LY112 Single-Phase Electric Energy Meter---On-Site Calibration Instrument
Introduction
This instrument is a single phase Portable Working Standard of class 0.1 %, and is used to test single phase meters installations on site.
The unit can be used with various types of clamp-on CTs and current sensors. Therefore, it is possible to easily and accurately test both CT and direct connected meters.
The unit can be powered either from the built-in rechargeable battery or the measuring circuit or from an auxiliary single phase supply.
- Simultaneously measure full wave, fundamental wave and harmonic. And display all parameters of the full wave and fundamental wave in real time, as well as various parameters of the total harmonic.
- Error measurement modes include 7 kinds of full wave active power and fundamental wave active power. It can verify the accuracy of active energy of full wave meters, fundamental wave meters, and harmonic meters, and the accuracy of reactive energy of full wave meters and fundamental wave meters. It can also check the accuracy of the apparent energy meter.
- Simultaneously analyze the content and measurement value of U, I, P, Q, VA of the 2nd – 51st harmonic, showing the total harmonics PH+, PH- and as a percentage of the fundamental wave to determine the effect of the positive and negative active power of the harmonics on the metering.
- The dial test (energy accumulation test) can test both the energy meter with pulse output (LED/Disc mark/Terminal) and the energy meter without energy pulse output.
- Display voltage, current vector diagram.
- Display voltage and current waveforms.
- With temperature and humidity measurement function (optional).
Top view
RS232 port
USB port
For connecting U stick
Battery charger port
DC12V, Charging the rechargeable battery built into the instrument
Battery switch
0 – Power off
I –Power on
Current input port
Current direct input port, maximum <12A
Voltage input port
Maximum input voltage <600V
Phantom load port
Provide the maximum load current of 5A for the meter under test.
Pulse input/output port
Connect the scanning head or pulse input cable to collect or capture the pulse of the meter under test
Connect the pulse output cable to supply the output pulse of the instrument to other equipment.
Clamp-on CT port 1
Ports for connecting 100A, 500A and 1000A clamp-on CTs
Clamp-on CT port 2
Ports for connecting 5A clamp-on CT
Auxiliary supply socket
Operating range for supply by auxiliary voltage: 80V to 264V
Main switch
I –EXT. POWER, External AC power supply
II –VOLTEGE INPUT, Internal terminal power supply
0 – Power off
