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Andreas K. Hüttel
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NAME

Lab::Instrument::Agilent34410A -- HP/Agilent/Keysight 34410A or 34411A digital multimeter

SYNOPSIS

 use Lab::Instrument::Agilent34410A;
 my $multimeter = Lab::Instrument::Agilent34410A->new(%options);

 print $multimeter->get_value();

DESCRIPTION

The Lab::Instrument::Agilent34410A class implements an interface to the 34410A and 34411A digital multimeters by Agilent (now Keysight, formerly HP).

METHODS

new(%options)

This method is described in Lab::Measurement::Tutorial and Lab::Instrument.

get_value()

Perform data aquisition.

 my $value = $multimeter->get_value();

get_error()

 my ($err_num, $err_msg) = $agilent->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()

 $agilent->reset();

Reset the multimeter to its power-on configuration.

assert_function($keyword)

Throw if the instrument is not in one of the operating modes given in $keyword. See Lab::SCPI for the keyword syntax.

set_function($function)

Set a new value for the measurement function of the Agilent34410A.

$function can be one of the measurement methods of the Agilent34410A.

        "current:dc" --> DC current measurement 
        "current:ac" --> AC current measurement 
        "voltage:dc" --> DC voltage measurement 
        "voltage:ac" --> AC voltage measurement 
        "resistance" --> resistance measurement (2-wire)
        "fresistance" --> resistance measurement (4-wire)

get_function()

Return the used measurement function.

set_range($range)

Set the range of the used measurement function to $range.

RANGE is given in terms of amps, volts or ohms and can be -3...+3A | MIN | MAX | DEF | AUTO, 100mV...1000V | MIN | MAX | DEF | AUTO or 0...1e9 | MIN | MAX | DEF | AUTO. DEF is default AUTO activates the AUTORANGE-mode. DEF will be set, if no value is given.

get_range()

Return the range of the used measurement function.

get_autorange()

Return non-zero, if autoranging is enabled.

set_nplc($nplc)

Set a new value for the predefined NUMBER of POWER LINE CYCLES for the used measurement function.

The NUMBER of POWER LINE CYCLES is actually something similar to an integration time for recording a single measurement value. The values for $nplc can be any value between 0.006 ... 100 but internally the Agilent34410A selects the value closest to one of the following fixed values 0.006 | 0.02 | 0.06 | 0.2 | 1 | 2 | 10 | 100 | MIN | MAX | DEF .

Example: Assuming $nplc to be 10 and assuming a netfrequency of 50Hz this results in an integration time of 10*50Hz = 0.2 seconds for each measured value.

NOTE: 1.) Only those integration times set to an integral number of power line cycles (1, 2, 10, or 100 PLCs) provide normal mode (line frequency noise) rejection. 2.) Setting the integration time also sets the resolution for the measurement. The following table shows the relationship between integration time and resolution.

        Integration Time (power line cycles)             Resolution
        0.001 PLC  (34411A only)                        30 ppm x Range
        0.002 PLC  (34411A only)                        15 ppm x Range
        0.006 PLC                                       6.0 ppm x Range
        0.02 PLC                                        3.0 ppm x Range
        0.06 PLC                                        1.5 ppm x Range
        0.2 PLC                                         0.7 ppm x Range
        1 PLC (default)                                 0.3 ppm x Range
        2 PLC                                           0.2 ppm x Range
        10 PLC                                          0.1 ppm x Range
        100 PLC                                         0.03 ppm x Range

get_nplc()

Return the value of nplc for the used measurement function.

set_resolution($resolution)

Set a new resolution for the used measurement function.

Give the current value RANGE of the current range, $resolution is given in terms of $resolution * RANGE or [MIN|MAX|DEF]. $resolution=0.0001 means 4 1/2 digits for example. $resolution must be larger than 0.3e-6xRANGE. The best resolution is range = 100mV ==> resoltuion = 3e-8V DEF will be set, if no value is given.

get_resolution()

Return the resolution of the used measurement function.

set_tc($tc)

Set a new value for the predefined INTEGRATION TIME for the used measurement function.

INTEGRATION TIME $tc can be 1e-4 ... 1s | MIN | MAX | DEF.

NOTE: 1.) Only those integration times set to an integral number of power line cycles (1, 2, 10, or 100 PLCs) provide normal mode (line frequency noise) rejection. 2.) Setting the integration time also sets the resolution for the measurement. The following table shows the relationship between integration time and resolution.

        Integration Time (power line cycles)             Resolution
        0.001 PLC  (34411A only)                        30 ppm x Range
        0.002 PLC  (34411A only)                        15 ppm x Range
        0.006 PLC                                       6.0 ppm x Range
        0.02 PLC                                        3.0 ppm x Range
        0.06 PLC                                        1.5 ppm x Range
        0.2 PLC                                         0.7 ppm x Range
        1 PLC (default)                                 0.3 ppm x Range
        2 PLC                                           0.2 ppm x Range
        10 PLC                                          0.1 ppm x Range
        100 PLC                                         0.03 ppm x Range

get_tc()

Return the INTEGRATION TIME of the used measurement function.

set_bw($bw)

Set a new BANDWIDTH for the used measurement function, which must be VOLTAGE:AC or CURRENT:AC.

$bw can be 3 ... 200Hz | MIN | MAX | DEF.

get_bw()

Return the bandwidth of the used measurement function, which must be VOLTAGE:AC or CURRENT:AC.

config_measurement

        old style:
        $agilent->config_measurement($function, $number_of_points, <$time>, <$range>);
        
        new style:
        $agilent->config_measurement({
                'function' => $function, 
                'nop' => $number_of_points,
                'time' => <$time>, 
                'range' => <$range>
                });

Preset the Agilent34410A for a TRIGGERED measurement.

$function

FUNCTION can be one of the measurement methods of the Agilent34410A.

        "current:dc" --> DC current measurement 
        "current:ac" --> AC current measurement 
        "voltage:dc" --> DC voltage measurement 
        "voltage:ac" --> AC voltage measurement 
        "resistance" --> resistance measurement (2-wire)
        "fresistance" --> resistance measurement (4-wire)
$number_of_points

Preset the NUMBER OF POINTS to be taken for one measurement trace. The single measured points will be stored in the internal memory of the Agilent34410A. For the Agilent34410A the internal memory is limited to 50.000 values.

<$time>

Preset the TIME duration for one full trace. From TIME the integration time value for each measurement point will be derived [TC = (TIME *50Hz)/NOP]. Expected values are between 0.0001*NOP ... 1*NOP seconds.

<$range>

RANGE is given in terms of amps, volts or ohms and can be -3...+3A | MIN | MAX | DEF | AUTO , 100mV...1000V | MIN | MAX | DEF | AUTO or 0...1e9 | MIN | MAX | DEF | AUTO . DEF is default AUTO activates the AUTORANGE-mode. DEF will be set, if no value is given.

trg()

 $agilent->trg();

Sends a trigger signal via the GPIB-BUS to start the predefined measurement. The LabVisa-script can immediatally be continued, e.g. to start another triggered measurement using a second Agilent34410A.

get_data($readings)

reads all recorded values from the internal buffer and returnes them as an array of floatingpoint values. reading the buffer will start immediately. The LabVisa-script cannot be continued until all requested readings have been recieved.

<$readings>

readINGS can be a number between 1 and 50.000 or 'ALL' to specifiy the number of values to be read from the buffer. If $readings is not defined, the default value "ALL" will be used.

abort()

Aborts current (triggered) measurement.

wait()

Wait until triggered measurement has been finished.

active()

Returns '1' if the current triggered measurement is still active and '0' if the current triggered measurement has allready been finished.

display_text($text)

Display $text 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_on()

Turn the front-panel display on.

display_off()

Turn the front-panel display off.

display_off

        $agilent->display_off();

Turn the front-panel display off.

display_clear()

Clear the message displayed on the front panel.

beep()

Issue a single beep immediately.

SEE ALSO

Lab::Instrument

AUTHOR/COPYRIGHT

Stefan Geissler