TCS MODEL 700 METER CALIBRATION

1.

Calculate the percentage increase or decrease of registration required. For example, if a 50 gallon test prover indicates exactly 50 gallons have been run through the meter against a meter registration of 49.7 gallons, the percentage increase of registration would be 0.6%. (3/10's in 50 gallons is 0.6%). If meter registration is less than the test prover measured volume, an increase adjustment is required. If meter registration is greater than the test prover measured volume, a decrease adjustment is required.

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Loosen the screw (#1 on the adjuster parts list, page 15) on the clamping ring (#2). The adjuster barrel (#4) will now be free to rotate.

5.

Each small hash mark corresponds to 0.02% adjustment. Each of the larger numbers on the rotating barrel (#4) corresponds to 0.1%. The large numbers engraved into the adjuster body (#19) correspond to 1%. The entire range of adjustment is 5%, with the meter being set at the factory very close to the middle of this range.

6.

To increase the registered volume, rotate the adjuster barrel (#4) to the left by the percentage increase desired. It is recommended that the barrel be rotated 0.02% more than the desired amount and then backed down to the desired figure. This accounts for any slack present in the adjuster mechanism. In the example above, the barrel would be rotated 16 tick marks on the barrel (15 tick marks x 0.02 =0.3 = 3/10's plus the one tick mark for slack). With the slack removed, the barrel would then be rotated one tick mark back to the right to achieve the final adjustment.

7.

To decrease the registered volume, the adjuster barrel is rotated to the right.

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When calibration is achieved, ensure that the screw and clamping ring are tight, then replace the cover plate.