System Accuracy:
The Impulse Meter and the DFC Console are not adjustable for accuracy; the maximum
possible
System error is –10% on a single unit dispense. The
possible
System error factor decreases
significantly with each increase in dispense units, at five units the maximum
possible
System
error is –2%. The real world System accuracy is usually much better than the
possible
error
factor indicates. Repeatability and accuracy is best when a completed dispense is followed by
another completed dispense.
Advertised meter accuracy is
±
0.65%.
Symptoms Possible
Reasons
Solutions
Operator Error.
Check Pre-Set function - test delivery
and re-train operator.
Fluid Solenoid action impaired by
debris.
De-pressurize the system and clean the
screen.
Ready Light and Fluid Solenoid wired in
Series Circuit.
Rewire in Parallel Circuit.
Control Handle inlet screen clogged
De-pressurize the system and clean the
screen.
Check air supply to pump.
Bleed air from piping.
Check function and wiring of Air
Solenoid, if used.
One or Some Stations always do not
deliver enough product before shutting
off.
Pump not operating properly.
Diagnose pump using the proper
troubleshooting manual.
Operator Error.
Check Pre-Set function - test delivery
and re-train operator.
Pre-Set
amount
too
high.
Re-Authorize a dispense using the
Operation section of this manual.
Wiring to Impulse Meter.
Trace and Repair.
Wire connections at Impulse Meter
Check for tightness, continuity and that
the correct terminals on the Impulse
meter are used.
Impulse Meter incorrectly plumbed.
IN the bottom, OUT the side.
Impulse Meter micro-switch out of
adjustment.
Readjust and test.
Impulse Meter micro-switch defective.
Test and replace.
Impulse Meter rotary cam set screw
loose – cam not turning.
Tighten the setscrew.
Impulse Meter defective.
Replace.
Fluid Solenoid incorrectly plumbed.
IN the side, OUT the bottom.
Fluid Solenoid clogged OPEN with
debris.
De-pressurize the system and clean the
valve parts and screen.
One or Some Stations intermittently
delivers too much product.
Fluid Solenoid defective.
Replace.
Operator Error.
Check Pre-Set function - test delivery
and re-train operator.
System Accuracy limitations.
See the Special Diagnostic Procedures
on accuracy below.
Wiring to Impulse Meter.
Check for tightness and continuity.
Impulse Meter micro-switch out of
adjustment.
Readjust and test.
Impulse Meter micro-switch defective.
Replace.
Impulse Meter rotary cam set screw
loose – cam turning intermittently.
Tighten the setscrew.
Impulse Meter defective.
Not likely – see the special diagnostic
procedures below. If defective replace.
One or Some Stations intermittently do
not deliver enough product.
DFC Console defective.
Not likely – see the special diagnostic
procedures below. If defective replace.
The Fluid Solenoid is hot.
Normal Condition.
Samson Fluid Solenoids are rated for a
110% duty cycle – this means that they
can remain energized indefinitely
without damage
at the rated voltage
.
They do get very hot to the touch after
a couple of minutes ON.
Pump runs when all dispense points
(Stations) are closed.
Thermal Relief Valve (Adjustable
Pressure Relief Valve)
Adjust or replace if defective.
1060
7
Special Diagnostic Procedures
Troubleshooting Continued
Samson Corporation-Swannanoa, NC 28778-
800.311.1047 www.samsoncorporation.com
