Voltech PM100 User Manual

PM100 / 300 U
SER
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ANUAL
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MENU S
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VPN 98-052 P
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This mode displays one cycle of the input waveforms. The waveforms are
automatically scaled to fit the display, voltage on CH1 always being the larger.
Since the waveforms are scaled for easy viewing, they should not be used for
comparative measurements. The peak values of the waveform are shown
alongside. This mode is not available in Ballast mode.
Barchart Display Mode
Displays bargraphs of voltage or current harmonics. All 50 harmonics are
displayed, and individual detail can be displayed by pressing the [<] or [>] keys
to scroll through the harmonics.
Fast Mode
In this mode the display averaging is reduced to provide a rapid response to
changing inputs. This mode is not available in Ballast mode.
Long Averaging (PM100 Only)
This mode may be used to average measurements over a long interval from 10
to 300 seconds.
Normally, the PM100 samples the waveforms at 200kHz and updates the
display approximately every ½ second. This is ideal for most measurement
applications.
When there are transient or burst signals, however, and it is the average
measurements over a long period of time that are required, then ‘Long
Averaging’ should be enabled. ‘
9
’.
The averaging time should be several times longer than the cycle of operation of
the equipment under test. See also the ‘low-power standby measurements’
example later in this manual.
Equipment Cycle Time Example Long Averaging Time
< 1 second Power supply in low
power standby mode.
10s
1 < 10 sec Signs, message boards,
oscillating fan.
100s
10< 60 sec Soldering iron. 300s
> 60 sec Washing machine 300s + Integrator.
All measurements, including harmonics, are available in long averaging mode.
Notes.
1) The display update rate varies with the averaging time used (10 to 3000
seconds). To indicate the analyzer is averaging, the red PROG led flashes
whenever this mode is enabled.
2) To reset the averaging, press the PROG key.
3) To cancel this mode, return to the menu system and disable Long
Averaging.
4) For equipment with very long cycles of operation (e.g. washing machine)
use the long averaging mode and the integrator together.
5) The sample rate in this mode is 200kHz.
6) If this command is not documented in your RS232 or IEEE488 interface
card manual, the format is :AVG:LNG nnn where nnn is an integer in the
range 10 to 300. :CFG 1,0 & :AVG:AUT or :AVG:FIX nn must be used to
return to normal mode.

Voltech PM100 Specifications

General

Brand	Voltech
Model	PM100
Category	Measuring Instruments
Language	English