Super Systems 7EK 31080 Calibration Manual

0831106 Rev.0

INSTRUMENT CALIBRATION
PROCEDURES

1 GENERAL GUIDELINES FOR CALIBRATION

For an accurate calibration it is necessary to proceed as follows:
a) - The instrument under calibration should be mounted in its case in

order to keep the internal temperature stable.

b) - The ambient temperature should be stable.

Avoid any drift due to air-conditioning or others.
c) - The relative humidity should not exceed 70%.
d) - The instrument must be in ON condition from 20 minutes at least.
e) - Operate, possibly, in an environment with no electromagnetic

disturbances.
f) - During calibration, connect to the instrument one input at a time.
g) - Before to execute each calibration, be sure that the specific

hardware setting has been made (see "Preliminary hardware

setting" paragraph).

For this calibration procedure it is necessary to use calibrators with
the following accuracy and resolution:

ACCURACY

1) For current input:

2) For voltage input : + 0.005% output + 0.001% range + 5 µV

3) For TC input: + 0.005% output + 0.001% range + 5 µV

4) For RTD input:

5) For cold junction compensation: better than 0.1 °C

RESOLUTION

1) For current input: 0.5 µA

2) For voltage input: 100 µV

3) For TC input: 1 µV

4) For RTD input: 10 mΩ

5) For cold junction compensation: better than 0.1 °C

2 PRELIMINARY HARDWARE SETTINGS

INPUT TYPE SELECTION

1) Remove the instrument from its case.

2) Set J1according to the desired input type.

3) Set the dip switch V1to the open condition (see fig. 1).

4) Re-insert the instrument in its case.

+ 0.025% output + 0.0025% range + 0.01 µA

+ 0.02 % + 0.0025 Ω/decade.

3 CALIBRATION PROCEDURE

3.1 FOREWORD

Calibration parameters are divided in groups.
Each group is comprised of two parameters (initial and full scale
values) plus a specific calibration check.
Follows a complete list of the "calibration groups" is reported.

A) TC input
B) Cold junction
C) RTD input
D) Linear mA input
E) Linear 5 V input

F) Linear 10 V input
G) Current transformer input calibration
H) Default calibration data loading

3.2 HOW TO PROCEED

1) Switch on the instrument the display will show "CONF".

2) Push the
the lower display is blank.

3) Push the FUNC pushbutton to display the first calibration group on
the lower display. Depress FUNC pushbutton more times until the
desired calibration group is reached.

GENERAL NOTES ABOUT CALIBRATION PROCEDURE:

1) During calibration procedure, when the initial or full scale value of a
group is selected and the upper display shows "OFF", pushing the
FUNC pushbutton the instrument will jump to the next parameter
for checking without to modify the previous calibration setting.
In this way it is possible to recalibrate only the desired input or
output.
It is also possibe to make a check of one or more calibration group
without to remake the specific calibration.
Pushing the MAN pushbutton it is possible to scroll back through
the calibration parameters without to memorize the setting.

2) During calibration procedure the serial communication interface
and the time out will be disabled.

A) TC INPUT CALIBRATION

pushbutton, the upper display will show "CAL" while

1JtupnI

Type 1-2 3-4 5-6 7-8 9-10

TC-RTD open close open open open

60 mV open close open open open

5 V close open close open open

10 V open open close open open

20 mA open open open close close

NOTE: the not used jumper can be placed on pin 7-9

2 4 6 8 10

1 3 5 7 9

V1

Fig. 1

J1

A.1) "tL" - INITIAL SCALE VALUE

The lower display will show "tL" while the upper display will show
"OFF"

1) Ma

ke the specific hardware setting as described at paragraph 2.

2) Connect the instrument under test to the calibrator as shown in

Fig. 2.

_

3

+

1

Fig.2

3) Set calibrator to 0.000 mV.

4) Push ▲ or ▼ pushbutton, the upper display will change to "On".

5) After few seconds, start the calibration by pushing the FUNC

pushbutton. At the end of this calibration routine, the instrument
will go to the next step.

2

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:

Check symbol

The "tH" calibration is correct if the indication is equal to "t. 3
0000"

1) Check the zero calibration, by setting the calibrator to 0.000 mV,

2) Check the half scale linearity by setting the calibrator to 30.000

+ 10 counts.

the read-out must be equal to "t. 0 0000"

mV. The read-out must be "t. 1 5000"
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) =

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).

Measured or generated
value (in counts)

+ 10 counts.

+ 10 counts.

input value

60 (mV)

30000•

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"

ke the specific hardware setting as described at paragraph 2.

1) Ma

2) Make a short circuit among the 1, 3 and 4 terminals as shown in
Fig. 4.

1

3

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.

1

+

1

RTD

_

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
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.

measured by the measuring device (in C° and

3

4

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 t
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.

Check symbol

his calibration routine, the instrument

Measured or generated
value (in counts)

3

The "PH" calibration is correct if the indication is equal to "P. 3
0000"

+ 10 counts.

1) Check the zero calibration, by making the short circuit as
described at point C.1, the read-out must be equal to "P. 0 0000"
+ 10 counts.

2) Remove the short circuit.

3) Connect the calibrator as shown in Fig. 7.

4) Check the linearity by setting the calibrator to 125.00 Ω. The
read-out must be "P. 1 0190"

5) Set the calibrator to 250.00 Ω. The read-out must be "P. 2
0189"

6) Push FUNC pushbutton, the instrument will go to the next

+ 10 counts.

calibration group.

+ 10 counts.

E) 5 V INPUT CALIBRATION

E.1) "5UL" - INITIAL SCALE VALUE

The lower display will show "5UL" while the upper display will show
"OFF"

1) Make the specific hardware setting as described at paragraph 2.

2) Connect the instrument under test to the calibrator as shown in
Fig. 7.

_

3

+

1

D) mA INPUT CALIBRATION

D.1) "nAL" - INITIAL SCALE VALUE

The lower display will show "nAL" while the upper display will show
"OFF"

1) Make the specific hardware setting as described at paragraph 2.

2) Connect the instrument under test to the calibrator as shown in
Fig. 6.

_

3

+

1

Fig. 6

3) Set calibrator to 0.000 mA.

4) Push ▲or ▼ pushbutton, the upper display will change to "On".

5) 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.

D.2) "nAH" - FINAL SCALE VALUE

The lower display will show "nAH" while the upper display will show
"OFF"

1) Set the calibrator to 20.000 mA.

2) Push ▲ or ▼ pushbutton, the upper display will change to "On".

3) After a few seconds, start the calibration by pushing FUNC
pushbutton. At the end of this calibration rou
will go to the next step.

D.3) "nA." - mA INPUT CHECK

The upper and lower show "nA." followed by the measured value in
counts.

Check symbol

The "nAH" calibration is correct if the indication is equal to "nA.
3 0000"

+ 10 counts.

1) Check the zero calibration, by setting the calibrator to 0.000 mA,
the read-out must be equal to "nA. 0 0000"

2) Check the linearity by setting the calibrator to 10.000 mA , the
read-out must be "nA. 1 5000"
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).

+ 10 counts.

Instrument readout (in counts) =

3) Push FUNC pushbutton, the instrument will go to the next
calibration group.

tine, the instrument

Measured or generated
value (in counts)

+ 10 counts.

input value

20 (mA)

30000•

Fig.7

3) Set calibrator to 0.000 V.

4) Push ▲ or ▼ pushbutton, the upper display will change to "On".

5) 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.

E.2) "5UH" - FINAL SCALE VALUE

The lower display will show "5UH" while the upper display will show
"OFF"

1) Set the calibrator to 5.000 V.

2) Push ▲ or ▼ pushbutton,

3) 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.

E.3) "5U." - 5 V INPUT CHECK

The upper and the lower displays show "5U." followed by the
measured value in counts.

Check symbol

The "5UH" calibration is correct if the indication is equal to "5U. 3

+ 10 counts.

0000"

1) Check the zero calibration, by setting the calibrator to 0.0000 V,
the read-out must be equal to "5U. 0 0000"

2) Check the linearity by setting the calibrator to 2.500 V The read­out must be "5U. 1 5000"
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) =

3) Push FUNC pushbutton, the instrument will go to the next
calibration group.

F) 10 V INPUT CALIBRATION

F.1) "10UL" - INITIAL SCALE VALUE

The lower display will show "10UL" while the upper display will
show "OFF"

1) Make the specific hardware setting as described at paragraph 2.

2) Connect the instrument under test to the calibrator as shown in
Fig. 8.

_

3

+

1

Fig.8

the upper display will change to "On".

Measured or generated
value (in counts)

+ 10 counts.

+ 10 counts.

input value

5 (V)

30000•

4

3) Set calibrator to 0.000 V.

4) Push ▲ or ▼ pushbutton, the upper display will change to "On".

5) 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.

F.2) "10UH" - FINAL SCALE VALUE

The lower display will show "10UH" while the upper display will
show "OFF"

1) Set the calibrator to 10.000 V.

2) Push ▲ or ▼ pushbutton, the upper display will change to "On".

3) 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.

F.3) "10U." - 10 V INPUT CHECK

The upper and the lower displays show "10U." followed by the
measured value in counts.

Check symbol

The "10U." calibration is correct if the indication is equal to "10U.3

+ 10 counts.

0000"

1) Check the zero calibration, by setting the calibrator to 0.000 V,
the read-out must be equal to "10U.0 0000"

2) Check the linearity by setting the calibrator to 5.000 V The read­out must be "10U.1 5000"
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).

+ 10 counts.

Instrument readout (in counts) =

3) Push FUNC pushbutton, the instrument will go to the next
calibration group.

G) CURRENT TRANSFORMER INPUT CALIBRATION

G.1) "ct.L" - INITIAL SCALE VALUE

The lower display will show "ct.L" while the upper display will show
"OFF"

1) Made the specific hardware setting as described at paragraph 2.

2) Connect the instrument under test to the calibrator as shown in
Fig. 9.

5

6

Measured or generated
value (in counts)

+ 10 counts.

input value

10 (V)

mA AC

Generator

30000•

G.3) "ct." - CURRENT TRANSFORMER INPUT CHECK

The upper and the lower displays show "Ct." followed by the
measured value in counts.

Check symbol

The "ct.H" calibration is correct if the indication is equal to "ct. 0
1000"

+ 10 counts.

1) Check the zero calibration, by setting the calibrator to 0.00 mA
AC, the read-out must be equal to "ct. 0 0000"

2) Check the linearity by setting the calibrator to 25.00 mA AC. The
read-out must be "ct. 0 0500"
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).

+ 10 counts.

Instrument readout (in counts) =

3) Push FUNC pushbutton, the instrument will go to the next
calibration group.

H) DEFAULT CALIBRATION PARAMETER LOADING.

A complete and consistent set of calibration parameters is memorized
in the instrument. These data are theoretical data and are used only
to clear all calibration memory but after a default calibration data
loading it is necessary to make all calibrations.

When is desired to clear all calibration memory proceed as follows:
a) The upper display will show "CAL" while the lower display is blank.
b) Push the▼ push-button, the lower display will show the firmware

version.

c) Push and keep depressed the ▼ push-button again and push the

▲ push-button, the lower display will show "dFLt".
d) Push ▲ or ▼ pushbutton, the upper display will change to "On".
e) Push the FUNC push-button, the upper display will show:

Then the upper display will show CAL again and the default calibra­tion parameter loading procedure is ended.

Measured or generated
value (in counts)

+ 10 counts.

input value

50 (mA AC)

1000•

WARNING: After default calibration data loading, it is
necessary to remake all instrument calibrations.

Fig.9

3) Set calibrator to 0.00 mA AC.

4) Push ▲ or ▼ pushbutton, the upper display will change to "On".

5) 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.

G.2) "ct.H" - FINAL SCALE VALUE

The lower display will show "ct.H" while the upper display will show
"OFF"

1) Set the calibrator to 50.00 mA AC.

2) Push ▲ or ▼ pushbutton, the upper display will change to "On".

3) 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