Flexible AC Current Probe

HHM301

AC Current Probe for Flexible Current Measurement

^AUD397.14 HHM301

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Three Full-Scale Ranges: 0 to 30, 300, and 3000 Aac
Output: 1 mVac/A in 3000A Range; 10 mVac/A in 300A Range; 100 mVac/A in 30A Range
458 mm (18") Long Probe Creates 152 mm (6") Diameter Loop
Measurements Accurate Within 1% of Full-Scale Range
Probe is Safe for CAT III 1000V, CAT IV 600V Use; Converter is Safe for CAT II 1000V, CAT III 600V Use

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Description

The HHM301 allows any clamp meter or multimeter to enclose a thick or hard-to-reach conductor, bundle of conductors, or bus bar while increasing its AC current measurement range to up to 3000 Aac. The product has three components: a flexible probe, a current-tovoltage converter, and a pair of banana plug output leads. When formed into a loop, the probe is called a Rogowski coil which is a helical coil of wire inside a shield that is designed to be placed around a straight conductor, a bundle of conductors, or a copper bus bar that typically carries large currents (>10A).

The voltage induced in a Rogowski coil is proportional to the rate of change (derivative) of current in the straight conductor. In the HHM301, the integrator circuit needed to change the output of the Rogowski coil to a voltage signal proportional to current is located inside the current-to-voltage converter.

The converter allows you to choose the HHM301 full-scale current range and therefore its current-tovoltage conversion factor. The rotary switch on the converter has three positions: 30A, 300A and 3000A. With the switch in the 30A position, the unit converts current to voltage at a ratio of 100 mVac/A and outputs the result to the banana plug output leads. The leads are designed to be plugged into a multimeter or clamp meter operating in AC voltage measurement mode. A simple formula can then be used to convert the meter’s voltage reading back to a current measurement. With the converter switch in the 300A position, the conversion factor change to 10 mVac/A; in the 3000A position, the conversion factor is 1 mVac/A. The three ranges allow you to measure very large currents each with a unique combination of range and resolution.

Specifications
Measurement Ranges: 0 to 30 Aac, 0 to 300 Aac, 0 to 3000 Aac (full-scale)
Conversion Ratios (Output): 1 mVac/A in 3000A range; 10 mVac/A in 300A range; 100 mVac/A in 30A range
Measurement Accuracy: ±1% of full-scale value
Position Error: ±1% @ 1" from conductor; ±2% @ 2"; ±3% @ 3"
Safety Ratings: CAT III 1000V, CAT IV 600V (probe); CAT II 1000V, CAT III 600V (controller)
Probe Length: 458 mm (18"); creates 152 mm (6") diameter loop
Probe Diameter: 8.5 mm (0.33")
Cable Length (Probe to Converter): 1.8 m (6')
Bandwidth (-3dB): 10 Hz to 10 kHz
Input Impedance: 10 kΩ minimum
Operating Temperature: 0 to 50°C (32 to 122°F) @<80% RH
Power Source: 2 “AAA” batteries (included)
Dimensions of Converter: 120 H x 70 W x 26 mm D (4.7 x 2.8 1.0")
Weight (including batteries): 325 g (11.4 oz)

Place Order(Specify Model Number)

Part Number/ Desc.

Qty

Description

HHM301

AUD397.14

Availability: 1 week

Flexible AC current probe

† All amounts shown in AUD
Note: The HHM301 (current probe, converter and non-detachable 90° banana plug output leads) comes fully assembled and includes 2 “AAA” batteries and operator’s manual.
Ordering Example: (1) HHM301 Flexible AC current probe, AUD397.14