Low Voltage
Harness Tester

Test complex assemblies with thousands of points. The system supports guided assembly with on-screen connector images, guidance LEDs on the assembly board, and immediate graphical and audible feedback to catch errors as they occur.

The new 8100 tester will be replacing the CR Tester.

Learn About the 8100

CR Low Voltage Tester


Test Points

256 points; expandable to 32,000 points in 256-point increments. (Max distance from base unit: 200 ft.)

Low Voltage Test

2 Wire
  • Voltage: 10 V max
  • Current: 1.6 μA to 6 mA
  • Wire Resistance: 0.1 Ω to 100 Ω ±3% ±0.1 Ω
4 Wire
  • Voltage: 10 V max
  • Current: 1.6 μA to 6 mA
  • Wire Resistance: 0.005 Ω to 80 Ω ±2% ±0.005 Ω

Component Tests

  • Diodes: 0 to 7 V
  • Resistors: 1 Ω to 100 kΩ ±3% ±0.1 Ω, 100 kΩ to 1 MΩ ±5%
  • Capacitors: 100 pF to 1000 μF ±10%

Max Points Per Net


Digital Input/Output

Optional with external PLC

Test Point Interface

64 point (2 row x 32 pins) 0.1” male box header

PC Requirements

  • Test Station: 2.0 GHz min. processor speed, Windows 10®, 15 GB hard drive space, 4 GB RAM, 256 MB min. video memory, 1024 x 768 min display resolution, sound (for audible feedback), USB 2.0 or 3.0 port.
  • Optional Network Database Server: As above except no sound or USB ports required. Windows 10®, Windows Server 2012® or Windows Server 2016® OS. A Compatible Cirris tester: ( CH2, CR, Easy-Touch, Easy-Touch Pro, 4200 Series, 1100H+, 1100R+ with PC Control Software)


115 / 230 V 50/60 Hz

Dimensions (width x height x depth)

5.5 x 2.8 x 6.8 in. (13.8 x 7.0 x 17.3 cm)
Note, all dimensions are rounded up from their real measurements.


2.7 lbs (1.3 kg)



CR Datasheet

Version 2021.3.1  |  1.77 MB

Product Options

CR Low Voltage Tester

CR Base Unit (CCRW-BU)

CR Base Unit with 256 test points and one Easy-Wire Software license.

CR Expansion Unit (CCRW-RA)

Each CR Expansion Unit provides 256 additional test points but must be connected to a CR test system that has a CR Base Unit connected to the operating PC.

CR Booster Unit (CCRW-BO)

The Base Unit and each Booster can support up to 7 Expansion Units. One Booster Unit is needed for every 7 Expansion Units.

CR Base Unit with Digital IO (SIO-EW)

Easy-Wire Digitial IO and Windows Messaging Option

Cirris Server (LANL-EW)

Provides a network database for all connector definitions and test programs. Strongly recommended to ensure compatibility between all test stations without importing and exporting. Additionally provides a centralized location for backup and test data access.

Cirris Tester Access API (CTA-EW)

Alternatively control the tester with a third part applications written in LabVIEW, Python, C, C#, C++ and Delphi.

OPC UA Server (OPC-EW)

Transmit tester status and test information in real time to other information systems or equipment.

CR Performance Check Kit (PCHK-CR)

Verify calibration with the performance check kit. The certificate of calibration included with a performance check kit is valid for two years.

Product Documentation & Software

Getting Started

User Manuals

Learn how to set up and operate your CR tester.


CR Getting Started Guide

Version 2022.4.0  |  3.11 MB


CR User Manual

Version 2022.4.0  |  14.04 MB


Easy-Wire® Software

Easy-Wire Software controls the CR tester. If networking, the Cirris Server Software must be the same version as the Easy-Wire Station Software.


Easy-Wire Station

Version 2023.4.4.8025  |  337.46 MB
MD5 Checksum: 04f51953c8a804f8524ff7af3082b457 Cirris...


Migration Guide

A guide for transitioning from the CR tester to the 8100 tester.


CR to 8100 Migration Guide

Version 2023.3.0  |  157.52 KB

Supporting Documentation & Software

Cirris Server

Allows testers running Easy-Wire to be networked together storing test programs and test data in a central network location.


Cirris Server Install

Version 2023.4.4.8025  |  306.82 MB
MD5 Checksum: 09199eae1021bd544c1e9bc7a12d8c6e ...

Software version must be the same version as your Easy-Wire install. Contact your Cirris salesperson to purchase and receive unlock password.


CR Performance Verification


CR Performance Verification Manual

Version 2019.2.0  |  697.45 KB

Additional Documentation & Software

Easy-Wire Scripting

Scripting allows customization of the test process and reports. Scripting is an optional feature. Use Easy-Wire scripting when the tester is being controlled by Easy-Wire.


Easy-Wire Scripting Manual

Version 2017.4.0  |  1.80 MB


Cirris Tester Access API (CTA)

Allows the tester to be controlled by a third party application such as LabVIEW, C++, C#, Python, and Delphi.


Cirris Tester Access (CTA) User Manual

Version 2023.2.0  |  536.15 KB


Format Conversion Utility

This utility allows you to import test data from a spreadsheet or delimited text file.


Format Conversion Utility

Version 2019.1.1  |  608.35 KB



Allow your the tester to recognize an adapter cable and automatically map its test points.


Smart-Lights Quick Start Guide

Version 2021.4.0  |  670.43 KB


Header Strip

Provides a strip interface connector to interface to individual Smart-Light adapters and not waste test points.


Header Strip Transition Board

Version 2014.3.0  |  1.11 MB


Traditional Cable Interface Demos

Training documentation that for traditional cable interface harness boards.


CH2 & CR Demo

Version 2011.1.0  |  7.28 MB


Smart-Light Demos

Training documentation that goes with harness boards that use Smart-Light interface cables.


Smart-Lights Demo

Version 2019.2.0  |  8.56 MB