Here’s a step-by-step guide on how to use a shunt to verify the accuracy of the Battery Tester PITE3915. Since the resistance of a shunt is fixed and standard, we can use the Battery Tester PITE3915 to test a specific shunt. Then, we can compare the outcome with the standard resistance value of the shunt to confirm the test accuracy of the Battery Tester.
Wire the Battery Tester PITE3915, Battery and Shunt as follow. In this demo the battery is 2V 300Ah, the resistance of shunt is 1mΩ.
Turn on the Battery Tester PITE3915 and follow the instructions to switch it into Debug mode. Click "System"
Click "Version"
When the tester displays the “About” information as shown below, press the button ⬆️ for approximately 3 seconds, then press the button ⬇️ for approximately 3 seconds.
Once you’ve performed the procedure above correctly, you should be able to notice the addition of two more parameters: 29°C (inner temperature) and 7.23 (inner battery voltage). This indicates that you’ve successfully entered debug mode now. Click "Test Cell" to continue
Set "Voltage" to 2V, when the fix resistance of your shunt is less then 2.5mΩ, otherwise, set "Voltage" to 12V, then click "Start" to start the test
After the test is complete, it displays the test resistance of the shunt. In the demo, you can see that the test outcome is 983μΩ, very close to the fixed resistance of the shunt, which is 1mΩ.
Regardless of the test outcome, please also check the “Wave” section. In this section, you will see a total of four waveforms: two for voltage signals and two for resistance signals. Generally, if all the waves are normal sine waveforms as shown below, it means the tester at least successfully receive the essential signal. Otherwise, if any of the waves are abnormal, it means the tester don't successfully receive the essential signal at all.
If the test results significantly deviate from the standard resistance and the waveform appears abnormal, it’s possible that the connections of the current clamp’s No. 1 and No. 2 sockets are reversed. Simply try again after reversing the connections. In the demo test, when we reversed the current clamps’ connection, the resistance outcome was 277μΩ instead of 983μΩ, and the waveform was clearly abnormal.
Each of our Battery Tester PITE3915 and its current clamps has undergone numerous tests before shipping. If you’re using new Tester and Clamps from our factory to perform the test accurately, we guarantee that the test resistance from our Tester will match the original resistance of the shunt. However, if you’re using old Tester and Clamps and the test outcome fails, it indicates that the Tester or its clamps are severely damaged and require repair or replacement.