DRT-301M User Manual
Shanghai Fengyilong Electronic Co,. Ltd.
www.china-meters.com
Email:[email protected]
021-60975591/ 60975592
DESCRIPTION OF LCD SYMBOLS DISPLAYED
Pulse output
DRT-301M DIN rail power quality meter is equipped with a pulse output which is fully separated from
the inside circuit. That generates pulses in proportion to the measured energy. They are test pulse
output (pins 8 & 9). Usually, the test pulse output is used as testing accuracy or reading purpose in
close quarters.
The test pulse output is a polarity dependant, passive transistor output requiring an external voltage
source for correct operation. For this external voltage source, the voltage (Ui) should be 5-27V DC,
and the maximum input current (Imax) should be 27mA DC. To connect the impulse output, connect
5-27V DC to connector 9 (anode), and the signal wire (S) to connector 8 (cathode). The meter pulses
is indicated on the front panel.
Symbol
Description
kW h
Unit indicator
：
kWh—active energy kW—active power
k var
Unit indicator
：
kvar—reactive power
kv
A
Unit indicator
：
KVA
—
apparent energy
Displayed permit programming
Battery status:3.6V When the battery voltage is low, flashes show
LCD alarm indicator
Communication symbols
（
When communicating,it flashed
），
For 485 and
infrared communication interface in communication instructions
MD
Max demand
Tariff: T1,T2,T3,T4
this month
last 1 month
last 2 month
