Intab PC-Logger 2100 Bedienungsanleitung
PC-Logger 2100
user’s manual
© INTAB Interface-Teknik AB
September 2004
CONTENTS
1 OVERVIEW...............................................................................................1
1.1 On-line and Off-line recordings..........................................................2
1.2 Memory Capacity during On-line and Off-line recordings.................2
1.3 Functional Block Diagram..................................................................3
1.4 Display and Keys ................................................................................4
1.5 Power Requirements...........................................................................5
2 ANALOGUE INPUTS / RANGES...........................................................6
2.1 Ranges.................................................................................................6
2.2 Temperature measurements - T/C's.....................................................7
2.2.1 Ranges and linearization.........................................................7
2.2.2 Cold Junction Compensation..................................................8
2.3 Temperature measurements - Pt100 sensors.......................................8
3 CONNECTIONS........................................................................................9
3.1 Power Supply......................................................................................9
3.2 Computer.............................................................................................9
3.3 Connecting Sensors and Transducers................................................10
3.3.1 Differential Inputs.................................................................11
3.3.2 Common Mode.....................................................................12
3.4 Examples...........................................................................................13
3.4.1 Thermocouples T/C ..............................................................13
3.4.2 20mA Current Loops ............................................................14
3.4.3 Voltage output transducers : .................................................16
3.4.4. RTD (Pt100) sensors.............................................................17
3.5 Common errors when connecting transducers..................................18
4 DIGITAL PORTS - COUNTERS.........................................................19
4.1 Counters............................................................................................19
4.1.1 Reset mode............................................................................19
4.1.2 Accumulating mode..............................................................19
4.2 Digital Inputs.....................................................................................20
4.3 Digital Output ...................................................................................20
5 CONNECT DIGITAL PORTS...............................................................21
5.1 Switch / Relay on Digital Input.........................................................22
5.2 TTL/CMOS signal on digital input...................................................22
5.3 External relay on digital output.........................................................23
5.4 Status Led on digital output ..............................................................23
6 MISCELLANEOUS ................................................................................23
6.1 Reset of the PC-logger 2100.............................................................23
6.2 Controller Program ...........................................................................23
6.3 50/60Hz Adaption.............................................................................23
7 TECHNICAL DATA / SPECIFICATIONS..........................................23
7.1 ANALOGUE DATA ........................................................................23
7.1.1 Method of measurement .......................................................23
7.1.2 Measurement interval ...........................................................23
7.1.3 Inputs ....................................................................................23
7.1.4 Ranges...................................................................................23
7.1.5 Divisions/Dynamic ranges....................................................23
7.1.6 Resolution .............................................................................23
7.1.7 Accuracy................................................................................23
7.1.8 Temperature Coefficient .......................................................23
7.1.9 Noise .....................................................................................23
7.1.10 Common mode......................................................................23
7.1.11 Constant Current Output .......................................................23
7.2 DIGITAL PORTS - COUNTERS .....................................................23
7.2.1 Digital Output........................................................................23
7.2.2 Pulse Inputs and Digital Inputs (at 25°C +/-10°C)...............23
7.2.3 Auxiliary voltage output : V-Out ..........................................23
7.3 INTERNAL DATA STORAGE CAPACITY...................................23
7.4 COMPUTER INTERFACE ..............................................................23
7.5 POWER REQUIREMENTS .............................................................23
7.5.1 Built-In NiCd-accumulators..................................................23
7.5.2 Mains Adapter.......................................................................23
7.6 MECHANICAL.................................................................................23
8 Questions and Answers............................................................................23
INDEX...................................................................................................................23
Page 1
1 OVERVIEW
1 OVERVIEW
A "PC-logger 2100" together with our software and a personal computer running
Windows
, constitutes a versatile and powerful data acquisition/recording
system.
PC-logger 2100 is a complete logger useful for many purposes. It will, for
example, easily replace/outdate any strip chart recorder.
The logger measures the full range of industrial analogue signals: +/-10V, +/-1V
and +/-20mA. It is also possible to directly connect thermocouples for
temperature measurements. Cold Junction compensation and linearization are
internally handled by the logger. It is also possible to measure temperature by
means of RTD's (e.g. Pt100 sensors).
In addition to the analogue inputs the logger is equipped with 3 counter inputs.
These can be used for event (pulse) counting, e.g. flow, rpm, etc.
Recordings can be made directly to the storage media on the host computer
(On-line recordings) or temporarily to the internal memory in the logger.
(Off-line recordings) During Off-line recordings there is no need for the host
computer to be connected to the logger. This way the computer can be used for
other purposes during off-line recordings.
Main features
-8 analogue inputs.
-Range and measurement type are user configurable through software.
(10V, 1V, 100mV, 50mV, 20mA, Thermocouple type: J, K, R, S, T, E,...)
-16 bit resolution AD converter.
-3 counter inputs. (plus 3 digital inputs and one Alarm Output.)
-Constant current source suitable for Pt100 measurements.
-On-line recording directly to computer.
-Off-line recordings using internal memory of 224KB.
-Voltage output for transducers etc.
-Display and keys for easy handling.
-Fully compatible with Intab's "EasyView Pro"
-Small dimensions: 250 x 110 x 40mm.
To fully understand the potential of the PC-logger 2100 we strongly recommend
the studying of this entire manual with emphasis on chapter 3 which describes
how to connect sensors and transducers.
How the PC-logger is handled using our software and a PC is explained in the
program manual and by the program itself through its user-friendly and self-
explanatory menus.
Those users who intend to write their own software to collect data are
recommended to obtain the "Command Manual" that describes available
commands and their syntax.
Page 2 INTAB Interface-Teknik AB, Sweden
1.1 On-line and Off-line recordings
PC-logger 2100 can make recordings in two different ways: On-line and
Off-line.
An On-line measurement is performed with the computer connected to the
logger during the entire recording. Measured data are continuously transferred
from the logger to the computer and stored on disk.
During the recording it is also possible to analyse/evaluate the measurements in
real-time on the computer screen. You can also analyse previously acquired
recordings while the current recording is taken care of in the background.
An Off-line recording should be initiated by transferring measurement
parameters from the computer to the logger. These parameters tell the logger
how to perform its recording and contain information about: interval, active
channels, channel configuration, etc. (See also software manual.) All parameters
are valid until a new set is transferred.
The PC-logger can then, after the parameters have been transferred, be
disconnected from the computer. The recording is started using the keys on the
logger itself. During the recording, the data is stored in the logger's internal
memory which has a capacity of appr. 110.000 values.
When the recording is completed the logger is again connected to the computer
for transferral of collected data to disk.
1.2 Memory Capacity during On-line and Off-line recordings
Every stored sample occupies 2 bytes of memory.
When making On-line measurements, it is the amount of free space on the
computer's disk (floppy disk or hard disk) that limits the length of the recording.
For an Off-line recording the limiting factor is the internal memory capacity of
the logger. This memory of 224k Bytes can hold 112 000 values.
The parameters that affect the maximum recording length (or duration) are:
Sampling Interval, Reduction Factor (Averaged Value), Number of channels
used and of course if it is an On-line or Off-line recording.
When using Intab's software, the user is always informed of how long the
recording can last while entering the various parameters.
Example: Off-line-recording.
The PC-logger can sample on 8 channels, 10 times each hour during 2 months.
(0,1 x 224.000) / (2 x 8) = 1400 hours! (58 days)
Please note that the PC-logger only can handle one recording at a time. If an
Off-line recording is started before the previous Off-line recording was
transferred to disk, the first one will be lost!
Page 3
1 OVERVIEW
1.3 Functional Block Diagram
The illustration above shows a simplified diagram of the building blocks of the
2100-logger. In addition to what is shown, there is separate power input and an
auxiliary voltage output for supplying sensors.
Note that the control program of the 2100 resides in RAM. This makes it a
simple operation to modify or update the logger by simply downloading a new
program from the computer: BOOT. (See also chapter 6)
Page 4 INTAB Interface-Teknik AB, Sweden
1.4 Display and Keys
An LCD and adjacent keys are incorporated to make it possible to handle the
unit when disconnected from computer.
They are used to start and stop recordings and to check sensor signals and
wiring.
Select one of three main functions using up/down arrows.
"MULTIMETER" is used to check correctness of sensor signals. Scroll
between channels with up and down arrows. The upper line of the display shows
sensor output voltage or current. The bottom line shows the (linearly)
transformed value with the engineering unit you have assigned to it. (See also "x-
form" in the software manual.)
"RECORD" should be selected to stop or start recordings. Remember that a start
erases the previous recording, so don't forget to transfer it first.
The display has a built in lamp. Turn it on and off with the lamp key. To
conserve power it will automatically be turned off after about 15 seconds.
Note that "RECORD" will also contain the information "Recording on" if a
recording is in progress.
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