Buy Amprobe 37XR-A True RMS Digital Multimeter with Component Logic Test
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The Amprobe 37XR-A digital multimeter is a true RMS (root mean square), auto- or manual-ranging meter for measuring current, voltage, resistance, capacitance, frequency, inductance, duty cycles, logic states, and power in decibels relative to miliwatts (dBm) in electrical testing and electronics repair applications. The meter comes with a set of detachable test leads with two alligator clips for measuring measure alternating current (AC) and direct current (DC) to 10 amp, AC voltage to 750 volts (V), DC voltage to 1,000V, resistance to 40 megaohms, capacitance to 400 microfarads, frequency to 10 megahertz (MHz), inductance to 40 henrys (H), duty cycles to 90%, and power to 50 decibels relative to miliwatts (dBm). The logic test reports the logic state of transistor-to-transistor (TTL) or complementary metal-oxide-semiconductor (CMOS) digital circuits in electronics. The maximum or minimum reading mode displays the highest or lowest reading in a session to track a sudden increase or decrease in readings, and the average function displays the average of the recorded maximum or minimum values. The peak + or - function records peak positive or negative values for AC current and AC voltage. A liquid crystal display (LCD) shows readings both in digits and on a 41-segment bar graph. The display is backlit for visibility in low light. The relative zero mode stores a reading in memory to use as a zero point for subsequent readings, allowing for quick comparison of readings. An audible continuity sensor confirms that the circuit conducts electricity, and a diode test detects whether the circuit's diodes work properly. The hold function keeps a reading on the display, even after the meter is disconnected. An auto power-off mode turns off the unit after 30 minutes of non-use to conserve battery life, and a low-battery indicator signals when the meter's batteries need to be replaced.
This true RMS (root mean square) sensing 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, or non-linear loads, such as electronic devices or motors, where the current or voltage has a sinusoidal non-sinusoidal waveform. Two ranging modes (auto or manual) offer a range of operator control when taking readings. When turned on, the meter is in auto-ranging mode and automatically selects the correct operating range for the property being measured. It can be switched to manual-ranging mode, which allows the operator to choose the appropriate operating range. The meter has a 10,000-count resolution, meaning it can display up to 9,999 units (4-3/4 digits) before the operating range needs to be changed. It meets International Electrotechnical Commission (IEC) safety standard 61010 and is certified for category II installations up to 1,000V (which covers large household appliances and devices connected to a fixed power supply, such as refrigerators and air conditioners), and category III installations up 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). The meter comes with a magnetic strap that can be used to hang the meter on metal doors or fixtures.
Specifications
| Maximum alternating current (AC) input | 10 amp |
| Maximum direct current (DC) input | 10 amp |
| Maximum AC voltage input | 750 volts (V) |
| Maximum DC voltage input | 1,000V |
| TTL logic test thresholds | 1 (high): 2.8V, + or - 0.8V; 0 (low): 0.8V, + or - 0.5V |
| CMOS logic test thresholds | 1 (high): 4V, + or - 1V; 0 (low): 2V, + or - 0.5V |
| Maximum resistance detected | 40 megaohms |
| Maximum capacitance detected | 400 microfarads |
| Maximum frequency detected | 10 megahertz (MHz) |
| Maximum inductance detected | 40 henrys (H) |
| Duty cycle measurement range | 0 to 90% |
| Decibels relative to milliwatts (dBm) measurement range | -13 to 50 dBm |
| Power supply | 9V NEDA 1604, JIS 006P, or IEC 6F22 battery (one, installed) |
| Fuse | 0.5 amp/1,000V fast-blow ceramic fuse (one, installed), 10 amp/1,000V fast-blow ceramic fuse (one, installed) |
| Standards met | European Conformity (CE); International Electrotechnical Commission (IEC) and European Normal (EN) safety standard 61010-1; Canadian Standards Association (CSA); Underwriters Laboratories (UL) |
| Weight | 1.06 lb./482 g |
| Meter dimensions | 7.7 x 3.5 x 2.3 inches /196 × 92 × 60 mm (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.
Multimeters are electrical test meters that measure multiple properties of an electrical circuit, such as current, voltage, resistance, capacitance, and continuity. Available in handheld or benchtop models, multimeters diagnose electrical problems in electrical equipment, wiring, and power supplies. A variety of probes, clamps, and leads can be used to connect the meter to a circuit or device. Multimeters 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 the International Electrotechnical Commission's (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.
Amprobe manufactures electrical testing equipment for commercial, industrial, and home use. The company was founded in 1948 and is headquartered in Everett, WA.
What’s in the Box?
- Amprobe 37XR-A TRMS digital multimeter
- (1) Set test leads
- (2) Alligator clips
- (1) 9V battery (installed)
- (2) 0.5 amp/1,000V fast-blow ceramic fuse (1 installed, 1 spare)
- (1) 10 amp/1,000V fast-blow ceramic fuse (installed)
- Magnetic strap holster
- Instructions
Amprobe 37XR-A True RMS Digital Multimeter with Component Logic Test Feature
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