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AMBA

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1 non-PAUSE user.

Andreas K. Hüttel
and 3 contributors

NAME

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

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SYNOPSIS

        use Lab::Instrument::Agilent34410A;
        my $hp=new Lab::Instrument::Agilent34410A(0,22);
        print $agilent->get_value();

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DESCRIPTION

The Lab::Instrument::Agilent34410A class implements an interface to the 34410A and 34411A digital multimeters by Agilent (formerly HP). Note that the module Lab::Instrument::Agilent34410A still works for those older multimeter models.

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CONSTRUCTOR

        my $hp=new(\%options);

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METHODS

get_value

        old style:
        $value=$agilent->get_value(<$function>,<$range>,<$integration>);
        
        new style:
        $value=$agilent->get_value({
                'function' => <$function>,
                'range' => <$range>,
                'integration' => {
                        'mode' => <int_mode>,
                        'value' => <int_value>
                        }
                });

Request a measurement value. If optinal paramters are defined, some device paramters can be preset before the request for a measurement value is sent to the device.

<$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)
<$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.

<$integration>

INTEGRATION controlles the integration mode and the integration time. It is composed of two parts:

        1.) Integration mode:
                
                'tc='    -->  Integration-Time- or Aperture-MODE
                'nplc='  -->  Number of Power Line Cycles MODE
                'res='   -->  Resolution-MODE
                

If no Integration mode is given, the 'Number of Power Line Cycles MODE' will be selected as default.

        2.) Integration Time:
                
                Floating point number or MIN, MAX, DEF. 

For detailed information about the valid range for the integration time see set_tc, set_resolution, set_nplc

Examples:

        a) $integration = 'tc=0.2'
                -->  Integration mode = Integration-Time- or Aperture-MODE
                -->  Integration Time = 0.2 seconds
                
        b) $integration = 'nplc=5'
                -->  Integration mode = Number of Power Line Cycles MODE
                -->  Integration Time = 5 Powerline cycles = 5 * 1/50 Hz = 0.1 seconds
                
        c) $integration = 'res=0.00001'
                -->  Integration mode = Resolution-MODE
                -->  Integration Time = will be choosen automaticly to guarantee the requested resolution
        
        d) $integration = '1'
                -->  Integration mode = Number of Power Line Cycles MODE
                -->  Integration Time = 1 Powerline cycles = 1 * 1/50 Hz = 0.02 seconds

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get_T

        old style:
        $value=$agilent->get_value($sensor);
        
        new style:
        $value=$agilent->get_value({
                'sensor' => $sensor
                });

Make a measurement defined by $function with the previously specified range and integration time.

$sensor
        SENSOR  can be one of the Temperature-Diodes defined in Lab::Instrument::TemperatureDiodes.

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.

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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.

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abort

        $agilent->abort();

Aborts current (triggered) measurement.

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wait

        $agilent->wait();

WAIT until triggered measurement has been finished.

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active

        $agilent->active();

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

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get_data

        old style:
        @data = $agilent->get_data(<$readings>);
        
        new style:
        @data = $agilent->get_data({
                'readings' => <$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.

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set_function

        old style:
        $agilent->set_function($function);
        
        new style:
        $agilent->set_function({
                'function' => $function
                });

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

$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)

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set_range

        old style:
        $agilent->set_range($function,$range);
        
        new style:
        $agilent->set_range({
                'function' => $function,
                'range' => $range
                });

Set a new value for the predefined RANGE for the measurement function $function of the Agilent34410A.

$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)
$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.

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set_nplc

        old style:
        $agilent->set_nplc($function,$nplc);
        
        new style:
        $agilent->set_nplc({
                'function' => $function,
                'nplc' => $nplc
                });

Set a new value for the predefined NUMBER of POWER LINE CYCLES for the measurement function $function of the Agilent34410A.

$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)
$nplc

Preset the NUMBER of POWER LINE CYCLES which 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

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set_resolution

        old style:
        $agilent->set_resolution($function,$resolution);
        
        new style:
        $agilent->set_resolution({
                'function' => $function,
                'resolution' => $resolution
                });

Set a new value for the predefined RESOLUTION for the measurement function $function of the Agilent34410A nanovoltmeter.

$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)
$resolution

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.

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set_tc

        old style:
        $agilent->set_tc($function,$tc);

        new style:
        $agilent->set_tc({
                'function' => $function,
                'tc' => $tc
                });

Set a new value for the predefined INTEGRATION TIME for the measurement function $function of the Agilent34410A.

$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)
$tc

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

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set_bw

        old style:
        $agilent->set_bw($function,$bw);

        new style:
        $agilent->set_bw({
                'function' => $function,
                'bandwidth' => $bw
                });

Set a new value for the predefined BANDWIDTH for the measurement function $function of the Agilent34410A. This function can only be used for the functions VOLTAGE:AC and CURRENT:AC.

$function

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

        "current:ac" --> AC current measurement
        "voltage:ac" --> AC voltage measurement
$bw

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

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display_on

        $agilent->display_on();

Turn the front-panel display on.

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display_off

        $agilent->display_off();

Turn the front-panel display off.

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display_text

        old style:
        $agilent->display_text($text);
        
        new style:
        $agilent->display_text({
                'display_text' => $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.

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display_clear

        $agilent->display_clear();

Clear the message displayed on the front panel.

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beep

        $agilent->beep();

Issue a single beep immediately.

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get_error

        ($err_num,$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.

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reset

        $agilent->reset();

Reset the multimeter to its power-on configuration.

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id

        $id=$agilent->id();

Returns the instruments ID string.

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CAVEATS/BUGS

probably many

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SEE ALSO

Lab::Instrument

set_tc

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AUTHOR/COPYRIGHT

Stefan Geissler

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