A10 Analogue Logger

Data is stored on a removable memory card (included), enabling remote data logging without the need for direct connection to a PC. After logging, the memory card can be simply inserted in a card reader to view and analyse the data on a PC; no special software is required.

Each data record can be date and time-stamped when it is stored. A new file is generated for each day’s data. The default file format is .CSV; other file extensions may be specified.

Data is stored as ASCII text with each record on a new line with comma separated fields. The available fields are: record prefix text, time & date, channel 1 reading, channel 1 units text, channel 2 reading, channel 2 units text, switch state.

Analogue values can be linearly scaled to convert to the units of the parameter being measured. Readings are sampled at 75 Hz and averaged over 1 sec.

In addition to the two analogue channels, the status of a switch input and data received on the logger’s RS232 input can be recorded. A comprehensive range of conditions for logging may be specified, which can be conditional on the analogue inputs, switch status or RS232 data.

RS232 data can be output and loggers daisy chained to increase the number of channels.

Customised versions and quantity discounts are available; please contact our sales team for a quote.

Logging Measured Values in Actual Units, Rather Than mA
The SpaceLogger A10 may be set to output a data string with measured values in any required units. The user may specify the units to appear in the logged data record with command UNITS1="degrees," for example.

It is necessary to set up the scaling factors to achieve readings in the required units over the measurement range from the measured current in mA.

Typical Applications

• Scientific research
• Education
• Industrial automation
• Plant and machinery monitoring
• Quality control
• Security monitoring
• Environmental monitoring

Features

• 2GB Memory Card (included)
• Two 4 to 20 mA inputs, 10 bit resolution—allows logging from numerous sensors
• Data sampled and time-stamped, then stored in daily files
• Simple to configure for wide range of applications via setup file written to SD card
• Option to record status of a switch and RS232 data
• Conditional logging
• Alarm output signal
• Can be daily chained to increase the number of channels
• Can be used to convert 4-20 mA to RS232 (with or without a memory card installed)
• SD card for high-capacity data storage in easily removable and transferable format
• Compact, economical and robust design
• Low power consumption
• File format. CSV enables stored data to be read & analysed with standard PC software

 

Features

SD Card Data Capacity
A typical string of data for each sample logged by the SpaceLogger A10 would be as follows:
Prefix, Date, Time, Channel 1, Units for Channel 1, Channel 2, Units for Channel 2, Switch State<CR><LF>

Where:

Prefix:	text set by user – may be up to 10 characters long
Date:	format is DD/MM/YYYY (10 characters)
Time:	format is hh:mm:ss (8 characters)
Channel 1:	recorded value could be up to 16 characters max, including decimal point
Units 1:	text set by user – may be up to 10 characters long
Channel 2:	recorded value could be up to 16 characters max, including decimal point
Units 2:	text set by user – may be up to 10 characters long
Switch Sate:	logged as 0 or 1 (1 character)
<CR><LF>:	end of line is 2 characters

 

Therefore, max number of characters in one sample is 90, i.e. 90 bytes (including the comma delimiters).

Therefore, the maximum number of characters in one sample is 90, i.e., 90 bytes (including the comma delimiters).

If logging a sample once per second, for one month this would be approximately 250 MB of data in total.

The following table gives the approximate capacity of the SD card, depending on the logging interval selected and the actual size of the data sample recorded:

	SpaceLogger A10 Data capacity by sample size and logging rate
Memory Card Size	90bytes @ 1 per sec	90bytes @ 1 per 5 sec	45bytes @ 1 per sec	45bytes @ 1 per 5 sec
2 GB	8 months	>3 years	16 months	>6 years

 

Examples of SpaceLogger A10 Applications

Please read the Technical Note—A10 Application Examples for worked examples on using the SpaceLogger A10 in the following applications:

• Recording the level of water in a tank using an ultrasonic ranger
• Recording GPS data and two analogue channels
• Analogue to RS232 converter
• Push button-triggered reading
• Logging the supply voltage
• Extending the number of analogue channels

Specification

Physical	Enclosure dimensions	Width: 67 mm Depth: 67 mm Height: 28 mm (excluding optional rubber feet)
	Weight	75g
	Enclosure material	GP ABS (UL94-HB) plastic and acrylic
Connections	Type	Screwless terminals capable of accepting wire 0.32 to 0.65mm diameter (AWG 28 to 22)
Analogue Input	Number of Channels	2
	Range	4 to 20 mA (0 to 23 mA maximum)
	Sampling	Readings are sampled at 75 Hz and averaged over 1 sec
	Maximum logging rate	1 Hz
	Input impedance	177 ohms
	Accuracy	±1% or 0.1 mA at 20 °C over range 4 to 20 mA
	Drift with temperature	100 ppm / °C over range -40 °C to +40 °C
	Analogue to digital converter	10-bit resolution
Switch Input	Digital channel	Input for logging control switch
	Max input voltage	Must not exceed 3V
	Current out	7μA max
RS232 Input	Number of channels	1
	Transmission standard	RS232 compatible, 8 bits and no parity
	Transmission speed	9600 Baud (default) or selectable from 115200, 57600, 38400, 19200, 4800, 2400, 1200, 300 or 110 Baud
	Data sample	Records only the data between specified start (STX) and end (ETX) characters
RS232 Output	Transmission standard	RS232 compatible, 8 bits and no parity
	Transmission speed	9600 Baud (default) or selectable from 115200, 57600, 38400, 19200, 4800, 2400, 1200, 300 or 110 Baud
	Output rate	Normal Mode: 1 data record per 1 to 60 seconds – selectable Single sample Mode: single data record output in response to event defined by command TRIGGER Slave Mode: rate determined by input of RS232 data sample defined by STX and ETX
Alarm Output	Min output voltage	VOH=1.7V Typ @ 1mA output current
Data Storage	Data storage card	Removable SD, MMC or MMC mobile card
	Data capacity	2 GByte (max)
	File system	FAT16 or FAT32 with 8.3 file names Sector size 512 Bytes
	Data logging interval	Normal Mode: 1 data record per 1 to 60 seconds – selectable Single sample Mode: single data record logged in response to event defined by command TRIGGER with time delay defined by command DELAY Slave Mode: rate determined by input of RS232 data sample defined by STX and ETX
Audible / Visual Indicators	LED indicators	Green: Ready to record data Red: Power on, Writing data to SD card
	Audio bleeper	Two tone signal on correct card insertion Single tone when data purge button depressed Four bleeps per minute when time and date not set
Real Time Clock	Accuracy	±40 ppm at 25°C
	Backup battery	CR2032
Power	Power requirement	7 to 30 V DC
	Current at 12 VDC	10 mA typical
	Supply input protection	Polarity reversal protected and internal resettable 140 mA fuse
	Connection options (both included)	1.3 mm centre pin DC connector, or Screwless terminals (0.32 to 0.64 mm diameter, AWG 28 to 22 conductors)
Environmental	Temperature range	Operating: -25°C to +70°C [or dependent on card conditions] Storage: -40°C to +70°C
	Enclosure protection	IP203
	EMC	EMC Directive 89/336/EEC – CE marked (Emissions: EN61326:1997 inc A1/A2/A3:2003, EN60945:1997 Immunity: EN61326:1997) FCC/CFR 47: Part 15:2004

 

The manufacturer reserves the right to amend the specification and therefore the information in this document may be subject to change.

Documentation

User Manual & Data Sheet

• User Manual
• Data Sheet
• Technical Note