19
6
）
Fingerprint, dust or stain should be cleaned with absorbent cotton
dipped with mixed solution of alcohol and ether.
7
）
In case of malfunction, do not dismantle it by yourself. Please
contact the local sales agent or the manufacturer for help.
8
）
Provided there is no display on the display window after start-up,
please check the polarity of the battery to see if it is well placed and
electri
fi
d.
Caution: No servicing and maintenance can be performed while the
product is in use.
Warning: No modification of this equipment is allowed.
Warning: Remove the battery if the product is not likely to be used
for some time.
Statement: Manufacturer will provide circuit diagrams, component
part lists, descriptions, calibration instructions to assist to Service
Personnel in parts repair.
8. Troubleshooting
In the event of device trouble, please check the device as per below
chart to obtain guidance. If the trouble is not shot, please contact
with Chongqing Yeasn Science & Technology Co., Ltd. Maintenance
Department or the authorized dealer.
Trouble Reasons Solutions
No data displayed in
the display window
Wrong installation of battery
Install the battery correctly
Insufficient battery capacity
Replace the battery