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MICROTEST 8740N-256P 256-Pin 2-Wire Cable & Harness Tester, 1 kV DC

£1593.00 (£1911.60 inc. VAT)

Available on back-order

Availability: Stock models delivered next working day (UK only) for orders placed before 16:30 (Mon - Fri)

SKU: 8740N-256P Categories: , Brand:

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8740N-256PNewImage of Microtest 8740 256p front telonicuk2-wire2561 mΩ–52 ΩN/A50–1,000 V / 0.1–1,000 µA0.1 MΩ–1 GΩOn Backorder£1,593.00
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8740NA-256PNewImage of Microtest 8740 256p front telonicuk2-wire2561 mΩ–52 Ω100–700 V / 0.01–5 mA50–1,000 V / 0.1–1,000 µA0.1 MΩ–1 GΩOn Backorder£1,961.00
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Description


MICROTEST 8740N-256P 256-Pin 2-Wire Cable & Harness Tester, 1 kV DC

The MICROTEST 8740N-256P is a 256-pin 2-wire cable and wire harness tester with continuity measurement from 100 mΩ to 52 Ω. Its two-wire measurement method supports general wiring and connection checks on production cable assemblies. It provides DC Hipot testing up to 1 kV, insulation resistance covering 0.1 MΩ–1 GΩ, open/short testing, intermittent-fault detection and resistor, capacitor and diode checks. The intermediate pin count provides additional connection capacity within the smaller enclosure. Storage for up to 500 test files and RS-232, USB Host, printer and remote interfaces support repeat production work.

Key Features
  • 2-wire measurement with 128, 256, 512 test-point configurations.
  • Continuity resistance from 100 mΩ to 52 Ω, with a 35 mA measurement current.
  • Open/short, intermittent continuity, intermittent open/short, single-side testing and terminal judgement.
  • N: DC Hipot up to 1 kV; NA: up to 700 V AC and 1 kV DC; FA: up to 1 kV AC and 1.5 kV DC.
  • Insulation resistance covering 0.1 MΩ–1 GΩ.
  • Component checks: resistance 100 mΩ–2 MΩ, capacitance 10 pF–3 µF and diode voltage 0.1–6.8 V.
  • Automatic circuit learning for connection-pattern inspection.
  • Up to 500 stored test files, programmable continuous testing, pin search and self-diagnosis.
  • RS-232, USB Host, Print and Remote interfaces; optional PC Link and production accessories.
Applications
  • Production inspection of cable and wire harness assemblies with up to 512 test points.
  • General continuity and connection checks using two-wire fixtures.
  • Electrical inspection of automotive and consumer-electronics harnesses, connectors and flexible flat cables.
  • Detecting intermittent connections during handling or movement of the assembly.
  • Checking resistors, capacitors and diodes incorporated into cable assemblies.
  • Dielectric-strength and insulation testing within the selected model’s ratings.

Product Images

Choose 128, 256 or 512 test points for cable and connector assemblies. The 8740 series combines two-wire continuity measurement with connection, insulation and component checks.

Cable testing with up to 512 test points

The two-wire method suits assemblies that do not require milliohm-level four-wire measurement. Continuity resistance covers 100 mΩ to 52 Ω.

Two-wire fixtures for general harness testing

Combine continuity, component and connection tests with the selected model’s Hipot functions. Intermittent modes help investigate connections that fail briefly when a cable is moved.

Configure the checks your cable needs

Use open/short testing to check the learned connection pattern and detect missing or unintended connections. The series also supports single-side testing and pin search.

Check wiring for opens and shorts

Test dielectric strength and insulation resistance in one instrument. FA models provide up to 1 kV AC and 1.5 kV DC; NA models provide 700 V AC and 1 kV DC; N models provide DC testing up to 1 kV.

Add Hipot, insulation and arc checks

Check components built into the cable assembly alongside its wiring. Component ranges include 100 mΩ to 2 MΩ resistance, 10 pF to 3 µF capacitance and 0.1–6.8 V diode testing.

Verify resistors, capacitors and diodes

×

Choose 128, 256 or 512 test points for cable and connector assemblies. The 8740 series combines two-wire continuity measurement with connection, insulation and component checks.
The two-wire method suits assemblies that do not require milliohm-level four-wire measurement. Continuity resistance covers 100 mΩ to 52 Ω.
Combine continuity, component and connection tests with the selected model’s Hipot functions. Intermittent modes help investigate connections that fail briefly when a cable is moved.
Use open/short testing to check the learned connection pattern and detect missing or unintended connections. The series also supports single-side testing and pin search.
Test dielectric strength and insulation resistance in one instrument. FA models provide up to 1 kV AC and 1.5 kV DC; NA models provide 700 V AC and 1 kV DC; N models provide DC testing up to 1 kV.
Check components built into the cable assembly alongside its wiring. Component ranges include 100 mΩ to 2 MΩ resistance, 10 pF to 3 µF capacitance and 0.1–6.8 V diode testing.

Product Videos

YouTube Video
MICROTEST | 8740 Cable Tester

Documentation


Specification 8740N 8740NA 8740FA
Measurement method 2-wire 2-wire 2-wire
Available test points 128 / 256 / 512 128 / 256 / 512 128 / 256 / 512
AC Hipot voltage Not available 100–700 V 100–1,000 V
DC Hipot voltage 50–1,000 V 50–1,000 V 50–1,500 V
AC Hipot leakage current Not available 0.01–5 mA 0.01–5 mA
AC arc detection settings Not available 1–8 1–8
DC Hipot leakage current 0.1–1,000 µA 0.1–1,000 µA 0.1–1,000 µA
DC arc detection settings 1–8 1–8 1–8
Insulation resistance 0.1 MΩ–1 GΩ 0.1 MΩ–1 GΩ 0.1 MΩ–1 GΩ
Hipot output accuracy ±5% ±5% ±5%
Hipot measurement basic accuracy ±5% ±5% ±5%
Rated output (manufacturer description) 5 V DC 5 V DC 5 V DC
Hipot measurement time 0.01–60 s 0.01–60 s 0.01–60 s
Maximum allowable DUT capacitance 5 µF 5 µF 5 µF
Continuity resistance 100 mΩ–52 Ω 100 mΩ–52 Ω 100 mΩ–52 Ω
Continuity test current 35 mA 35 mA 35 mA
Intermittent continuity 20 Ω–2 kΩ 20 Ω–2 kΩ 20 Ω–2 kΩ
O/S, intermittent O/S and quick intermittent open circuit 1–100 kΩ 1–100 kΩ 1–100 kΩ
Single-side testing and O/S terminal judgement Supported Supported Supported
Component resistance 100 mΩ–2 MΩ 100 mΩ–2 MΩ 100 mΩ–2 MΩ
Resistance signal 2.4 V fixed 2.4 V fixed 2.4 V fixed
Component capacitance 10 pF–3 µF 10 pF–3 µF 10 pF–3 µF
Capacitance signal 1.2 V fixed 1.2 V fixed 1.2 V fixed
Capacitance frequency AUTO AUTO AUTO
Diode voltage 0.1–6.8 V 0.1–6.8 V 0.1–6.8 V
Test files Up to 500 Up to 500 Up to 500
Display 320 × 240 dot-matrix 320 × 240 dot-matrix 320 × 240 dot-matrix
Advanced functions Programmable continuous testing / pin search / self-diagnosis Programmable continuous testing / pin search / self-diagnosis Programmable continuous testing / pin search / self-diagnosis
Scan modes Automatic / manual / external trigger Automatic / manual / external trigger Automatic / manual / external trigger
Controls System / Rapid / Edit / Function System / Rapid / Edit / Function System / Rapid / Edit / Function
Indication Pass/Fail and HV indicators / screen / sound Pass/Fail and HV indicators / screen / sound Pass/Fail and HV indicators / screen / sound
Operation Manual / automatic / remote Manual / automatic / remote Manual / automatic / remote
Interfaces RS-232 / USB Host / Print / Remote RS-232 / USB Host / Print / Remote RS-232 / USB Host / Print / Remote
PC Link Supported; software is an optional ordering item Supported; software is an optional ordering item Supported; software is an optional ordering item
Supply 115 / 230 V AC ±10%, 50 / 60 Hz 115 / 230 V AC ±10%, 50 / 60 Hz 115 / 230 V AC ±10%, 50 / 60 Hz
Operating environment 15–35°C; ≤70% RH 15–35°C; ≤70% RH 15–35°C; ≤70% RH
Dimensions W × H × D 128P: 435 × 145 × 406 mm; 256P: 435 × 145 × 406 mm; 512P: 435 × 190 × 406 mm 128P: 435 × 145 × 406 mm; 256P: 435 × 145 × 406 mm; 512P: 435 × 190 × 406 mm 128P: 435 × 145 × 406 mm; 256P: 435 × 145 × 406 mm; 512P: 435 × 190 × 406 mm
Weight 128P: 8.44 kg; 256P: 9.3 kg; 512P: 14 kg 128P: 8.44 kg; 256P: 9.3 kg; 512P: 14 kg 128P: 8.44 kg; 256P: 9.3 kg; 512P: 14 kg
Power consumption 128P: 70 VA; 256P: 100 VA; 512P: 150 VA 128P: 70 VA; 256P: 100 VA; 512P: 150 VA 128P: 70 VA; 256P: 100 VA; 512P: 150 VA
Voltage qualification Manufacturer note: at a 5 MΩ setting or below 5 µA, maximum test voltage is 650 V; AC tolerance setting range 0.01–5 mA. Consult the manual for the test conditions. Manufacturer note: at a 5 MΩ setting or below 5 µA, maximum test voltage is 650 V; AC tolerance setting range 0.01–5 mA. Consult the manual for the test conditions. Manufacturer note: at a 5 MΩ setting or below 5 µA, maximum test voltage is 650 V; AC tolerance setting range 0.01–5 mA. Consult the manual for the test conditions.
Additional test qualifications Correct/zero before AC Hipot measurements below 0.1 mA; follow the manual for insulation measurements. Correct/zero before AC Hipot measurements below 0.1 mA; follow the manual for insulation measurements. Correct/zero before AC Hipot measurements below 0.1 mA; follow the manual for insulation measurements.

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