Versuch einer Analyse des Kontron UDW5401 Wattmeter zum Zwecke des Abgleichs.
Ohne Schaltplan schwierig.

Trimmer:
    |  V  |  V  |  A  |  A  |  W  |
    | 0V  | 1.5V| 0A  |100mA|     |  
---------------------------------------
    |     |     |I    |     |     |Amperemeter
R92 |     |     |Off- |     |     |Offset
    |     |     |set  |     |     |
---------------------------------------
    |     |     |     |     |P    |Wattmeter
C10 |     |     |     |     |Offs-|Offset
    |     |     |     |     |set  |
---------------------------------------
    |     |     |     |     |     |
R49 |     |     |     |     |     |
    |     |     |     |     |     |
---------------------------------------
    |     |     |     |I    |     |Amperemeter
R96 |     |     |     |Gain |     |Gain
    |     |     |     |     |     |
---------------------------------------
    |U    |     |     |     |     |Voltmeter
R8x |Off- |     |     |     |     |Offset
    |set  |     |     |     |     |
---------------------------------------
    |     |     |     |     |     |
R37 |     |     |     |     |     |
    |     |     |     |     |     |
---------------------------------------
    |     |     |     |     |     |
R52 |     |     |     |     |     |
    |     |     |     |     |     |
---------------------------------------
    |     |U    |     |     |     |Voltmeter
R91 |     |Gain |     |     |     |Gain
    |     |     |     |     |     |
---------------------------------------
    |     |     |     |     |     |
R90 |     |     |     |     |     |
    |     |     |     |     |     |
---------------------------------------
    |     |     |     |     |     |Mittenabgleich
R99 |     |     |     |     |     |Zeigerinstrument
    |     |     |     |     |     |
---------------------------------------
    |     |     |     |     |     |
R100|     |     |     |     |     |
    |     |     |     |     |     |
---------------------------------------
    |     |     |     |     |     |
R101|     |     |     |     |     |
    |     |     |     |     |     |
---------------------------------------





Mäuseklavier Rückseite:


 1   2   3   Volt-Messbereich

off off off  ?
on  off off  ?
off on  off  ?
on  on  off  xxx.x  750V
off off on  1xx.xx 20V
on  off on  1.xxxx 2V
off on  on  1x.xxx 20V
on  on  on  1xx.xx 200mV





Anschluß:

                 rot
     ------------ o ----------
     |            |          |
     |            |          |
  Batterie      Volt-M     Last
     |            |          |          
     |            |          |
     ------ o -A- o -- o -----
          gelb    C    C