Tegam 253 Instruction Manual
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Tegam 253 Instruction Manual

General purpose, portable impedance/lcr meter
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253
General Purpose, Portable
Impedance/LCR Meter
MODEL 253
Instruction Manual
PN# 253-840
Publication Date: February 2020
Rev. N
NOTE: This User's Manual was as current as possible when this product was manufactured. However,
products are constantly being updated and improved. To ensure you have the latest documentation,
refer to www.tegam.com.
10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • sales@tegam.com

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  • Page 1 NOTE: This User’s Manual was as current as possible when this product was manufactured. However, products are constantly being updated and improved. To ensure you have the latest documentation, refer to www.tegam.com. 10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • sales@tegam.com...
  • Page 2 10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • sales@tegam.com...

  • Page 3: Table Of Contents

    4.1.1 Power Supply Check ................4-2 4.1.2 Oscillator Adjust ................4-2 4.1.3 L, C, R, G Alignment ................4-2 4.1.4 Dissipation Factor (D) Alignment ............4-3 10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • sales@tegam.com...
  • Page 4 INSTRUCTIONS WITHIN THIS MANUAL ARE FOR USE BY QUALIFIED SERVICE PERSONNEL ONLY. TO AVOID ELECTRICAL SHOCK, DO NOT ATTEMPT ANY SERVICING OTHER THAN THAT CONTAINED IN THE OPERATION INSTRUCTIONS UNLESS YOU ARE QUALIFIED TO DO SO. 10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • sales@tegam.com...

  • Page 5: Description

    3½ digit LED readout. Excellent reliability of the Model 253 Impedance/LCR Meter is assured through use of solid-state devices and etched circuit board construction.

  • Page 6: Specifications

    �������� ���� ���� ���� & ���� ℎ ���� �������������������� ���� ���� 200.0 µ����) ±0.35 µF 100 µF ± 0.35 = ( 100.35 − 99.65 ) µF So the limits are, 10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • sales@tegam.com...
  • Page 7 110 V: 1/16 A 250 VAC 3AG Slow-Blow TEGAM Part No. # 8952 220 V: 1/20 A 250 VAC 5x20 mm Slow-Blow TEGAM Part no. # 53327 * denotes that carrier adapter (TEGAM Part No. # 45965) is needed to use a 5x20 mm fuse For model 253/SP2598, 110 V: 1/8 A 250 VAC Slow-Blow TEGAM Part No.

  • Page 8: Operation

    Each range, 0 – 7, can be individually selected or the AUTO position puts the instrument in auto ranging mode. 6. Display A 3½ digit readout for all functions. 10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • sales@tegam.com...
  • Page 9 (kilohms), Ω (ohms), (siemens), mS (millisiemens), µS (microsiemens) and D (dissipation factor). 8. Tilt-stand Handle Aids portability; tilts instrument for easier viewing of the LED display. 10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • sales@tegam.com...

  • Page 10: Rear Panel

    3. Fuse 110 V: 1/16 A 250 VAC 3AG Slow-Blow TEGAM Part No. # 8952 220 V: 1/20 A 250 VAC 5x20 mm Slow-Blow TEGAM Part No. # 53327 For model 253/SP2598, 110 V: 1/8 A 250 VAC Slow-Blow TEGAM Part No. # 50028 220 V: 1/16 A 250 VAC 3AG Slow-Blow TEGAM Part No.

  • Page 11: Operating Procedure

    Before turning the power ON, make sure the instrument is set to the proper line voltage. The Model 253 Impedance/LCR Meter contains an internal slide switch to select the nominal line voltage (see Figure 2-3). In its up position, the switch selects 100 to 125 VAC, 50/60 Hz operation.

  • Page 12: Applying Power

    L and R modes. 2.2.3 Connection to Unknowns The KELVIN KLIP® test lead set (TEGAM Part No. # CA-162-36) is plugged into the 253’s front panel UNKNOWN connector. The test leads connector cover is spring-locking and should be squeezed together before inserting or removing.
  • Page 13 For connection to three terminal unknowns (the third connection is to ground), a ground wire must be added to the test lead set. This wire is connected as in Figure 2-5. Figure 2-5 10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • sales@tegam.com...

  • Page 14: Test Fixture Compensation

    The Model 253 uses a 3.3 pF capacitor (C6 in Figure 2-6) to compensate for the capacitance of the test leads. If the 253 is used with a test fixture, the larger capacitance of the fixture must also be compensated for. There are two methods for compensating this larger capacitance. The first method is to make a zero capacitance measurement with the test fixture connected.

  • Page 15: Function Selection

    OPERATION 2.2.4 Function Selection Model 253 Impedance/LCR Meter is designed to measure series inductance (L), parallel capacitance (C), series resistance (R), parallel conductance (G), and dissipation factor (D) of inductance and capacitance. One of these measurement modes is selected by depressing the proper front panel button.
  • Page 16 Inductor that resonates below 1 kHz will measure as though it were a capacitor. • A diode requires bias voltage (a negative reading may appear if bias voltage is not applied). 10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • sales@tegam.com...
  • Page 17 (R or G). In moving to the next lower range, the reactive component becomes too large for the lower range causing overload and a blanked display. Example: while measuring a 0.82 µF capacitor using the 2 µF range, the 253 display reads: Switching to the conductance (G) mode, the display may read: 10 TEGAM WAY •...

  • Page 18: Range Selection

    The AUTO position automatically selects the lowest corresponding range to give the highest resolution display. Figure 2–7. Range Chart 10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • sales@tegam.com 2-11...

  • Page 19: Summary Of Operation

    To measure the dissipation factor of a capacitor or inductor, push and hold the D button while the C or L function is selected. 10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • sales@tegam.com 2-12...

  • Page 20: Measurement Techniques

    Always maintain the physical orientation of the leads or terminals after checking for zero capacitance. Subtract zero- capacitance reading from the capacitance reading for the unknown. 10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • sales@tegam.com 2-13...
  • Page 21 ������������ 120 �������� ������������������������ ���� ���� ���� �������� Where: D = dissipation factor Rs = equivalent series resistance reading in counts Ls = series inductance in counts 10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • sales@tegam.com 2-14...
  • Page 22 Cp and D values of the capacitor. To locate the Cs value, find the measured D value along the horizontal axis of the graph. (The D reading from the Model 253 will be a Dissipation Factor value not a Percent Dissipation value.) Move up the graph to the B curve and read the corresponding value on the right-hand vertical axis.

  • Page 23: Inductance Measurements

    Assembly will add about 0.5 µH to Ls and 0 mΩ to Rs. Short the tests leads together and subtract the reading from the unknown inductance measured. Measuring leakage inductance of transformer windings is an easy task for the Model 253 since there are no “false nulls” as found in manually-balanced bridges.

  • Page 24: Determining Dissipation Factor (D) Of Capacitors Using Nomograph

    2.3.5 Determining Dissipation Factor (D) of Capacitors Using Nomograph Model 253 will measure dissipation factor up to 1.999. For D values greater than 2 the nomograph should be used. Measure the capacitance of the unknown and record the readout display in digits only;...
  • Page 25 OPERATION 10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • sales@tegam.com 2-18...

  • Page 26: Using The Bias Feature

    0.1 A maximum. With no bias supply connected, the rear-panel + and – terminals must be strapped together. Figure 2-9. Rear Panel 10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • sales@tegam.com 2-19...
  • Page 27 OPERATION 10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • sales@tegam.com 2-20...

  • Page 28: Signal Output Terminals

    OPERATION 2.3.7 Signal Output Terminals Terminals are provided on the Model 253’s rear panel for connecting external devices: digital voltmeters to increase full-scale resolution or simultaneous D reading; chart recorders to evaluate unknowns with changing impedances; limits comparators for HI, LO, GO, and HI D component sorting.
  • Page 29 This offset can be corrected by making a reading with the unknown connected only to the red clips and subtracting it from the final measured capacitance. To return to normal ungrounded measurements reverse the above procedures 10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • sales@tegam.com 2-22...

  • Page 30: Measuring Battery Impedance

    OPERATION 2.3.9 Measuring Battery Impedance Current producing capabilities of a battery can be determined by using the 253 to measure its impedance. Series resistance and series capacitance measurements can be made on batteries with voltages up to 50 V. To measure series resistance: 1.
  • Page 31 Cs = series capacitance in farads Ls = series inductance in henrys Care must be taken so the measurement current level of the 253’s internal source does not exceed the rating of the battery being tested. See Table 1-1 for range test currents.

  • Page 32: Circuit Description

    PSD will measure Rs, the component in phase (0°) with the RVG, and Ls, the component at quadrature (90°). The selected detector output is then fed to the A/D Converter which has a readout of 1000 counts/volt. 10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • sales@tegam.com...
  • Page 33 Cp) and presents a voltage proportional to D to the A/D Converter. Analog output voltages are available at the rear of Model 253 for the selected function (L, C, R or G) and simultaneous D (for L or C unknowns).

  • Page 34: Maintenance

    DESCRIBED IN THIS MANUAL ARE TO BE PERFORMED BY QUALIFIED SERVICE PERSONNEL ONLY. 4.1 CALIBRATION PROCEDURE Although Model 253 is inherently stable, good maintenance practices suggest it be calibrated every six months; more often if used in extreme environments or if inaccurate readings are suspected. Equipment Required...

  • Page 35: Power Supply Check

    8. L, C FULL SCALE TRIM. Setup – Press C function button and set RANGE switch to 200 nF. Connect 100 nF (± 0.05%) standard to the unknown test leads. Adjustment – Set trimmer N for front panel reading of 1000. 10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • sales@tegam.com...

  • Page 36: Dissipation Factor (D) Alignment

    Adjustment – Adjust trimmer A for a display equal to, or –1 count from the zero inductance value noted when the Kelvin Klips were shorted together. 10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • sales@tegam.com...

  • Page 37: Maintenance

    MAINTENANCE 10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • sales@tegam.com...

  • Page 38: Preventive Maintenance

    Overheating usually indicates other trouble in the instrument. It is important that the cause of overheating be corrected to prevent recurrence of the damage. 10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • sales@tegam.com...

  • Page 39: Preparation For Calibration Or Repair Service

    TEGAM for service. Before sending a unit in for service, an RMA, (Returned Material Authorization), number must be assigned to your instrument. You can contact TEGAM customer service via the TEGAM website, www.tegam.com...
  • Page 40 When is the problem most frequent?, Has anything changed with the application since the last time the instrument was used?, etc. 10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • sales@tegam.com...

  • Page 41: Warranty

    MAINTENANCE 4.4 Warranty TEGAM, Inc. warrants this product to be free from defects in material and workmanship for a period of one year from the date of shipment. During this warranty period, if a product proves to be defective, TEGAM Inc., at its option, will either repair the defective product without charge for parts and labor, or exchange any product that proves to be defective.
  • Page 42 Standards and Technology through equipment, which is calibrated at planned intervals by comparison to certified standards maintained in the laboratories of TEGAM Inc. Contact Information: TEGAM INC. 10 TEGAM WAY GENEVA, OHIO 44041 CAGE Code: 49374 WEB: http://www.tegam.com 10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • sales@tegam.com...
  • Page 43 253/SP2598 General Purpose, Portable Impedance/LCR Meter (With Battery option) MODEL 253/SP2598 Appendix A 10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • sales@tegam.com...
  • Page 44 TABLE OF CONTENTS TABLE OF CONTENTS Instrument Description ................A-1 Performance Specifications ...............A-2 Battery Removal/Replacement ..............A-3 10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • sales@tegam.com...

  • Page 45: Instrument Description

    The Model 253/SP2598 is a battery powered model 253 Digital Impedance/LCR meter. A rechargeable battery pack has been added to enhance the portability feature of the model 253. Basic instrument operation remains unchanged, and the specifications listed in the instruction manual are valid.

  • Page 46: Performance Specifications

    100 to 125 VAC / 200 to 250 VAC, 50/60 Hz, 4 W or battery power Fuses: +5 V battery supply 3 A @ 32 V, AGW, Fast Blow, TEGAM Part No. # 41003 -5 V battery supply 1 A @ 32 V, 7AG, Fast Blow, TEGAM Part No. # 57696 Operating Time: Dependent of range and type of measurement.

  • Page 47: Battery Removal/Replacement

    OPERATOR SHOULD WEAR A GROUNDING WRIST WRAP WHILE PERFORMING THE BATTERY REPLACEMENT. The 253/SP2598 requires that 4 AA and 4 C size NiMH batteries be installed for battery powered operation. Follow the step by step procedure provided below to replace the batteries: Step 1.
  • Page 48 BATTERY REMOVAL/REPLACEMENT Figure 1: Rechargeable Battery Installation 10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • sales@tegam.com...
  • Page 49 253/SP2598 Contact Information: TEGAM INC. 10 TEGAM WAY GENEVA, OHIO 44041 CAGE Code: 49374 WEB: http://www.tegam.com 10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • sales@tegam.com...

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