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AN-2000 COMPUTERIZED ANEMOMETRY SYSTEM

 

Technical Specifications

CTA CHANNEL MODULE

CTA BRIDGE:

Non Linear, Constant Temperature type:
Bridge Ratios

1:10 and 1:1

Sensor Resistance Range:
1:1 Bridge:
1:10 Bridge
Probe Lead Resistance Compensation
Resistance measurement accuracy

0.3-200 Ohm
0.3-20 Ohm
0-4.0 Ohm
▒0.01 Ohm ▒0.05%

Maximum Closed Loop Bandwidth:
1:1 Bridge
1:10 Bridge

DC-120 kHz (up to 500 kHz. with option 04)
DC-120 kHz (up to 550 kHz. with option 04)

Probe current:
x1 drive
x2 drive

300 mA max
*600 mA max
(* Option 02 is required for more than 6 channels simultaneously, up to 1.8A per sensor is available on request).

Equivalent input noise:
1:1 Bridge
1:10 Bridge
With option 01
Typical Hum induced in input

1.6nV/
2.2nV/
400pV/
0.03ÁVrms

Typical Output Noise:
5Ám Tungsten probe, R=3 Ohm, OHR=1.5, U=0
B.W=10kHz
The same, with option 01

135ÁVrms
60ÁVrms

Stability - Typical Input Drift:
1:1 Bridge
1:10 Bridge
With option 01(all bridge ratios)
Probe cable

Output

0.4ÁV/░C
0.3ÁV/░C
0.1ÁV/░C
5m of RG174 or RG58A
Up to 8m of cable with option 04, 20m optional.
Top of bridge buffered



SIGNAL CONDITIONER:

Output Voltage Range
Amplifier Gain (256 discrete settings)
Gain accuracy
DC Offset
Output Impendance
Iutput Impendance
Typical Input White Noise
Frequency Range
Typical Equivalent Input Drift (Gain 1)
▒12V
1 - 99.9 (Other gain values may be ordered).
▒0.2%
+/-10V (in 5mV steps)
100Ohm
10KOhm
30nV /
DC-200 KHz
160ÁV/░C


LOW-PASS FILTER:

4'th order Butterworth Filter with 512 Cut-off frequencies.
100Hz - 120KHz (Other frequency bands can be ordered).
All filters have linear phase and are self calibrated to have the same delay on all channels.


HIGH-PASS FILTER:

2 second order High-Pass filters, swichable on back panel.

Cut-off frequencies 1 Hz, 10 Hz


CCA BRIDGE (OPTION 05):

Constant Current type (in addition to CTA mode)
Bridge current (in 256 equal steps)
Setup accuracy
Temperature drift
0.5 - 50mA
▒0.5%
100ppm/░C


CHANNEL A/D CONVERTER (OPTION 08):

Sampling method
Sampling rate
Clock source
External Trigger
Resolution

Simultaneous S&H
0-93 KHz , 0-160KHz. or 0-500KHz. optional
internal or external
Edge or Level Trigger
14 bit


DIGITAL LINEARIZER (OPTION 09):
This option is available only if option 08 is installed.

Output resolution
Input-Output delay

16 bit
100nSec

Output resolution is higher than Input resolution, in order to prevent errors caused by polynomial calculations.
All polynomial graphs and coefficients are calculated using floating point arithmetics.
All channels have analog "Top Of Bridge" and
"Signal conditioner" outputs on BNC connectors.

CONTROL UNIT
All analog parts are optically isolated from the digital parts and use separate power supplies.

DOT MATRIX DISPLAY:

Resolution
Viewing Area
Dot Size
Backlight Color

256(W) x 128(H) pixels
108(W) x 58(H) mm
0.4 x 0.4 mm
Gray-Blue



A/D CONVERTER
(For frequency response and scope only!)

Sampling Rate
Resolution

15 MHz
8 Bit
All signals displayed are sampled by the control Unit A/D converter.
Acquired data which is sent to the parallel DMA port is sampled by the channel's A/D converter (14 bits).


INTERFACES:

RS-232C serial interface
Baud rates

Standard
1200, 2400, 4800, 9600 and 19200

DMA parallel interface compatible with:
DRV-11 connector
Display bus

Standard
Standard
Analog outputs Top of bridge, buffered, amplified & filtered output
Throughput rate
External clock input
External trigger input
External Sync input (for Ensemble averaging)
Operation voltage
Up to 1.6 MegaWord/Sec(10MW optional)
DC-90KHz,TTL level(DC-160 KHz. or DC-500 KHz. optional)
TTL level
TTL level
230V/115V 50/60Hz switchable.



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A.A. Lab-Systems
Head Office: 33 Hayetzira St., Ramat-Gan 52521, ISRAEL.Tel: 972-3-5756327, Fax: 972-3-5756326
USA office: 9 Blossom drive, Kennett Square, PA19348.  Tel: (302)478-2881 Fax: (610)444-5544


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