GPI GM001, Owner'S Manual, Page: 13 / 20

13
SYMPTOM PROBABLE CAUSE CORRECTIVE ACTION
A. METER IS NOT 1. Field Calibration not performed properly. Field Calibrate again or select Factory Calibration.
2. Factory Calibration not suitable Perform a Field Calibration according to Calibration Section or
for liquid being measured. select the proper Factory Calibration selection (i.e., gallon or litre).
3. Improper installation of flowmeter. Check for electrical noise, pulsation or swirl in the flow.
4. Flowrates too high or too low. See section on display calibration for flowrates.
B. READOUT FADED 1. Power not connected. Check power supply.
2. Wiring incorrect. Verify connections.
3. Computer defective. Contact the factory.
4. Temperature limits exceeded. Check temperature specifications.
C. NORMAL FLOW- 1. Field Calibration not performed correctly. Field Calibrate again or select Factory Calibration.
2. Computer defective. Contact the factory.
3. Loose wire or mis-wired. Check wiring diagram or cable installation.
4. Sensor not attached to turbine. Check continuity of sensor.
5. Faulty sensor. Contact the factory.
D. LOOP OUTPUT 1. 4 mA / 20 mA setpoints bad or not set. Perform new setpoint procedure for both 4 mA and 20 mA points.
WITHIN NORMAL
RANGE, BUT
INCORRECT
E. LOOP OUTPUT 1. Output response-time setting too short, Select a longer response-time setting.
“BOUNCES” especially for slow input signal.
2. Input connections bad. Check all signal-input connections for intermittent open- or
short-circuits.
F. LOOP-OUTPUT 1. Output response-time setting too long, Select a shorter response-time setting.
STABLE BUT especially for fast input signal.
RESPONSE TIME
TOO SLOW
G. LOOP-OUTPUT OK, 1. 0-5 V output loaded too heavily. Be sure 0-5 V load impedance is at least 1000 ohms (1K Ω ).
2. Wiring incorrect. Verify connections.
H. LOOP OUTPUT 1. Loop not supplying power. Be sure loop power supply is present and working, and has
“STUCK”AT ZERO correct polarity.
2. Loop connections bad. Check all loop connections for open- or short-circuits.
3. Transmitter is faulty. Replace transmitter.
I. LOOP OUTPUT 1. 4 mA / 20 mA setpoints bad or Perform new setpoint procedure for both 4 mA and 20 mA
“STUCK” AT LOW not set. points.
VALUE (Between 1
and 4 mA) RE- 2. No input signal. Verify presence of input signal at terminal block.
GARDLESS OF
INPUT SIGNAL 3. Input connections bad. Check all signal input connections for open- or short-circuits.
4. Unit is faulty. Replace unit.
J. LOOP OUTPUT 1. 4 mA / 20 mA setpoints bad or Perform new setpoint procedure for both 4 mA and 20 mA
“STUCK” AT FULL- not set. points.
SCALE (above
20 mA) REGARD- 2. Short-circuit between Loop (–) Check all Loop and LOCAL-COM circuitry for shorts.
LESS OF INPUT and LOCAL-COM circuits.
SIGNAL
3. Incorrect connection of Hall Hall Effect requires dedicated power supply.
Effect device.
TROUBLESHOOTING
OR BLANK
ACCURATE
RATE BUT METER
DOES NOT COUNT
(Meter comes on
when DISPLAY
button pushed)
ERRATICALLY
(is unstable)
BUT 0-5 V OUTPUT
DOESN’T WORK
(No reading at all,
regardless of input
signal.)