Installing external NTC (temperature sensing) resistor - BMU801

BMU801 Quick Guide
Product status
Document code
M212977EN
Revision
B
ft:locale
en-US
Product
BMU801
Document type
User guide

If you have 2 batteries in your system, Vaisala recommends that you install an NTC resistor for each battery.

  1. There are 2 ferruled wires on the other end of the NTC resistor. Connect the wires to the temperature resistor connector located between the 2 battery connectors in the BMU801 front panel.
    1
    Upper 2 pins for battery 1 (Batt 1)
    2
    Lower 2 pins for battery 2 (Batt 2)
  2. The other end of the NTC resistor has a cable lug. Attach it to the negative ( − ) terminal in the battery. For an example, see the following figure.
    1
    Screw
    2
    Spring washer
    3
    Flat washer
    4
    NTC temperature resistor
    5
    Connector
    6
    Battery
    Another possible location for attaching the NTC resistor to the battery is the side of the battery. You can use cable ties for attaching. Make sure that the resistor has good physical contact with the battery.