Probe high current needle 120 needle head diameter is 3.0 threaded needle high current needle total length is
Photocoupler
DC millivoltmeter and circuit
The figure is a simple method to change the 1MA meter range to a DC millivoltmeter with a full-scale sensitivity of 1mV, 10mV, and 100mV. If the input compensation voltage of the op amp is to be zeroed, the input can be shorted and R6 can be adjusted to zero the meter.
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