Measuring Current - Tektronix DMM4040 User Manual

DMM4040/4050
Users Manual
To make a four-wire resistance measurement using Tektronix's 2X4 test leads:
1. Connect the test leads to the Meter's input connectors as show in Figure 4-3.
2. Press N.
3. If not already highlighted, press the 2X4WIRE soft key.
Function modifiers:
Refer to the "Range Keys" section in Chapter 3 of this manual for information on how to
adjust the measurement range.

Measuring Current

The Meter is capable of making both ac and dc current measurements up to 10 A. Two
separate input connectors, in conjunction with the LO connector, are used for current
measurements. For best resolution, current measurements not exceeding 400 mA should
be made using the LO and mA input connectors as shown in Figure 4-4.
4-10
Figure 4-3. Input Connections for 4-wire Ohms Using 2x4 Wire Leads
A filter for quieting noisy measurments. This filter averages readings
D FLTR
to reduce reading noise when in immedicate trigger mode or when in
trigger mode with an unending number of triggers selected. The filter
is only available for dc functions at rates slower than 1 PLC. The
number of readings averaged by the digital filter varies with dc
function and range.
A 3-pole analog filter for improving noise immunity. The filter is
A FLTR
active when this soft key's label is highlighted.
Ground tab
INPUT SENSE
V 4 W
2W/4W 2
HI HI
1000 V CAT I
300V
600V CAT II
LO LO
1V
FUSED
4 00
10A
mA
REAR FRONT
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