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7

 

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 first connect the tester to a battery, it functions as a voltmeter until 

you press the 

ENTER

 button.

IMPORTANT:

 If you connect the tester to a voltage source greater than 30 Vdc, 

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 off the tester when not connected to the battery, briefly press and hold 

the 

MENU

 button.

Serial Number Label

Serial 

number

www.midtronics.com

Summary of Contents for MDX-655

Page 1: ...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...

Page 2: ...Blank page...

Page 3: ...rows 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 Res...

Page 4: ...4 Test Messages 17 Error Messages 18 Maintenance Troubleshooting 19 Changing The Cable Assembly 19 Troubleshooting the Display 20 Replacing the Battery 21 www midtronics com...

Page 5: ...egular flooded AGM flat 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 i...

Page 6: ...6 www midtronics com...

Page 7: ...he back of the tester Display and Keypad When you first connect the tester to a battery it functions as a voltmeter until you press the ENTER button IMPORTANT If you connect the tester to a voltage so...

Page 8: ...us 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...

Page 9: ...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 voltag...

Page 10: ...e sure all accessory loads are off the key is not in the ignition and the doors are closed Connecting the Tester Connect the red clamp to the positive terminal and the black clamp to the negative term...

Page 11: ...ore any further system testing BAT AGE Select new battery or in service New battery battery is fresh produced and not yet installed in a ve hicle For instance the battery is in a warehouse waiting for...

Page 12: ...REPLACE BATTERY Replace the battery and retest A REPLACE BATTERY result may also mean a poor connection between the battery cables and the battery After disconnecting the battery cables retest the bat...

Page 13: ...TE For an in vehicle test the display alternates between the test results and the message PRESS FOR STARTER TEST See Maintenence Troubleshooting in this manual for more information about the printer I...

Page 14: ...ion CRANKING NORMAL The starter voltage is normal and the battery is fully charged LOW VOLTAGE The starter voltage is low and the battery is fully charged CHARGE BATTERY The starter voltage is low and...

Page 15: ...or output detected Check all connections to and from the alternator especially the connection to the battery If the connection is loose or heavily corroded clean or replace the cable and retest If the...

Page 16: ...hat requires replacing the alternator In older vehicles that use external voltage regulators you may need to replace only the voltage regulator EXCESSIVE RIPPLE Excessive AC ripple detected One or mor...

Page 17: ...CHECK CONNECTION One or both clamps are not making proper contact with the battery terminals ENGINE REV NOT DETECTED PRESS WHILE REVVING Tester has not detected an increase in engine r p m REVERSE CO...

Page 18: ...S REPLACE AA BATTERIES SOON Internal AA batteries are low and need to be replaced See Maintenance Troubleshooting section NON 12 VOLT SYSTEM DETECTED System being tested is not 12 volts QC DATA MEMORY...

Page 19: ...Assembly 1 Identify the circled screw 2 Remove the screw 3 Grasp the housing and firmly pull the cable assembly from housing 4 To attach a new cable align the cable and tester housings and push to get...

Page 20: ...tery The vehicle battery may be too low below 1 volt to power the analyzer Fully charge the battery and retest The analyzer s AA batteries may need to be replaced alkaline recom mended If the analyzer...

Page 21: ...tup information will be retained while you change the internal batteries Use the following procedure to remove and replace the internal AA batteries 1 Turn the tester face down 2 Remove the screw secu...

Page 22: ...22 www midtronics com...

Page 23: ...equipment static damage water damage overvoltage dropping unit or damage resulting from extraneous causes including owner misuse Midtronics is not liable for any incidental or consequential damages fo...

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