TB 9-5905-229-24
Table 3. Temperature Calibration - Continued.
Applied
Limits (mV dc) Min
Limits (mV dc) Max
80T-150C
-25 C
-28.0
-21.0
0 C
-1.0
1.0
60 C
59.0
61.0
150 C
147.0
153.0
80T-150F
-13 F
-18.4
-7.6
32 F
30.2
33.8
140 F
138.2
141.8
320 F
314.6
325.4
80T-150U and 80T-150UA
-25 C
-28.0
-21.0
0 C
-1.0
1.0
50 C
49.0
51.0
90 C
89.0
91.0
140 C
138.0
142.0
-13 F
-18.4
-7.6
32 F
30.0
34.0
120 F
118.0
122.0
194 F
192.0
196.0
290 F
286.4
293.6
CAUTION
Do not turn off cool/heat source at temperatures higher than
100 C. This may create a hazardous situation. Select a set-
point lower than 100 C and allow the instrument to cool before
turning off.
(6) Set cool/heat source to a low temperature and allow it to cool down.
Deenergize equipment and remove TI and thermometer.
b. Adjustments. For the MIC-11CF, 80T150C, and 80T150F, no adjustments can be
made. Perform technique (1) below for the 80T-150U and technique (2) below for the
80T-150UA.
(1) Adjustments (80T-150U)
NOTE
Output is 1 mV per degree (Celsius or Fahrenheit)
(a) Access the interior of the temperature-to-voltage converter by removing the
bottom case screw and separating the case halves.
(b) Connect the 80T-150U to the multimeter and select mV dc range.
(c) Select the C position of the switch. Immerse the probe tip 2 inches into the
into the Cool/Heat Source thermometer monitored 0 C bath and allow 60 seconds for the
readings to stabilize.
(d) Adjust R3 (fig. 1) to obtain the following reading: 0.00 0.05 mV dc.
(e) Select the F position of the switch and adjust R2 (fig. 1) to obtain the
following reading: 32.0 0.1 mV dc.
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