TB 9-6625-157-40
EQUIPMENT REQUIREMENTS
calibration procedure. This equipment is issued with Secondary Reference Calibration
Standards Set, NSN 4931-00-621-7878. Alternate items may be used by the calibrating
activity. The items selected must be verified to perform satisfactorily prior to use and must
bear evidence of current calibration. The equipment must meet or exceed the minimum use
between the standard and TI. Where the four-to-one ratio cannot be met, the actual
accuracy of the equipment selected is shown in parentheses.
5. Accessories Required. The accessories required for this calibration are common
usage accessories, issued as indicated in paragraph 4 above, and are not listed in the
calibration procedure.
Table 2. Minimum Specifications of Equipment Required.
Manufacturer and model
Common name
Minimum use specifications
(part number)
MONITOR H-T
Range:
~23C
Fluke, Model 1620A
Accuracy: 0.25 C
Range:
~20-70 % RH
Accuracy: 2.5 % RH
PNEUMATIC PRESSURE Range:
~ 100 kPa
DHI, Model
STANDARD
Accuracy: 0.008% of reading
RPM4A160KP/A160KPAD
THERMOMETER
Thermometer:
Hart Scientific Model 1590 (1590)
Range:
~23C
w/ PRT Model 162C (162C) or
Accuracy: 0.025 C
162CE (162CE)
Readout:
Range:
~23C
Accuracy: ≤0.005 C
MKS, Model 626B and 660
Range:
~5 Pa
VACUUM STANDARD
WITH READOUT1
Accuracy: 2.5% of reading
1 APSL transfer standard with accessories, including PRT insertion plug, Fluke part number 3124607.
CALIBRATION PROCESS
6. Preliminary Instructions
WARNING
To prevent extensive damage to the TI, personnel should
become familiar with the manufacturer's instructions before
the removal and reinstallation of the automatic mass handler,
mass set and the piston cylinder module.
a. The instructions outlined in paragraphs 6 and 7 are preparatory to the calibration
process. Personnel should become familiar with the entire bulletin before beginning the
calibration.
