23
CHAPTER 6. SERVICE AND MAINTENANCE
Users’ Protection
To avoid electric shock, do not dismantle the cover of the AC Power Source. When any
abnormal symptom happens on the instrument, please kindly contact Extech Electronics
office or the authorized local distributor for further assistance.
Consistency Of Service
The AC Power Source with the input circuit and all related parts are required to be checked
and calibrated at least once every year. This is to protect user in terms of safety and to ensure
a high accuracy of this AC Power Source all the time.
Users’ Modification
Modification by user on the AC power Source internal circuits and parts are not allowed. The
warranty is void if the warranty seal is broken or the AC Power Source is being opened by
unauthorized person. Extech reserves the right to convert as original circuit and charge the
customer.
