HP 3478A Multimeter

class pymeasure.instruments.hp.HP3478A(adapter, **kwargs)

Bases: pymeasure.instruments.hp.hplegacyinstrument.HPLegacyInstrument

Represents the Hewlett Packard 3478A 5 1/2 digit multimeter and provides a high-level interface for interacting with the instrument.

class ERRORS(value)

Bases: enum.IntFlag

Enum element for errror bit decoding

property SRQ_mask

Return current SRQ mask, this property can be set,

bit assigment for SRQ:

Bit (dec)	Description
1	SRQ when Data ready
4	SRQ when Syntax error
8	SRQ when internal error
16	front panel SQR button
32	SRQ by invalid calibration

property active_connectors

Return selected connectors (“front”/”back”), based on front-panel selector switch

property auto_range_enabled

Property describing the auto-ranging status

Value	Status
True	auto-range function activated
False	manual range selection / auto-range disabled

The range can be set with the range property

property auto_zero_enabled

Return auto-zero status, this property can be set

Value	Status
True	auto-zero active
False	auto-zero disabled

property calibration_enabled

Return calibration enable switch setting, based on front-panel selector switch

Value	Status
True	calbration possible
False	calibration locked

check_errors()

Method to read the error status register

Return error_status

one byte with the error status register content

Rtype error_status

int

display_reset()

Reset the display of the instrument.

property display_text

Displays up to 12 upper-case ASCII characters on the display.

property display_text_no_symbol

Displays up to 12 upper-case ASCII characters on the display and disables all symbols on the display.

property error_status

Checks the error status register

property measure_ACI

Returns the measured value for AC current as a float in A.

property measure_ACV

Returns the measured value for AC Voltage as a float in V.

property measure_DCI

Returns the measured value for DC current as a float in A.

property measure_DCV

Returns the measured value for DC Voltage as a float in V.

property measure_R2W

Returns the measured value for 2-wire resistance as a float in Ohm.

property measure_R4W

Returns the measured value for 4-wire resistance as a float in Ohm.

property measure_Rext

Returns the measured value for extended resistance mode (>30M, 2-wire) resistance as a float in Ohm.

property mode

Return current selected measurement mode, this propery can be set. Allowed values are

Mode	Function
ACI	AC current
ACV	AC voltage
DCI	DC current
DCV	DC voltage
R2W	2-wire resistance
R4W	4-wire resistance
Rext	extended resistance method (requires additional 10 M resistor)

property range

Returns the current measurement range, this property can be set.

Valid values are :

Mode	Range
ACI	0.3, 3, auto
ACV	0.3, 3, 30, 300, auto
DCI	0.3, 3, auto
DCV	0.03, 0.3, 3, 30, 300, auto
R2W	30, 300, 3000, 3E4, 3E5, 3E6, 3E7, auto
R4W	30, 300, 3000, 3E4, 3E5, 3E6, 3E7, auto
Rext	3E7, auto

property resolution

Returns current selected resolution, this property can be set.

Possible values are 3,4 or 5 (for 3 1/2, 4 1/2 or 5 1/2 digits of resolution)

status_desc

alias of pymeasure.instruments.hp.hp3478A.Status

property trigger

Return current selected trigger mode, this property can be set

Possibe values are:

Value	Meaning
auto	automatic trigger (internal)
internal	automatic trigger (internal)
external	external trigger (connector on back or GET)
hold	holds the measurement
fast	fast trigger for AC measurements