AC/DC AUTO-ZERO CURRENT SENSOR
CT7742
Accurate, Long-term Recording and Easy Output Settings
Hioki clamp on meters are best-in-class measuring devices incorporating Hioki’s expertise in current sensing technology. The CT7742 is a 2000 A AC/DC Current Sensor that pairs with the detachable Display Unit CM7290 for convenient field testing, while delivering an extended temperature range and auto-zero adjustment to minimize drift due to wide temperature changes that occur during long-term testing. Further extend the functionality of this system by connecting the Display Unit with a Hioki memory recorder or logger. CAT IV 600 V Key Features • Accurately measure and record even when the temperature changes • Ideal for site inspections by using detachable Display Unit • Four output formats to output data to loggers or other devices (via Display Unit): WAVE, RMS, PEAK, Hz
CT7742 | 2000 A AC/DC, φ55 mm (2.17 in) |
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Note: CT7700 series cannot be used alone. Use with the Display Unit CM7290, CM7291 to connect with Data Loggers and Memory HiCorders. When used in combination with CM7290 or CM7291, the frequency band of current display and waveform output becomes narrow.
Must be paired with the Display Unit CM7290 or CM7291 to operate as a standalone unit. Add an output cord to deliver signals to a data logger or Memory HiCorder for the following types of output: • A DC or AC (up to 5 kHz/10 kHz) current waveform as-is (using WAVE mode for waveform output) • An analog signal generated by converting the input waveform to a series of RMS values (using RMS mode for RMS output) • An analog signal generated by detecting the current waveform’s peak value (using PEAK mode for peak output • An analog waveform generated by detecting the frequency of the current waveform (using FREQ mode for frequency output)
Because temperature variations cause the zero-point to shift when using a conventional DC current sensor to measure DC current, it is necessary to perform zero-adjustment periodically when recording data over an extended period of time with such a sensor. This shortcoming is caused by the effects of the Hall element that conventional DC current sensors use to to detect current. Hioki’s new auto-zero current sensors incorporate a new switching-based offset cancellation circuit developed to address this problem. The new design minimizes zero-point shift, making it possible to record DC current values over an extended period of time without the need for periodic zero-adjustment.
Rated measurement current | 2000 A AC/DC |
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Max. measurement current | 2000 A (requires derating at frequency) |
Max. allowable peak input | 2840 A peak |
Bandwidth | DC to 5 kHz (-3dB) (When used in combination with CM7290 or CM7291: DC 3 Hz to 1 kHz) |
Typical phase accuracy | ±2.3 deg. (DC < f ≤ 66 Hz) |
Output rate | 0.1 mV/A |
Max. rated voltage to earth | AC/DC 600 V (CAT IV) AC/DC 1000 V (CAT III) |
Core diameter | φ 55 mm (2.17 in) or less |
Output connectors | HIOKI PL 14 |
Operating temperature range | -25 °C to 65 °C (-13 °F to 149 °F) |
Dimensions and mass | 64 mm (2.52 in)W × 195 mm (7.68 in)H × 34 mm (1.34 in)D, 510 g (18.0 oz), Cable length 2.5 m (8.20 ft) |
Accessories | None |
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Catalog: AC/DC CURRENT SENSOR CT7000 Series, DISPLAY UNIT CM7290, CM7291 | Download PDF [2MB] |
English |
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Instruction Manual |
English |
Ver.01 | |
Instruction Manual |
Simplified Chinese |
Ver.00 | |
Operating Precautions |
Japanese English Simplified Chinese Korean Traditional Chinese Spanish German French Italian |
Ver.02 |
If you can not download, log into your myHioki account to access more technical documents and information where available.
AC/DC AUTO-ZERO CURRENT SENSOR CT7742 [108KB] |
Ver.00 |
Combination accuracy table of CM 7290, CM 7291 and corresponding current sensor. [2MB] |
AC/DC AUTO-ZERO CURRENT SENSOR CT7731,CT7736,CT7742 [99KB] |
Ver.01 |
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DISPLAY UNIT CM7290
• Pair with CT7000 series • DCA, ACA, (DC+AC)A, frequency • WAVE, RMS, PEAK, Hz output
EXTENSION CABLE L0220-01
2 m (6.56 ft) length
EXTENSION CABLE L0220-02
5 m (16.41 ft) length
EXTENSION CABLE L0220-03
10 m (32.81 ft) length
EXTENSION CABLE L0220-04
20 m (65.62 ft) length
EXTENSION CABLE L0220-05
30 m (98.43 ft) length
EXTENSION CABLE L0220-06
50 m (164.06 ft) length
EXTENSION CABLE L0220-07
100 m (328.11 ft) length
DISPLAY UNIT CM7291 (Bluetooth®)
• Bluetooth(R) wireless technology • Pair with CT7000 series • DCA, ACA, (DC+AC)A, frequency • WAVE, RMS, PEAK, Hz output
CARRYING CASE C0220
For storing sensor ×1, CM7290 ×1, AC adapter ×1, and output cord
CARRYING CASE C0221
For storing sensor ×3, CM7290 ×1, AC adapter ×1, output cord, and 30 m extension cable
OUTPUT CORD L9094
φ 3.5 mm (0.14 in) dia. mini plug to banana, 1.5 m (4.92 ft) length
OUTPUT CORD L9095
Connect to BNC terminal, 1.5 m (4.92 ft) length
OUTPUT CORD L9096
Connect to terminal block, 1.5 m (4.92 ft) length
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