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TM 9-6685-202-14
Table 1-1. Barometer Data
Type A-1 (Unmodified) - Continued
DATA
VALUE
Capabilities and Limitations
Calibration range
-1000 feet to 200,000
ft altitude.
Atmospheric and pneumatic
0 to 790 mm Hg abs
pressure
Accuracy without charts1
0.2 mm Hg
Accuracy with calibration chart 1
In terms of mercury column
Less than 0.1 mm Hg
(equivalent to 3.5
ft at sea level or
0.00193 psi).
In terms of barometric pressure
Within 0.015 percent
of full scale.
Sensitivity
0.05 mm visual scanning,
using vernier.
Computing - compensating device
correction range.
Temperature value
0to 40(32to
104 )
F
Gravity value
977 to 982 cm/sec 3
Finest degree of correction
0.10 mm Hg
Battery utilized
Two BA-30, type C, dry
cells.
Thermometer range
0to 40 (32to 104 )
C
F
Thermometer accuracy
0.05 (after calibration)
C
1
Manufacturer' specifications.
s
Type A-1 (Modified)
DATA
VALUE
Physical Data
Cubic contents crated,
without spares.
21.3 cu feet
Weight without equipment spares
Weight, empty
39 lbs
Weight, with mercury
45.5 lbs
Weight of mercury
6.5 lbs
Overall Dimensions
Height
42.5 inches
Width of base
10.5 x 10.5 inches
Crated Dimensions
22 x 24 x 70 inches
Capabilities and Limitations
Pressure range
0 to 790 mm Hg abs and differential
Accuracy
.014% of reading .092
mm Hg.
1-9
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