TeeJet TASC-6500 - Manual (Page 31)

31 M-T 96162
999-1511 TASC 6200/6500
SIZE SUPPLIER CAL.# SIZE SUPPLIER CAL.#
.75 inch (Mid-Tech) 396.9 3.00 inch (Mid-Tech) 5.0
1.00 inch (Mid-Tech) 153.1
1.50 inch (Mid-Tech) 38.8 1.25 inch (Raven) 75.0*
2.00 inch (Mid-Tech) 23.8 3.00 inch (Raven) 16.4*
* Raven flow meters, use the factory calibration number divided by 10. All other flow meters,
use the manufacturers' supplied information regarding the pulses per gallon.
6.9 CALIBRATING THE LIQUID CHANNEL, L
Channel L is typically a liquid control channel and It is necessary to enter a calibrate number in TASC to
get an accurate application. The calibrate number is related to the number of sensor pulses per unit of
material discharged.
A. Use the following switch settings to start the calibration:
Power ON
Mode selector SET-UP
Display selector L & CHEMICALS, VOL. APPLIED
Channel L ON
TASC will display the current calibration number for channel L. Record for reference. The INC/
DEC switch will change this number.
B. If the system uses a flow meter to sense the liquid flow, use the following calibration numbers
for the flow meter you have installed.
C. If channel L uses a rotational rate sensor, an initial calibration number can be calculated as
follows: divide the number of sensor pulses for each pump revolution by the pump output (gal-
lons) per pump revolution (positive displacement pump).
D. Use a catch test (or weight loss test) to fine tune the calibration. Divert channel L output to an
appropriate catch basin through an adjustable pressure relief valve or manually operated throt-
tling valve.
E. Switch the mode selector to OPERATE and use the DEC switch to set the accumulated
gallons to zero.
F. Rotate the display selector to TEST SPEED and turn ON the boom switches. Channel L will
begin to discharge. When sufficient material has been collected, turn OFF the booms and rotate
the display selector to L & CHEMICALS, VOL. APPLIED.
G. TASC will display an indicated amount. Measure the amount actually discharged into the
catch basin. Correct the calibration number using the following formula:
(INDICATED AMOUNT ÷ MEASURED AMOUNT) X CALIBRATION NUMBER = NEW CALIBRA-
TION NUMBER. If the amount read from the console is greater than the measured amount,
the calibration number will increase.