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SmartReader Data Logger
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current channels have a low 100 ohm impedance). This helps to minimize the voltage
requirements and power consumption of the circuit. Check the specifications for the
transducers you intend to use to ensure the SmartReader 7's input impedances are
acceptable.
Two-Wire Transmitters
Two-wire transmitters are transducers that form part of a current loop circuit. They vary the
current flow in accordance with changes in the variable which they are sensing. Most two-wire
transmitters have a 4-20mA output.
Three-Wire Transducers
Three-wire transducers have three connections: a supply (excitation) voltage input (V+IN), an
output voltage (V+OUT) and a common (COM-). You can usually tell if a transducer is 3-wire
by reviewing the wiring diagram and looking for a single common connection.
Four-Wire Transducers
Four-wire transducers fall into two categories: line-type and Wheatstone bridge types. No
more than one line-type transducer can be attached to a SmartReader 7 unless it has an
isolated output (no electrical connection to the line). Bridge-type transducers can only be
hooked to a SmartReader 7 if they are signal conditioned.
Output
The specified output of a transducer or transmitter will determine whether it is compatible for
use with your SmartReader 7. Some of the most popular transducer outputs (such as 0 to
2.5V or 0 to 5V DC) are directly compatible with the logger. The most popular transmitter
output is 4 to 20 mA which can be easily used with the SmartReader 7.
1.9.7 Specifications
Voltage and Current Inputs
Standard Ranges: 0 to 2.5 volts DC (1 channel)
0 to 5 volts DC (2 channels)
0 to 10 volts DC (1 channel)
0 to 200mV DC (1 channel)
0 to 25mA (2 channels)
Accuracy: ±1% F.S.
Input Impedance: >1 M ohms (0 to 200 mV channel)
>1 M ohms (0 to 2.5 V channel)
20 k ohms (0 to 5.0 V channels)
40.9 k ohms (0 to 10.0 V channel)
100 ohms (0 to 25 mA channels)
Maximum Input Voltage: Voltage channels: ±40 V
(reverse polarity protected)
Current channels: ±70 mA
(reverse polarity protected)
- IMPORTANT! 1
- SmartReader Data Loggers 2
- TRADEMARK NOTICES 3
- LIMITED WARRANTY 4
- Table of Contents 5
- 1.1.1 Features 9
- 1.1.2 Description 10
- 1.1.3 Programmed Operation 10
- 1.1.5 How to Use SmartReaders 11
- 1.1.6 Specifications 13
- 1.1.7 Approvals 14
- SmartReader Software Driver 15
- 1.2.1 Logger Status 16
- 1.2.2 Logger Channels 18
- 1.2.2.2 Channel Calibration 20
- 1.3.1 Description 21
- 1.3.2 Setup 21
- Other Applications 22
- 1.4.1 Description 23
- 1.4.2 Setup 23
- 1.4.3 Accessories 24
- 1.4.4 Troubleshooting 25
- 1.4.6 Specifications 26
- 1.5.1 Description 28
- 1.5.2 Setup and Use 29
- A60FL / A65FL 29
- A70FL / A75FL 30
- 1.5.4 Specifications 31
- 1.5.5 Troubleshooting 31
- 1.6.1 Description 32
- 1.6.2 Setup 33
- 1.6.3 Pressure Calibration 34
- 1.6.4 Specifications 35
- 1.7.1 Description 37
- 1.7.2 Setup and Use 37
- 1.7.3 Specifications 38
- 1.7.4 Calibration 39
- 1.8.1 Description 41
- 1.8.2 Setup and Use 41
- 1.8.3 Specifications 42
- 1.8.4 Calibration 43
- 1.9.1 Description 45
- 1.9.2 Setup 45
- 1.9.3 Choosing Input Channels 48
- R = 200 / Iin 52
- 1.9.7 Specifications 59
- 1.9.8 Applications 60
- 1.10.1 Description 62
- 1.10.2 Setup and Use 62
- SmartReader 9 Pulse Logger 64
- 1.11.3 Quick-Start Tutorial 65
- 1.11.7 Specifications 69
- 1.12.1 Description 70
- 1.12.2 Setup 70
- 1.12.3 Accessories 71
- 1.12.4 Troubleshooting 72
- 1.12.6 Specifications 73
- Monitoring Resistance 75
- Temperature and 77
- Relative Humidity 77
- Calibration 77
- L" reading 79
- H" reading 79
- L - 170 x bH) / 428 79
- H - bL) - 1) 79
- L - 145 x bH) / 296 81
- Thermistor Temperature 82
- 1.15.4 Setup and Use 83
- 1.15.5 Specifications 84
- SmartReader Data Logger 89
- 1.15.7 Custom Probes 92
- 1.15.10 Probe Assemblies 95
- Sample Rates 97
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