Test procedure for early prototypes

After assembly, each board needs to be tested and approved before it may be used in a battery. The testing must be done immediately after assembly. It should take no more than a minute to test a board once the setup is in place.

Gain test

Set up the multimeters:

• One to measure microamps - up to 10 uA
• One to measure voltage - up to 10V

Set up the desktop DC supply BEFORE attaching the crocos to the board:

• 33.5V
• Turn off current
• Attach crocos
• Turn on little current

The LED should come on on the board, and you should see:

• 1.449  V +- 50mV
• 1508 uA +- 50 uA

Now:

• Turn up the voltage to 42.0V
• Turn off the current, wait for the voltage to disappear - 5 seconds
• Turn on a little current

The LED should come on on the board, and you should see:

• 10.06 V +- 0.05V
• 1231 uA +- 50 uA

If the input voltage is above 41.37V, it saturates to 10.06V.

Noise test

A fully charged 36V battery need to be connected, and the scope to measure the output:

• 20ms
• 10mV
• Measure Pk-Pk

The measured noise should be below 20 mVpp, look like this: