Midtronics MDX-655 User manual
For 6 & 12-volt automotive starting batteries
and 12 & 24-volt starting/charging systems
INSTRUCTION MANUAL
MDX-655
Battery Conductance &
System Analyzer
Battery Conductance and
Electrical System Analyzer
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•3•
Contents
Safety Guidelines 5
Capabilities 5
Registering Your MDX-Series Tester 7
Display and Keypad 7
User Interface 8
UP and DOWN Arrows 8
ENTER Button 8
BACK/PRINT Button 8
MENU Button 8
Options Menu 9
Procedure 9
Preparations Before the Test 10
Connecting the Tester 10
Battery Test 11
Battery Test Results 12
New Battery Test Results 12
Starter System Test 14
Starter System Test Results 14
Charging System Test 15
Charging System Test Results 15
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Test Messages 17
Error Messages 18
Maintenance & Troubleshooting 19
Changing The Cable Assembly 19
Troubleshooting the Display 20
Replacing the Battery 21
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•5•
!
Safety Guidelines
Because of the possibility of personal injury, always use extreme caution when
working with batteries.
Battery posts, terminals, and related accessories contain lead and lead
compounds. Wash hands after handling.
Capabilities
The tester tests 6 & 12-volt regular ooded, AGM at plate, AGM spiral, and GEL
batteries. It displays the test results in seconds and features a built-in printer to
provide customers with a copy of the results.
Additional features include the ability to:
• testtheStartingandChargingsystem
• testbatteriesfromratedfrom100to2000CCA
• detectbadcells
• protectagainstreversepolarity
• testdischargedbatteries
• testmultipleratingsystems
• provideamulti-lingualuserinterface.
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Registering Your MDX-Series Tester
Before using your tester, we recommend that you register it online to activate
your warranty. Registration will also make it faster and easier for you to obtain
technical support and service.
To register, log on at www.midtronics.com/warranty.html and have your serial
number ready. The number is at the bottom of the label on the back of the
tester.
Display and Keypad
When you rst connect the tester to a battery, it functions as a voltmeter until
you press the ENTER button.
IMPORTANT:Ifyouconnectthetestertoavoltagesourcegreaterthan30Vdc,
you may damage the tester’s circuitry.
The menu-driven display will then guide you step by step through the test
process. Use the keypad buttons to scroll to and select options in the menu.
To turn o the tester when not connected to the battery, briey press and hold
the MENU button.
Serial Number Label
Serial
number
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•8•
User Interface
1 UP and DOWN Arrows
Use these keys to choose test
parameters and scroll to menu
options.
2 ENTER Button
Use this button to make
selections.
3. BACK/PRINT Button
Use this button to move to
the previous screen or move
back one space when creating
custom headers. You can also
use this button to printout test
results using the built-in printer.
4 MENU Button
Use the MENU button to
access the Main Menu options
of the tester.
For information about the
options, see “Options Menu”.
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1
2
Display Showing
Battery Result
3
4
IR Output
Decision
Measured rating
Measured voltage
Selected rating
Button
Toolbar
•9•
Option Explanation
View/Print Display the previous test result. Press the PRINT
button to print the results.
QC Mode A quick test to check battery inventory
Export Data Export the last test result to an IR Reader program.
Perform Test Begin the Battery Test procedure.
Language Selection Select a language for the tester.
Set Address Enter the address to display on the top of the printout.
(Limit: 8 lines, 21 characters per line)
Time Select 24-hour or AM/PM and set the time.
Date Select the date format as well as set the correct date.
Counter Clear or display battery and system test by results.
Contrast Adjust the contrast setting of the tester display.
Temperature Units Select the temperature units
Degrees F or Degrees C
Voltmeter Automatically test battery voltage when the clamps are
rst connected to the battery terminals. Press ENTER
to continue testing the battery. Press BACK to return to
the menu. (Default: ON)
Options Menu
Procedure
1. Press the MENU button to access the Options Menu.
2.
Use the UP (p) and DOWN (q) arrows to move to the line you want to
edit.
3. Press the ENTER button to make highlighted line editable.
4. Use the UP (p) and DOWN (q) arrows to select the character for that cur-
sor location.
5. Press the ENTER button to move to the next location.
6. Press the MENU button to return to the Options Menu.
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•10 •
Preparations Before the Test
Before connecting the tester, clean the battery posts with a wire brush and a
mixture of baking soda and water. When testing side-post batteries, install and
tighten lead terminal adapters.
IMPORTANT: Do not test at steel bolts. Failure to install terminal adapters or
installing terminal adapters that are worn or dirty may result in inac-
curate test results. To avoid damage, never use a wrench to tighten the
adapters more than 1/4 turn.
If you are testing in the vehicle, make sure all accessory loads are o, the key is
not in the ignition, and the doors are closed.
Connecting the Tester
• Connecttheredclamptothepositive(+)terminalandtheblackclampto
the negative (–) terminal.
• For a proper connection, rock the clamps back and forth.The tester re-
quires that both sides of each clamp be rmly connected before testing. A
poorconnectionwillproduceaCHECKCONNECTIONorWIGGLECLAMPS
message. If the message appears, clean the terminals and reconnect the
clamps.
• Thepreferredtestpostionisatthebatteryterminals.Ifthebatteryisnot
accessible, you may test at the jumper post; however, the available power
measurement may be lower than the actual value.
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