4.7 ZERO MODE
The DO7PLUS uses a four wire internal zero measurement. The current terminals are
internally shorted together and the first measurement made. The potential terminals will
measure any emf in the circuit and this value is stored. A second measurement is then
performed with the current and potential leads connected in the normal way. The stored emf
is deducted from this measurement and the resulting value displayed. This measurement
mode eliminates errors due to emf flowing in the circuit.
x
In single trigger mode the DO7PLUS will perform a zero measurement for each
measurement triggered.
x
In continuous measurement mode one zero measurement is made followed by
continuous normal measurements until the measurement is stopped. If the
measurement is restarted, then another zero measurement is made followed by
continuous measurements.
If a range change is made, either manually or by the auto range function, or a measurement
error occurs, then a new zero measurement will be performed.
4.8
Short cut keys enable quick access to menus
Short cut Key
Function Menu
ALT + T
=
TRIGGER
ALT + L
=
LIMITS
ALT + F
=
FILTER
ALT + S
=
SETTLING
ALT + D
=
DATA LOG
ALT + C
=
TEMPERATURE COMPENSATION
ALT + G
=
GRAPHICS
ALT + M
=
MEMORIES
4.9
F3 MENU OPTIONS EXPLAINED
4.9.1
RANGE:
See Range selection 4.5
4.9.2
CURRENT:
See Current selection section 4.6
INSTRUMENT MENU
EXIT
6K
CURRENT
AVERAGE
TRIGGER
SING/AUTO
LIMITS
OFF
DATA LOG
ON
TEMP COMP
OFF
FILTER
ON
SETTLING
OFF
CABLE MODE
OFF
MEMORIES
OFF
RANGE
Operating Instructions
Digital Microhmmeter Type DO7 PLUS
20
