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Danfoss AKS 41 Liquid Level Transmitter 

Section 9 

 

Publication 9-45 

Issue 1 : 10/11 

 

Page 3 of 18 

1. 

About this Publication 

These instructions have been prepared according to the following 
standards: 

BS 4884 : Technical Manuals: 

Part 1 : 1992 Specification for Presentation of Essential 
 

 

Information. 

Part 2 : 1993 Guide to Content. 
Part 3 : 1993 Guide to Presentation. 

BS 4899 : User’s Requirements for Technical Manuals: 

Part 1 : 1991 Content. 
Part 2 : 1992 Presentation. 

BS 4899 is based on the principles of BS 4884. 

BS 5378 : Part 2 : 1982 Safety Signs. 

1.1. 

Safety Warnings and Symbols 

The system of safety warnings and symbols is based on BS 5378 : 
Part 2 : 1982 Safety Signs and BS 4884 : Technical Manuals : Part 1 : 
1992 Specification for Presentation of Essential Information. 

 WARNING 

This denotes an immediate hazard with a high likelihood 
of personal injury or death if instructions, including 
recommended precautions, are not followed.  There is 
also a potential risk of damage to the product, process 
or its surroundings. 

 CAUTION 

This draws attention to instructions which must be 
complied with to avoid damage to the product, process 
or its surroundings. 

NOTE: draws attention to important additional 
information. 

1.2. 

Units of Measurement 

Quantities are expressed in SI units or SI derived units. 

1.3. 

Terminology 

Terminology, abbreviations and acronyms are those currently in use 
throughout the refrigeration and air conditioning industry. 

1.4. 

Ordering Extra Copies 

Extra copies of these instructions can be obtained from J & E Hall 
International.  For contact details go to www.jehall.com. 

Summary of Contents for Danfoss AKS 41

Page 1: ...A 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 V...

Page 2: ...art of this publication may be reproduced or transmitted in any form or by any means electronic or mechanical including photocopying recording or by any information storage or retrieval system without...

Page 3: ...ls Part 1 1992 Specification for Presentation of Essential Information WARNING This denotes an immediate hazard with a high likelihood of personal injury or death if instructions including recommended...

Page 4: ...out the earlier version fitted with one green and one red LED can be found in Appendix 1 3 Operation The transmitter comprises consists of two parts an inner insulated electrode and an outer tube with...

Page 5: ...liquid level is registered as an increase in the rod s capacitance and hence results in a higher 4 to 20 mA output signal 4 Technical Data PARAMETER DETAILS General Enclosure IP 65 Max working press 1...

Page 6: ...HT MODEL INSERTION LENGTH B WEIGHT AKS 41U 6 152 mm 1 32 kg AKS 41 3 280 mm 1 7 kg AKS 41U 8 203 mm 1 41 kg AKS 41 5 500 mm 2 0 kg AKS 41U 12 305 mm 1 55 kg AKS 41 8 800 mm 2 4 kg AKS 41U 15 3 389 mm...

Page 7: ...Seal Outer Tube Plug can be mounted in four different positions Transmitter housing and tube can be separated without emptying the standpipe A B 1 BSP AKS 41 NPT AKS 41U Transmitter Housing Assembly...

Page 8: ...here is no voltage to the level transmitter Press the calibration push button and keep it depressed while refitting the connecting plug Release the push button the green LED is extinguished until the...

Page 9: ...ends 43 mm from the top gasket s contact face The liquid level transmitter has been factory calibrated to R717 ammonia so that the entire measuring range is utilised i e the transmitter s output sign...

Page 10: ...op of the rod measured from the gasket s contact face b Press the calibration push button and keep it depressed for approximately 5 seconds until the green LED stops flashing then release c Within the...

Page 11: ...n be measured b Bring the refrigerant liquid level to the desired maximum level c Press the calibration push button and keep it depressed for approximately 5 seconds until the green LED stops flashing...

Page 12: ...re Factory Default Settings To restore default settings press the calibration push button and keep it depressed for a minimum of 20 seconds until the green LED starts flashing Release the push button...

Page 13: ...e to gain access to the four screw terminals inside the plug where the four wires are connected Measure the resistance in the outer current loop between terminals 2 and 3 the plug must not be mounted...

Page 14: ...FAULT Output signal current is constant 4 mA Probable Cause Remedy Green LED flashing red LED also flashing early versions The transmitter is in setting mode Interrupt the supply voltage for about 10...

Page 15: ...t activated the green LED flashes When the programming button is activated the green LED follows the activation i e the green LED is On whenever the programming button is pressed Fig 7 AKS 41 Early Ve...

Page 16: ...arry out 12 2 step a first b Bring the liquid refrigerant to the level corresponding to the maximum limit of the measuring range i e the point on the rod where the transmitter s output signal is to be...

Page 17: ...16 75 mm A signal current of 6 mA therefore corresponds to a liquid level of 2 x 75 150 mm and a signal current of 12 x 75 900 mm As the liquid level can be adjusted between 100 and 950 mm it is poss...

Page 18: ...Danfoss AKS 41 Liquid Level Transmitter Publication 9 45 Section 9 Page 18 of 18 Issue 1 10 11 This page intentionally blank...

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