TB 9-6685-319-35
CALIBRATION PROCEDURE FOR
PNEUMATIC GAGES
Preliminary instructions ....................................
Equipment setup ................................................
0 to 235 psi pneumatic gages
(0.1 1.0 percent accuracy) ..............................
235 to 1000 psi pneumatic gages
(0.1 1.0 percent accuracy) ..............................
1000 to 5000 psi pneumatic gages
(0.1 1.0 percent accuracy) ..............................
Final procedure...................................................
SECTION I
IDENTIFICATION AND DESCRIPTION
This bulletin provides instructions for the
1. Test Instrument Identification.
calibration of Dial Indicating Pressure Gages (General). Various manufacturers' manuals
were used as the prime data sources in compiling these instructions. The equipment being
calibrated will be referred to as the TI (test instrument) throughout this bulletin.
a. Model Variations. Variations among models are indicated in the text.
b. Time and Technique. The time required for this calibration is approximately 2
hours, using the physical technique.
2. Forms, Records, and Reports
prescribed by TB 750-25.
b. Adjustments to be reported are designated (R) at the end of the sentence in which
they appear. When adjustments are in tables, the (R) follows the designated adjustment.
Report only those adjustments made and designated with (R).
3. Calibration Description TI parameters and performance specifications which
pertain to this calibration are listed in table 1.
Table 1. Calibration Description
Test instrument parameters
Performance specifications
Range and accuracy1
Performance at cardinal points in accordance with
specifications for gage being tested
1In
those cases where accuracy of TI cannot be determined, TI will be certified to one graduation of TI scale.
2
