Rent or Hire Electrical Power Data Loggers

Rent or Hire Electrical Power Data Loggers

Posted by Michael Hampson on 14th Oct 2015

Need to rent, hire or buy power data loggers for an energy recording job? Then talk to Lontek as we specialise in renting three phase power data loggers. When you hire a power logger from Lontek, you can be confident that someone at the end of the phone can actually assist you.


Complete power logger kit

Record the true power! Measure volts, amps and power factor to get true kW data and not some guesstimate from current only units.

Power Logging applications:

  • Load profile
    • Are the three phases balanced?
    • Need to record the maximum demand?
    • Can we add any new machinery or do we need to upgrade the electrical switchboard, sub-mains, mains or transformer?
  • Energy efficiency assessments – Cary out before and after energy assessments to give you or your customers a minute by minute snapshot of the typical energy usage over a one to two week period or longer. Prove that new equipment is saving you or your customers money!
  • Take instantaneous samples of Total Harmonics Distortion or THD on the system.

Hire a complete kit:

  • Hire a power logger that comes with all the leads and cable combinations you will need on site.
  • Ensure the unit has current sensors that will suit your application, not a one size fits all approach.
  • Make sure you can FREELY load any software to download the data to your PC.


Data Logger tips:

  • Compact size. With modern electronics, all power data loggers should be compact. Ideally you want the unit to sit safely inside the electrical switchboard.
  • Line powered. This is a must!! Forget looking for a power point in most electrical switch rooms.
  • Can the unit accept a range of current sensors for physical space reasons and current range purposes.
  • Don’t just check the maximum amps. Also consider the minimum amps and whether the current sensor can cover the low end too. Many current sensors are fine at the top end, but drop out at the low end 10-20% of range or their accuracy is poor.
  • Good accuracy. Better than 1% for most applications. No point looking for a 7% improvement with a ±5% power logger.
  • Flexible recording options. Every second, every minute, every hour? Min, Max, Ave? Do you just want total kW or individual V, A, PF, kW, kVA, kVAR?
  • Easy to use software. And you must be able to EXPORT the data to CSV for Excel or other third party software applications.

Site considerations:

  • What is the minimum and maximum load current for the job?
  • What size is the cable or bus-bar diameter?
    • Watch out for double or triple cables groups. You can measure just one cable and then calculate the total load. Odds are the cables won’t be balanced, so check all cables to get the calculation right. Or just go for flexible current sensors in this case.
  • How much space is there in the switchboard? Will the logger and current sensors fit?
  • How long does the test need to run? One to four weeks seems typical.
  • How often does the power logger need to record data?
    • A one minute sampling rate is great for most typical applications. But air compressors and the like can switch loads(mechanically) on and off fairly quickly and they often need a faster recording rate. Some data loggers only take spot readings and this can be a problem. Go for a power logger that samples at say every second, but can record the average, minimum and maximum every minute or longer.
  • Does the site Export energy?
    • Some sites will Export energy back to the grid or may involve a generator. Make sure your power logger can record the Export data too.
  • What’s the Power Factor like on site?
    • Can your power logger record leading and lagging Power Factor?


More reading

If you really want to know more. Dent Instruments have put together a Metering Project eBook as a guide for “Power Meter Installation from Start to Finish”.

Save time and money:

Prices start at A$300 + GST per week plus freight.

Rent a power logger from an Electrician that knows how to use the unit!

Contact Lontek on 02 4739 8400 or via our contact us page.

The above information is only a sales guide for selecting electrical power data loggers for either purchase or rental purposes. Only licensed Electricians in your State are permitted to access electrical switchboards. If in doubt, contact a Licensed Electrician.