DRT-301M User Manual
Shanghai Fengyilong Electronic Co,. Ltd.
www.china-meters.com
Email:[email protected]
021-60975591/ 60975592
Disclaimer
We have checked the contents of this publication and every effort has been made to ensure that the
descriptions are as accurate as possible.
However, deviations from the description cannot be completely ruled out, so that no liability can be
accepted for any errors contained in the information given. The data in this manual is checked
regularly and the necessary corrections are included in subsequent editions. We are grateful for any
improvements that you suggest.
Subject to technical modifications without notice.
Copyright
Copyright Forlong July 2009 All rights Reserved.
It is prohibited to pass on or copy this document or to use or disclose its contents without our express
permission. Any duplication is a violation of the law and subject to criminal and civil penalties. All
rights reserved, particularly in the event of a patent award or utility model registration.
1.2 Foreword
Thank you for purchasing the Forlong DRT301M DIN rail three phase power quality meter with
multi-tariff function. Output is LCD displayed and the data can be transported by isolated RS485 . The
meter is provided with a non-volatile memory system that ensures that the readings are not lost or
altered when power off.
The forlong DRT301M power quality meter is the most advanced type electronic meter available at the
market. With the Forlong product range we have introduced a large scale of energy meters on the
market suitable for 110V AC to 400V AC (50 or 60Hz). Besides the normal energy meters we also
developed our own pre-paid meters with chip card, chip card re-loaders and a complete PC
management control system. For more information on other product please contact our sales
department at
Although we produce the Forlong DRT301M meter according to IEC 62053-21, EN50160 and our
quality inspection is very accurate there might always be a possibility that your product shows a fault
or failure for which we do apologize. Under normal conditions your product should give you years of
benefit and pleasure. In case there is a problem with the energy meter you should contact your dealer
immediately. All energy meters are sealed with a special seal. Once this seal is broken there is no
possibility to claim for warranty. Therefore NEVER open an meter or break the seal of the meter. The
warranty time is 12 months, after installation, and only valid for construction faults.
1.3 Performance criteria:
Operating humidity ≤ 75%
Storage humidity ≤ 95%
Operating temperature -10°C - +50°C
Storage temperature -30°C - +70°C
