What to do if Velleman DVM439 Thermometer displays ‘Er2’?
If your Velleman Thermometer displays ‘Er2’, it means the device has been exposed to rapid changes in ambient temperature. To resolve this, allow the device to reach the ambient temperature for at least 30 minutes.
What to do if Velleman DVM439 Thermometer displays ‘Er3’?
If your Velleman Thermometer displays ‘Er3’, it indicates that the ambient temperature is outside of the 0–50 °C range (32–122 °F). Allow the device to reach the ambient temperature for at least 30 minutes.
How to reset Velleman DVM439 if it shows Er5-9?
If your Velleman Thermometer displays Er5–9, you should reset the device. Here’s how: 1. Wait until the device powers off automatically (about 15 s). 2. Remove the batteries and wait for at least 1 minute. 3. Reinsert the batteries and press the measurement button.
Warnings and guidelines for safe use of the device's laser pointer to prevent eye damage.
How to aim the device, take measurements, and understand display indicators like MAX and Hold mode.
Explanation of 'Hi'/'Lo' error messages and how to interpret them based on measurement range.
Details on 'Er2', 'Er3', 'Er5-9' error displays and the procedure to reset the device.
General| Brand | Velleman |
|---|---|
| Model | DVM439 |
| Category | Thermometer |
| Language | English |
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