1-12
IM 253710-01E
1.3
Acquiring Data (Voltage and Current Signals)
Sampled Data
The instrument samples the voltage and current signals at a given sampling rate
*
and
stores the sampled data in the acquisition memory. The sampled data are processed
and converted to the numerical data of measurement functions and into data used to
display the waveform on the screen. In addition, the sampled data can be saved on a
recording medium as waveform data. The saved waveform data can also be loaded
from the recording medium and displayed on the screen or used to calculate specific
numerical data.
*
The sampling rate indicates the number of data points that are acquired into the acquisition
memory in one second. For example, a sampling rate of 10 kS/s indicates that 10,000 points
of data are acquired in one second. The sampling rate of the instrument is automatically
determined depending on the observation time and the record length (explained later). For
the relationship between the observation time, sampling rate, and record length, see
Appendix 1.
Input module
The input module is equipped with terminals for inputting voltage and current signals. It
is installed into the slot located on the rear side of the main unit (model : 253710). For
the different types, see “Input module” on page iv.
Element and Channel
Element
When an input module is installed in a slot that is located on the rear side of the main
unit, the slot combined with the input module is referred to as an element. The main
unit can contain up to four elements which are numbered from one to four. On power
measurement modules, one voltage and current pair can be input to each element.
Channel
The voltage and current input terminals of each element are assigned channel
numbers as follows.
Element Number
Voltage
Current
1
CH 1
CH 2
2
CH 3
CH 4
3
CH 5
CH 6
4
*
CH 7
CH 8
*
When the motor module is installed, the output voltage from the sensors is assigned to CH7
and CH8. However, motor modules can be used on only products (PZ4000) with firmware
version 2.01 or later.