TB 9-4920-465-24
(3) Set the pneumatic pressure standard no. 1 to absolute mode and psi units and
record the current barometric pressure.
(4) Turn the Blade Check and Fill Unit's PRESSURE REGULATOR fully counter-
clockwise, and the NITROGEN SHUTOFF VALVE to the off position.
(5) Connect compressed gas cylinder to TI NITROGEN SUPPLY INLET. Set the
NITROGEN SHUTOFF VALVE to the on position.
(6) Set the pressure standard no. 1 to gage mode and psi units. Using the pressure
regulator on the Nitrogen bottle and the TIs PRESSURE REGULATOR, apply the
pressure settings for the TI indications in table 3, for 4 and 8 psi. Record the readings on
the pressure standard 1 as well as the BLADE PRESSURE indicator at each point.
(7) Change to pressure standard no. 2 for the 12 psi and above settings. Repeat step
3 for the remaining, settings 12 psi and above.
(8) Calculate the difference at each point according to the following equation:
Error = Pb + (14.70 Pa) Ps
TI Reading + (14.70 - Barometric pressure) - pressure standard.
Pa Barometric pressure in psia from step 3.
Ps Reading from pressure standard at each data point in step 6.
Pb Reading from BLADE PRESSURE indicator at each point in step 6.
(9) The error indication must be within 0.09 psig.
Table 3. Pressure Readings
TI reading
Pressure standard reading
Error
TI indication (psi)
(psi)
(psi)
(psi)
4
8
121
16
20
1Switch
to pressure standard no. 2.
b.
Adjustment. No adjustments can be made.
9. Temperature
a. Performance Check
(1) Remove thermometer from case.
(2) Place TI and standard thermometer side by side in vertical position, using a
support stand. Allow approximately 15 minutes for TI to stabilize.
(3) Compare indication of TI and standard thermometer.
(4) The reading must be within 4 F. If TI reading exceeds the standard
thermometer by more than 4 F replace the TI's thermometer.
b. Adjustment. No adjustments can be made.
