The culmination of 30-years of experience designing data acquisition and control systems has resulted in this extremely versatile unit. The Microlink 840 lets you perform a multitude of data acquisition and control tasks, all in one small box. You can use it anywhere on an Ethernet network or over the internet.

The Microlink 840 has 8 hardware inputs, each of which can:

1. Monitor Digital Sensors, including
   • flow meters
2. Monitor Utility Meters, including
   • Electricity meters
   • Gas meters
     
   • Water meters
3. Monitor machines, for instance
   • Record percentage on/off times
   • Count items produced
4. Monitor digital status, for instance
   • Count switch closures
5. Monitor analogue transducers, including
   • pressure
   • temperature
   • force
   • voltage
   • 4-20 mA current

You can also use the Microlink 840 to:

1. Control digital outputs
2. Raise alarms
   • Alarm on analogue level, on-off state or count
   • Set two alarms on a combination of channels
   • Switch a digital output on alarm, sounding a buzzer or turning on a light for example
   • Notify alarms to a remote PC over Ethernet or Internet
   • Insert a delay before an alarm is triggered, helping prevent false alarms

Utility Meter Monitoring

Log data from gas, electricity and water meters and send the consumption readings to a central PC running Windows. The Microlink 840 lets you monitor demand in real-time and identify patterns of use.

• Data files can be read by Excel, Energy Lens, and other software
• Continuous monitoring, logging and display using Windows software.
• See consumption in real-time
• Record total usage and usage over your chosen set intervals, for example each hour's or day's demand
• Alarm indication on all readings - set thresholds above or below which alarms are triggered and logged
• Each Microlink 840 can monitor 8 meters
• Maximum count of over 16 million
• All data is time-stamped
• Choose custom engineering units through software, scaling readings into the required units: kilowatt-hours or cubic meters for example
• Log the counts from the volt-free contacts of your utility meters
• Works with any meter emitting contact closure pulses

For more on utility meter monitoring see the Microlink site.

Counting

The Microlink 840 offers many counting options:

• Accumulating counts
• Frequency measurement
• Period measurement
• Pulse width counter
• Elapsed time counter
• 16-bit or 32-bit counting: 16-bit allows counting up to 65000; 32-bit allows counting to over 16 million.
• Set a scale and offset factor to the count from software. For example if the pulses came from a flow meter which produced one pulse for every 50 millilitres, a scale factor of 0.05 would give a reading in litres.

Logged Data

Data can be saved in text files, xml files, Energy Lens files and to a MySQL database over Ethernet or Internet. You can also automatically e-mail data and reports.

For each channel you can store...

• Maximum value over the logging interval
• Minimum value over the logging interval
• Average value over the logging interval
• Final value of the logging interval
• Custom calculations on saved data

More Information

For more details please get in touch or download the Microlink 840 Data Logger Manual..