thermometer, or a value greater than one scale division of the TI,
whichever is greater.
(2) Adjustments. No adjustments can be made. A correction chart may be
prepared, if requested by the customer.
i. Boiling Point.
(1) Performance Check
(a) Using support stand (B3), arrange appropriate standard thermometer
and TI in vertical position so that each is supported in container without
touching sides or bottom.
(b) Pour water into container (B1) until water level reaches 100,C
(212,F) graduation point or etched immersion line on stem of
thermometer.
(c) Immerse stem of TI to proper depth.
NOTE: Full-immersion type thermometers will be inserted to a depth sufficient to cover
100,C (212,F) graduation. The mercury column must be as near the liquid surface as
possible. Partial-immersion type thermometers will be inserted to the depth of the
immersion line etched on the stem.
(d) Place container on hotplate (B2). Position thermometer and TI for best
advantage and energize the hotplate.
(e) Heat contents to boiling point, or to the desired temperature.
(f) Lift thermometer and TI slightly above waterline to the checkpoints
position. Make a comparison observation of standard and TI and record
the difference.
(g) Repeat (5) and (6) above twice.
(h) Average the three indications recorded in (6) above. The average will
not exceed a value four times greater than the accuracy of the standard
thermometer, or a value greater than one scale division of the TI,
whichever is greater.
(i) De-energize hotplate and remove thermometers.
(2) Adjustments. No adjustments can be made. A correction chart may be
prepared, if requested by the customer.
j. FINAL PROCEDURES
(1) De-energize and disconnect all equipment and replace test instrument within
protective cover.
(2) In accordance with TM 38-750, annotate and affix DA Label 80 (U.S. Army
Calibration System). When the test instrument cannot be adjusted within
tolerance, annotate and affix DA Form 2417 (Unserviceable or Limited Use tag).
8. CALIBRATION PROCEDURE FOR THERMOMETER SETS 7910479 AND ASTM
80-182 (80-211-22); AND THERMOMETERS, FISHER SCIENTIFIC MODELS 15-
142D AND 15-142F AND THERMOMETER ASTM 50F AND THERMOMETER
7913469
a. Test Instrument Identification
This procedure provides instructions for the calibration of Thermometer Sets 7910479
and ASTM 80-182 (80-211-22); AND Thermometers, Fisher Models 15-142D and 15-
142F and Thermometer ASTM 50F and Thermometer 7913469. The manufacturer's
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