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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

3.4.15 GBAL - General Longitudinal Balance

The general longitudinal balance test is intended to measure what is effectively the Common Mode Rejection Ratio of a transformer designed to connect to a balanced line. Two measurements are performed each by applying a voltage to the transformer and measuring the resulting voltage to calculate the CMRR. To overcome the differences of three standard methods of measuring the CMRR the GBAL dialogue box has a separate group of terminals X and Y for the first and second measurements respectively. The preferred method of measurement is the LBAL test for which Voltech provide a separate test specifically for this measurement.

This test is suitable for audio & telecommunication transformers and checks the effective common mode rejection ratio of the transformer.

On selecting "GBAL General Longitudinal Balance" from the available tests window, a dialogue box will be displayed:

To program the test:

  1. Enter the voltage and frequency parameters of the test signal.
    (If in doubt, refer to Chapter 7 - ‘Test Conditions’, which lists recommended test conditions).
    Note also that the Measure button may be used here as outlined in section 3.9.
  2. Select 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 names for the energised and measured terminals for the X measurement.
  4. Similarly configure Y terminals.
  5. When required the "Optional 2nd Energised Hi" allows an additional terminal connection to the energised high node.
  6. Set (X/Y) limits.
    +/- Enter a nominal value and then the limits as negative and positive values.
    >< Enter minimum and maximum values.
    > Enter just a minimum value.
  7. Since components on the test fixture may scale measured readings the "Compensate for Test Fixture Scaling" allows the test to account for this.
  8. Select OK. The test specification will then be displayed in the program window.

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