IET Labs HARS-LX, User And Service Manual, Page: 5 / 22

Contents
Chapter 1 Introduction ..............................................................................1
1.1 Introduction ........................................................................................................... 1
Chapter 2 Specifications ...........................................................................2
Specifications ................................................................................................................ 2
Chapter 3 Installation ................................................................................4
3.1 Initial Inspection ................................................................................................... 4
3.2 Installation ............................................................................................................. 4
3.3 Repackaging for Shipment .................................................................................... 4
3.4 Storage .................................................................................................................. 4
Chapter 4 Operation ..................................................................................5
4.1 Initial Inspection and Setup .................................................................................. 5
4.2 Connection ............................................................................................................ 5
4.2.1 General Considerations ............................................................................... 5
4.3 Electrical Considerations ...................................................................................... 5
4.3.1 Thermal emf Considerations ....................................................................... 5
4.4 Dial Setting ........................................................................................................... 6
4.5 Power Considerations ........................................................................................... 6
4.6 Environmental Conditions .................................................................................... 6
4.7 Switch Conditioning ............................................................................................. 6
4.8 Meter Shunt Applications ..................................................................................... 7
4.9 Kelvin Bridge Applications ................................................................................... 7
Chapter 5 Maintenance ..............................................................................8
5.1 Maintainability and Reliability ............................................................................. 8
5.2 Preventive Maintenance ........................................................................................ 8
5.3 Calibration ............................................................................................................. 8
5.3.1 Calibration Interval ..................................................................................... 8
5.3.2 General Considerations ............................................................................... 9
5.3.3 Required Equipment ................................................................................... 9
5.3.4 Calibration Procedure ................................................................................. 9
5.4 Adjustments........................................................................................................... 10
5.4.1 Adjustment Considerations ......................................................................... 10
5.4.2 Adjustment/Trimming Procedure ............................................................... 10
5.5 Replaceable Parts List ........................................................................................... 12
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