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mvip@mitech-ndt.com
6 Fault and Troubleshooting
Fault description
Possible Causes
Troubleshooting
The main unit can’t start up
Low battery voltage
Replace the batteries
Reversal of the battery installation
Pay attention to the battery
polarity
The device is too cold
Go to a room with higher
temperatures
Automatically
shut
off
shortly after startup
Low battery voltage
Replace the batteries
No impact
Impact body is not inserted or
incorrectly inserted in the impact unit
Insert the impact body correctly
Impact body is not released or
cannot be armed
Use new impact body;
Have the impact device checked
or replace the impact device.
No testing value
Poor cable contact or cable broken
Replace the cable for the impact
device
The impact device can’t be
identified correctly
Broken of the impact device cable
Replace the cable.
Or disable the auto-identifying
option.
The impact direction can’t
be detected correctly
No proper base calibration
Calibrate the instrument using
the base calibration function
Erroneous measured values No proper base calibration
Calibrate the instrument using
the
base
calibration
and
multi-point calibration functions
The tip ball of the impact device is
badly worn
Replace the tip ball
The test sample is not properly
supported
Support the test sample properly
Measured values on test
block are continuously too
low
Impact device is dirty;
Impact body is damaged
Replace impact body
Measured values on test
block are continuously too
high
Impact body tip flattened
Replace impact body
Test block is worn
Replace test block
Poor repeatability of the test
value
The tip ball of the impact device is
badly worn
Replace the tip ball
The test sample is not properly
supported
Support the test sample properly
The surface condition of the
workpiece is poor
Carefully prepare the testing
point and sample for the impact
The keypad can’t function
properly
Fault of the keypad circuit
Check the connection of the
keypad to the main board. Or
replace the keypad.
The
tester
can’t
communicate via USB
The PC software or the USB driver
is not installed correctly
Reinstall the PC software and the
USB driver.
The main unit is not on
Turn
on
the
unit
before
communicating
7 Maintenance, storage and care
7.1 Performance check (before each use)
The performance check verifies the mechanical and electronic functions of the impact device and the
main unit. It is accomplished by measuring the hardness value HL of the test block applicable to the
particular type of impact device.
7.1.1 The main unit
Check the operability of the display.
