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
0.001- 999 (+2%+0.1Q @ 1KHZ, +5%+0.5Q@
Other Freq. Q<100.0)
@ 1KHZ, +0.001+2%rdg @ Other Freq.
(Rac) & Impedance (Z)
0.001-1.0000 ( +0.2%+1
dgt @ 1KHZ +0.5%+1 dgt @ OTHER ) With
(Supplied on option)
Turn ~ 10,000 Turns (0.5% + 0.5T)
/ 50 ~ 60 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
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
Range: 1 T to 10,000T in 2 ranges.
+ 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
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)
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 gowith 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.