Microtest MT-6920R User manual

MOTOR ARMATURE TESTER
6920
ENGLISH MANUAL
1st Oct 2008

MICROTEST
CATALOG
1. BEFORE USE.......................................................................................................................1
1.1 Product Introduction..........................................................................................................1
1.2 Product Characteristic .......................................................................................................1
2SPEC INSTRUCTION.........................................................................................................2
3SAFETY INSTRUCTION ...................................................................................................4
4INSTALLATION .................................................................................................................6
4.1 System Setup Procedure....................................................................................................6
4.2 Front Panel Function .........................................................................................................7
4.3 Back Panel Function..........................................................................................................9
4.4 Fixture Panel Function ....................................................................................................11
5OPERATION INSTRUCTION.........................................................................................12
5.1 Before Use.......................................................................................................................12
5.2 Function Instruction ........................................................................................................12
5.2.1 Function Enter Setting.............................................................................................12
5.2.2 Self-Testing ..............................................................................................................12
5.2.3 Fixture Pnumatic Control........................................................................................13
5.2.4 Temperature Testing Configuration ........................................................................13
5.3 System Instruction...........................................................................................................15
5.3.1 System Entering Setting ...........................................................................................15
5.3.2 System Environment Setting ....................................................................................15
5.3.3 Test Configuration Setting.......................................................................................16
5.3.4 System Time Setting .................................................................................................18
5.3.5 Password Setting .....................................................................................................19
5.4 File Management.............................................................................................................20
5.4.1 File Management Setting.........................................................................................20
5.4.2 Load File .................................................................................................................20
5.4.3 Create New File.......................................................................................................21
5.4.4 File Saving Instruction ............................................................................................21
5.4.5 Delete File ...............................................................................................................22
5.5 Setting Instruction ...........................................................................................................22
5.5.1 Test Setting Menu ....................................................................................................22
5.5.2 Fixture Setting .........................................................................................................23

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5.5.3 Resistance Test Setting ............................................................................................24
5.5.4 Insulation Test Setting .............................................................................................25
5.5.5 Hipot Test Setting ....................................................................................................26
5.5.6 Impulse (Surge) Test Setting....................................................................................27
5.6 Start Testing ....................................................................................................................33
5.6.1 Test Progress Procedure .........................................................................................33
5.6.2 Testing Message Analysis........................................................................................35
6. CALIBRATION PROCEDURE .......................................................................................37
6.1 Enter Configuration Procedure........................................................................................37
6.2 High Voltage Output Calibration ....................................................................................38
6.3 High Voltage Output Testing ..........................................................................................38
6.3.1 High Voltage Output Setting....................................................................................38
6.3.2 High Voltage Value Setting .....................................................................................39

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1. BEFORE USE
1.1 Product Introduction
MT-6920R is a tester which exclusive made for Motor Armature tester and it includes 8
4-wire testing independent testing points. The testing items are including DC Resistor
testing and Impulse / Surge Testing which can well examined your product and also
speed up the testing.
1.2 Product Characteristic
Speedy, time saving, efficiency
Programming control and analyze
Simple editing and easy learning
Simultaneously testing available
Sole testing available
Waveform display and storage
Non-destructiveness analyzing
Code function
Error stop function
Pass / Fail alarming
Temperature compensation

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2SPEC INSTRUCTION
DC Resistor
Measuring Range
0.01mΩ~100KΩ
Basic Accuracy
Low Resistance: 0.1mΩ~1Ω± (0.2% ± 1mΩ)
High Resistance: 1Ω~100kΩ± 0.1%
Hipot
Measuring Voltage
DC 500V ~ 3kV ±5%
Leakage Voltage
DC 0.1 ~ 10mA
Measuring Time
0.1 ~ 99.9 second continuously adjustable
Stable Accuracy
2%
Insulation Resistor
Measuring Voltage
100V ~ 1kV ± 5%
Measuring Range
1MΩ~ 9.9GΩ
Measuring Time
0.1 ~ 99.9 second continuously adjustable
Stable Accuracy
2%

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Layer Short
Measuring Voltage
200Vp-p ~ 3kVp-p ±1%
Measuring Item
Waveform area, waveform area difference, waveform tremor, waveform comparison,
flutter value
Stable Accuracy
2%
Other Spec
Measuring Pin
Depending on Samples
Display / Sound Device
Pass / Fail graphic display / Sound device
Power Supply
AC 220V / 110V ± 10% 50/60Hz
Temperature
10℃40℃
Humidity
Less than 60% relative

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3SAFETY INSTRUCTION
The instrument is not suitable using in outdoor especially in humid and dusty environment,
impropriate using may cause electronic shock. Before using the instrument, please read the safety
instruction completely in order to prevent any accident while using the instrument.
1. Security Signal
Caution
High voltage
Protect the GND terminal. Make sure the terminal connect the ground
conductor before using the instrument
Warning. Improper use of instrument may cause the instrument and DUT
breakdown
Warning. Improper use of instrument may caused injured or death
2. Electronic Shock
To avoid electronic shock, we strongly suggest to wearing rubber gloves before testing
3. Ground Conduction
Please make sure ground conductor at the back panel is well connected. Do not touch
the exterior case to avoid any accident
4. Power
The instrument built with 110V / 200V AC power. Please switch the AC power at the
back panel in order to match with the power which provide in the using area. Ensure
that only fuses with require type and current can be replaced, also please take off the
power before changing the fuses
Model
Mark (Input Voltage Range)
Fuse
6905
98~132V∕192~264V
5A, 250V
6920
98~132V∕192~264V
5A, 250V
6908
98~132V∕192~264V
5A, 250V

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5. Connect testing cable with HV output port
Please make sure the power is off when HV cable plug in the ports of the tester, and
ensure that the exterior of cables are not broken or come off
6. Warm Up
Warm up the machine at least 15 minutes in order to make the testing value accurate.
The instrument can still work normally without any warm up
7. Exterior Control
Do not touch HV port and DUT during operation
8. Breakdown
Stop the operation and contact your agent or Microtest immediately while there’s abnormal
condition with the testers
9. End Up
Turn off the power when the tester is not in use and do not turn the power on and off
continuously
10. Placing
The instrument must be placed under temperature 5°C~40°C and humidity 80%RH.
Also, in order to make the instrument accurate and safe, please do not place the
instrument under sunshine, high temperature, high humidity, unstable and dusty places
11. Emergency
Turn off and power off if DUT or main instrument is burning
12. Generally Guide
(1) Do not put any inflammables or heavy articles above the instrument
(2) Do not let the instrument under any serious hit
(3) Do not turn on and plug in the power while cleaning the instrument
(4) Do not dismantle or fix the instrument while the instrument is under unusual
circumstances and contact your agent or Microtest Corp. directly

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4INSTALLATION
4.1 System Setup Procedure
Start
6920 Setup
F6920 Fixture Setup
Measuring Items and
Golden Sample Setup
6908 and Accessories
Setup
Finish
Start Testing

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4.2 Front Panel Function
(1) Core 1: Testing Output Terminal for 1st of Fixture
(2) Core 2: Testing Output Terminal for 2nd of Fixture
(3) CH1: Testing Output Terminal for 6920 and 6908
(4) CH2: Testing Output Terminal for 6920 and 6908
(5) 1st Fixture Connector Slot: From the left to right order is 1 ~ 4 PIN.
(6) 2nd Fixture Connector Slot: From the left to right order is 5 ~ 8 PIN.

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※There is no 2nd Fixture Connector Slot without 48 Channels or Double Fixtures
Option.

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4.3 Back Panel Function
(1) 6905 and 6920 HV Output Port (Connect by RED cables)
(2) 6905 and 6920 HV Input Port (Connect by BLACK cables)
(3) Temperature Sensor Port
(4) Solenoid Valve Connect Port for 1st Fixture
(5) Solenoid Valve Connect Port for 2nd Fixture
(6) RS-232 Port: Connect 6905 and 6920
(7) Printer Port

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(8) Remote Port (For Foot Switch)
(9) Ground Conduction Port
(10) Connect Ports for 6920 and 6908

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4.4 Fixture Panel Function
(1) DUT Diameter Adjuster: Use hexagon screw to adjust the elasticity of DUT
(2) DUT Installation: Place DUT @ no. 2. The Pin number is counted as counter
clockwise (Pin 1~Pin 24)
(3) Horizontal Adjuster: Make sure the probes are needled to the metal clips of DUT
(4) Solenoid Valve Port: Connect AIR 1 of 6908 to the fixture solenoid valve, and
connect to AIR 2 if it is the 2nd fixture.

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5OPERATION INSTRUCTION
5.1 Before Use
1. The instrument built in 110V / 220V AC power. Please switch AC power at the back
panel to match with the current in local area
2. Make sure the power is off when HV cables plug in the ports of the tester, also
please ensure that exterior of cables are not broken
3. Warm up the testers at least 15 minutes in order to reach an accurate value. The
instruments can still work normally without any warm up.
5.2 Function Instruction
5.2.1 Function Enter Setting
Press FUNC key under the main menu
Figure 5.2.1-1
5.2.2 Self-Testing
Press S1 under Function Menu and enter Self Test mode and start the self
testing. Test items are CPU, RAM, ROM, EEPROM, CLOCK…etc. If test
result is NG, power off the tester and contact your agent or Microtest Corp. to
repair the instrument

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Figure 5.2.1-2
5.2.3 Fixture Pnumatic Control
Press S4 to enter Fixture Pnumatic Control. Select Fixture 1 or 2 to set up the
power of the fixture
Figure 5.2.3.1
5.2.4 Temperature Testing Configuration
PessS4 under Function Menu and enter Temperature Testing Configuration
mode. The function helps the testing progress under usual temperature and
which make the test results more accuracy

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Figure 5.2.3.1
Configuration: Press S2 and manager code under Temperature Testing Configuration
mode and start the calibration. Press S1 and S2 to adjust the value
and make it same as the standard temperature
Figure 5.2.3-2
Fahrenheit / Centigrade: Press S3 under Temperature Test Configuration mode
to switch the temperature module.

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Figure 5.2.3.3
5.3 System Instruction
5.3.1 System Entering Setting
Press SYS at the main menu to enter System Setup Menu
Figure 5.3.1.1
5.3.2 System Environment Setting
Press S1 to enter System Setup. If want to modify the contents, use navigation
key to moved the cursor and press S1 to modify the contents

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Figure 5.3.2.1
Line Frequency: Line Frequency can be switched from 50Hz to 60Hz
Tester ID No. : For the user who has several instruments. Default value is 1, the
maximum value is 999, use numeric key to edit and press ENTER to
finish setting
Key Lock: Keypad lock function
Warning! Key Lock function must key in secret code
LCD Contrast: Use S1 to adjust the brightness of LCD screen
Remote Output: Press S1 to setup control type, Standard, Extend, Unused
Power On Self-Test: Press S1 to Lock or Unlock the Power On Self-Test
WARNING: If self testing is NG, please turn off power immediately and contact
your agent or Microtest Corp. immediately
Language: Press S1 to change language
5.3.3 Test Configuration Setting
Press S2 to enter Test Configuration, use navigation key to move cursor and
press S1 to modify the contents

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Figure 5.3.3.1
Temp. Correction: Press S1 to turn on / off the function
Warning: Please turn off Temperature Correction function during
configuration.
Test Alarm: Press S1 to select setup item as follow…
None No alarm whether the result is pass or fail
All Alarm when the results are pass and fail
Pass Alarm only DUT is pass
Fail Alarm only DUT is fail
Test Data Font: Press S1 to select the size of data font
Show Testing Wave: Press S1 to select the display of waveform; use S4 to enter
graphic setup