Badger Meter Disc Meter - Manual (Page 8)

Recordall® Industrial Nutating Disc Meter
MAINTENANCE
Preventive Maintenance
Preventive maintenance consists of periodic inspection and cleaning procedures . Perform the procedures at regular intervals
and correct any defects before resuming operation of the meter .
Periodic Inspection
1 . Visually inspect the meter and teh accessory for missing hardware, loose connections, broken register glass,
damaged wiring, or other signs of wear or deterioration . Repair or replace components as required .
2 . Verify the proper flow rate and pressure for meter . A loss in pressure, with the resulting flow rate decrease, may
indicate the meter screen is clogged and requires cleaning .
Cleaning
Clean all dust, dirt, grease, moisture, or other foreign material from the exterior of the meter and the accessory .
Calibration Check and Adjustment
Follow these instructions to perform on-site calibration checks and adjustments .
Accuracy Test
1 . Place a test tank of known volume at the output of the meter .
2 . Fill the test tank to the calibrated level . Make a test run at the same flow rate to be used in the actual operation .
3 . Record the quantity indicated on the accessory .
4 . Repeat the test three times and average the recorded results .
5 . Perform the following calculations to determine the percent of accuracy of the meter-accessory combination .
Qty. Indicated on Accessory
x 100 = Meter Accuracy
Actual Quantity in Test Tank
Example 1.
95 Gallons x 100 = 95% Accuracy
100 Gallons
In this example, the meter-mounted accessory is slow and the reading is low . A calibration adjustment is required to
speed up the accessory .
Example 2.
104 Gallons x 100 = 104% Accuracy
100 Gallons
In this example, the meter-mounted accessory is fast and running high . A calibration adjustment is required to slow
down the accessory .
Page 8 February 2013