Procedure To Re-Calibrate Flow Meter - Raven Spra-Coupe SCS 460 Operator's Manual

PROCEDURE TO RE-CALIBRATE FLOW METER

1) Enter a METER CAL number of 10 [38] in the key labelled
2) Enter a TOTAL VOLUME of 0 in the key labelled
3) Switch OFF all booms.
4) Remove a boom hose and place it into a calibrated 5 gallon [19 liter] container.
5) Switch ON appropriate boom switch (for the hose that was just placed into the 5
gallon container) and the MASTER switch.
6) Readout in TOTAL VOLUME is the new METER CAL number. This number should be within
+/- 3% of the calibration number stamped on the tag of the Flow Meter.
7) Repeat this procedure several times to confirm accuracy. (Always "zero out" the
TOTAL VOLUME display before retesting).
NOTE: For greatest precision, set METER CAL to 100 and pump 100 gallons (378
liters) of water.
8) To verify Flow Meter calibration, fill applicator tank with a predetermined amount
of measured liquid (i.e. 250 gallons).
INTO APPLICATOR TANK.
conditions.
predetermined amount of measured liquid by more than +/- 3%, complete the following
calculation:
EXAMPLE:
METER CAL
TOTAL VOLUME
Predetermined amount of measured liquid
Corrected METER CAL
Corrected METER CAL
9) Enter corrected METER CAL before resuming application.
APPENDIX 5
Empty the applicator tank under normal operating
If the number displayed under TOTAL VOLUME is different from the
=
Predetermined amount of measured liquid
ENGLISH UNITS:
= 720 x 260 = 749
250
= 749 [198]
Pump exactly 10 gallons [38 liters].
DO NOT RELY ON GRADUATION NUMBERS MOLDED
= 720 [190]
= 260 [984]
= 250 [946]
METER CAL x TOTAL VOLUME
METRIC UNITS:
= [190] x [984] = [198]
39
[946]