++ed by:
AMBA

1 PAUSE user
1 non-PAUSE user.

Andreas K. Hüttel
and 4 contributors

NAME

        Lab::XPRESS::Sweep::Temperature - temperature sweep

.

SYNOPSIS

        use Lab::XPRESS::hub;
        my $hub = new Lab::XPRESS::hub();
        
        
        my $tsensor = $hub->Instrument('ITC', 
                {
                connection_type => 'VISA_RS232',
                gpib_address => 2
                });
        
        my $sweep_temperature = $hub->Sweep('Temperature',
                {
                instrument => $tsensor,
                points => [90,4],
                mode => 'list'
                });

.

DESCRIPTION

Parent: Lab::XPRESS::Sweep::Sweep

The Lab::XPRESS::Sweep::Temperature class implements a module for temperature sweeps in the Lab::XPRESS::Sweep framework.

.

CONSTRUCTOR

        my $sweep_temperature = $hub->Sweep('Temperature',
                {
                instrument => $tsensor,
                points => [90,4],
                mode => 'list'
                });

Instantiates a new temperature sweep

.

PARAMETERS

instrument [Lab::Instrument] (mandatory)

Instrument, conducting the sweep. Must be of type Lab:Instrument. Supported instruments: Lab::Instrument::ITC

.

mode [string] (default = 'continuous' | 'step' | 'list')

continuous: perform a continuous temperature sweep. After the starting temperature has been stabalized by the temperature controller, the heater will be switched off in order to cool down to the final value. Measurements will be performed constantly at the time-interval defined in interval.

step: measurements will be performed at discrete values between start and end points defined in parameter points, seperated by a step defined in parameter stepwidth

list: measurements will be performed at a list of values defined in parameter points

.

points [float array] (mandatory)

array of values (in deg) that defines the characteristic points of the sweep. First value is appraoched before measurement begins.

Case mode => 'continuous' : List of exactly 2 values, that define start and end point of the sweep. The starting point has to be higher value than the endpont. points => [180, 4] # Start: 180 K / Stop: 4 K

Case mode => 'step' : Same as in 'continuous' but the temperature controller will stabalize the temperature at the defined setpoints. A measurement is performed, when the motor is idle.

Case mode => 'list' : Array of values, with minimum length 1, that are approached in sequence to perform a measurment.

.

stepwidth [float array]

This parameter is relevant only if mode = 'step' has been selected. Stepwidth has to be an array of length '1' or greater. The values define the width for each step within the corresponding sweep sequence. If the length of the defined sweep sequence devided by the stepwidth is not an integer number, the last step will be smaller in order to reach the defined points-value.

        points = [0, 90, 180]
        stepwidth = [10, 25]
        
        ==> steps: 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 115, 140, 165, 180

.

number_of_points [int array]

can be used instead of 'stepwidth'. Attention: Use only the 'number_of_points' or the 'stepwidth' parameter. Using both will cause an Error! This parameter is relevant only if mode = 'step' has been selected. Number_of_points has to be an array of length '1' or greater. The values defines the number of steps within the corresponding sweep sequence.

        points = [0, 90, 180]
        number_of_points = [5, 2]
        
        ==> steps: 0, 18, 36, 54, 72, 90, 135, 180

.

interval [float] (default = 1)

interval in seconds for taking measurement points. Only relevant in mode 'continuous'.

.

id [string] (default = 'Temperature_sweep')

Just an ID.

.

filename_extention [string] (default = 'T=')

Defines a postfix, that will be appended to the filenames if necessary.

.

delay_before_loop [int] (default = 0)

defines the time in seconds to wait after the starting point has been reached.

.

delay_in_loop [int] (default = 0)

This parameter is relevant only if mode = 'step' or 'list' has been selected. Defines the time in seconds to wait after the value for the next step has been reached.

.

delay_after_loop [int] (default = 0)

Defines the time in seconds to wait after the sweep has been finished. This delay will be executed before an optional backsweep or optional repetitions of the sweep.

getter_args

Setting getter_args = [@args]>, the get_value method will be called as

 $instrument->get_value(@args);

setter_args

Setting setter_args = [@args]>, the set_T method will be called as

 $instrument->set_T($setpoint, @args);

CAVEATS/BUGS

probably none

.

SEE ALSO

Lab::XPRESS::Sweep

.

AUTHOR/COPYRIGHT

Christian Butschkow and Stefan Geißler

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

.