Fluke 744 Fluke 744 Users Manual - Page 44

Measuring Temperature, Using Thermocouples - leads

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744 Users Manual Measuring Temperature Using Thermocouples The calibrator supports eleven standard thermocouples, each identified with an alpha character: E, N, J, K, T, B, R, S, C, L, or U. Table 5 summarizes the ranges and characteristics of the supported thermocouples. To measure temperature using a thermocouple, proceed as follows: 1. Attach the thermocouple leads to the appropriate TC miniplug, then to the TC input/output as shown in Figure 13. One pin is wider than the other. Do not try to force a miniplug in the wrong polarization. Note If the calibrator and the thermocouple plug are at different temperatures, wait one minute or more for the connector temperature to stabilize after you plug the miniplug into the TC input/output. 2. If necessary, press M for MEASURE mode. 3. Press t. The display prompts you to select the thermocouple type. 4. Select the desired thermocouple type using the u or d followed by e. 5. If necessary, you can change between °C or °F Temperature Units as follows: a. Press s. b. Press the Next Page softkey twice. c. Use the u and d keys to move the cursor to the desired parameter. Then press either eor the Choices softkey to choose a setting for that parameter. d. Press u or d to move the cursor to the desired setting. e. Press eto go back to the sdisplay. f. Press the Done softkey or sto exit Setup mode. 6. If necessary, you can change between ITS-90 or IPTS-68 Temperature Scale in Setup mode. The procedure is the same as steps a-f above. 34

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744
Users Manual
34
Measuring Temperature
Using Thermocouples
The calibrator supports eleven standard
thermocouples, each identified with an alpha
character: E, N, J, K, T, B, R, S, C, L, or U. Table 5
summarizes the ranges and characteristics of the
supported thermocouples.
To measure temperature using a thermocouple,
proceed as follows:
1.
Attach the thermocouple leads to the appropriate
TC miniplug, then to the TC input/output as
shown in Figure 13.
One pin is wider than the
other. Do not try to force a miniplug in the wrong
polarization
.
Note
If the calibrator and the thermocouple plug
are at different temperatures, wait one
minute or more for the connector
temperature to stabilize after you plug the
miniplug into the TC input/output.
2.
If necessary, press
M
for MEASURE mode.
3.
Press
t
. The display prompts you to select
the thermocouple type.
4.
Select the desired thermocouple type using the
u
or
d
followed by
e
.
5.
If necessary, you can change between
°C
or
°F
Temperature Units
as follows:
a.
Press
s
.
b.
Press the
Next Page
softkey twice.
c.
Use the
u
and
d
keys to move the cursor
to the desired parameter. Then press either
e
or the
Choices
softkey to choose a
setting for that parameter.
d.
Press
u
or
d
to move the cursor to the
desired setting.
e.
Press
e
to go back to the
s
display.
f.
Press the Done softkey or
s
to exit Setup
mode.
6.
If necessary, you can change between
ITS-90
or
IPTS-68 Temperature Scale
in Setup mode. The
procedure is the same as steps a-f above.