NAME

Lab::Instrument::HP34401A - a HP 34401A digital multimeter

SYNOPSIS

use Lab::Instrument::HP34401A;

my $hp=new Lab::Instrument::HP34401A(0,22);
print $hp->read_voltage_dc(10,0.00001);

DESCRIPTION

CONSTRUCTOR

my $hp=new(\%options);

METHODS

read_voltage_dc

$datum=$hp->read_voltage_dc($range,$resolution);

Preset and make a dc voltage measurement with the specified range and resolution.

$range

Range is given in terms of volts and can be [0.1|1|10|100|1000|MIN|MAX|DEF]. DEF is default.

$resolution

Resolution is given in terms of $range or [MIN|MAX|DEF]. $resolution=0.0001 means 4½ digits for example. The best resolution is 100nV: $range=0.1;$resolution=0.000001.

read_voltage_ac

$datum=$hp->read_voltage_ac($range,$resolution);

Preset and make an ac voltage measurement with the specified range and resolution. For ac measurements, resolution is actually fixed at 6½ digits. The resolution parameter only affects the front-panel display.

read_current_dc

$datum=$hp->read_current_dc($range,$resolution);

Preset and make a dc current measurement with the specified range and resolution.

read_current_ac

$datum=$hp->read_current_ac($range,$resolution);

Preset and make an ac current measurement with the specified range and resolution. For ac measurements, resolution is actually fixed at 6½ digits. The resolution parameter only affects the front-panel display.

display_on

$hp->display_on();

Turn the front-panel display on.

display_off

$hp->display_off();

Turn the front-panel display off.

display_text

$hp->display_text($text);
print $hp->display_text();

Display a message on the front panel. The multimeter will display up to 12 characters in a message; any additional characters are truncated. Without parameter the displayed message is returned.

display_clear

$hp->display_clear();

Clear the message displayed on the front panel.

beep

$hp->beep();

Issue a single beep immediately.

get_error

($err_num,$err_msg)=$hp->get_error();

Query the multimeter's error queue. Up to 20 errors can be stored in the queue. Errors are retrieved in first-in-first out (FIFO) order.

reset

$hp->reset();

Reset the multimeter to its power-on configuration.

CAVEATS/BUGS

probably many

SEE ALSO

Lab::Instrument

The HP34401A uses the Lab::Instrument class (Lab::Instrument).

AUTHOR/COPYRIGHT

This is $Id: HP34401A.pm 85 2005-11-10 23:35:43Z schroeer $

Copyright 2004 Daniel Schröer (http://www.danielschroeer.de)

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

cpanm Lab::Instrument

perl -MCPAN -e shell
install Lab::Instrument