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Technical Document Reader
Document
098-024
Name

AT3600 User Manual

Description
The full user manual for the AT3600 transformer tester.
AT3600 User Manual
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Expand 1 Introduction1 Introduction
Expand 2 Getting Started2 Getting Started
Collapse 3 Test Program Editor3 Test Program Editor
3.1 Introduction
Expand 3.2 Schematic Editing3.2 Schematic Editing
Expand 3.3 Creating The Program3.3 Creating The Program
Collapse 3.4 Programming Tests3.4 Programming Tests
3.4.1 Continuity
3.4.2 Winding Resistance
3.4.3 Equivalent Series Or Parallel Resistance
3.4.4 Winding Inductance
3.4.5 Inductance With Bias
3.4.6 Quality Factor
3.4.7 Dissipation Factor
3.4.8 Leakage Inductance
3.4.9 Interwinding Capacitance
3.4.10 Turns Ratio
3.4.11 Turns Ratio By Inductance
3.4.12 Impedance Impedance With Bias
3.4.13 Inductance Match
3.4.14 Capacitance Match
3.4.15 General Longitudinal Balance
3.4.16 Longitudinal Balance
3.4.17 Insertion Loss
3.4.18 Frequency Response
3.4.19 Return Loss
3.4.20 Impedance Phase Angle
3.4.21 Inter-Winding Phase
3.4.22 Trimming Adjustment
3.4.23 Output To User Port
3.4.24 Insulation Resistance
3.4.25 Hi Pot (DC)
3.4.26 Hi Pot (AC)
3.4.27 Surge (Impulse)
3.4.28 Wattage
3.4.29 Wattage (External Source)
3.4.30 Stress Wattage
3.4.31 Stress Wattage (External Source)
3.4.32 Magnetizing Current
3.4.33 Magnetizing Current (External Source)
3.4.34 Open Circuit Voltage
3.4.35 Open Circuit Voltage (External Source)
3.4.36 Low Voltage Open Circuit
3.4.37 Leakage Current
3.4.38 Inductance With Ext Bias (Series Circuit)
3.4.39 Inductance With Ext Bias (Parallel Circuit)
3.4.40 Impedance With External Bias
3.4.41 Hi Pot Ramp (AC)
3.4.42 Hi Pot Ramp (DC)
3.4.43 Voltage Breakdown (AC)
3.4.44 Voltage Breakdown (DC)
Expand 4 Using the Server4 Using the Server
Expand 5 Fixtures5 Fixtures
Expand 6 Front Panel Operation6 Front Panel Operation
Expand 7 Tests and Test Conditions7 Tests and Test Conditions
Expand 8 Specification8 Specification
Expand 9 Warranty and Service9 Warranty and Service
Expand 10 Safety Systems10 Safety Systems

3.4.5 LSB or LPB - Inductance With Bias (Series or Parallel Circuit)

The inductance of a transformer winding when a bias current is flowing may be tested using series or parallel equivalent circuit models. Initially the (dc) bias current is set up and allowed to stabilize. An ac voltage is applied across the selected winding; the voltage across and current through the winding are then measured using harmonic analysis. The measured voltage is divided by the current to obtain a complex impedance and the inductance is calculated .

On selecting ‘LSB Inductance with Bias (Series cct)’ or ‘LPB Inductance with Bias (Parallel cct)’ from the Available Tests window, a dialogue box will be displayed.


or:

To program the test:

  1. Enter the signal, frequency and bias current required for the test.
    Note that the signal is normally entered as a voltage by selecting the 'mV' or 'V' button; but you may optionally enter it as a current by selecting the 'mA' button. (If in doubt, refer to Chapter 7 - ‘Test Conditions’, which lists recommended test conditions for different values of inductance.)
    Note also that the Measure button may be used here as outlined in section 3.9, with the combinations of test parameter specification shown in the following table:
    Signal Specified voltage Specified current Auto Auto
    Frequency Specified Specified Specified Auto
    Bias Specified Specified Specified Specified
  2. Select (mouse click the button) the integration time you require.
    'Medium' is the default setting. 'Long' will give more stable readings (for tighter limits) at the expense of an increased test time, and 'Short' will test at the maximum speed, but may give a slightly noisier reading.
  3. Enter the terminal names between which the inductance will be measured. By pulling down the menu along side the fill-in box, you may select the high and low terminals for the test.
  4. Select (mouse click the button) the type of limits you require and enter the values.
    %   Enter a nominal value and then the limits as negative and positive percentage values.
    ><   Enter minimum and maximum values.
    >   Enter just a minimum value.
    <   Enter just a maximum value.
    Note that the Measure button may be used here as outlined in section 3.9.
  5. Select OK. The test specification will then be displayed in the program window.

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