Super Systems 7EK 31080 Calibration Manual - Manual (Page 3)

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A.2) "tH" - FINAL SCALE VALUE
The lower display will show "tH" while "OFF" is shown on the upper
display.
1) Set the calibrator to 60.000 mV (see Fig. 2).
2) Push ▲ or ▼ pushbutton, the upper display will change to "On".
3) After few seconds, start calibration by pushing FUNC
pushbutton. At the end of this calibration routine, the instrument
will go to the next step.
A.3) "t....." - TC INPUT CHECK
The upper display show "t." followed by the measured value in
counts as shown in the following figure:
The "tH" calibration is correct if the indication is equal to "t. 3
0000" + 10 counts.
1) Check the zero calibration, by setting the calibrator to 0.000 mV,
the read-out must be equal to "t. 0 0000" + 10 counts.
2) Check the half scale linearity by setting the calibrator to 30.000
mV. The read-out must be "t. 1 5000" + 10 counts.
NOTE: when it is desired to use a different check point, the
following formula describes the ratio between the signal input
and the instrument read-out (in counts).
Instrument readout (in counts) = input value
60 (mV)
30000 •
3) Push FUNC pushbutton, the instrument will go to the next
calibration group.
B) COLD JUNCTION CALIBRATION
NOTE: make sure that "tL" and "tH" parameters are correctly
calibrated before to calibrate "rJ" parameter.
B.1) rJ - ACTUAL VALUE
The lower display will show "rJ" while the upper display will show
"OFF"
1) Measure the temperature close to terminals 1 and 3 using a
calibrator, for instance, the MEMOCAL (see Fig. 3).
Fig. 3
2) Wait for a few minutes to allow the temperature stabilisation of
the entire system (sensor, calibrator and instrument).
The first pressure of ▲ or ▼ push-button allows to show on the
upper display a read-out value.
3) Using ▲ or ▼ push-button, set a read-out value equal to the
temperature measured by the measuring device (in C° and
tenths of °C).
4) After a few seconds, start the calibration by pushing FUNC
pushbutton. At the end of this calibration routine, the instrument
will go to the next step.
B.2) "rJ" - COLD JUNCTION COMPENSATION CHECK
The upper display will show "rJ." while the lower display will show
the measured cold junction temperature (in C° and tenths of °C).
1) Make sure that the cold junction temperature measured by the
instrument is equal to the value measured by the measuring
device (MEMOCAL).
2) Push FUNC pushbutton, the instrument will go to the next
calibration group.
C) RTD INPUT CALIBRATION
NOTE: make sure that "tL", "tH" and "rJ" parameters are correctly
calibrated before to calibrate this parameter group.
C.1) "PL" - INITIAL SCALE VALUE
The lower display will show "PL" while the upper display will show
"OFF"
1) Make the specific hardware setting as described at paragraph 2.
2) Make a short circuit among the 1, 3 and 4 terminals as shown in
Fig. 4.
Fig.4
3) Push ▲ or ▼ pushbutton, the upper display will change to "On".
4) After a few seconds, start the calibration by pushing FUNC
pushbutton. At the end of this calibration routine, the instrument
will go to the next step.
5) Remove the short circuit from the 1, 3 and 4 terminals.
C.2) "PH" - FINAL SCALE VALUE
The lower display will show "PH" while the upper display will show
"OFF"
1) Connect the instrument under test to the calibrator as shown
in Fig. 5.
Fig.5
2) Set the calibrator to 375.00 Ω.
3) Push ▲or ▼ pushbutton, the upper display will change to "On".
4) After a few seconds, start the calibration by pushing FUNC
pushbutton. At the end of this calibration routine, the instrument
will go to the next step.
C.3) "P." - RTD INPUT CHECK
The upper and lower display show "P." followed by the measured
value in counts.
3
+
_
1
R
TD
1
3
4
Check symbol
Measured or generated
value (in counts)
1
3
4
Check symbol
Measured or generated
value (in counts)