If the printer is selected a header is printed at the start of each weld run and a summary and at
the end.
Channels
Arc current and voltage are always monitored. If Wire Feed Speed is also require press the
WFS once (button marked DOWN:WFS:NO). The display will now change from WFS OFF
to WFS ON and the results from the WFS channel are displayed.
Set Date and Time
To set the date and time press the SET button twice (button marked SET:OFF). Pressing the
button once changes the display from SET: ON to SET: OFF, pressing again changes the
display to SET: SET. Then press the ENTER button and the display will change to show
the current DATE and TIME settings.
Use the UP and DOWN buttons to change the highlighted digits, once the reading is correct
press SET to move to the next digit. Once the display is correct press ENTER to return to
the main screen. If no activity is detected after a couple of minutes the AMV returns to the
main screen.
Connecting the probes
The current clamp, voltage leads and wire feed speed indicator are connected to the AMV as
shown in picture 2. To connect the probes to the welding power source please follow these
guidelines:
•
Arc Current
Monitored using a Hall Effect probe. It is possible to monitor both DC and AC current
waveforms. The average value is calculated from the mean (rectified) value. The probe can be
connected over either the torch or return cable, and with the current indicator facing either
direction. Over time the current probe can become polarised and an offset is introduced into
the measurement. To counter this effect, turn the clamp over so that current runs through the
clamp in the reverse direction, so that polarisation is reversed.
If a current is indicated on the main display without a welding arc, this is an offset. Turn the
zero wheel in the handle of the current probe to re-zero the measurement.
Current probes do become corrupted over time and replacements should be considered every
year.
•
Arc voltage
The arc voltage should be measured as close as possible to the arc. If this is not done the
voltage drop across the welding leads will be recorded as well as across the arc. However, it is
standard practice to measure the arc voltage at the wire feed unit for MIG welding.
•
Wire feed speed
The wire feed speed is recorded as the average value. A tachometer is mounted directly on the
wire.
The AMV 3000 is now ready to start recording weld data.
Document: AMV3000 01 002
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