EL-USB Data Logger Support

My EL-USB Logger will not connect. How do I check and resolve Battery and Driver issues?

We’ve put together a help guide on battery and driver issues, check it out here.

How do I replace the battery in my logger?

  • EL-USB Range
    Your data logger is provided with a 3.6V 1/2AA battery already installed. You can change the battery by following the instructions below.El USB battery replacement
  • EL-CC-1 / EL-CC-2 / EL-PDF-1 Ranges

These are sealed units and the batteries are not replaceable. If your battery has run out, you will need to buy a replacement product.

  • EL-GFX Range

When replacing the two 3.6V 1/2AA batteries, loosen the two screws located at the base of the unit. Remove the lower portion of the housing to expose the battery bay. Remove the old batteries and place new batteries in position. Replace the lower housing and tighten the screws.

EL GFX battery replacement


With the lid off the logger, remove the screw from the opposite end of the logger. Carefully separate the two moldings and remove the battery from the metal holder. Replace the battery with a BAT 3VX5.

EL USB Lite battery replacement

  • EL-USB-1-PRO

Remove the battery cover using a small coin or something similar and allow the battery to slide out. Replace the battery with a BATT 3V6 2/3AA H TEMP and then screw the battery cover back in. Please note that this is a specialist battery that allows for operation of the logger at high temperature. Using unsuitable batteries may result in fire or explosion at high temperatures.

EL USB pro battery replacement


The EL-USB-ACT is supplied with two AA batteries fitted. To begin use the battery tab must be removed as shown below. When replacing the batteries, simply loosen the screw on the rear of the device and replace with two additional AA batteries.

EL USB act battery replacement

  • EL-USB-1-RCG

The EL-USB-1-RCG features a non-replaceable, rechargeable battery. If you think the battery has gone flat, connect the logger to a PC using a Mini USB cable (CABLE USB A-MF) for up to five hours.

How often should I send my data logger for recalibration?

We recommend recalibration on an annual basis, however your procedures may require something different to this. You can contact us for any information on the calibration services we can offer.

Why aren’t my batteries working?

If left unused for extended periods of time lithium metal batteries, including those used in the EasyLog range of data loggers, naturally form a non-conductive internal layer – a Passivation layer – preventing them from self-discharge and effectively increasing their shelf life. When first installed in the data logger, this may cause a momentary drop in the battery voltage (the Transient Minimum Voltage) as the internal layer is broken down, resulting in the data logger resetting. Inserting the batteries in the data logger and leaving it connected to a PC for about 30 seconds will remove this layer. After this, remove and re-install the batteries to reset the data logger. Overall battery life will not be affected.

How long will the battery last in my data logger?

The battery life depends on the logger you have and the setting, on the datasheet for your product you can see the battery life shown in the specifications table.

Are the USB data loggers waterproof?

All of our data loggers have an IP rating on their datasheets. The IP rating is a two-digit code indicating the level of protection that is provided against solid objects and ingress of water as detailed below:

First Digit – Mechanical Protection

  1. Protected against solid objects over 50mm
  2. Protected against solid objects over 12mm
  3. Protected against solid objects over 2.5mm
  4. Protected against solid objects over 1mm
  5. Protected against harmful dust, limited ingress permitted
  6. Totally protected against dust

Second Digit – Water Ingress Protection

  1. Protected against vertically falling drops of water
  2. Protected against direct sprays of water up to 15° from the vertical
  3. Protected against direct sprays of water up to 60° from the vertical
  4. Protected against water splashed from all directions, limited ingress permitted
  5. Protected against low-pressure jets of water from all directions, limited ingress permitted
  6. Protected against strong jets of water, limited ingress permitted
  7. Protected against immersion up to 1m depth for up to 30 minutes

What do the symbols mean on my USB-LCD datalogger?

  • If you see ‘—‘ on the display of your data logger when you press the button, this indicates that the logger is not logging.
  • ‘PS’ indicates that the data logger is in Push-to-Start mode. Pressing the button will start the data logging session.
  • ‘dS’ indicates that the data logger is in Delayed Start mode. The data logging session will start at the time specified when the logger was set up.

Is there a shelf life to the CO sensor in my EL-USB-CO/EL-USB-CO300?

The sensor life on a EL-USB-CO/CO300 logger is typically 4 years. You can find the exact expiry date in the EasyLog software under Current Status.

How do I check how many readings/samples I have taken on my GFX-D2?

Press the i button on the device and navigate down navigate down to the final page.