Minco TI334
Tel: 1-763-571-3121
♦
Fax: 1-763-571-0927
♦
www.minco.com
6
Troubleshooting
Symptom
Possible cause
Check
Action Required
No display on
the meter
Current loop wiring is
miswired or broken, or
power supply is not on
Check wiring and power supply. Check for the
necessary 2.6 to 2.8 VDC across meter terminals 1
and 2.
Repair wires
Temperature sensor
does not match the
type which the
transmitter requires
Check for the correct temperature sensor type
Replace with correct
temperature sensor
Temperature of the
temperature sensor
may be higher or lower
than the Temptran
TM
transmitter's
temperature range
Verify the sensor’s operating temperature and that
this temperature is within the range of the
transmitter
Replace transmitter with a
range suitable for the
temperatures; recalibrate
meter to match new range
Wiring flaw in the
current loop
Check wires of the 4-20 mA loop
Repair wires
Wiring flaw to the
temperature sensor
Check wires between sensor and transmitter
Repair wires
Meter display
is higher or
lower than
expected and
the reading is
steady
Temperature sensor
may be burned out
Examine the temperature sensor and wires for
damage.
Disconnect sensor from transmitter and ohm the
RTD; 100 ohm Platinum RTD’s are about 110 ohms
at room temperature and 1000 ohm Platinum RTD’s
are about 1100 ohms at room temperature.
Replace bad sensor
“
1
”
displayed
Valid or invalid loop
current signal causing
meter reading to
exceed maximum of
+1999
Figure out what should be displayed based on meter
setup and current flowing in loop. Check for open or
shorted temperature sensor.
An open temperature sensor will not necessarily
cause an overrange display of “
1
”; for example,
when you have set the meter for a 0 to 500 °F
display, but a wiring problem causes the transmitter
to put out its overrange signal of 25 mA, the meter
will display about "656."
If loop current is correct,
adjust meter range.
If meter range is correct, fix
condition causing too high a
loop current.
“
-1
“
displayed
Valid or invalid loop
current signal causing
meter reading to be
below minimum of
-1999
Figure out what should be displayed based on meter
setup and current flowing in loop.
When wiring to an RTD temperature sensor is
accidentally shorted it causes the Temptran to
produce a current between 3 and 4 mA. For
example, when you have set the meter for a 0 to
500 °F display, it may give a reading like "-25" for a
3 mA current, not a “
-1
.”
If loop current is correct,
adjust meter range.
If meter range is correct, fix
condition causing too low a
loop current.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
