Tachometer Frequently Asked Questions
Question number FAQ-0937
When using the TM-3100 and setting the input amplifier type to PULL UP, what voltage and resistance value are used for the pull-up connection?
The power supply is 12V, and the resistance is 1kΩ. It is pulled up via an analog switch. It will not operate unless the low level of the connected external device is 1V or less.
Last updated: 2013-03-26