Hiniker 8160, Руководство оператора, Страница: 51 / 75

Troubleshooting 49
HM860 FLOWMETER
TROUBLESHOOTING
Make sure direction of flow (arrow on flowmeter)
is correct.
Check flowmeter for debris slowing or stopping
the turbine. For the flowmeter to measure accu
-
rately it must be kept very clean.
For application rates under 5 gallons per minute,
the flowmeter should be mounted vertically with
the flow going up.
Make sure the magnet on the turbine is posi-
tioned under the sensor.
Make sure the sensor is inserted fully into the
meter.
Flowmeter operation may be affected by strong
magnetic fields such as those created by motors
and solenoid valves.
The TEST FLOW input routine may be used to
check for missing pulses or intermittent signals.
Select the TEST FLOW routine under TEST
INPUTS located in the OPTIONS menu. Start
spraying. The console will give an indication of
each pulse received.
The HM860 flowmeter Sensor will output a pulse
each time a pole on a magnet is passed over its
face (sensors end).
To test, plug a known good sensor into the flow
input or momentarily short pins one and two of
the flow input.
Repeat the test working your way to the console
until the faulty component is located.
NOTE: If pin three (12 Volts) is shorted to pin
two (ground) the console will temporally remove
power from the Speed, Flow and Servo connec-
tions to protect itself. To restore power shut off
the console for a minute. Power should be avail-
able the next time the console is turned on.
MAINTENANCE
For all applications, except anhydrous ammonia,
the HM860 FLOWMETER should be thoroughly
flushed with clean water immediately after each
use.
Periodic disassembly and cleaning of the HM860
FLOWMETER is recommended for maximum
lifetime and accuracy. Some chemicals may tend
to curdle or become gummy and may require fre-
quent flushing, especially at low flow rates. Do
not allow the flowmeter to dry out before it has
been thoroughly flushed.
CAUTION: ALWAYS FOLLOW MANU-
FACTURER’S RECOMMENDATIONS
WHEN WORKING WITH CHEMICALS.
NOTE: Use Teflon pipe sealant tape on all
pipe connections. Check all hoses and fit
-
tings for slag or contamination prior to as-
sembly. Slag and pipe sealant (tape) are a
major cause of flowmeter problems.