Automatic Lcz; Discharging Test; Memory; Interface - ADInstruments AD2817C Operation Manual

AD2817C Operation Manual
2-wire measurement mode has less accuracy than 4-wire measurement mode.

2.3.5 Automatic LCZ

The instrument automatically selects L, C, Z and equivalent mode according to impedance
characteristics of the device under test, to automatically recogonize unkown and mixing
components.
At AUTO mode, primary and secondary parameters are selected according to impedance
angle:
Impedance angle
θ>5
θ<-5
others
Equivalent mode is selected according to impedance:
Impedance
Z>1k
Z<1k
Keep the original parameter at similar status of short circuit or open circuit. If primary and
secondary parameters are modified, automatic LCZ function will be cancelled.

2.3.6 Discharging test

The instrument is operated with external bias, and generally external bias source has DC
isolated circuit. When discharging function is turned on, the instrument will perform
low-impedance discharge on sampling path to reduce the effect on test accuracy and
speed caused by charge on isolated capacitance. Low impedance lasts for 10 to 20ms.

2.3.7 Memory

The instrument's measurement parameter, such as frequency and level, measurement
setups, comparator's limit data can be stored in nonvolatile storage in the form of files.
When they're needed, they can be loaded directly from file menu to save time. And the
latest saved and loaded file will be automatically loaded when the instrument is turned on
next time.

2.3.8 Interface

IEEE488 interface:
z
having different linker. Communication command is in the format of SCPI and all
commands and data on BUS are sent in ASCII code. The interface supports automatic
FETCH, and has the functions of SH1, AH1, T5, L4, RL1, DC1, DT1, C0, and E1. It has
the compatibility of IEEE488.1 and IEEE488.2.
Primary and secondary parameters
o
o
also called GPIB interface and equal to IEC625 interface, but
12
L-Q
C-D
Z-θ
Equivalent mode
parallel
series