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TESTDCPWR
++–
–
754
DOCUMENTINGPROCESSCALIBRATOR
TESTDCPWR
++–
–
C-2
C-1
S-3
S-2
S-4
S-1
TC transmitter calibration connection
©2015 Fluke Corporation. Specifications subject to change without notice. 07/2015 6005865a-en
RTD transmitter calibration connection
TESTDCPWR
++–
–
754
DOCUMENTINGPROCESSCALIBRATOR
TESTDCPWR
++–
–
C-2
C-1
S-3
S-2
S-4
S-1
TC transmitter calibration connection
©2015 Fluke Corporation. Specifications subject to change without notice. 07/2015 6005865a-en
RTD transmitter calibration connection
51
•
When simulating a thermo-
couple signal from a simu-
lator, always use the correct
thermocouple wire for the
test, either the exact same
TC wire type or a compati-
ble extension wire type.
•
When simulating tempera-
ture using a calibrator with
active reference junction
compensation, remember
the calibrator actively
compensates for tempera-
ture changes. Changes
in ambient temperature
should be compensated
for automatically.
•
When testing 3-wire RTD
circuits make sure to con-
nect all three wires from
the sourcing RTD simulator
to the device being tested.
Shorting out the compensa-
tion wire at the transmitter
defeats the lead compensa-
tion circuit and introduces
measurement errors.
Additional resources
For more in depth information
about this application check out
these videos and application notes
from Fluke.
Testing, troubleshooting,
calibrating process
temperature devices
webinar
Temperature calibration
application note
Fluke temperature
calibrators deliver
high accuracy, speed,
and convenience
TECH
TIPS
Connect the calibrator to the
device input as shown in
figure B.
Connect the calibrator output
with the right combination
to match the device
configuration (2, 3 or 4-wire).
Use the test procedure at left
for thermocouple testing,
starting at step 3.
Disconnect the process
measurement sensor and
connect the test connection
wires in its place (Figure A).
Connect the mini-connector
from the test wires to the TC
source connection of the cali-
brator.
Connect a DMM or other mea-
surement tool to the tested
device’s mA output.
Verify the devices range or span.
Apply the 0% value with the
simulator and verifywith the
DMM that the output mA value
or voltage is as expected.
Repeat the test, applying the
50% and 100% temperature
signals.
If the measured output of the
device is within limits, the test
is complete. If not, adjust the
device at zero (offset, 0%) and
span (gain, 100%).
Repeat steps 4 and 5 and verify
for a correct response.
To use a thermocouple
simulator to test a device
with a thermocouple input:
STEP
1
STEP
1
STEP
2
STEP
3
STEP
2
STEP
3
STEP
4
STEP
5
STEP
6
STEP
7
To perform the test:
To use an RTD simulator
to test a device with an
RTD input:
51
Temperature Applications