Section 9
Publication 9-45
Issue 1 : 10/11
Section 9
Publication 9-45
Issue 1 : 10/11
Page 1 of 18
Danfoss AKS 41 Liquid Level Transmitter
Contents
1.
About this Publication ................................................................................................. 3
1.1.
Safety Warnings and Symbols ................................................................................................ 3
1.2.
Units of Measurement ............................................................................................................. 3
1.3.
Terminology ............................................................................................................................ 3
1.4.
Ordering Extra Copies ............................................................................................................ 3
2.
Application ................................................................................................................... 4
3.
Operation .................................................................................................................... 4
4.
Technical Data ............................................................................................................ 5
5.
Installation ................................................................................................................... 6
6.
Adjustment .................................................................................................................. 8
6.1.
Setting for the Refrigerant ....................................................................................................... 8
6.2.
Calibration for Minimum and Maximum Liquid Level .............................................................. 9
6.2.1.
Calibration for Minimum Liquid Level .................................................................................... 10
6.2.2.
Calibration for Maximum Liquid Level ................................................................................... 10
6.3.
Calibration for Minimum and Maximum Points Other Than 4 mA and 20 mA ....................... 10
6.3.1.
Minimum Calibration When Minimum Liquid Level Different From 4 mA .............................. 10
6.3.2.
Maximum Calibration When Maximum Liquid Level Different From 20 mA .......................... 11
6.4.
Signal Damping .................................................................................................................... 11
6.5.
Restore Factory Default Settings .......................................................................................... 12
7.
Commissioning.......................................................................................................... 12
8.
Maintenance .............................................................................................................. 12
9.
Faults and Remedies ................................................................................................ 13
10.
Spares ....................................................................................................................... 14
11.
Appendix 1 AKS 41 Early Version ............................................................................ 15
11.1.
Measuring Test Voltage ........................................................................................................ 15
12.
Adjustment (Early Version) ....................................................................................... 16
12.1.
Setting AKS 41 for the Refrigerant (Early Version) ............................................................... 16
12.2.
Calibration for Minimum Liquid Level (Early Version) ........................................................... 16
12.3.
Calibration for Maximum Liquid Level (Early Version) .......................................................... 16
12.4.
Calibration for Minimum and Maximum Points Other Than 4 mA and 20 mA ....................... 16
(Early Version)
12.5.
Signal Damping (Early Version) ............................................................................................ 17
List of Figures
Fig 1 Principle of Operation .................................................................................................................... 4
Fig 2 Wiring ............................................................................................................................................ 6
Fig 3 AKS 41 and AKS 41U Liquid Level Transmitters ........................................................................... 6
Fig 4 Calibration for the Refrigerant ........................................................................................................ 8
Fig 5 Calibration for Minimum and Maximum Liquid Level ..................................................................... 9
Fig 6 4 to 20 mA Output Signal Damping ............................................................................................. 12
Fig 7 AKS 41 (Early Version) Internal Layout of Transmitter Housing and LED Function .................... 15
List of Tables
Table 1 Technical Data ........................................................................................................................... 5
Table 2 Common Faults and Remedies ............................................................................................... 14
