UNI-T UT673A Automotive Battery Tester, 12 V, 3–250 Ah, CCA 40–2000 A

UNI-T UT673A Automotive Battery Tester, 12 V, 3–250 Ah, CCA 40–2000 A

The UNI-T UT673A is designed for testing the condition of 12 V lead-acid automotive starting batteries and for checking 12/24 V vehicle cranking and charging systems. It displays battery voltage, internal resistance, state of charge (SOC), state of health (SOH) and measured cold-cranking capability. Its four-terminal Kelvin test method and support for multiple battery rating standards allow testing without removing the battery from the vehicle.

Key specifications: 12 V battery test 7–16 V DC • 12/24 V cranking and charging system test 7–30 V DC • 3–250 Ah • CCA 40–2000 A • four-terminal Kelvin test

Key advantages

• 12 V starting-battery test – allows the condition of an automotive lead-acid battery to be assessed without removing it from the vehicle.
• 12/24 V cranking-system test – helps evaluate the vehicle starter and cranking system.
• 12/24 V charging-system test – checks charging-system and alternator operation, including charging-voltage and ripple evaluation.
• SOC and SOH indication – displays state of charge and battery state of health.
• Internal-resistance measurement – provides additional information about battery condition; the manufacturer specifies an internal-resistance measurement accuracy of ±(1% rdg + 6 dgt).
• Four-terminal Kelvin measurement – dual-conductor Kelvin clamps help reduce the influence of lead and contact resistance.
• 10 battery rating standards / modes – supports CCA, BCI, CA, MCA, JIS, DIN, IEC, EN, SAE and AH.
• Multiple lead-acid battery types – supports conventional lead-acid, AGM flat plate, AGM spiral, GEL and EFB batteries.
• Reverse-connection and overvoltage protection – also provides a poor-contact warning.
• Colour LED result indication – UT673A supplements the display result with visual LED indication.

Applications

The UT673A is intended for checking automotive starting batteries, routine vehicle maintenance and basic fault diagnosis. It can be used before winter, after a vehicle has been parked for an extended period, when engine starting becomes difficult, or when the starter and alternator systems need to be checked.

It is suitable for vehicle owners, maintenance technicians, automotive workshops and other users who need a quick assessment of a 12 V starting battery and a 12/24 V vehicle starting/charging system.

Compatibility and limitations

• The battery-health test is intended for 12 V lead-acid starting batteries.
• Supported battery types are conventional lead-acid, AGM flat plate, AGM spiral, GEL and EFB.
• The 24 V capability applies to vehicle cranking and charging-system testing, not to a standalone 24 V battery-health test.
• Lithium-battery support is not specified by the manufacturer; therefore the UT673A should not be treated as a lithium-battery tester.
• Normal testing cannot be performed if the connected battery voltage is below 7.0 V.
• UT673A does not provide USB data transfer or a built-in printer. These functions are available on the UT675A.
• Menu languages are English and Chinese.

Technical specifications

Parameter	Value
Model	UNI-T UT673A
Product type	Automotive battery and cranking/charging-system tester
Applicable battery	12 V lead-acid starting battery
Battery-test voltage range	7–16 V DC
Cranking-system test	12/24 V, 7–30 V DC
Charging-system test	12/24 V, 7–30 V DC
Battery capacity range	3–250 Ah
Battery types	Lead-acid, AGM flat plate, AGM spiral, GEL, EFB
CCA range	40–2000 A
BCI range	40–2000
CA range	40–2000 A
MCA range	40–2000 A
JIS range	26A17–245H52
DIN range	40–1400
IEC range	40–1400
EN range	40–2000
SAE range	40–2000
AH mode	3–250 Ah
Test method	Four-terminal Kelvin
Internal-resistance measurement	Yes
Internal-resistance accuracy	±(1% rdg + 6 dgt)
Battery information displayed	Battery condition, SOC, SOH, voltage, measured cranking current, internal resistance
AH rapid-input mode	Yes
Charging-system ripple test	Yes
Poor-contact indication	Yes
Reverse-connection protection	Yes
Overvoltage protection	Yes
Display	128 × 64 monochrome dot-matrix LCD
LED result indication	Yes
Menu languages	English, Chinese
Stored result viewing	Last battery, cranking and charging-system test result can be viewed
USB communication	No
Printing function	No
Power supply	Powered from the connected battery / external measured source; no separate internal battery required
Relative humidity	Up to 90% RH below +35 °C; up to 60% RH at +35...+40 °C
Operating altitude	Up to 2000 m
Dimensions	76 × 22 × 142 mm
Net weight	264 g
Certifications consistently confirmed by manufacturer sources	CE, FCC

Design and operation

The UT673A uses a 128 × 64 monochrome dot-matrix display, push-button menu control and colour LED result indication. The main menu provides battery testing, cranking-system testing, charging-system testing, previous-result viewing and settings.

The tester uses dual-conductor, four-terminal Kelvin battery clamps and can perform testing without removing the battery from the vehicle.

Important operating and safety notes

• Perform the battery-health test with the engine switched off and observe correct polarity: connect the red clamp to the positive terminal and the black clamp to the negative terminal.
• During cranking and charging-system tests, start the engine only when instructed by the tester.
• A heavily discharged battery may produce an unreliable initial assessment. The manufacturer recommends charging such a battery correctly and repeating the test.
• Do not use the tester in humid, explosive or flammable environments.
• Keep the tester and contact surfaces clean and dry.
• Do not open the tester enclosure or operate the unit with a damaged or open enclosure.

Package contents

UNI-T UT673A tester with four-terminal Kelvin test leads and battery clamps.