MA-DISP-FP4x & 6x_EN
Page 13 on 18
Rev: 08/02/2012
9.
ERROR CODES AND FAULT FINDING
1.
Under Range. The meter is being asked to display a value which is more
negative than its limit of -199999
2.
Over Range. The meter is being asked to display a value which is higher than
its limit of 999999
These fault codes could be displayed because the signal is too negative, too positive, or because there is a
wiring error, or because the display‟s scaling has been adjusted to give excessive sensitivity, or because there
is a fault in the display.
A.
If you are connecting a 4-20mA signal to the display, please measure the DC millivolt signal
between terminals 2(-) and 3(+) Ideally, you will measure 132mV at 4mA and 660mV at 20mA. If the voltage is
much higher, there may be a problem with the 33 Ohm input shunt resistor.
You can verify this as follows...
Remove the input signal and power connectors to the meter, and measure the resistance between terminals 2
and 3. This should be 33 Ohms. If it is more than this, the resistor has probably been overloaded and burned
by having a voltage connected across it. Please check your field wiring to ensure that no more than 30mA or
1V can be applied to the current input terminals.
B.
If the measurements above were satisfactory, the problem may be caused by a bad
configuration.
If you are happy to do so, it is a simple matter to reset the display‟s scaling to the factory default conditions.
Put the lockout switch off
-
Press all 4 buttons together for around 3 seconds until the display shows “dEFS n”.
-
Ppress the UP button once so the display shows “dEFS Y”.
-
Now press the OK button and the display will be reset to factory defaults.
If still no success, please return the display to us for the attention of our QA Manager, with a report of what you
found, for repair.
