The Yokogawa CL220 digital clamp meter is an average-sensing, auto-ranging multimeter for measuring current in electrical testing applications. It has a clamp that measures AC and DC current to 300 amp. The clamp has two jaws that can close around an electrical conductor up to 24mm in diameter to measure current without touching or interrupting the circuit. 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. The meter has a 4,000-count LCD that shows readings numerically. The unit operates on two 1.5V batteries, and turns off automatically after 5 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 is auto-ranging, so it automatically selects the appropriate operating range for the property being measured. Accuracy and resolution specifications vary according to the range being measured. It meets International Electrotechnical Commission (IEC) safety standards 61010-1 and 61010-2-032, and it is rated for CAT III installations to 300V, which covers equipment in fixed installations, such as switches in the fixed installation and some industrial equipment that is permanently connected to the fixed installation. The unit comes with two batteries, carrying case, and instructions.
Specifications
| Maximum AC input | 300 amp |
| Maximum DC input | 300 amp |
| Installation rating | CAT III, 300V |
| Standards met | IEC safety standards 61010 and 61010-2-032 |
| Power supply | (2) 1.5V batteries |
| Weight | 100g |
| Dimensions | 147 x 59 x 25mm (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?
- Yokogawa CL220 clamp meter
- (2) 1.5V batteries
- Case
- Instructions
