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BAT 155 | REV. A | October 2020

Introduction | 

BAT 155 Battery Tester

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5

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en

Paper Loading/Replacement

Do the following to load paper:

1.  Connect BAT 155 to battery. (See Pg. 5 for connection instructions.)
2.  Pull up the cover lifter to open the clear cover. (See Fig. 1) Insert a new 

paper roll into the printer compartment with the leading edge coming out 
from under the paper roll. Pull a short length of paper from the 
compartment and press down the clear cover to close and snap in place. 

Note: 

Tester will not print if cover is not snapped in place. (See Fig. 2)

 

Note:

 Replace

ment thermal paper rolls are available at most office supply 

retailers. The paper is 2 1/4 in. wide, with a maximum roll length of 98 ft.

Before Testing Begins 

1.  Install/verify that there are  6 AA alkaline 1.5V batteries installed into the  

tester battery chamber located on the back of the unit. Li-Ion or lithium 

batteries are not recommended because of the initial 1.7 Volt output. When 

the batteries are weak, the screen will display “POWER LOW.” Replace all 6 

batteries at the same time. 

Note: 

Nothing will be seen on the display until 

the tester is connected to a vehicle battery. Each time the tester is 

connected to a battery, the tester will run a quick cable verification to 

ensure a proper connection through the output cables to sensors in the 

clamp jaws. If the connection checks out OK, the display will momentarily 

flash and proceed to the Home Screen. In operation the tester will only 

show three results: CHECK CLAMPS / VOLTAGE HIGH / VOLTAGE LOW.

2.  Ensure that the area around the vehicle battery is well ventilated while the 

battery is being tested.

3.  Clean battery terminals. Be careful to keep corrosion from coming in 

contact with your eyes.

(Figure 1)

(Figure 2)

Summary of Contents for BAT 155

Page 1: ...BAT 155 Battery Tester Operating Instructions en US ...

Page 2: ...ctober 2020 Contents 1 Introduction 3 2 Safety Warnings and Instructions 4 3 Paper Loading 5 4 Before Testing Begins 5 5 Testing One Battery 6 6 Testing Multiple Batteries 7 7 System Test 8 8 Amp Volt Meter Testing 11 9 Settings 12 10 Warranty Terms and Conditions 13 ...

Page 3: ...ack Voltmeter Jack USB Port SYSTEM ANALYZER 1 Introduction The BAT 155 Battery Tester is used to test 6 and 12 volt batteries and to test 12 and 24 volt charging systems ONLY 12 volt for battery pack testing The suggested operation range is from 0 degrees Centigrade 32 degrees Fahrenheit to 50 degrees Centigrade 122 degrees Fahrenheit in ambient temperature ...

Page 4: ... on these items Another person should be within range of your voice or close enough to come to your aid when you work near a lead acid battery Have plenty of fresh water and soap nearby in case battery acid contacts skin clothing or eyes Wear safety glasses and protective clothing If battery acid contacts your skin or clothing wash immediately with soap and water If acid enters your eye immediatel...

Page 5: ...line 1 5V batteries installed into the tester battery chamber located on the back of the unit Li Ion or lithium batteries are not recommended because of the initial 1 7 Volt output When the batteries are weak the screen will display POWER LOW Replace all 6 batteries at the same time Note Nothing will be seen on the display until the tester is connected to a vehicle battery Each time the tester is ...

Page 6: ...and hold Left Arrow Key INTERPRETING TEST RESULTS The battery is good and capable of holding a charge The battery is good but needs to be recharged The battery will not hold a charge It should be replaced immediately TEST RESULT GOOD PASS SOH SOC VOLTAGE TEST RESULT GOOD RECHARGE SOH SOC VOLTAGE TEST RESULT BAD REPLACE SOH SOC VOLTAGE 4 Inspect the battery for cracked or broken case or cover If th...

Page 7: ...ads Close all vehicle doors and the trunk lid Ensure the battery terminals are clean Wire brush them if necessary Leaving all the batteries connected to each other select one battery to connect the tester to Clamp the red tester lead to that battery s positive terminal Clamp the black tester lead to the corresponding negative battery terminal Note Battery pack testing can only be performed on 12V ...

Page 8: ...EST RESULTS The battery is good and capable of holding a charge The battery is good but needs to be recharged The battery will not hold a charge It should be replaced immediately 7 System Test CAUTION Before testing a battery in a vehicle turn off the ignition and all accessories and loads Close all vehicle doors and the trunk lid 1 Ensure the battery terminals are clean Wire brush them if necessa...

Page 9: ... is rotating with engine running If the belts are slipping or broken replace the belts and retest Check the connections from the alternator to the battery If the connection is loose or heavily corroded clean or replace the cable and retest If the belts and connections are in good condition replace the alternator The system is showing normal output from the alternator no problems detected Press the...

Page 10: ...d the current for the battery Check the belts to ensure the alternator is rotating with engine running If the belts are slipping or broken replace the belts and retest Check the connec tions from the alternator to the battery If the connection is loose or heavily corroded clean or replace the cable and retest If the belts and connections are in good condition replace the alternator The system is s...

Page 11: ...ed to vehicle battery 1 Install a 9V battery in the Volt Amp Meter 2 Plug Amp meter into the Amp Jack on the BAT 155 3 Use Arrow Keys to select Volt Amp Test then press the Enter Key NOTE To cancel test procedure press and hold Left Arrow Key AMP METER TEST 1 Press zero button on the Amp probe Ensure the display on the BAT 155 displays a zero 2 Press the side button to open jaws and clamp around a...

Page 12: ...ld occur 9 Settings NOTE BAT 155 Battery Tester must be connected to vehicle battery 1 Use Arrow Keys to select Settings then press the Enter Key 2 Use the Arrow Keys to scroll down through the list below Press the Enter Key to select a setting category Use the Arrow Keys to navigate the options and press the Enter Key to lock in the selection NOTE To return to the main settings screen press Left ...

Page 13: ...ranty cannot be authorized without proof of purchase Warranty claims must be sent pre paid with dated proof of purchase Damage incurred during shipment is the responsibility of the shipper customer returning unit If the returned unit qualifies for warranty the shipper will only incur shipping cost The manufacturer reserves the right to substitute or offer alternative warranty options at its discre...

Page 14: ...Bosch Automotive Service Solutions Inc 655 Eisenhower Drive Owatonna MN 55060 USA www boschdiagnostics com PN 1699503014 ...

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