ALL-TEST PRO ATPOL II, User Manual

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Checking out Connections using PSM
The Power System Manager (PSM) software is included in the cost of your ATPOL II meter. You can
use it to visually determine if the system connections and levels are correct. Use ATPOL II
’s patented
SureStart feature for a fast reliable approach to checking that connections and settings are correct.
Checking Voltage Levels
– Using PSM
As an alternative to using SureStart
TM
, you can capture a waveset (a set of 7 time-coincident
waveforms) and analyze it graphically. Refer to the Saving Consumption Waveforms section if you do
not know how to capture waveforms with the meter.
Once a waveform has been captured, at the main
menu click on “Receive Waveform”, then “Receive
and View”. A waveset will be transferred from
ATPOL II to PSM and then a dialogue box opens
asking you to choose what signals to view. Make
your primary choice “Voltage”, and your secondary
choice
“Set All”. Next click on “View”.
Now that you are viewing the voltage waveforms, there are
several questions that need to be answered. First of all, is
the voltage measurement mode correct? If the
measurement mode is phase-neutral, all measurement
labels at the top will be V
1N
, V
2N
, and V
3N
. The first letter
after the “V” is the phase that is connected to and the "n"
stands for neutral. If no neutral is connected to ATPOL II,
this measurement is in reference to the neutral point
between all the phases that are connected. If the
measurement mode is phase-phase
(as shown in the
example) , the labels will be V
12
, V
23
, and V
31
. V
12
is the
voltage potential between phases 1 and 2. Changing the
measurement mode has a large effect on the size of the
voltage readings. For instance, in a three-phase 120 volt
phase-neutral (wye) system, the voltage measurements in phase-phase mode will be 208 volts (
120 3

). Similarly, a three-phase 480 volt phase-phase (delta) system will display 277 volts (
480 / 3
) if it is measured in phase-neutral mode. How to change the voltage measurement mode is
described in the Phase-Neutral vs. Phase-Phase vs. 2 Current Mode section.
Next, are the sizes of all three phases about the same (except when connected to a 4 wire delta while
in phase-neutral measurement mode)? Are they the expected size? The RMS value of each waveform
is listed in the heading of the graph (such as “V
12
” in the example with “469.2” beneath it, indicating that
V
12
= 469.2 volts).