TB 9-6685-316-50
(11) Repeat (6) and (7) above, using low-range piston assemblies and 0-5000 psi
gage to test capacity of system at 2,000 psi.
b. Adjustments. No adjustments can be made.
13. Mansfield and
Green, Model
10-10525 or Ametek Model R100 Calibration
(Standard and TI Having Same Design Gravity).
a. Performance Check
(1) Install low-range pistons in cylinder housing of TI and deadweight pressure
tester (A4) (standard).
(2) Connect equipment as shown in figure 4, using standard 0-600 psi pressure
gage (part of A4).
(3) Place the standard and TI 95-psi weights on their respective weight tables.
(4) Apply pressure to equipment setup, using handpump while slowly rotating
weights clockwise until one or both units are floating. Monitor nominal pressure using
pressure gage indication. (Nominal pressure is 100 psi.)
(5) Balance will be obtained when weights are rotating clockwise an one or both
units with bottom surface of weight table 1/4 inch above either the TI or standard
cylinder housing.
(6) Place a 1/8, 1/32 and 1/64 oz weight from avoirdupois weight set (A2) on the
weight table that is floating. If this weight table falls and the other rises the TI is within
tolerance. If the opposite tables does not rise, the TI is not within tolerance.
CAUTION
Bleed pressure from system prior to removal of any weight.
(7) Replace the standard and TI 95-psi weights with one 10-psi weight on each
weight table. Repeat (4) through (6) above.
(8) Replace the TI 100-psi weight with a different 100-psi weight. (Do not replace
the standard 100-psi weight.) Repeat (4) through (6) above. Repeat this process until
each 100-psi weight has been checked.
(9) Replace the standard and TI 100-psi weight with one 20-psi weight on each
weight table. Repeat (4) and (5) above.
(10) Place a 1/32 and 1/64 oz weight from avoirdupois weight set (A2) on the weight
table that is floating. If this weight table falls and the other rises, the TI is within
tolerance. If the opposite table does not rise, the TI is not within tolerance.
(11) Replace the TI 20-psi weight with a different 20-psi weight. (Do not replace
the standard weight.) Repeat (4), (5), and (10) above. Repeat this process until each 20-
psi weight has been checked.