Tonghui TH2821A Operation Manual

TH2821A

Portable LCR Meter

OPERATION MANUAL

English

November 2005

st

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© Copyright 2005 Changzhou Tonghui Electronic Co., Ltd.

Edition Rev 1.0.0

All rights reserved.

TH2821A OPERATION MANUAL

Contents

Contents............................................................2

How to Contact Us.......................................3

Incoming Inspection.....................................4

Notes on Use ...............................................5

Warranty:....................................................6

Chapter 1 Overview............................................7

1.1 Introduction...........................................7

1.2 Main Functions.......................................7

1.3 Specifications ........................................9

1.4 Environment Requirements...................12

Chapter 2 Panel Illustration..............................13

2.1 LCD Display Illustration.........................13

2.2 Keyboard Illustration............................15

Chapter 3 Operation.........................................17

3.1 Power on.............................................17

3.2 How to operate....................................18

3.2.1 First Key Functions .....................18

3.2.2 Second Key Functions:................20

3.3 Battery recharge..................................30

3.4 Clearing Instruction..............................31

Appendix .........................................................32

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TH2821A OPERATION MANUAL

How to Contact Us

Changzhou Tonghui Electronic Co., Ltd.

Address: No. 3, Tianshan Road, New District,

Changzhou, Jiangsu, China

Tel: [phone]
Fax: [phone]

http://www.tonghui.com.cn
http://www.tonghui.cn
Email: [e-mail]

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TH2821A OPERATION MANUAL

Incoming Inspection

Inspect the shipping container for damage. The contents of
the shipment should be listed as follows. If the contents are
incomplete, if there is damage or defect, please contact
our company or your nearest Sales and Service Office.

Accessories

TH26028 DC Power Adapter 1
TH26027 4 terminal Kelvin test clip leads 1
LH-200H7C rechargeable battery (inside) 1

User Manual 1
Options

TH26029 SMD component test fixture

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TH2821A OPERATION MANUAL

Notes on Use

z This meter is only for indoor use.
z Turn off the TH2821A while switching the power supply

between battery and DC adapter or replacing the
battery.

z Although internal circuit protection is provided, DC

voltage or current may damage TH2821A. Before you
measure a capacitor, be sure the capacitor is fully
discharged.

z Charging may disturb measurement result sometimes.
z Nickel Metal Hydride rechargeable battery can be used

for the power supply. TH2821A will not work normally
when battery voltage is less than 6V.

z The 12V AC to DC adaptor is recommended to be used

for TH2821A power supply.

z Perform Open and Short corrections for accurate

measurement especially when test fixture is changed.

z The functions locked with password are not accessible

by users.

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TH2821A OPERATION MANUAL

Warranty:

This instrument product is warranted against defects in
material and workmanship for a period of two years from
the date of shipment. During the warranty period, Our
company will, at its option, either repair or replace
products which prove to be defective. For warranty service
or repair, this product must be returned to a service facility
designated by our company.

Warranty limitation

The foregoing warranty shall not apply to defects resulting
from improper or inadequate maintenance by Buyer,
Buyer-supplied software or interfacing, unauthorized
modification or misuse, or improper site preparation or
maintenance.

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Chapter 1 Overview

Thank you for purchasing our product. To get the maximum
performance from the instrument, please read this manual
first, and keep this manual at hand.

1.1 Introduction

TH2821A is a microprocessor-controlled portable meter with
low power consumption. It can measure six basic parameters,
they are inductance L, capacitance C, resistance R,
impedance |Z|, dissipation factor D and quality factor Q.
TH2821A can fulfill the measurement needs of various
component manufacturers and maintenance technicians.

1.2 Main Functions

1． Test Parameter

L-Q, C-D, R-Q and Z-Q.

2． Correction

OPEN: multi-frequency correction of open circuit;
SHORT: multi-frequency correction of short circuit.

3． Display Mode

Direct —— direct measurement value;

∆ —— absolute deviation;
∆% —— percent deviation.

4． Range Hold

When measuring a large number of components with
the same nominal value, this function can effectively
improve the measuring rate.

TH2821A OPERATION MANUAL

5． Comparator Function

Built-in 4 Bins comparator: NG, P1, P2 and P3.

6． Equivalent Circuit Mode

Both parallel and series equivalent circuit modes can
be obtained.

7． Data Hold

This function can be used to freeze the current display
value.

8． Alarm Mode

NG, P1, P2, P3 and OFF modes can be selected.

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TH2821A OPERATION MANUAL

1.3 Specifications

Parameter L-Q, C-D, R-Q and Z-Q

Frequency 100 Hz, 120 Hz , 1 kHz and 10 kHz

Accuracy

Display

Measurement

Range

Test Level

(Range Auto

and Open

Circuit)

Ranging Mode Auto and Hold

Basic Accuracy: 0.3%
5 digits display for both primary and secondary

parameters

100 Hz,120 Hz

L

1 kHz,10 kHz
100 Hz, 120Hz

C

1kHz,10 kHz

R, |Z|

D, Q 0.0001 – 9999

10kHz
120Hz

1kHz

100Hz

0.0001 Ω - 999.9 MΩ

0.0001% - 9999%

∆%

0.1 Vrms (1±15%)

0.3 Vrms (1±15%)

0.42 Vrms (1±15%)

1 µH – 9999 H

0.1 µH – 999.9 H
1 pF – 9999 µF

0.1 pF – 999.9 µF

Equivalent

Circuit

Display

Correction Open and Short Zeroing

Rate Approx. 3 meas/sec

Termina ls 5 terminals

Parallel and Series

Direct, ∆ABS and ∆%

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TH2821A OPERATION MANUAL

Comparator

Limit Setup

Range

Alarm Mode NG, P1, P2, P3 and OFF

Power Supply

4 Bins：NG, P1, P2 and P3

-9999% - 99999%

∆%

L
C

Nominal

9V rechargeable battery or DC12V(100 mA)
adapter

R
Z

(Continued)

0.0001 µH – 99999 H

0.0001 pF – 99999 µF

0.0001 Ω - 99999 MΩ

0.0001 Ω - 99999 MΩ

Low Battery

Indication

Power

Consumption

Auto Power

Off time

Weight Approx. 400 g

Dimensions 200mm(L) × 95mm(W) × 40mm(D)

Approx. 6V

Normal: Approx. 25 mA
Auto power-off: Approx. 500 nA

Approx. 5 minutes

Table 1-1 Specifications

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