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Safety Information
Thank you for purchasing the product. Before test, please carefully read the instructions, safety
information and precautions in the user manual, and make sure you are skilled at operating
the product.
Pay special attention to safe use in any case, particularly for measurement of line with
voltage over AC100V.
Use hot stick when measuring line with voltage over 600V.
On-site high-voltage measurement must be performed by authorized trained personnel.
It is forbidden to test conductor or bus bar with voltage over 60KV.
Please pay attention to the labeled words and symbols at the front and rear panels.
Do not place or keep the product in environments with high temperature, high humidity,
dew or direct sunlight for a long time.
Install battery according to correct polarity, remove battery if the product is not used for a
long time.
Disassembly and servicing must be performed by authorized qualified personnel.
It is forbidden to use if any component of the product is found damaged.
If the using of the product presents risk, please stop use and then send the product to
authorized body for maintenance.
The danger symbol "
must perform safe operation according to the instructions.
The extreme danger symbol "
operator must strictly perform safe operation according to the instructions.
It is recommended to perform dielectric test once per year at least (apply AC 220kV/rms
between both ends of fully-extended hot stick).
I. Introduction
The UT255C Large Current Fork Meter is specifically designed and manufactured to
measure high-voltage current. Its innovative U-shaped clamp, which features a breakthrough
in conventional structure, makes on-site measurement effortless.
This versatile device comprises a current fork meter, a wireless receiver, and a high-voltage
hot stick. With a wireless transfer distance of up to 100 meters and a current range of AC
0.00A~9999A, the UT255C can accurately measure the current of high-voltage lines below
60KV when connected to a hot stick. Conversely, for low-voltage lines below 600V, the
hook meter can directly measure the current without the need for a hot stick.
The UT255C is equipped with several useful features, such as data holding and storage.
Additionally, the adjustable connector at the hot stick and U-shaped clamp jaws make it easy
to clamp the measured conductor. Furthermore, it can serve as an alternative to the
High/Low-Voltage Transformer Turns Ratio Tester by measuring the high/low-voltage current
of primary and secondary loops and calculating the transformer turns ratio. The hot stick is
characterized as being lightweight, retractable, moisture-proof, high temperature resistant,
impact-proof, and highly insulated.
The UT255C Large Current Fork Meter is extensively employed in a variety of settings,
including substations, power plants, industrial and mining enterprises, detection stations, and
electrical servicing departments.
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