CZ800: Connection and acquisition parameters

Open connection settings on the acquisition page, refresh the serial-port list, select the actual card's port and click Connect. Wait for a successful connection before configuring or acquiring. Connection status reports communication with hardware; an equipment record in Equipment Management is a different object.

If no port appears, check the cable, power, driver and operating-system recognition, then refresh. If connection fails, check for the wrong port or another application's use of it, and read the software error. The recorded port-list implementation filters some Bluetooth ports, so the number of ports shown by the operating system alone does not establish whether scanning is correct.

Before disconnecting, stop the current task and allow cleanup to finish. Do not repeatedly click Connect, Configure or Start while a task is starting, running or stopping.

The hardware acquisition modes are Free and Synchronous; they determine how samples are organized. The task modes are Single, Continuous and Timed; they determine how many segments are acquired or how long the task continues. Synchronous does not mean continuous.

Free acquisition organizes a segment by sample rate and sample count. Synchronous acquisition also sets samples per cycle and number of cycles. Actual synchronization depends on the hardware and a valid speed signal. Selecting Synchronous, or receiving a complete waveform, does not by itself demonstrate reliable keyphasor or phase data.

Parameter	Purpose	Recorded options and constraints
Sample rate	Samples per second; affects the time scale and analyzable frequency range	5120, 10240, 20480 or 40960 Hz
Sample count	Samples saved in one segment; affects duration and frequency resolution	Free mode: 1024, 4096, 8192, 16384 or 32768
Samples per cycle	Sampling density within each synchronous cycle	128, 256, 512 or 1024
Cycle count	Number of synchronous cycles	16, 32 or 64; samples per cycle multiplied by cycle count must not exceed 32768
Sensor type	Tells the card how to handle the sensor signal	Acceleration, velocity or displacement; downstream algorithms have separate limitations
Sensitivity	Conversion coefficient from the electrical signal to physical units	Enter the actual sensor value; it must be positive
IEPE supply	Sensor-related power configuration	Associated with the acceleration option; follow actual wiring and sensor requirements

The recorded form shares sensor type and sensitivity between CH1 and CH2. It does not provide independent sensitivity settings for the two channels. Sensitivity-unit hints and most analysis paths are based on acceleration. Selecting velocity or displacement does not establish support in every derived analysis.

For uniformly sampled time data with N samples and sample rate fs, segment duration is approximately N/fs seconds and FFT frequency spacing is approximately fs/N Hz. For example, 4096 samples at 5120 Hz represent about 0.8 seconds with approximately 1.25 Hz spacing.

This is a parameter illustration, not a field-setting recommendation. Actual synchronous-acquisition duration also depends on speed and card behavior.

Increasing the sample rate while keeping N fixed shortens the segment and increases frequency spacing. Increasing N adds data and acquisition time. The theoretical Nyquist frequency is fs/2; the usable band is additionally limited by the sensor, card and filters.

In the ordinary acquisition workspace, the configuration for the current task is checked and sent before acquisition starts. Saving the synchronous-parameter dialog confirms the form combination; it does not mean the hardware has received it.

Defaults in Settings are starting values for later forms. They do not alter stored historical records. If Start fails, distinguish a connection error, rejected configuration and acquisition-start error. Values remaining visible in the form do not prove that hardware configuration succeeded.

The card may return 0 RPM when there is no valid speed input. This alone does not disable a complete waveform or ordinary spectrum. Each feature that depends on rotational frequency, a keyphasor or valid speed must still meet its own prerequisites.

Field balancing requires valid measured speed in the record to extract 1X amplitude. Do not substitute the equipment record's rated speed for the captured measurement's actual speed. See field balancing for its full measurement-source requirements.