DIGITAL TURNS TESTER &

 DIGITAL LCR METER TURNS-LCRTZ

(Multiple test in one instrument)

Vasavi Digital Turns Tester can test Inductance,
Capacitance,
AC Resistance,
DC Resistance, 
Impedance,
Transformation Ratio Turns
and winding polarity (for transformers with TR JIG). Simultaneous indication of  value & tan delta . 
Very high resolution of tan delta. 0.0001
Optional RS232C port for PC control with control software for MULTI-TESTING.

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Vasavi Digital Turns tester and LCR Meter is Ideal for automatic and fool proof testing of 
Toroidal coils, Energy meter CT's and Bobbins, Low Tan delta Power capacitors,

Vasavi Digital Turns tester and LCR Meter can test SMALL TRANSFORMERS like SMPS transformers, Telecom Transformers (HYBRID, POT CORE, RM-CORE), Pulse transformers etc.

Vasavi Digital Turns tester and LCR Meter Turns LCRTZ is  specially designed for transformer and coil manufacturers and users. Click to Study the write-up.

Vasavi Digital Turns tester and LCR Meter has Simultaneous indication of  value & tan delta with Very high resolution of tan delta. 
Vasavi Digital Turns tester and LCR Meter is most ideal for toroidal coils and wound bobbins .  Click to study the write-up.

Vasavi Digital Turns tester and DIGITAL LCR  METER  SPECIFICATIONS:
Measurement  Freq.:100HZ,1K,5KHZ,10 KHz          Measure Mode: Series/Parallel EQ. selectable.
Measurement Voltage: 0.1 V – 1.0 V RMS
Four Terminal or Kelvin Test:  For eliminating  lead resistance/inductance.
Display     : Simultaneous display of Value  with Units and D.F/Q.F.: 
0.5" LED Display : 4dgt -Value, 2dgt -Units   4 dgt - D.F./Q.F/P.A. Plus LED status indication.
Auto Ranging with Range-Hold facility.
Inductance (L):0.1uH-200H                                                Capacitance(C):0.1pF-2000uF
Res. (Rac) & Impedance (Z): 0.01 Ohm-200KOhm              Res. (Rdc): 0.01Ohm-20KOhm      
Trans.Ratio & POLARITY: 0.001-1.0000 ( +0.2%+1 dgt @ 1KHZ     +0.5%+1 dgt @ OTHER ) WithTRJIG (Supplied on option)
Tan Delta (D.F.):  0.0001-9.999     (+0.0002+1%rdg @ 1KHZ, +0.001+2%rdg @ Other Freq.
Quality Factor (Q.F.):0.001- 999 (+2%+0.1Q @ 1KHZ, +5%+0.5Q@ Other Freq. Q<100.0)   
Power requirement : 230V+10%  50 HZ AC MAINS

Vasavi Digital TURNS  TESTER  ATTACHMENTS
Toroidal Turns Platforms:  TTPT100: 5 T - 1000 T ,    TTPT1000: 500T-10000 T 
Accuracy : + 0.2% + 0.5T for high and  medium permeability cores at suitable test frequency.  
Internal  Diameter  must be able to pass a wire as thin as 0.2 mm.  External Diameter as high as 200 mm.
Test Frequency Selectable 50, 100 , 500, 1, 5, 10 KHz. Test Voltage adjustable 100mV to 1V in steps of 50mV.
The Platform has 2  connections for the coil and 2 for the probe wire. Measurement  principle is  based on dynamic  comparison of the voltage  across one turn and the coil. You will be able to get the polarity or winding indication  with respect  to the one  turn reference.
Possible Tests:Can   test Turns, Inductance, Polarity, DC resistance at  one go by controlling the instrument by PC  and connecting the coil to the platform.
Turns test for non-toroidal coils or transformers: Test turns for  any transformer or coil with core . The core can be EI,EE,UU, RM, POT  etc.  You must be able to pass any thin probe wire around the winding. The core must not have air gap.
3 modes of  testing for Toroidal Coils . 
Mode-1: Turns and polarity with turns  platform. Mode-2: Inductance / DC Resistance direct.
Mode-3:Turns, Polarity, Inductance, Indication of Shorted turns  and  DC Resistance  all  at one go dyanamic test  with RS232C control.  Set  limits  for PASS/FAIL. Take  printed report if required. Test more than 2,000  CTs per  shift.  

Bobbin  Turns Test  Platform  BTPT10000
Range:    1 T to 10,000T  in 2 ranges.   Accuracy:  + 0.5% + 0.5T. Coil : I.D. >11mm , O.D.< 60 mm , Ht < 80 mm
Calibration for Bobbin Turns test Platforms only: With master coil required for each type of coil.
The platform has  two connections with a probe rod. You  have to insert the coil in the vertical open  probe and connect  the wire ends to the terminals. You may need a master coil as the  pickup of the magnetic probe varies with geometry and placement. You have to check  with a standard coil  with  known number of  turns and calibrate the meter.
Possible  tests:You will be able to  test  Turns, Inductance, Polarity, DC resistance  on individual test basis. While connected to  platform you can test  Turns and polarity . You can also test inductance, and DC Resistance while directly connected to the  instrument, without  turns platform.

Other Features
Kelvin Test: For Direct connection without platform the  instrument  has 2  pairs of connections. One pair for drive and the other pair for sense. This separate connection can be utilized for  testing transmission / transformation parameters. You will be able to test transformation ratio.
Impedance Test: Though impedance is  2 pin test, it also involves connection of load impedance or load resistance. If you are testing impedance only,  you can connect the load impedance permanently to the test jig.
Winding  Polarity  Test:  In  addition  to  Transformation ratio test,  the instrumentalso checks the polarity  of  winding  with  respect  to reference winding. If  the  secondary is  not in phase with primary then the system displays  -ve sign.
Unbalance Test (with RS232C control): This test calculates the percentage unbalance of the previous two tests. You can measure unbalance of Inductance, Capacitance, Resistance and Impedance.  If the individual readings are R1 and R2 then
         UNBALANCE= (R1-R2) x 100
                                (R1+R2)

Vasavi Digital Turns Tester with RS232C Control : (PC Control Software)
The instrument is controlled through external PC through RS232C port. The system software works on Windows platform. All the test results will be transferred to a database files with connected file name. The database table is compatible to fox-pro table. You can import these files to other softwares for creating graphs and other analysis.

User  Friendly Menu driven software
The instrument  not only  tests and displays the results but  also analyses the tested  results against  set  limits on each parameter.Each  test  can be defined with different  test  parameters and different test conditions like Test  frequency. After completing the tests as per defined procedure the results  are dynamically displayed after each test on the monitor of the system.
Password Requirement: The control software expects two levels of users. 
Level-1 user - Person with Password: A person  who  understands the transformer, its windings, drawings,  specifications. This  person  will   be  provided with the password  and  will be able to access all menu items.
Level-2 user - Person without Password: This persons can select the test file, test the components and take reports.

Testing Multi-pin transformers at one go with Pause Option: You can test multipin component with this option. The system pauses before each test. Suppose that you have defined 10 tests with pause option. While testing, the display prompts you to press a key before each test. Before pressing the key change the input connections for the coming test. You need not to remember or note the test results for each test. The system consolidates all the defined  tests , displays the tested results and also prompts you Go or NO GO based on limits entered for each parameter. Further you can also take  a report on the printer if selected and connected.
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Vasavi Electronics Manufacturers of Turns counter , LCR Meter , Digital Turns Tester and Digital LCR Meter with transformation ratio platform for transformers, Coil Testing, Toroid turns Tester, Toroidal Turns Counter , Bobbin Turns tester , Bobbin turns counter , Coil Turns tester, Coil Turns Counter , Automatic  Transformer Tester, Automatic Relay Tester.