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Ⅶ
. Appendix
Appendix 1
：
How to use the photoelectric sampler
The photoelectric sampler shows accurate and fast beam focusing at the time of field calibration,
which directly affects the efficiency of field work. Our company has paid close attention to the
development of photoelectric sampler and the quality of relevant parts since PEC-1 field
calibrator was launched. And in order to meet different needs, we provide three different
solutions.
1. Button photoelectric sampler
It is the most commonly used photoelectric sampler so far, and it is fixed on the energy meter
relying on two elastic bands. With automatic tracking and intelligent recognition of the energy
meter’s black belt, it has the advantages, simple structure, small volume and easy to carry, and
has the function of intelligent identification. Its weakness is as follows: the front cover of the
energy meter needs to be convex, so that it can be fixed up. Also, affected by the energy meter’s
installation location and space, it can not be used on the electronic energy meter.
The operation method is as follows:
1) At first, arrange the photoelectric sampler beneath the meter being calibrated, about 10 ~ 30
mm apart from the calibrated meter. Adjust the up and down position, and make the center of light
beam shoot on the disk of the calibrated meter.
2) press the red button, and enable the red indicator light to go on. After the meter disk’s black
mark has turned, the red indicator light goes out, and the work of beam focusing is completed.
3) after the black mark turns, if the red indicator light is still on or there is incorrect pulse output or
the green indicator light is not on, the front and rear distance or up and down location should be
adjusted appropriately; the work of beam focusing is finished after the red indicator light goes out
and the green indicator light is on.
2. Power pulse line
It is specially designed for electronic energy meter field calibration. One end is connected to the
photoelectric instrument socket, and the other end is connected to three clips. The red large clip
is “+5V", the black is "reference ground", and the red small clip refers to “pulse input”. While
calibrating the energy meter with the pulse as output voltage, the "reference ground" and "pulse
input” are only used. In case of passive optical output, a 1K to 4.7K resistor (pull-up effect) needs
to be added between the “+5V" and "pulse input". Any specific applications need to refer to the
electronic energy meter manual, or contact with the energy meter manufacturer.
