Microtest 6235 User manual

Transformer Analyzer
6235/6236/6237/6238
User Manual

1. SAFETY ................................................................... 1–1
1.1 GENERAL ................................................................. 1–1
1.2 AC POWER SUPPLY ........................................................... 1–1
1.3 ADJUSTMENT, MAINTENANCE AND REPAIR ........................................... 1–1
1.4 STATIC ELECTRICITY ........................................................ 1–2
2. INTRODUCTION ............................................................. 2–1
3. INSTALLATION ............................................................. 3–1
3.1 AC LINE CONNECTIONS ....................................................... 3–1
3.2 ACCESSORIES .............................................................. 3 – 1
3.3 MEASUREMENT CONNECTION ..................................................... 3–1
4. OPERATION ................................................................ 4–1
4.1 THE REAR PANEL .......................................................... 4–1
4.1.1 Voltage Selector ................................................... 4–1
4.1.2 IEC Socket and FUSE Holder ......................................... 4–1
4.1.3 Rear panel control connections ..................................... 4–2
4.1.4 DC 5V Out .......................................................... 4–2
4.1.4.1 External Trigger (A-B) ......................................... 4–2
4.1.4.2 DC 5V Output (A-C) ............................................. 4–2
4.1.5 GPIB Connector ..................................................... 4–2
4.1.5.1 GPIB connector Pin Assignment .................................. 4–3
4.1.6 Switch the instrument on ........................................... 4–3
4.1.7 Switch the instrument off .......................................... 4–3
4.2 THE FRONT PANEL ........................................................... 4–4
4.2.1 The Soft Keys ...................................................... 4–4
4.2.2 The Navigation Keys ................................................ 4–4
4.2.3 The Data Entry Keypad .............................................. 4–5
4.2.4 Keypad Codes ....................................................... 4–6
4.2.5 System ............................................................. 4–6
4.3 FILE CATALOGUE ............................................................ 4–8
4.4 TRANSFORMER, FIXTURE TEST SET ............................................... 4–8
4.4.1 WINDING/FIXTURE .................................................... 4–8
4.4.2 L/LK/Q/Rac/Z/D/Ø/X/Y measurement parameters ........................ 4–9
4.4.3 DCR ............................................................... 4–12
4.4.4 TURN RATIO ........................................................ 4–13
4.4.5 C lose capacitance measurement item ............................... 4–14
4.4.6 BALANCE ........................................................... 4–15
4.4.7 PIN SHORT ......................................................... 4–16
4.4.8 CORRECTION ........................................................ 4–16

1–11–1
1. SAFETY
1.1 General
This equipment has been designed to meet the requirements of EN61010-1 safety
requirements for electrical equipment for measurement control ＆ laboratory
use ,and has left the factory in a safe condition .
This product is not intended for use in atmospheres that are explosive corrosive
or adversely polluted (e.g. containing conductive or excessive dust). This
equipment is only used in the manner specified .If it is not used in such a manner
the protection provided by the equipment may be leak electricity
If the equipment is damaged, do not use it and have it marked.
Wayne Kerr Electronics and the associated sales organizations accept no responsibility
for personal or material damage , or for any consequential damage that results from
irresponsible or unspecified operation or misuse .
1.2 AC power supply
Power cable and connector requirements vary between countries, always use a cable
that conforms to local regulations, terminated in an IEC 320connector at the
instrument end .If the plug is fused, a 3-amp fuse should be fitted .If the power
cable electrical connection to AC power plug is through screw terminals, then
adjusted the rear panel 115v\230v on or off button ensure that is set to voltage
of the local AC power supply.
WARNING!
Any interruption of the protective ground conductor inside or outside the
equipment or disconnection of the protective ground terminal is likely to make
the equipment dangerous intentional interruption is prohibited.
1.3 Adjustment, Maintenance and Repair
WARNING!
The equipment must be disconnected from all voltage sources before it is opened
for and adjustment, maintenance or repair.
When the equipment is connected to the local AC power supply internal terminals
may be live and the opening of the covers or removal of parts (except those to
which access can be gained by hand) is likely to expose live parts. Capacitors

1–21–2
inside the equipment many still be charged even if the equipment has been
disconnected from all voltage sources.
Any adjustment, maintenance or repair of the opened equipment under voltage must
be carried out by skilled person who is aware of the hazards involved service
personnel should be trained against unexpected hazards.
1.4 Static electricity
The unit supplied uses static-sensitive devices.
1) The work surface should be a conductive grounded mat
2) Soldering irons must be grounded and tools must be in contact with a conductive
surface to ground when not in use.
3) Any person handling static-sensitive parts must wear a wrist strap which
provides a leaky path to ground impedance not greater than 1M.
4) Components or circuit board assemblies must be stored in or on conductive foam
or mat while work is in progress.

2–12–1
2. INTRODUCTION
Figure 2□1 6235 Transfomer Analyzer
623x series provides 4-terminal comprehensive analyze of transformer, including
DC measurement and AC measurement over frequency range 20 Hz to 200kHz/500kHz/1MHz.
Impedance measurement are perform at drive level between 10mV to 2V rms, while
measuring turns ratio, can be up to 10Vrms
Display and control
•Transformer Fixture Setting
•Winding Mapping and Learning
•Fixture Pin Short Setting
•Fixture Open and Short Correction
•Balance
•Font Selection for Measurement Results
•Automatic measurement function
•Timely Statistics function
•Link to the computer

3–13–1
3. INSTALLATION
3.1 AC line connections
The unit is provided with a power cable capable of carrying the input current for
both 115V and 230V operation. This cable should be connected via a suitable
connector to the local mains power supply. Terminated in an IEC 320connector at
the instrument end, the use must ensure the connective is fine. If the plug is
fused, a 3-amp fuse should be fitted .If the power cable electrical connection
to AC power plug is through screw terminals, then adjusted the rear panel 115v\230v
on or off button ensure that is set to voltage of the local AC power supply.
Accumulator and DC power unsuitable this unit
The switch of power and select on rear panel
3.2 Accessories
623x can be used with any Wayne Kerr Electronics leads or fixtures, only use
qualified accessories to ensure accuracy of measurement.
Auto Scanning BOX model F5220, Part No. TF6235-J1
3.3 Measurement connection
BR RD OR YW
TF6235-J1

4–1
4. OPERATION
WARNING!
This equipment is intended for use by suitably trained and competent persons.
This product can cause hazard if it is not used in accordance with these
instructions (connective ground or touch the part component unmoral )Read them
carefully and follow them in all respects .Double check connections to the unit
and accessories before use.
.
Do not use this equipment if it damaged
4.1 THE REAR PANEL
Figure 4□1 The6235 Series Rear Panel
4.1.1 Voltage Selector
The instrument can be operated from an AC power source of either 115V or 230V.
Before applying AC power to the IEC socket, ensure that the voltage selector
is set to the voltage of the local AC power supply.
4.1.2 IEC Socket and FUSE Holder
Please read section 1.2 – AC Power supply before connecting the IEC socket to
the AC power source.

4–2
4.1.3 Rear panel control connections
Label Type Use Reference
GPIB Standard GPIB For remote operation. Sections 4.1.6 and 6
DC 5V out Stereo phone jack
1. Duplicates action
of front panel
trigger key.
2. DC 5V output
Section 4.1.4
RS-232 9-way D-type (male) Reserved
PRINTER Port 25-way D-type (female) Reserved
Handler RJ45 connector OPTIONAL - to interface
to PASS /FAIL signal
4.1.4 DC 5V Out
4.1.4.1 External Trigger (A-B)
Function same as front panel control,use TTL compatible singnal. While connected
to low level, function as Trigger.
4.1.4.2 DC 5V Output (A-C)
DC 5V output terminal is designed for user to output DC,the terminal supply DC
5V with maximum current of 1.5A .
Figure 4-2 the contact assignment of the phone jack
4.1.5 GPIB Connector
The instrument supplied with GPIB interface, which allows easy connection
between instrument and PC for fast and remote controlled measurement.

4–3
4.1.5.1 GPIB connector Pin Assignment
Pin Description Pin Description
1 Data Line 1 13 Data Line 5
2 Data Line 2 14 Data Line 6
3 Data Line 3 15 Data Line 7
4 Data Line 4 16 Data Line 8
5 EOI (End or Identify) 17 REN (Remote Enable)
6 DAV (Data Valid) 18 Ground
7 NRFD (Not Ready For Data) 19 Ground
8 NDAC (Not Data Accepted) 20 Ground
9 IFC (Interface Clear) 21 Ground
10 SRQ (Service Request) 22 Ground
11 ATN (Attention) 23 Ground
12 Screen 24 Signal Ground
4.1.6 Switch the instrument on
Press the POWER switch located on the rear panel, the instrument model will
display and then the instrument will display the mode and settings when the
instrument was last switched off.
If the display is too bright or too dark, use the CONTRAST control on the rear
panel to set the contrast level.
To return to the MAIN MANU press the Menu control key.
4.1.7 Switch the instrument off
The power can be switched OFF at any time without damage to the instrument, but
to avoid losing trim and calibration data, the instrument should be switched
OFF when it is in a quiescent state rather than when is running a routine, e.g.
trimming, calibration.

4–4
4.2 The front panel
The 6235 Series Front Panel
4.2.1 The Soft Keys
623x series instrument has 10 soft keys, the functions of the soft keys change
according to the mode selected, soft keys are located on the right side of display,
used to select corresponding function on the display.
Soft Keys
Soft Keys
4.2.2 The Navigation Keys
Figure 4.2 The Navigation Keys

4–5
Press the to set parameter on screen, press the to set Comp.
4.2.3The control keys
Menu
File
Set
Trigger Test
Figure 4.3 The Control Keys
4.2.3 The Data Entry Keypad
e Data Entry Keypad
The Data Entry Keypad is a multifunction key set permitting manual entry of data
values, measurement units and control codes,
The Units key must be used prior to keying a unit. Where more than one unit is
available on a key, e.g. D/Q or V/A, pressing the key will display the first
unit, press the key again will display the second unit. Terminate the units mode
with Enter to accept the key sequence.
An invalid keypad entry may cause the entry line to be cleared and an error message
as shown in Figure below, in which case the existing settings will be preserved.

4–6
The +/- key may be used before or after a value to change its sign. Keep pressing
the key will toggle the value between positive and negative, For numbers which
are positive only, the key is disbled.
4.2.4 Keypad Codes
A number of special functions are available by press Code followed by a valid
code number and terminated with Enter. The code
4.2.5 System
Table 1
Press Menu，menu display on the screen, press System to enter system set up, use
to shift the items.
1) Line frequency： 50Hz or 60Hz
2) Beep： Use to choose test success beep, failure beep or mute.
3) Trigger mode：
a. Single: single trigger single test。
b. Repebtive: single trigger repeptive test
4) Trigger delay： Trigger time
5) Display test data： Display test result. Can chose to display All steps
or Fail steps only
6) Display font: Display font size

4–7
7) Inverse LCD：LCD back light
8) Print test data：Automatic print of test result, or press the print key
for printing.
9) Upload test data：pass the test result to computer via RS-232 (Figure 2)
RS-232：
a. Tester ID number：
b. Baud rate：
c. Character length：
d. Stop bits：
e. Parity：
f. Terminator：
Figure 2
10) Lock edit key：

4–8
4.3 File Catalogue
1) LOAD： Load saved file
2) SAVE AS： Save as new file
3) NEW：Set up new file
4) DELETE：Delete file
5) QUIT：Return to the previous display
4.4 Transformer, Fixture Test Set
Switch the instrument on. Connect leads or fixture to BNC connectors on front
panel. Every time while there is lead or fixture change, make correction according
to
Following are the practice order of measurement
4.4.1 WINDING/FIXTURE
1) Press the Set key， the menu will display
2) Press the soft key FIXTURE to enter measurement mode, set the transformer
Pin to corresponding fixture channel。(Figure 1)
3) Mapping： Use the Mapping to set channels automatically，it can also be set
manually.
4) Clear：clear current setting。
5) Clear all：clear all current settings。

4–9
Figure 1
6) Press WINDING key to enter winding setting 。(Figure 2)
Figure 2
7) Clear：single clear
8) Clear all: to clear all settings
9) Exit：return to main menu
4.4.2 L/LK/Q/Rac/Z/D/Ø/X/Y measurement parameters
Press L/LK/Q/Rac/Z/D/Ø/X/Y on the main menu to enter setup menu（Figure 1）

4–10
，
Figure 1
1) Set wind：
1Wind：to set winding to be tested（Figure 2 ）
2Meas： start measurement
3Copy：copy previous setting
4Delete：delete current settings
5PIN SHORT：fixture relay short setting，press Short key to set up
6%：Set the maximum and minimum values
7Exit：return to main menu
Figure 2
2) Para： to select the parameters, press Para to select parameter to be tested
(Figure 3)

4–11
Figure 3
3) Freq: measurement frequency，
Ranges: 6235: 20Hz~200KHz ； 6236:20Hz~500KHz ；
6237:20Hz~1MHz。(Figure 4)
4) Volt：set voltage : 10mV~2V。
Figure 4
5) Std：setup standard values, press Meas key to start measurement, press Accept
to accept the value (figure 5)

4–12
Figure 5
6) Max：to set Maximum value Min：to set Minimum value, press key % to setup
(Figure 6)
Figure 6
4.4.3 DCR
1) Wind： to set winding to be tested
2) Meas： start measurement
3) Copy： copy previous setting
4) Delete：delete setting
5) %：Set the maximum and minimum values
6) Exit：return to main menu
7) Std： setup standard values, press Meas key to start measurement, press Accept
to accept the value
8) Max：to set Maximum value Min：to set Minimum value, press key % to setup
9) Rate: setup measurement speed rate

4–13
10) Dly： set delay time
Figure 1
4.4.4 TURN RATIO
1) WIND： to set winding to be tested (FIGURE 1)
2) Meas：start measurement
3) Copy：copy previous setting
4) Delete：delete setting
5) %：Set the maximum and minimum standard value
6) Exit：exit setup menu
7) Pri：setup primary winding, press Wind to select
8) Sec： setup secondary winding
9) Freq ： measurement frequency 6235:20Hz~200KHz ； 6236:20Hz~500KHz ；
6237:20Hz~1MHz。
10) Volt：set voltage : 10mV~2V。
11) Std：setup standard values, press Meas key to start measurement, press Accept
to accept the value
12) Max：to set Maximum value Min：to set Minimum value, press key % to setup

4–14
Figure 1
4.4.5 C lose capacitance measurement item
Press C to enter (figure 1)
1) Meas：start masurement
2) Copy：copy previous setting
3) Delete：delete setting
4) %： Set the maximum and minimum standard value
5) Exit：exit this menu
6) Pin+：Define the transformer pin as pin+
7) Pin-：Define the transformer pin as pin-
8) Freq ： test Frequency 6235:20Hz~200KHz ； 6236:20Hz~500KHz ；
6237:20Hz~1MHz。
9) Volt：set voltage: 10Mv~2v。
10) Std：setup standard values, press Meas key to start measurement, press Accept
to accept the value
11) Max：to set Maximum value Min：to set Minimum value, press key % to setup
12) Rate: setup measurement speed rate
13) Dly：setup delay time