Hioki 3453 Digital Megohm HiTester, 400 Ohms Resistance, 600V AC Voltage

The Hioki 3453 digital insulation tester is an auto-ranging megohmmeter with four test voltages—125, 250, 500, and 1,000V—for measuring insulation resistance to 4,000MΩ to indicate the condition of windings or cables in motors, switchgears, electrical installations, and other insulated equipment, and it also measures low-resistance to 200Ω and AC voltage to 600V, lighting a warning indicator when voltage greater than 40V is detected. The comparator function allows a reference value to be set, identifies subsequent readings as high or low in comparison, and triggers a buzzer when readings fall below the reference value. The memory function stores up to 20 readings. To aid documentation of readings, the data hold function keeps the most recent reading on the display. When measurement is complete, the discharge function clears residual voltage from the circuit under test. A continuity buzzer confirms that a circuit conducts electricity. The meter has a 4,000-count LCD with a backlight for visibility in low light that automatically turns off after eight seconds. The LCD shows the reading numerically and in a 42-segment bar graph. This auto-ranging meter automatically selects the appropriate operating range for measurements. It is rated for category (CAT) III installations to 600V, 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 automatically turns off after 10 minutes of non-use to conserve battery life and has a low-battery indicator that signals when the batteries need to be replaced. It comes with a test probe, a detachable cover to protect the display, four 1.5V AA batteries, and instructions. It is available with or without a carrying case. Megohmmeters are commonly used for electrical maintenance and testing in industries such as HVAC, transportation, manufacturing, mining, and utilities, among others.

Specifications

*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

Megohmmeters, also called insulation testers, are electrical test meters that measure resistance to the flow of current in an electrical component or circuit and check the continuity of an electrical circuit to detect electrical problems such as degraded insulation and improper circuit connections in equipment, wiring, and power supplies. Resistance is an indicator of the overall condition of the device being tested. Megohmmeters have an internal power supply, such as a battery or a capacitor, which supplies a test voltage to a circuit or component that is turned off. Test leads are connected in a series to the tester and the circuit or device being tested. The meter calculates the difference in voltage between the leads and measures the resistance. Most megohmmeters have two terminals for test lead attachment. The two-terminal, or two-wire, measurement method includes the resistance of the circuit or device being tested and the resistance of the test leads, and generally provides sufficient accuracy for measuring large values of resistance in insulation testing applications.

Hioki manufactures memory recorders, automatic test equipment, and electronic testing and measurement instruments. The company, founded in 1935, is headquartered in Japan and has a U.S. office in Cranbury, NJ.

What's in the Box?

• Hioki 3453 digital megohmmeter
• Test probe
• Display cover
• (4) 1.5V AA batteries
• Instructions