Tonghui TH2821B Operation Manual

OPERATION MANUAL

English

February 2006

TH2821B

Portable LCR Meter

TH2821B OPERATION MANUAL

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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........................................ 8

1.4 Environment Requirements .................. 10

Chapter 2 Panel Illustration............................. 11

2.1 LCD Display Illustration ........................ 11

2.2 Keyboard Illustration ........................... 13

Chapter 3 Operation........................................ 14

3.1 Power on............................................. 14

3.2 How to operate ................................... 15

3.2.1 Key Functions ............................ 15

3.3 Battery Replacement ........................... 21

3.4 Clearing Instruction ............................. 22

Appendix......................................................... 23

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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 D

C Power Adapter 1
TH26027 4 terminal Kelvin test clip leads 1
1604A 9V battery 1

User Manual 1

Options

TH26029 SMD component test fixture

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Notes on Use

z This meter is only for indoor use.
z Turn off the TH2821B 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 TH2821B. Before you
measure a capacitor, be sure the capacitor is fully
discharged.

z Take out the battery when the meter is not in use for

more than 3 months.

z A single standard 9V battery can be used for the power

supply. TH2821B will not work normally when battery
voltage is less than 6V.

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

for TH2821B 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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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.

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

TH2821B 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.
TH2821B 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;

4． Range Hold

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

5． Equivalent Circuit Mode

Both parallel and series equivalent circuit modes can

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be obtained.

6． Data Hold

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

1.3 Specifications

Parameter L-Q, C-D, R-Q and Z-Q
Frequency 100 Hz, 120 Hz and 1 kHz

Accuracy

Basic Accuracy: 0.3%

Display

5 digits display for both primary and secondary
parameters

100 Hz,120 Hz

1 μH – 9999 H

L

1 kHz

0.1 μH – 999.9 H

100 Hz, 120Hz

1 pF – 9999 μF

C

1kHz

0.1 pF – 999.9 μF

R, |Z|

0.0001 Ω - 999.9 MΩ

D, Q 0.0001 – 9999

Measurem
ent Range

Δ%

0.0001% - 9999%

1kHz

0.3 Vrms (1±10%)

Test Level

(Range

Auto and

Open

Circuit)

100Hz
120Hz

0.3 Vrms (1±15%)

Ranging

Mode

Auto and Hold

Equivalent

Circuit

Parallel and Series

Display Direct