User manual

USB DrDAQ User's Guide 13
Copyright © 2011 Pico Technology Ltd. All rights reserved. usbdrdaq.en
3.4
Specifications and connections
3.4.1
General specifications
Number of channels
14
Maximum sampling rate
100 kHz streaming, 1 MHz block mode
Input overvoltage protection
30 V
Digital output voltage
3.3 V
Digital output impedance
2.2 kΩ
Output connector
USB 2.0
3.4.2
Input, output and sensor specifications
Channel
Signal Type
Range
Resolution
Accuracy
Sound waveform
Input
±100
±0.2
Not calibrated
Sound level
Input
55 to 100 dBA
1 dBA
5 dBA
Temperature
Input
-10 to 70°C
0.1°C @25°C
2°C @25°C
Light
Input
0 to 100
0.1
Not calibrated
RGB LED
Output
16.7 million colour
8 bit x 3
N/A
pH sensor
Redox/ORP
(Oxidation/
Reduction)
Input
0 to 14 pH
±2000mV @10
12
Ω
0.02 pH
±1.2 mV
Sensor
calibration
dependent.
Resistance
Input
0 to 1 MΩ
250 Ω @10K
5%
Scope (voltage)
Input
± 1.25 V
± 2.5 V
± 5 V
± 10 V
with 100 kHz
bandwidth
8 bit
3%
Digital 1
I/O
2.2 kΩ @ 3.3 V out, 5 V
in
N/A
N/A
Digital 2
I/O
2.2 kΩ @ 3.3 V out, 5 V
in
N/A
N/A
Digital 3
I/O
2.2 kΩ @ 3.3 V out, 5 V
in
N/A
N/A
Digital 4
I/O
2.2 kΩ @ 3.3 V out, 5 V
in
N/A
N/A
External 1
Input
0 to 2.5 V
1 mV
1%
External 2
Input
As Ext. 1
As Ext. 1
As Ext. 1
External 3
Input
As Ext. 1
As Ext. 1
As Ext. 1
Signal generator
Output
DAC
0 - 20 kHz
0 - 1.5 V Amplitude.
±1.5 V offset.
DC-100 kHz
running up to
2MSP/s
2 mV
10 mV