Milliohm Meter with Data Hold (Battery Identity Test)

This Milliohm with Data hold battery tester analyzes the degradation of the battery by testing the internal resistance and voltage ranging from 0.1 mΩ to 200 Ω, 0 – 50 V DC voltage.



GAOTek Milliohm with Data Hold (Battery Identity test) test is used to judge the degradation of the battery by testing the internal resistance and voltage of the battery. Test range from 0.1 mΩ to 200 Ω, 0 – 50 V DC voltages, max reading of the resistance of 3200 digits and voltage of 5000 digits. It has an optional USB interface which can be used for remote control and data acquisition and analysis makes it more suitable for assembly line tests of all kinds of batteries. Accurate open voltage can be tested out by vectorless test theory. Professional sorting function and sorting sets of the beep make it more suitable for automatic assembly line tests.


  • Portable design with dual-color protective cast shell
  • Battery and external power supply
  • TFT-LCD display, 3.5 inches display, true color 16 M
  • Automatic power off
  • Double display: ΔABS, Δ% and sorting result
  • Comparator function: GD/NG VFD show or Handler out
  • Auto zero adjustments for each range
  • Four terminal resistance measurements
  • Mini-USB interface
  • Compatible with SCPI command sets
  • Keypad lock function
  • Data hold function
  • Adjustable background brightness
  • Rechargeable Batteries
  • Max power ≤5 W
  • 8.4 V, Li-Battery 2200 mAh rechargeable battery
  • Temperature compensation
  • Customizable beep feature

Technical Specifications

Parameters AC resistance, DC Voltage
Accuracy Resistance 0.5 % ± 5 digits

Voltage: 0.5 % ± 5 digits

Measurement Range Resistance: 0.1 mΏ to 200.0 ΏV

Voltage: 0.0001 V to 50 V

Signal Source AC: 1kHz

Open-Circuit Voltage: <30 mV

Current: <15 mA

Range Automatic, manual, nominal, 4 ranges
Speed 2 times per second
Result Display ABS/PER/SEQ
Display Max Resistance : 3200

Voltage : 5000

Max Resolution Resistance : 0.01 mΏ

Voltage : 1 mV

Adjustment Short-circuit reset to each range
Comparator Voltage comparison separately, resistance comparison separately, voltage and resistance combination comparison and GD/NG sorting result display. Adjustable beep
Trigger Internal, manual and remote
Test Terminal 4 terminal shielding and external shielding ground section
Interface Built-in-mini-USB charging interface

U disc interface

Power Input: 100 V -240 V to 50 Hz/60 Hz 0.35 A

Output: 9V 1A DC 8.4v, Li, 2200 mAh rechargeable battery

Dimensions 5.12 in x 8.29 in x 1.49 in

(130.23 mm x 210.76 mm x 37.88 mm)

Weight  1.10 lbs (500 g)
Working Time ≥8h @25 % Brightness
Temperature and humidity range: 59 ◦ F to 95 ◦F (15 ◦C to 35 ◦C), 80 % RH or less
Storage temperature and humidity range: 50◦ F to 104◦F (10 ◦C to 40 ◦C), 10 % to 90 % RH

Additional Information


  • Internal resistance and voltage of the battery
  • Alkaline batteries, Life assessment lead batteries
  • UPS online measurement
  • Batteries identification test
  • Super capacitor ESR measurement
  • Contact resistance and internal resistance of battery

Main Functions:


Short-circuit clear zero correction for all ranges.

Comparator (Sorting Function):

 Set up the sorting function for GN/DG sorting

Comparator methods:

  • Absolute value of tolerance ± TOL sorting
  • Percentage tolerance %TOL sorting
  • Sequence comparison sorting

Beep Feature:

  • Beep: OFF/GD/NG
  • System Setup
  • Keypad lock function
  • Time and Date settings
  • Language switch option
  • Administrator account settings
  • Background brightness settings
  • Auto power off settings
  • Remote Control
  • Max baud rate: 115200 bps
  • SCPI available
  • ASCII transmit


  1. USB Host port
  2. Mini-USB Slave Port
  3. Reserved Interfaces
  4. Power Adaptor
  5. Power Adaptor

Replace Battery

The instrument has built-in rechargeable battery and it has been installed in the battery compartment of the instrument. Replace the battery according to the following procedure.

Power Supply:

The instrument can be powered by Li battery. When the battery is low, power adaptor is used to charge the battery.

Turn ON/OFF:

To turn ON/OFF the instrument press the power key.

Test Slots

Insert the cable box into test slots.

Clips and cables:

Using the clips and cables of other brands may cause damage and after 1 to 2 years the surface of the accessories may get damaged which will leads to inaccuracy.

Front Panel Summary:



Press [Meas] key to enter <MEAS DISPLAY>Page.

The <MEAS DISPLAY> page includes following setup:

Trigger Mode [TRIGGER]

Measurement Range [RANGE]

Test Speed [SPEED]

Comparator [COMP] ON/OFF

[BEEP] Feature

Soft-key VIEW DATA – To Enter [VIEWDATA] page

Soft-key SAVE DATA – To Store current measurement result into internal flash disk



It supports Three trigger modes:

  • Internal Trigger
  • Manual Trigger
  • BUS Trigger

Trigger Setting:

Internal Internal trigger
Manual Press the [Enter] key once, the instrument runs a test cycle
BUS The instrument runs a test cycle by receiving RS232 trigger command.
  • Procedure to set the trigger:
Step 1 Press [Meas] key to enter <MEAS DISPLAY> page
Step 2 Use cursor keys to select [TRIGGER] field
Step 3 INT Automatic Internal trigger
MAN Manual trigger by pressing [Trig] key
BUS BUS trigger by RS232 SCPI command

 Resistance [RANGE]

It has three range modes:

  • AUTO range
  • Manual range
  • Nominal range

Resistance Ranges:

Range Description Pros Cons
AUTO Automatically.

Impedance range is automatically set by selecting the best range

Convenient Test speed is slower than manual ranging
HOLD The instrument will always use the user-specified range Highest speed Set the range initially
NOMINAL Automatically

Select the best range according to nominal value

Best mode for sorting Only available in sorting mode

Resistance Measurement Range:

Range Range Name Measurement Range
5 2 kΩ 200 Ω ~ 2.2 kΩ
4 200 Ω 20 Ω ~ 220 Ω
3 20 Ω 20 Ω ~ 220 Ω
2 2 Ω 2 Ω ~ 22 Ω
1 200 mΩ 200 mΩ ~ 2.2 Ω
0 20 mΩ 0 mΩ ~ 22 mΩ

 Procedure of setting the range:

Procedure to set the trigger:

Step 1 Press [Meas] key to enter measurement page
Step 2 Use the cursor key to select [RANGE]
Step 3 AUTO Auto range
HOLD Current range is hold
NOMINAL Select the range according to resistance nominal value [ResNom]
INCR+ Increase range
DECL- Decline range

The DC voltage measurement range cannot be selected. Instrument always use automatic mode.

Test Speed:

SLOW, MED and FAST test speed can be selected.

Procedure to set test speed:

Step 1 Press [Meas] key to enter measurement range
Step 2 Use the cursor key to select [SPEED] field
Step 3 SLOW

Comparator [COMP]

Set the comparator parameter in <SETUP> page and the page is about how to turn on/off the comparator.

Step 1 Press [Setup] key to enter measurement range
Step 2 Use the cursor key to select [COMP] field
Step 3 OFF Comparator off
ON Comparator on

[BEEP] Feature:

Procedure to set the beep

Step 1 Press [Meas] key to enter measurement range
Step 2 Use the cursor key to select [SPEED] field
Step 3 OFF Turn beep off
GD Beep while pass
NG Beep while fail

Icons on <MEAS Display>

Icon Description
  Powered by Li battery
  Powered by external power supply
  USB-Disk is available
H Hold current data

< SETUP> page

Press [Setup] key to enter <SETUP>page.

In <SETUP> page, if the testing is not progress the Instrument does not display the measurement result and comparator result.

The <SETUP> page includes following setup:

  • Trigger Mode [TRIGGER]
  • Measurement Range [RANGE]
  • Test Speed [SPEED]
  • Comparator [COMP] ON/OFF
  • BEEP Feature
  • Soft key CLEAR ZERO – Clear Zero Correction
  • RESMODE – AC Resistance Sorting Methods
  • VOLTCOMP– DC Voltage Sorting Methods
  • ResNom – Input Resistance Nominal Value
  • ResLow – Input Resistance Low Limit
  • ResHigh – Input Resistance High Limit
  • VoltNom – Input Voltage Nominal Value
  • VoltLow – Input Voltage Low Limit
  • VoltHigh – Input Voltage High Limit

Some settings can be also set up in <MEAS DISPLAY> page.

Short-circuit Clear Zero [CLEAR ZERO]

Press [Setup] key to enter < SETUP> page, and then press [CLEAR ZERO] soft key to do short-circle clear zero. Once it’s done with short-circuit clear zero the value will be saved into internal flash disk.


It is necessary to do short-circle clear zero. When replace the test fixture or test cables, it is must to do short –circle clear zero.

Connect the test clip as shown in the below figure.

RS232 [BAUD] rate

Connect the instrument to computer via Mini-USB to RS-232 port and the instrument will communicate with PC, meanwhile the keypad will be locked. Use the SCPI language in Mini-USB programming.

Mini-USB to RS-232 format:

  • Data bits: 8
  • Stop bits: 1
  • Parity: none
Step 1 Press [SYSTEM] bottom soft key to enter <SYSTEM CONFIG> page
Step 2 Use the cursor key to select [BAUD] field
Step 3 1200 For the communication, converter opt with coupler isolation
115200 Best for communication with PC


Step 1 Press [Meas] or <Setup>key to enter main page
Step 2 Press bottom soft key [SYSTEM] to enter <SYSTEM CONFIG>
Step 3 Press soft key [SYSTEM INFORMATION] to enter <SYSTEM INFORMATION> page

AC Resistance Range:

Range Max. Reading Resolution FAST MED SLOW Test Current
1 200 mΩ 220.0 mΩ 0.1 mΩ 0.8 % ± 4 0.6 % ± 3 0.5 % ± 2 1 mA
2 2 Ω 2.200 Ω 1 mΩ 0.8 % ± 4 0.6 % ± 3 0.5 % ± 2 0.1 mA
3 20 Ω 22.00 Ω 10 mΩ 0.8 % ± 4 0.6 % ± 3 0.5 % ± 2 10 µA
4 200 Ω 220.0 Ω 100 mΩ 0.8 % ± 4 0.6% ± 3 0.5 % ± 2 5 µA

Open-circuit Voltage: < 30 m Vrms

DC Voltage Range:

Range Max. Reading Resolution FAST MED SLOW
1 5 V 5.0000 V 1 mV 0.5 % ± 5 0.5% ± 3 0.5 % ± 2
2 50 V 50.000 V 10 mV 0.5 % ± 5 0.5% ± 3 0.5 % ± 2

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