KERN KFB-TM Service Manual

- 35 - KFB-TM/KFN-TM-SH-e-1410
Determine whether the problem is in the indicator or the platform
 Remove power from the system, and disconnect the indicator from the platform
 Connect the indicator to a load cell simulator
 Reapply power and test the indicator
 If problem goes away, its source is probably in the platform. Check the wiring,
connecter, load cells and mechanical components of the platform.
If problem persists, its source is probably in the indicator. Check the indicator
voltages, connecters, cables and function programs.
10.3 Check the Load cell
 Remove power from the system, and disconnect the indicator from the platform
 Remove the load connecter from platform terminal.
 Check the moisture, or foreign material inside.
 Make sure all leads are connected and correctly. See the details of connections in the
Installation section.
 Check load cell for proper input and output resistances
Measuring Points
Resistance
+ Exc to –Exc (Input)
Minimum 350 ohms
+Sig to –Sig (Output)
347 ~ 353 ohms
10.4 Check Indicator Voltages
If the problem is in the Indicator, use a multimeter to check the following voltages
AC Power
Check the AC power socket out put voltage.
 Voltage must be a -20% and +10% of the normal AC voltage.
Adaptor Voltage
Check the adaptor output cable connecter voltage
 Voltage must be minimum 9VDC and maximum 15VDC

KERN KFB-TM Specifications

General

Brand	KERN
Model	KFB-TM
Category	Monitor
Language	English