TB 9-6685-322-50
Figure 1. Temperature calibration - equipment setup.
(4) Add pure water to ice in container until a slush is formed.
(5) Insert TI into ice to proper depth, carefully packing ice around stem.
F = C x 9/5 + 32
C = 5/9(F - 32)
(6) After 3 minutes, lift TI slightly above ice and tap stem gently.
(7) Record TI temperature indication. If TI does not indicate 0 C (32 F) within the
scale deviation limits specified in column four, table 4, perform b below. Table 4 provides
rejection tolerance and acceptable scale deviations.
(8) Remove TI from container and empty water and ice from container.
b.
Adjustments. Prepare a correction chart for TI specifying the scale correction at the ice
point.
Table 4. Temperature Accuracy
Standard thermometer
Acceptable test instrument
indication (c)
Test Instrument
deviations (without
Identifying number
Indication
(rejection tolerance)
corrections or adjustments)
(column 1)
(column 2)
(column 3)
(column 4)
F
C
F
C
Min
Max
0.5
---
53.7
---
49.7
7913471 and
125
ASTM 615 ( 2F)
66.6
64.4
150
94.4
92.2
200
122.2
120.0
250
6
