AN-2000 COMPUTERIZED ANEMOMETRY SYSTEM
The Intelligence behind the Solution
The combination of advanced silicon technology with experience, provides research and industry with the best in fluid measurement instrumentation. This system allows accurate and automatic measurement of any type of fluid flow in gases and liquids using Hot-Wire- or Hot-Film probes.
Unlike other anemometers, the AN-2000 uses a custom integrated, built-in menu system to help automate otherwise tedious procedures, such as bridge-balance, resistance measurement and frequency compensation. The integration of advanced software with a high quality measurement system makes the AN-2000 a complete solution for all your fluid measurement requirements.
The cable resistance is measured automatically by connecting a shorting probe. Values may also be entered manually for probes which cannot be disassembled. Cable resistance ranges from 0.1 to 15 ohms.
PROBE RESISTANCE DISPLAY:
The probe's resistance is automatically measured for both 1:1 and 1:10 bridges. Net resistance (without cable) is calculated within 0.01 Ohms accuracy and the probe resistance values are displayed for inspection. By pressing REPEAT, the user may re-enter or re-measure values.
Overheat Ratios for each channel (or a single ratio for all channels) are entered. The values are stored in a non-volatile memory. The CHECK function runs a logical check of all values and will notify the user of any errors.
Upon successful completion of measurements and analysis, the following values are displayed for each channel: cable and probe resistance values, total resistance, and Overheat Ratio.
Top of Bridge (T.O.B) voltages for all channels are measured after probes have been operated.
A pulse is transmitted to the bridge and the pulse response of the selected channel is displayed on the screen. The time base, offset, and amplitude can be varied and the response can be measured precisely with the use of the cursor keys. The channels damping factor can be adjusted while the pulse response is displayed.
GAIN & DC OFFSET:
Any number of channels can be selected for calibration of gain and DC offset. Gain & Offset can be configured manually or calculated automatically according to your A/D range.
At any time during measurement, a Fourth Order Butterworth filter can be applied to the probe signal. Any combination of low and high-pass filtering can be selected from a range of filter frequencies.All filters, in all channels are
Automatically calibrated to provide the same Cutoff frequency and delay.
A built-in digital oscilloscope permits real-time observation of any channel and includes functions for freezing and measuring signal waveforms.
The measured probe signal can be processed in real time using a transform polynomial, producing immediate readings of fluid velocity and temperature.
The polynomial is unique for each channel and can be either defined manually, calculated from data points using Least Square Fit, or downloaded from the host computer.
By sending a calibrated Sine Wave to any selected channel, the bridge response can be plotted on the graphic screen using a Lin / Log scale.
AUTOMATIC PULSE RESPONSE:
The pulse response of the operated channels can be adjusted automatically within 10 seconds per channel.
Immediate visual context-sensitive help is available at the touch of a button at any time from any menu screen.