Fluke 5790B - Selecting Continuous or External (Single) Trigger; Instructions for Voltage Measurements; Measurement Mode

5790B
Operators Manual
4-20
Selecting Continuous or External (Single) Trigger
When the Product is in continuous trigger mode, the Product is continuously
taking measurements. This is the initial setting at each power-up. As soon as one
measurement is completed, the Product begins a new measurement at the active
input. Select continuous trigger mode by pushing  so that the Ext Trigger
indicator on the display is off.
In the external trigger mode, the Product only takes a measurement when you
push . When  is pushed, the Product begins a new measurement, even if
a partially completed measurement is under way. Select external trigger mode by
pushing  so that the Ext Trigger indicator on the display is on.
When the Digital Filter is active and the Product is in external trigger mode, push
 to start a series of measurements. When the filter is full, the Product stops
sampling the input until  is pushed again, or  is pushed to change to
continuous trigger mode.
Instructions for Voltage Measurements
The Product features two modes for maximum versatility:
• Measurement Mode
The Measurement Mode provides a direct absolute measurement.
• Transfer Mode
The transfer mode significantly increases the specifications of the
measurement by performing an ac/dc transfer.
Read subsequent sections for more information on each mode.
Measurement Mode
In measurement mode, the Product is a precise digital multimeter (DMM) and
measures a voltage applied to the selected input. Depending on trigger mode,
the Product takes single readings when you push  or it takes continuous
readings. See Basic Operation for other operating parameters that you can set
and for information about overrange and underrange readings.
Two examples of measurement mode applications are determining the error of
an ac source and determining the error of an ac voltmeter. No external
calibrators or standards are required during measurement mode operations
unless you are calibrating a voltmeter. When taking a measurement, the display
shows as follows (assuming HI RES is ON or Digital Filter is MEDIUM or SLOW):