilled water ice bath
and allow 10 minutes for thermal stabilization,
4. Turn on the instrument and use Table 1 to verify that the readings
on each range are within specifications.
Table 1. Performance Verification
Range
200
1000
2000
873°C
0.0 ± 1°C
0 ± 1°C
873°F
32,0 ± 2°F
32 ± 2°F