20
divided into several segments in order to reach the maximal precision. For example,
when sourcing resistance is calibrated, the span (0-3200)Ω is divided into five segments:
(15-40)Ω, (40-400)Ω, (400-800)Ω, (800-1800)Ω and (1800-3200)Ω, and the calibration
must be operated five times.
Table9- 1 shows the calibrating points of Sourcing functions.
7.3.2 Calibrating Measurement
A steady signal generator is needed for measurement calibrating.
The following example shows how to calibrate mV DC measurement.
(1)
First of all, let the signal generator supply a steady value close to the zero point.
Then the display shows “ZERO”, the EDEKA TC-200 Multi-function process
calibrator will display approximation at the same time.
(2)
When the input is stable, you should enter the exact input value.
(3)
Then, let the EDEKA TC-200 Multi-function process calibrator input full span (100mV)
and the display shows “SCALE”. After the input is stable, you should enter the exact
input value and press
. The display shows “CAL mV OK”.
Table9- 2 shows the calibrating points of Measurement functions.
7.3.3 Calibrating Cold Junction
An accurate temperature measure instrument is needed for Cold Junction calibrating..
The following shows how to calibrate cold junction.
(1)
First of all, enter cold junction calibration mode. The display shows “CAL COLD
JUNC”.
(2)
Enter the exact value by pressing numeric keypads.
(3)
Press
until the display shows “CAL COLD OK” at the bottom-right corner.
CAUTION: In general, Cold Junction is unnecessary due to the high-precision temperature sensor internal. If
necessary, the temperature balance between the sensor and the ambient should be kept.
Содержание EDEKA TC-200
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