[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).
Set the
Cal
Value
:
Содержание Druck DPI 620-IS
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