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RS232 Mini AD and Controller---- MiniAD-11-12 (Item No. #A01)

It is a board-based low speed general-purpose data acquisition and control system that can be embedded into any customised systems.

It features 11 analogue inputs (12-bit resolution, 0 to 2.5V input range ) and 4 digital output lines. It has a 3-wire RS232 port through which the hos PC can talk with the module to read analogue voltages and to change statues of outputs.

It accepts three commands sent by the host system:
(1) to read 11 analogue voltages in ASCII format,
(2) to read analogue voltages in binary format, 
(3) to set logic status of 4 digital outputs.

Datasheets
MiniAD-11-12
RS232 interface
11 analogue inputs
12 bit A/D ( 2.5V range)
4 digital outputs

Price
 Item Name: MiniAD-11-12
 Item Number: #A01
 Price: £31.00

RS232 32-channel 16-bit A/D ---- AD-32-16 (Item No. #A02)

 It is a board-based low speed general-purpose data acquisition and control system that can be embedded into any customised systems.

It features 32 analogue inputs with 16-bit resolution (input range: 0 to 2.5V). It has a 3-wire RS232 port through which the host PC can talk with the module to read analogue voltages.

The device is a free-running device. After switched on, the device updates 32 voltages automatically through its RS232 port at 10Hz. The data format is ASCII data format.

Datasheets
AD-32-16
RS232 interface
32 analogue inputs
16 bit A/D ( 2.5V range)
Price
 Item Name: AD-32-16
 Item Number: #A02
 Price: £66.00         

Parallel port Logger/Controller---- MiniLC (Item No. #A03, #A04)

miniLC alone.jpg (44450 bytes)
 

minilc.jpg (8002 bytes)

 Termination board (A04) provides screw terminals for easily connecting wires to external circuits or sensors.

MiniLC I/O driver routines
 The I/O drivers supplied with the system support the following programming language: DOS Turbo Pascal 6, 32-bit Windows. There are only two main DLLs associated with the MiniLC. Users can easily call these DLLs in their own programs or from any spreadsheet packages (MS Excel for example). Some examples are given in the user's manual.

MiniLC software
 Dos version:    MiniLCd
Win version:  MiniLCw

 

The MiniLC has 12 bit 8 channel data acquisition system with 8 digital outputs. It simultaneously turns your computer into a data logger / chart recorder and a controller.  The MiniLC is controlled by two I/O DLLs.

The DLLs can be called into user's VB, VC or Dephi programs under Win 95/98/Me operation systems. However by using software such as ALLOWIO, they can be used in Win NT/2000/XP. ALLOWIO can be downloaded from www.beyondlogic.org.

MiniLC Specifications

  • Plugged into parallel port of a PC

  • A 20-way ribbon cable connection to external circuits

  • 8 analogue inputs,  0 - 2.5V, maximum range:  -0.3V to 4V

  • Resolution: 12 bit (0.61 mV resolution)

  • Maximum impedance of input source: 10 kOhm

  • Overall measurement error <+/- 1.2 mV (after software calibration and appropriate averaging)

  • Maximum conversion rate: 5kHz for Pentium 233 above

  • 8 digital output channel

  • Logic 0 = 0 to 0.8V, Logic 1 = 2.4V above

  • Each line sources 0.4 mA and sinks 8 mA

  • Maximum Data update rate: 60 kHz for Pentium 233 above

  • Supply voltage DC 4.0 - 5.0 V

Specification of termination board

  • 20-way DIL connector for ribbon cable connection to the MiniLC

  • Screw terminal blocks for analogue inputs and digital outputs

  • Screw terminal blocks for power supply output (directly from battery or external power supply)

  • A battery holder for a 9V PP3 battery

  • A 2.1 mm power socket for an external 5.3-12V DC supply

  • Power ON/OFF switch and a connector for external power switch

  • Power-on indicator and a voltage LOW indicator set at 4.3V.

  • On-board voltage regulator, +5V +/- 2%, 250 mA with short-circuit protection

MiniLC Windows 95/98 program - MiniLCw

The MINILCw is versatile and powerful Windows 95/98 application software to drive the MiniLC. It provides a system test, data logging and control functions. The first function checks the functionality of the device. The data logging function allows a variety of data logging modes to be selected. The control function allows a feed-back control system to be implemented. The MiniLCw software package contains the following functions:

  • Communications: Select an LPT port to be used or specify the base address of an LPT port

  • System check Functionality check of analogue inputs and digital outputs. It also allows a software calibration to be conducted for voltage measurement of the A/D converter. The calibration factor is saved into a file for future use until the next calibration

  • Data logging setting Configure analogue input channels. Each channel requires a name, a unit and three parameters for a conversion equation: y = a + b v + c v v, in which v is in Volts. User can also specify a number for averaging voltage measurements (default: 30). A bigger number results in a better measurement accuracy. However it will slow down the data logging rate.

  • Output Configuration Configure digital output channels. CH2 to CH8 can have manual or alarm mode. Ch1 can have manual or external power control mode. In the external power control mode, this output line goes high during any data logging events.

  • Scanning mode Select continuous or intermittent scan mode. Maximum scan rate: 15 sample/second. The scan rate is a nominal value. The actual scan rate may be slightly different from the specified value. In the data file, however, the exact time at which a measurement is taken is shown together with the data.

  • Start Select a logging start method: manual start, time-delayed or triggered start modes. During a data logging session, logged data are displayed on the screen. Time traces of selected analogue inputs can be also displayed on the screen.

  • Time trace View time traces during data logging

  • View After a logging session, view text or traces of analogue channels

  • Help View help (including hardware, software and DLLs, together with figures)

  • Quit

Datasheets
Price
 Item Name: MiniLC
 Item Number: #A03
 Price: £32.00                                           
 Item Name: MiniLC terminal board
 Item Number: #A04
 Price: £28.00