Tegam 253 Manuel utilisateur

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

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

253

10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • s[email protected]

III

TABLE OF CONTENTS

DESCRIPTION

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CIRCUIT DESCRIPTION

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4 MAINTENANCE

4.1 CALIBRATION PROCEDURE........................................................................... 4-

4.1.1 Power Supply Check .......................................................................... 4-

4.1.2 Oscillator Adjust................................................................................ 4-

4.1.3 L, C, R, G Alignment .......................................................................... 4-

4.1.4 Dissipation Factor (D) Alignment ......................................................... 4-

10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • s[email protected]

TABLE OF CONTENTS

TABLE OF CONTENTS (continued)

4.2 MAINTENANCE ........................................................................................... 4-5

4.2.1 Preventive Maintenance...................................................................... 4-

4.2.1.1 Cleaning........................................................................................ 4-

4.2.1.2 Visual Inspection ............................................................................ 4-

4.3 PREPARATION FOR CALIBRATION OR REPAIR SERVICE .................................... 4-

4.4 WARRANTY ................................................................................................ 4-

Appendix A (for 253/SP2598)

Instrument Description ........................................................................... A-1

Performance Specifications ...................................................................... A-2

Battery Removal/Replacement ................................................................. A-3

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10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • s[email protected]

1-1

DESCRIPTION

SECTION 1

DESCRIPTION

1.1 INTRODUCTION

Model 253 Digital Impedance/LCR Meter is a semi-automatic instrument which permits rapid

measurement of inductance (L), capacitance (C), resistance (R), conductance (G) and dissipation

factor (D) at a test frequency of 1 kHz. Measurement accuracy and versatility satisfies most

demanding engineering or scientific applications.

To operate, merely push the button for the desired function, manually turn the knob to the

desired range, and connect the unknown. KELVIN KLIPS® test leads are included, thus ensuring

true four-terminal connections. The position of the range switch, used in conjunction with the

desired function button and front panel range scale, indicate the unit of measurement being

displayed by the 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. Its small size is ideal for use on bench tops

where work space may be at a premium. The carrying handle tilts the unit to a convenient

viewing angle. Rear panel brackets provide line cord storage and enable it to be operated in a

vertical position.

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1-2

DESCRIPTION

1.2 SPECIFICATIONS

Ranges

Full Scale

Values

200 µH

2 mH

20 mH

200 mH

2 H

20 H

200 H

200 pF

2 nF

20 nF

200 nF

2 µF

20 µF

200 µF

2000 µF

2 Ω

20 Ω

200 Ω

2000 Ω

20 kΩ

200 kΩ

2000 kΩ

2 µS

20 µS

200 µS

2000 µS

20 mS

200 mS

2000 mS

20 S

1.999

Accuracy

(15°C to 35°C)

±(0.25% +

(1+0.002Rs*)

digits)**

±(0.25% + (1+0.001R

*) digits)

±(0.25% +

(1+0.010Rs*)

digits)

±(0.25% +

(1+0.010Rs*)

digits)

±(0.25% +

(1+0.002Gp*)

digits)**

±(0.25% + (1+0.001G

*) digits)

±(0.25% +

(1+0.010Gp*)

digits)

±(0.5% +

(1+0.004Gp*)

digits)

±(0.25% +

(1+0.002Ls*)

digits)

±(0.25% + (1+0.001L

*) digits)

±(0.25% +

(1+0.010Ls*)

digits)

±(0.25% +

(1+0.010Ls*)

digits)

±(0.25% +

(1+0.002Cp*)

digits)

±(0.25% + (1+0.001C

*) digits)

±(0.25% +

(1+0.010Cp*)

digits)

±(0.5% +

(1+0.004Cp*)

digits)

±(1%+0.002) for L or C ≥ 200 counts

±(2%+0.010) for L or C 50 to 199 counts

±(2%+0.10)

Test

Signal

Voltage

Cp, Gp

1.0 V

RMS

0.1 V

RMS

0.01 V

RMS

Current

Ls, Rs

100 mA

10 mA

1 mA

100 µA

10 µA

1 µA

*Digit Count, same range.

** After correction for test lead zero reading.

0 °C to 15 °C and 35 °C to 50 °C : add 0.1(rated accuracy)/°C

Table 1-1. Model 253 Specifications

Sample calculation:

Lets find the accuracy for 100 µF capacitor.

From the above table, the accuracy formula is ±[0.25% + (1 + 0.010Gp)digits]

=±[(.

 x 100 x 10) + (1 + 0.010(1 x 10))digits]

(  = 1 µ)

=±[0.25 µF + 1 digit]

(1 0.1 µ 3 

& 200.0 µ)

=±0.35 µF

So the limits are,100 µF ± 0.35 =(100.35 99.65)µF

10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • s[email protected]

1-3

DESCRIPTION

Test Frequency: 1 kHz ± 1%.

Unknown Excitation: The 1 kHz voltage (Vx) and current (Ix) levels listed in Table 1-1 are held

constant by an internal amplitude control circuit.

Measurement Rate: Four per second; one second is required for first reading after connecting

unknown to terminals.

Measurement Display: 3½ digit LED with decimal point. Blanked for overload conditions.

Unit Display: Unit of mesurement being displayed by the LED readout is indicated by

position of the range switch, used in conjunction with the desired function

button and the front panel range scale.

External Bias: Rear panel terminals are provided for connection of external supply. 0 V to

50 VDC, 0.1 A maximum. (Read Section 2.3.6 before using external bias.)

Static Charge Protection: Diode and resistor discharge network.

Connection to Unknown: Four-terminal, shielded, connections are provided by the KELVIN KLIPS®

cable assembly (TEGAM Part No. #CA-162-36) supplied with the Model 253.

Outputs: Analog signals of 1 V per 1,000 counts, 1 kΩ source resistance is available

at rear panel.

L, C, R, or G, with simultaneous output of D for L or C.

Power Consumption: 4 W typical.

Power Requirements: 100 to 125 VAC or 200 to 250 VAC, 50/60 Hz.

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

* 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. # 50028

220 V: 1/16 A 250 VAC 3AG Slow-Blow TEGAM Part No. # 8952

Size: Height (with feet) – 100 mm (4 in.)

Width – 260 mm (10 in.)

Depth (overall) – 370 mm (14.6 in.)

Weight: 3.2 kg (7 lb.)

Accessories supplied with Model 253: TEGAM Part No.

KELVIN KLIPS® Four-Terminal Clips CA-162-36

Instruction Manual 253-840

Socket, 0.062” Crimp, Molex 02-06-5106 062-261

Pin, 0.062” Crimp, Molex 02-06-6103 062-263

Options Available: TEGAM Part No.

4-Terminal Kelvin Chip Tweezers 2005B/SP5132

Kelvin Klip replacement kit KK100

Front Panel Dust Cover 43374

Chip Tweezer Rebuild Kit 47422

10 TEGAM WAY • GENEVA, OHIO 44041 • 440-466-6100 • FAX 440-466-6110 • s[email protected]

2-1

OPERATION

SECTION 2

OPERATION

2.1 CONTROLS AND CONNECTORS

2.1.1 Front Panel

Figure 2-1. Model 253 Front Panel

1. ON/OFF Switch A push-on, push-off switch for applying and removing power from the

instrument.

2. UNKNOWN Connector Terminals designed to be used with KELVIN KLIPS® test leads

(TEGAM Part No. # CA-162-36), provided with Model 253, to provide

a true four-terminal connection to the unknown or test fixture.

3. L, R, C, and G Pushbuttons Function pushbuttons select the type of meter circuit that will

measure series inductance (L) and resistance (R) or parallel

capacitance (C) and conductance (G).

4. D Pushbutton The push-to-read D (dissipation factor) pushbutton displays the D of a

capacitor or inductor when the C or L function is selected.

5. Range Switch Selects the decimal multiplier and units of measurement for the meter

circuit being used. 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 • s[email protected]

2-2

OPERATION

7. Units Indicators Front panel LED lamps indicate the units of measurement. The basic

multipliers and units are: H (henrys), mH (millihenrys), µH

(microhenrys), nF (nanofarads), kΩ (kilohms), Ω (ohms), S

(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 • s[email protected]

2-3

OPERATION

2.1.2 Rear Panel

Figure 2-2. Model 253 Rear Panel

1. Bias Terminals Allows application of a 2 V to 50 VDC, 0.1 A maximum bias to the capacitor

being measured. (The shorting bar must be in place when not using bias

feature.) See Section 2.3.6 before using external bias.

2. Output Terminals Provides two analog signals proporational to the function selected (L, R, C, or

G) and D (for L and C). These terminals can be used with external DVM’s (for

increased full scale readings or resolution capability), with chart recorders, or

with limits comparators.

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. # 8952

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