If your questions does not appear in this FAQ (Frequently asked questions) please consider specifications listed on page 2 of each product brochure, help documents at the bottom of each page, help menu built into Temprecord software, or contact us for more information.


My logger won't start with the button

On first use you will need to  set up the parameters of the logger in the TRW Software so that it can be started by the button on the logger. You can determine whether the logger can be started and/or stopped with the button in the Program/Parameters form. If you want to be able to start the logger with the button, check the option marked ‘Start with Button’. If you want to be able to stop the logger with the button, check the option marked ‘Stop with Button’.

The button on the logger is used for both starting and stopping the logger, and also for recording markers in the sample record. See the topics using the button on the logger to mark an event and using the button on the logger to start and stop logging for more information.

The software is not recognising my logger when I put it in the Temprecord reader interface

This error is reported when the Temprecord program is unable to communicate with the logger. Of all the problems you might encounter getting Temprecord operational, this is the most likely. The reason for this could be because:

  • you do not have the reader interface plugged in.
  • you have it plugged in to a port different to that specified by the Options/COM Port setting.
  • there is no logger inserted in the reader interface, or the logger is not pushed far enough in.
  • you have inserted the logger the wrong way around. The logger must be inserted into the reader interface with the hole visible and on the left. The logger types with snap-off tabs must be inserted with the tab end visible.
  • the logger is faulty.

You may see other error messages if the logger cannot be accessed.

Why is the Red or Green LED still flashing after the loggers has been stopped?

One thing you may notice now that the logger has been stopped is either the red or green LED is still giving a short flash of light every ten seconds.

If the red LED is flashing every ten seconds this indicates that some or all of the recorded temperature samples in the loggers memory have been outside the range of the defined upper and lower temperature limits you set in the logger. You can change the upper and lower temperature limits using the parameters dialog box in Temprecord software.

See the picture below and look just above the enables box to see upper and lower limit settings.

If the green LED is flashing every ten seconds this indicates that all of the recorded temperature samples in the loggers memory have stayed within range that is below the upper and above the lower preset temperature limits.

To stop the LEDs flashing you first save your data then put the logger through the re-use function using Temprecord software. What this does is clears the memory of all data except serial number and general configuration information then resets the logger for starting so more temperature recording can be carried out with your Multi-use logger.

I want to compare multiple loggers - how do I do this with your software?

No more need for complex spreadsheets! MLV (Multi Logger Validation) software is different to the TRW software and is used to import downloaded data logger file and place them all on one report, with the touch of a button. The purpose is to be able to instantly compare the data. It is very useful for mapping (identifying hot and cold spots) storage areas such as warehouses, rooms, walk in chillers, freezers and incubators, as well as standard fridge, freezer, incubator cabinets, etc.

You will need to download the software for the mapping application from our website at http://temprecord.com/our-software/software-downloads/ and install it logged on as Administrator for it to work. Our customers have provided us with feedback along the lines of this free application being a “great value add”, saving them a lot of time.

Once the normal loggers have been used, the downloaded files can be imported into the MLV software so that all the different graphs appear on one report and compared easily.

Recommendation when using MLV software:
It is recommended to use the “Start on Date” function in the TRW software when programming the loggers being used for mapping. This will ensure the loggers record the same period for comparison. Download as normal and import into MLV software application.

  • User name and Password for MLV Users

User Name: Admin
Password: Admin
We recommend this is subsequently changed and personalised.

  • Basic operation

On the Datafiles tab click Add Files, which will open your browser to find TRW data logger downloaded files, then highlight the desired files for importing. Note that downloaded files should start approx the same time in order for this to work. The best way to do this is to use the “start on date” function when programming the logger for recording in the first place.

When files are selected, select “Landscape” on Printing Options tab for landscape presentation of graph. Just click the “Process Files” button on the right of the screen and a report will be built. Note, there is a help document built into the software, as in the TRW software.

I am getting inconsistencies in the temperature results from inserting probes into products.
The probe must be inserted into the product up to a minimum of 80% in order to get an accurate reading.   If it is not, you can get “stem effect” where the rest of the probe is being exposed to ambient temperatures and is distorting your results.

What is the different between calibration and validation?

  • Calibration provides corrections required to make the logger accurate. Calibration is a comparison with a standard or reference resulting in determined corrections and uncertainties [a characterisation of the instrument] and the results of the calibration may or may not be used to adjust the instrument.


  • Verification is a check against a reference to verify that an instrument meets its manufacturers’ broad and general specifications.


  • Validation provides information on the accuracy (or inaccuracy) of the logger. Validation is a check that an instrument meets the specifications for a specific intended use [what a lab might do internally to determine that an instrument is fit for purpose].