[EN] English - K0460 Calibration procedures 10-13
Issue 1
10.13 Procedures
(CH1): CJ (measure)
Note: Do the TC mV (measure) calibration (Section 10.12)
before the cold junction calibration.
1. Connect the applicable calibration equipment in Table 10-1;
for example: see Section 3.2.10 (Example procedure:
Measure or simulate a thermocouple (or TC mV)),
example A.
2. Set-up the DPI 620-IS calibrator:
Function = TC (measure);
TC Type = K Type
CJ Compensation; Mode = Automatic
3. Set the reference unit temperature: 0°C
4. Let the equipment get to a stable temperature
(minimum: 2 hours since the last power on).
5. Record these values:
• the thermocouple temperature given on the reference unit,
T (actual).
• the thermocouple temperature given on the calibrator,
T (measured).
• the CJ temperature given on the calibrator, CJ (measured);
for example: in Section 3.2.10 example (A),
CJ (measured) = 32.66.
6. Calculate the CJ (Cal Value) as follows:
CJ (Cal Value) = CJ (measured) - T (actual) + T (measured)
7. Use the calibration menu (Section 10.3) to do a one-point
calibration for the CJ (measure) function.
When the screen shows “Sampling complete. ... ”, set the
correct Cal Value = CJ (Cal Value) in step 6.
8. To make sure the calibration is correct, select the TC
(measure) function; see Section 3.2.10, (A).
9. Make sure the DPI 620-IS calibrator gives a thermocouple
temperature that agrees with the temperature on
the reference unit ±0.1°C (0.2°F).
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