The Yokogawa CL250 digital clamp meter is an average-sensing,
manual- and auto-ranging multimeter for measuring current,
voltage, and resistance in electrical testing applications. It
has a clamp that measures AC current to 2,000 amp and DC current
to 2,000 amp. The clamp has two jaws that can close around an
electrical conductor up to 55mm in diameter to measure current
without touching or interrupting the circuit. A set of test leads
is included for measuring AC voltage to 750, DC voltage to
1,000V, and resistance to 4,000 ohms. To aid documentation of
readings and capture readings in tight spaces, the data hold
function keeps the most recent reading on the display after
disconnecting from the circuit. An audible continuity sensor
confirms that the circuit conducts electricity. The meter has a
3,999-count LCD that shows readings numerically. It comes with an
output plug to connect to a device for DC
output. The unit operates on two AA batteries, and turns off
automatically after 10 minutes of non-use to conserve battery
life. It has a low-battery indicator that signals when the
battery needs to be replaced. Clamp meters are typically used by
electrical engineers to measure properties of electrical current
without physically touching or disconnecting the conductor.
This average-sensing, or average-responding, meter provides
accurate readings when measuring linear loads, such as standard
induction motors and incandescent lights, where the current or
voltage has a sinusoidal waveform. It has two ranging modes:
manual, which allows the user to select the operating range, and
auto, which automatically selects the appropriate operating
range. Accuracy and resolution specifications ( # ) vary
according to the range being measured. It meets International
Electrotechnical Commission (IEC) safety standards EN61010-1,
EN61010-2-031, and EN61010-2-032, and it is rated for CAT III
installations to 600V, which covers items used with enclosed
building circuit installations, such as service panel parts,
branch circuits, and fixed installations that are connected
directly to a building's AC power supply, and for CAT II to
1,000V, which covers energy-consuming equipment connected to a
fixed installation, including household, office, and laboratory
appliances. The unit comes with a battery, a test lead set, an
output plug, a carrying case, and instructions.
Specifications
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Maximum AC input2,000 ampMaximum DC input2,000 ampMaximum AC
voltage input750VMaximum DC voltage input1,000VMaximum resistance
detected4000ΩInstallation ratingCAT III, 600V; CAT II,
1000VStandards metIEC safety standards EN61010-1, EN61010-2-031,
and EN61010-2-032Power supply(2) AA
batteriesWeight540gDimensions250 x 105 x 49mm (H x W x D)
H is height, the vertical distance from the lowest to highest
point; W is width, the horizontal distance from left to right; D
is depth, the horizontal distance from front to back.
Clamp meters, also called clamp-on meters, measure electrical
current without cutting through wires, or touching or
interrupting the electrical circuit. Available in handheld or
benchtop models, clamp meters diagnose problems in electrical
equipment, wiring, and power supplies. A current clamp has two
jaws that fit around a conductor to take measurements. All clamp
meters test for current. Some come with test leads and inputs for
measuring voltage, capacitance, and resistance. They display
information either in analog or digital form. Factors that
influence meter choice include the electrical properties to be
measured, the anticipated range of results, and the desired level
of protection against transient voltages. Safety ratings are
based on International Electrotechnical Commission (IEC)
standards for low-voltage test equipment. IEC 61010 delineates
four overvoltage installation categories. In general, a meter
with a category IV rating will provide more protection against
transient voltages than a meter with a lower category rating.
Yokogawa manufactures test and measurement equipment, navigation
systems, and industrial control systems. The company, founded in
1915 in Tokyo, Japan, has U.S. headquarters in Sugar Land, TX. It
meets International Organization for Standardization (ISO)
standard 9001:2008.
What's in the Box?
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* Yokogawa CL250 clamp meter
* Test lead set
* Output cable
* (2) AA batteries
* Case
* Instructions
- Digital clamp meter measures AC and DC current to 2,000 amp, AC voltage to 750V, DC voltage to 1,000V, and resistance to 4,000 ohms.
- Average-sensing meter provides accurate readings when measuring linear loads, where the current or voltage has a sinusoidal waveform.
- Jaw opening measures current in a conductor up to 55mm without touching or interrupting the circuit.
- Data hold function keeps the most recent reading on the display after disconnecting from the circuit.
- Meets IEC safety standards EN61010-1, EN61010-2-031, and EN61010-2-032, and is rated for CAT III installations to 600V and CAT II to 1000V.