User's Manual

METTLER TOLEDO WILDCAT Scale Technical Manual
(12/00) 4-2
Error Message Description Probable Action
|
- - - -
Overload indication. Weight on scale exceeds calibrated capacity by more than 9d.
Decrease load on scale.
|
- - - -
l Underload indication. Weight on scale is below gross zero by more than 9d. Increase load
on scale.
Voltage Checks
AC Power Test
Using a Multi-meter, check the AC input power. Input power must be within -15% and
+10% of the nominal AC line voltage.
Controller PCB Input Voltage Test
Confirm the AC adapter is outputting a voltage of at least 9 VDC. If the WILDCAT scale
has power and the Controller PCB does not function properly, replace the PCB.
Check Battery Voltage

(Battery-powered units)
If the WILDCAT scale does not respond by pressing the PRINT key for approximately 3
seconds, the battery pack may be completely discharged. Install a new set of six “D”
cells and retest.
RS232 Serial Output Test
Use the following test procedure to determine whether the RS232 serial port is
operational.
• Remove power and disconnect the data cable from the WILDCAT scale.
• Set the volt meter to read 20 volts DC.
• Connect the red lead to pin 3 of the WILDCAT serial port connect the
black lead to pin 5.
• Apply power. The meter should read as follows:
• In Demand mode, the meter should read between -5 and -15 VDC with no
fluctuation.
• To test the Demand output, press the PRINT key on the WILDCAT scale and the
display should fluctuate between -5 volts to +5 volts for the duration of the
transmission, then become stable again. This indicates the terminal has
transmitted data.
• In Continuous mode, the meter should fluctuate between -5 and +5 VDC
continuously. The constant fluctuation on the meter display indicates the
scale/terminal is transmitting information.
Table 4-1