Operator`s manual

3.4 DMM Input Connectors
Before using the DMM, please take a few moments and review this section to understand where the voltage,
current, or resistance and other inputs and outputs should be applied. This section contains important
information concerning voltage and current limits. Do not exceed these limits, as personal injury or damage
to the instrument, your computer or application may result.
Figure 3-1. The DMM input connectors.
V, Ω + This is the positive terminal for all Volts, 2WΩ, capacitance, diode and inductance measurements, and for
sourcing of VDC, VAC and IDC. It is also the Source HI for 4WΩ measurements. The maximum input across V, Ω
+ and V, Ω - is 300 VDC or 250 VAC when in the measuring mode. When in the sourcing mode, the maximum
input allowed before damage occurs is 100 volts.
V, Ω - This is the negative terminal for all Volts, 2WΩ, capacitance diode and inductance measurements, and or
sourcing of VDC, VAC and IDC. It is also the Source LO for 4WΩ. Do not float this terminal or any other
DMM terminal more than 300 VDC or 250 VAC above Earth Ground. (Also, see Trig, 6W Guard below.)
I + This is the positive terminal for all Current measurements. It is also the Sense HI for 4WΩ measurements and
6WΩ guarded measurements. The maximum input across I, 4WΩ + and I, 4WΩ - is 2.5 A. Do not apply more
than 5 V peak across these two terminals!
I – This is the negative terminal for all Current measurements. In the Current modes, it is protected with a 2.5 A,
250 V Fast Blow fuse (5 x 20 mm). It is also the Sense LO for 4WΩ measurements and 6WΩ guarded
measurements. V, Ω - and I, 4WΩ - should never have more than 5 V peak across them.
Signametrics 28