TB 9-4920-469-24
Table 4. Temperature Accuracy Check (Models TT1200 and TT1200A).
Multimeter indications
TI Applied
(mV dc)
C
Min
Max
25
0.9799
1.0205
100
4.0755
4.1169
200
8.1184
8.1584
300
12.1878
12.2293
400
16.3760
16.4183
500
20.6230
20.6656
600
24.8842
24.9267
700
29.1080
29.1499
800
33.2549
33.2959
900
37.3059
37.3459
1000
41.2561
41.2951
1200
48.8200
48.8565
(11)If the multimeter does not indicate within the corresponding values listed in the
Limits column of table 4, perform b below.
(12) Repeat steps (10) and (11) for the remaining values listed in table 4.
(13) Set TI ON/OFF switch to OFF and disconnect test equipment.
NOTE
See paragraph 12 for adjustment of model TT1200A,
b. Adjustments (Model TT1200 Only)
(1) Connect equipment as shown in figure 1 below.
Characterized
TI Leads Connected to thermocouple
Thermocouple Wire
wire (Red clip to yellow wire and Black
clip to red wire)
Copper Wire
TI
Multimeter
Dewar
Ice
Bath
1 IN
Insert Reference Junction into
ice bath about 1 in from
bottom of Dewar
Figure 1. Adjustment (Model TT1200).
(2) Set TI function switch to TEMP MEASURE.
(3) Set TI PWR switch to ON. Allow at least 10 minutes for TI leads to stabilize.
(4) Adjust TI P1 to achieve display of 000.0 C.
(5) Set TI MV/C switch to MV amb comp.
(6) Adjust TI P8 to achieve display of 00.00 mV.
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