8
NOTE
: The loop power mode can only be enabled while in the mA
measure mode.
E. Voltage Measure
Figure 6
shows how to connect the PCL120 to measure DC voltage up to
28 volts. To activate the volts measure function simply press the
key to toggle through the functions until the volts measure mode is
reached. The input impedance of the PCL120
≥
1 meg ohm while in this
mode.
Figure 6 - Measuring 0 to 28 VDC
5. Advanced Operating Modes
A. Auto Step/Ramp Mode
The PCL120 has the ability to step the mA output in 25% steps
automatically in 5 second intervals. It can also ramp the mA output from 4
mA to 20 mA then back to 4 mA in a linear fashion automatically.
To activate the Auto-Step/Ramp mode use the following procedure:
1) The Auto Step/Ramp function can be used in either the source mA or
simulate mA mode. Place the PCL120 in one or the other mode.
2) Connect the PCL120 to the device under test.
3) Press the
key once for the step mode, twice for the slow
ramp mode and three times for the fast ramp mode. With each press a
small annunciator will appear on the lower left side of the LCD indicating
AUTO
MODE