User's Manual

Operation: CP1SR Version
CENTRON® OpenWay™ Meter Technical Reference Guide 73
Testing Support Features
Infrared Test LED
The CENTRON Polyphase CP1SR meter is equipped with an Infrared Test Light Emitting
Diode (LED) (
M in the figure below) where each pulse represents a fixed value of watthour
measurement. The LED is located on the top of the meter as the meter is viewed from a
typical installation. The pulse weight represented by the LED pulses is 1.0 watthour per
pulse (Kh=1.0) for a Form 9S meter and 10.0 watthour per pulse (Kh=10.0) for a Form 16S
meter.
Figure 20: Test LED Location
Pulse Detector
An optional pulse detector is available for the CENTRON OpenWay meter. The pulse
detector has an infrared pickup with two visible LEDs. When positioned over the
CENTRON Polyphase light pipe, it will produce a visible flash when an infrared pulse is
received from the metrology. The right LED will flash once for each infrared Wh pulse
while the left LED will flash once for every 10 infrared pulses received. The left LED on the
pulse detector is helpful when heavier loads are present on the system being examined. This
can be used to verify that the metrology is measuring energy when installed and to conduct
timing tests to determine the amount of load on meter.
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