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JR-1000/1001 Data Loggers

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Copyright © 2010 ACR Systems Inc.  All Rights Reserved.

1.2.1.2

Logger Memory

The Memory subsection indicates how the data is stored in memory and what the start and

end times (or capacity) are for the data logging.  In the FIFO (First In, First Out) mode, the

logger continually stores data and when the memory limit is reached, the new readings start to

overwrite the oldest readings.  In this method, the logger is always collecting data, but only

saves the most recent data in its memory.  In the Stop When Full mode, when the memory

limit is reached, the logger stops recording.

The length of time for data capture of the logger is determined by the number of active

channels and the sampling rate.  To find out more about how the capacity is affected by the

sample rate and active channels, see 

Appendix A  Sample Rates

.

To set how the logger stores its data, click on the Usage field and select FIFO or Stop When

Full.  

To set the compression method click on the Compression field and select ON.  A run length

compression method is used.  Run length compression stores the reading plus the number of

consecutive times the same reading was measured.  This means that the logger will store 2

values to memory, the data value and a counter value.  If the reading were 22°C for 3 sample

periods then the logger would store 22°C and the count of 3.  Once the reading changes a

new compression session begins.  The compression session will last to a maximum of 15

consecutive readings that are the same.  If the 16th reading is still the same a new session will

start.

Note that when the compression is set to ON the Start Time will display as NA in the Status

window. If you want to see that Start Time do a Backup of the logger, the Start Time will be

displayed in the Statistics tab of the graph

Summary of Contents for JR-1000

Page 1: ...Copyright 2010 ACR Systems Inc All Rights Reserved Reference Guide IMPORTANT JR Data Loggers Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com...

Page 2: ...e author make no claim to these trademarks For more information regarding trademarks see the Trademark Notices section of this manual ACR Systems Inc assumes no responsibility for errors or omissions...

Page 3: ...TrendReader is a Registered Trademark of ACR Systems Inc TRADEMARK NOTICES...

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Page 5: ...s Take Readings 3 How to Use JR Loggers 5 Specifications 6 Product Approvals 7 2 JR 1000 1001 Software Driver 8 Logger Status 8 Logger Sampling 9 Logger Memory 10 Logger Channels 10 Channel Informatio...

Page 6: ...frequently refers to TrendReader Standard conventions and procedures To get the most from your logger please take time to familiarize yourself with TrendReader Standard and its Reference Guide For im...

Page 7: ...oggers features make them a useful tool for data collection Pocket sized Solid state components no moving parts Low power microprocessor controlled circuitry 8 bit high resolution readings Precision o...

Page 8: ...ry using one of two sampling methods 1 First in First out FIFO In this method the logger continues to take readings when its memory is full to make room it discards the oldest reading every time it ad...

Page 9: ...puter s serial port or via a serial cable Set Sample Rate Always confirm the sample rate how often the logger saves readings to make sure it will be acceptable for your application You can alter the f...

Page 10: ...nditions you can protect your logger simply by placing it in a zip lock plastic bag When you place your JR 1000 1001 logger in a cold environment make sure condensation will not settle on the logger w...

Page 11: ...full Fill then stop Sample Intervals User selectable rates from every 8 seconds to 34 minutes Sampling Mode 1 Average over sample interval except for 8 second interval 2 Spot Resolution 8 bit 1 part i...

Page 12: ...rd EN61326 1977 A1 1998 European Emissions and Immunity covering Radiated Electromagnetic Field ESD and RFI Meets FCC standard 47 CFR Part 15 Subpart B 1999 Class B US Radiated and Conducted Emissions...

Page 13: ...ntains information about sampling memory and logger description The channel of the logger contains information about the channel type temperature equation and Realtime value and calibration associated...

Page 14: ...which a logger stores readings to memory The Sampling subsection indicates what the sample rate is In normal sampling the rates available are from once every 8 seconds to once every 34 minutes To set...

Page 15: ...channels see Appendix A Sample Rates To set how the logger stores its data click on the Usage field and select FIFO or Stop When Full To set the compression method click on the Compression field and...

Page 16: ...will default to the closest time sampling within 8 seconds of the selected time 1 2 2 Logger Channels The Channels section indicates provides information specific to the channel The channel on the lo...

Page 17: ...urther information To set the equation click on the Equation field and select the equation from the drop down list To help you select the proper equation the Realtime value using the currently selecte...

Page 18: ...ger in order to make the output more accurate To set each calibration value click on the appropriate calibration field and enter the value The factory equations for the JR 1000 1001 use the Low Mid an...

Page 19: ...ded plug the logger into the serial port of your computer and begin downloading and viewing the logged data 1 3 2 Setup Once the logger is connected to your computer select the communications port in...

Page 20: ...o heat or humidity sources people equipment moisture solar gain etc can contribute to a wide variance in conditions even within a small confined area The individual sensor associated with your JR 1000...

Page 21: ...its memory Otherwise if the sampling mode is set to Spot the logger still takes readings every 8 seconds but only stores the reading taken at the selected interval 1 4 2 Sample Rate Tables The followi...

Page 22: ...0 6 1 4 0 56 sec 0 10 13 52 0 2 min 0 22 16 0 0 4 min 56 sec 0 55 21 52 0 10 min 0 113 8 0 0 20 min 0 226 16 0 0 30 min 1 88 8 0 0 Table B 3 JR 1000 1001 Sample Rate Table with Compression 5 times Sam...

Page 23: ...001 Data Loggers 17 Copyright 2010 ACR Systems Inc All Rights Reserved 32 sec 0 12 2 8 0 56 sec 0 21 3 44 0 2 min 0 45 8 0 0 4 min 56 sec 0 111 19 44 0 10 min 0 226 16 0 0 20 min 1 88 8 0 0 30 min 1 3...

Page 24: ...provals 6 Channel Calibration 12 Channel Information 10 Channels 10 Data Logger 1 Description 1 Features 1 How to Use 3 Introductions 1 Logger 1 Memory 9 Operation 2 Readings 2 Sampling 7 8 Setup 7 So...

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