Fluke HYDRA 2620A Manual page 150

HYDRA
Service Manual
3. Reconnect power and switch the instrument ON.
4. Insert the thermocouple and a mercury thermometer (.02 degrees Celsius resolution)
5. Select the temperature function and K thermocouple type for channel 1. Then press
6. The value displayed should be the temperature of the room temperature bath (within
7. The Thermocouple Temperature Accuracy Test is complete. However if you desire
Type Positive Lead
J Iron
C† Tungsten
(5% Rhenium)
b Platinum
(30% Rhodium)
S Platinum
R Platinum
N NICROSIL
T‡ Copper
E Chromel
K Chromel
* American National Standards Institute (ANSI) device negative lead is always red.
** International Electrotechnical Commission (IEC) device negative lead is always white.
† Not an ANSI designation but a Hoskins Engineering Company designation.
‡ An ANSI type T is supplied with the meter.
Thermocouple Type
4-10
If other than a K type thermocouple is used, be sure that the instrument is
set up for the type of thermocouple used.
in a room temperature bath. Allow 20 minutes for thermal stabilization.
MON.
tolerances given in Table 4-4) as measured by the mercury thermometer.
to perform this test on any other Input Module channel (2 through 20) repeat steps 1
through 6 substituting in the appropriate channel number.
Table 4-3. Thermocouple Information
Positive Lead Color
Material
ANSI*
White
White
Gray
Black
Black
Orange
Blue
Purple
Yellow
Table 4-4. Performance Tests for Thermocouple Temperature Function
J
K
N
E
T
Note
Negative Lead
Material
IEC**
Black Constantan
— Tungsten
(26% Rhenium)
— Platinum
(6% Rhodium)
Orange Platinum
(10% Rhodium)
Orange Platinum
(13% Rhodium)
— NISIL
Brown Constantan
Violet Constantan
Green Alumel
Themocouple Temperature Function
1 Year @ 18-28°C
± 0.4°C
± 0.5°C
± 0.6°C
± 0.4°C
± 0.5°C
Usable Range
(°C)
-200 to 760
0 to 2316
0 to 1820
-50 to 1768
-50 to 1768
-270 to 1300
-270 to 400
-270 to 1000
-270 to 1372