Why does the local display of my Endress+Hauser Proline Promag W 800 remain dark?
- JJaime JohnsonAug 31, 2025
If the local display of your Endress+Hauser Measuring Instruments remains dark after touching it for longer than 5 seconds, it could be due to several reasons: * The supply voltage does not match the value indicated on the nameplate. Apply the correct supply voltage. * The polarity of the supply voltage is wrong. Correct the polarity. * The connecting cables are not connected correctly. Check the cable connection and correct if necessary. * No battery pack or buffer capacitor is inserted or connected. Insert or connect the battery pack or buffer capacitor. * The device is not powered from the mains. Touch the display for 5 seconds.