NAME

Lab::Instrument::HP34401A - HP/Agilent 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

The Lab::Instrument::HP34401A class implements an interface to the 34401A digital multimeter by Agilent (formerly HP). This module can also be used to address the newer 34410A and 34411A multimeters, but doesn't include new functions. Use the Lab::Instrument::HP34411A class for full functionality.

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 4 1/2 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 6 1/2 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 6 1/2 digits. The resolution parameter only affects the front-panel display.

read_resistance

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

Preset and measure resistance with specified range and resolution.

config_voltage

$inttime=$hp->config_voltage($digits,$range,$count);

Configures device for measurement with specified number of digits (4 to 6), voltage range and number of data points. Afterwards, data can be taken by triggering the multimeter, resulting in faster measurements than using read_voltage_xx. Returns string with integration time resulting from number of digits.

read_with_trigger_voltage_dc

@array = $hp->read_with_trigger_voltage_dc()

Take data points as configured with config_voltage(). returns an array.

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.

scroll_message

$hp->scroll_message($message);

Scrolls the message $message on the display of the HP.

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.

id

$id=$hp->id();

Returns the instruments ID string.

CAVEATS/BUGS

probably many

SEE ALSO

Lab::Instrument

AUTHOR/COPYRIGHT

This is $Id: HP34401A.pm 613 2010-04-14 20:40:41Z schroeer $

Copyright 2004-2006 Daniel Schröer (http://www.danielschroeer.de/), 2009-2010 Daniela Taubert

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