Milliohm Meter – 16502

16502 Milliohm Meter

Key Features

  • Datasheet
  • Basic accuracy : 0.05%
  • Pulsed test current output mode is used to reduce thermal EMFs affection on milliohm measurement
  • DC test current output mode is used to fasten measurement speed for inductive DUT
  • Dry-circuit test current output mode (limited Max. 20mV) is used to measure such contact resistances where the maximum open-circuit voltage must be limited to 50mV
  • Temperature correction (TC function) regardless of material or temperature
  • Useful temperature conversion function for motor/ coil evaluation
  • 4 channels R scan with balance check function for fan motor (combined with A165017 option)
  • 0.001mΩ~1.9999MΩ wide measurement range with 4½ digits resolution
  • Standard RS-232 interface
  • Optional GPIB & Handler interface
  • Bin-sorting function
  • Comparator and pass/fail alarming beeper function
  • Large LCD display (240 x 64 dot-matrix)
  • Friendly user interface


Chroma 16502 Milliohm Meter (a low resistance measurement ohm meter) is useful for measuring very small resistances. This milliohmmeter ohm meter (also referred to as ohmmeter and micro-ohmmeter) is used to achieve accurate low resistance measurement values. On devices such as switches, relays connectors and printed circuit boards, a low resistance ohm meter measurement for milliohmmeter is recommended as these values require precise data. Micro-ohmmeter and milliohmmeters are perfect for measuring low resistance measurement or conductive characteristics of these components.

Its 0.001mΩ~1.9999MΩ wide measurement range and DC, pulsed, and dry-circuit test current driving modes enable the Chroma 16502 to be used in DC resistance measurements for various inductive components (coil, choke, and transformer winding, etc.), cable, metallic contact (connector, relay switch, etc.), and conductive materials.

Using the available A165014 Temperature Compensation Card with the A165015 PT100 Temperature Probe, resistance values measured at ambient temperature can be corrected by applying a thermal coefficient so that the display shows the corresponding resistance values at any other temperature with the temperature correction function. Temperature increase (Δt) is obtained and displayed by converting resistance measurements and ambient temperature with the convenient temperature conversion function. This function is especially useful for verifying motor windings or coils, where the maximum temperature increase needs to be determined when current is applied.

The Pulsed ± function applications includes power chokes, switch/relay contacts, multi-braided twisted wires, metallic foils or other conductive materials, thermo-sensitive materials (fuse, thermistor sensor) etc. The Dry Circuit function applications include switch/relay contact, thermo-sensitive materials (fuse, thermistor sensors) etc. The DC+ function applications include high inductance DUTs, like primary of transformers (multi-turn) measurements with the Measurement Delay Function to avoid test currents that are not effected by high inductance DUTs during the test period.

Standard RS-232 interface, optional GPIB and Handler interfaces, high speed and stable measurement capabilities enable the Chroma 16502 to be used for both component evaluation on the production line and milliohm measurement for bench-top applications.

Model Options



GPIB & Handler Interface

Allows you to remotely control the Milliohmmeter and transfer data via the IEEE-488.2/Handler interface

GPIB & Handler Interface w/ Temp Comp

Allows users to conduct both GPIB & Handler Interface and CT Sensor functions

Temperature Compensation Card

Using a known temperature and resistance value to calculate the unknown resistance. It’s often used on the conversion of lead resistance. *The temperature measurement function must be conducted with TC SENSOR port as the measurement input.

PT100 Temp Probe

It’s a PT100 type of platinum temperature probe. It has a length of 1.5m. The capability of measurement range is between -50℃ to 300℃.

4-Channel R Scanner

Fans and motors are composed of many groups of coils. The coils should be balanced between each group. Otherwise, it may cause abnormal noises. Hence, the R scanner allows the user to connect the lead to test the fan or motor in one time to complete multi coils test requirement.

Test Fixture for SMD Power Choke

Allows you to test the SMD Power Choke component. It also adopts the 4-terminal measure method. The maximum operating current is 1A. The maximum dimension for DUT is 18mm x 15mm and the minimum is 5mm x 5mm and the solder pin ≥ 1mm x 1mm is recommended.

Pin Type Leads (taper)

An alternative test lead option that may be desired based on your application.

Test Lead 2M, single open

An alternative test lead option that may be suitable for automation test application. These leads are “unterminated” so user can attach special connectors or clips or wire to an automatic handler.

Four Terminal 1M Test Cable (standard accessory)

Standard accessory of 16502 with four terminal design which allows user to have a high accuracy test.

Vacuum Generator

For A165018 test fixture for SMD Power Choke

Vacuum Pump

For A165018 Test Fixture for SMD Power Choke

Pin Type Leads (flat)

An alternative test lead option that may be desired based on your application.

Power Cord (standard accessory)

To plug 16502 Milliohmmeter into the wall voltage (AC Mains)

Rack Mounting Kit

Makes it easier for you to install and remove the Milliohmmeter in a rack.

User Manuals

Manuals - 16502 Milliohm Meter

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User Manuals for 16502 Milliohm Meter. Available documents are: Quick Start Guide Hardware User Manual All files in PDF format. ...

Application Notes

16502 Errors In Low Resistance Measurements

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This application note takes a look at variables in measuring low resistance values and the errors that may occur in making those measurements. ...

LCR And EST Product Interfaces

One time registration required in order to download documents. Register or login to continue. 562 KB 320 downloads

Provides a list of product interfaces for LCR and EST instruments. ...

    How To Buy

    Three efficient ways to get pricing and/or more information regarding this instrument:

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    Lead time

    Most of our instruments are inventoried and ready to ship. If we are currently out of stock – and due to demand we can be - lead times are typically 4-8 weeks depending on the instrument’s power rating.
















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