User manual
Operation 
akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany · Tel.: +49 (0) 511 16 59 672-0 · www.akytec.de 
8 
7  Operation 
After the power supply is switched on the following values will be displayed successive-
ly: 
1.  Firmware checksum (8 digits, ticker-tape) 
2.  Firmware version (Ux.xx) 
3.  Measuring voltage 
If the measuring voltage is less than 5 V the error message 
0000
 will be displayed. 
If the measuring voltage is greater than 400 V the error message 
HHHH
 will be dis-
played. 
If the measuring voltage is not displayed correctly, check the connecting cable and the 
polarity. 










