TB 9-4920-462-24
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 this
calibration procedure. The following peculiar accessories are also required for this
calibration: NITROGEN TANK, Compressed gas cylinder (7916197) and a VACUUM
SOURCE.
Table 2. Minimum Specifications of Equipment Required
Manufacturer and model
Common name
Minimum use specifications
(part number)
Druck, Model DPI 515
PNEUMATIC
Range:
-7 to -72 PSIG
PRESSURE
Accuracy:
(r0.01% FS 10 psi to 3000 psi)
STANDARD
(r0.03% FS below 10 psi)
CALIBRATION PROCESS
6. Preliminary Instructions
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.
b. Items of equipment used in this procedure are referenced within the text by
common name as listed in table 2.
c. Unless otherwise specified, verify the result of each test and, whenever the test
requirement is not met, take corrective action before continuing with the calibration.
Adjustments required to calibrate the TI are included in this procedure. Additional
maintenance information is contained in the manufacturer's manual for this TI.
d. Unless otherwise specified, all controls and control settings refer to the TI.
7. Equipment Setup
a. Press ON/OFF button to turn on digital pressure display.
b. Turn VACUUM GENERATOR switch to OFF.
c. Turn VACUUM/PRESSURE switch to OFF.
d. Turn VACUUM/PRESSURE REGULATOR control knob CCW until spring
pressure is released.
e. Zero the TI by pressing and releasing HOLD
and MIN/MAX
buttons
simultaneously.
f. Press PRGM to set display units to psi by performing the following:
(1) Choose UNIT SELECT and then press PRGM.
or to choose PSI, and then press PRGM.
(2) Press