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