Transmille 8000 Series - Manual (Page 39)

8000 SERIES OPERATION MANUAL
TRANSMILLE LTD. Page 38
Zeroing Current Ranges
Current ranges are easily zeroed by simply open circuiting the terminals and nulling the range
Diagram : Current Null using open circuit terminals
2-Wire null method (all ranges) [Except Electrometer]
The recommended method is to short together the ‘measurement’ end of the test leads and zeroing
the DMM. Using this technique the resistance of the test leads will also be zeroed out.
Diagram : 2-Wire resistance Null shorting test leads at measurement end
4-Wire null methods (10kOhm and below)
It is recommend to connect the voltage sense test leads to the voltage sense terminals of the
resistor, and short together at the negative current terminal of the resistor the measurement current
leads. With this connection there is no current flowing in the resistor and therefore can be no voltage
across it - the DMM can then be zeroed. This will remove all thermal EMF voltages in the test leads.
To make a measurement simply connect the positive measurement current lead to the positive
current terminal on the resistor.
Diagram : 4-Wire resistance Null shorting current leads at measurement end
CURRENT TERMINALS
LEFT OPEN CIRCUIT FOR
CURRENT RANGE NULL