Tonghui TH2822, TH2822C, TH2822A Instruction Manual

Model

Dual Handheld LCR Meter

TH2822/TH2822A/TH2822C

Instruction Manual

1

Safety Summary

The following safety precautions are
applicable to both operating and
maintenance personnel and must be
observed during all phases of operation,
service, and repair of this instrument.

DO NOT OPERATE IN A FLAMMABLE OR

EXPLOSIVE ATMOSPHERE

Do not operate the instrument in the
presence of much dust, direct sunlight, high
humidity, strong electromagnetic radiation,
etc.

NON-PROFESSIONALS SHUOLD NOT OPEN

THE REAR COVER

Maintaining, substituting parts or adjusting
the instrument should be made by
professional maintenance personnel. Please
contact relevant distributor or Tonghui’s
after-sale service department.

2

DO NOT RE MOVE OR MODIFY THE

INSTRUMENT

Some replacements and unauthorized
modifications might cause irreversible
damage to the instrument.

SAFETY WARNING

Strictly follow the relevant safety statements in
this manual involving safety, personnel injury,
damage to the instrument, operation and
environmental conditions causing poor test.

3

Safety Guidelines

To ensure that you use this device safely,
follow the safety guidelines listed below:



This meter is for indoor use, altitude up to

2,000 m. For short-time outdoor use,
precautions should be taken to avoid direct
sunlight, water and moisture,
electromagnetic radiation, dust and
explosion.



The warnings and safety precautions should

be read and well understood before the
instrument is used.



Use the meter only as specified in this

manual.



Confirm that the circuits have been powered

off and all capacitors in the circuits been
discharged before measuring in-circuit
components.



Discharge all charging elements, such as

capacitors, before testing.



The power for the meter is supplied with a

single standard 9V battery. But also a line
operation is possible using a power adapter

4

of 12VDC/150mA. If a power adapter is
selected, please be sure to meet the safety
requirements of a relevant IEC standard.



The battery using in TH2822C is

rechargeable. Do not charge non­rechargeable batteries.

Safety Symbols

This symbol is a warning and
indicates that the user should refer to
the operating instructions located in
the manual.

D C power

Indicates inside pin is positive (+),

outside is negative (-) .

5

Environme ntal Con diti ons

Operating Enviro nment

0 °C to 40 °C

Storage Humidity

0 – 80% R.H.

Storage Enviro nment

-20 °C to +50 °C

Pollution degree

2

6

Contents

Safety Sum ma ry ........................................................ 1

Safety Guideli n es ...................................................... 3

Introduction ............................................................... 9

Package Contents ................................................... 10

Front Panel Overvie w ............................................. 12

Front Panel Display Descriptions .................................. 13

Front Panel Buttons ...................................................... 15

Button Function Definition ............................................. 16

LCD Display Overview .................................................. 17

LCD Display Descriptions ............................................. 17

Special Display Indicators ............................................. 19

Test Port ....................................................................... 19

Powering Instrument .............................................. 21

Installing Battery ........................................................... 21

Connecting External Power Source .............................. 24

Low Battery Indication .................................................. 26

Backlight Display .......................................................... 27

Charge Display ............................................................. 28

7

Operation Instruction.............................................. 30

Data hold mode (HOLD) ............................................... 30

Data Record Mode (REC) ............................................. 31

L/C/R/Z Select Mode .................................................... 33

D/Q/θ/ESR Select Mode ............................................... 34

Test Frequency (FREQ)................................................ 34

Tolerance Mode (TOL) ................................................. 35

Auto LCR Mode ............................................................ 37

Measurement Rate (RATE) .......................................... 39

Series/parallel Equivalent Mode ................................... 39

Utility Menu (UTIL) ........................................................ 41

Clear Functions (CLEAR) ............................................. 52

Remote Control (RMT) ................................................. 56

Fuse Detection .............................................................. 56

Quick Start Guide .................................................... 58

CAUTION...................................................................... 58

Inductance Measurement ............................................. 59

Capacitance Measurement ........................................... 62

Resistance Measurement ............................................. 64

Impedance Measurement ............................................. 66

Remote Communicati o n ......................................... 67

8

Connecting Instrument to PC ........................................ 67

Virtual Serial Port Configuration .................................... 68

RMT Operation ............................................................. 69

Command Protocols ..................................................... 71

Command Reference .................................................... 77

Specifications .......................................................... 84

General Specifications .................................................. 84

Accuracy Specifications ................................................ 87

Maintenance ............................................................ 94

Service .......................................................................... 94

Cleaning........................................................................ 95

Limited Warranty ..................................................... 96

9

Introduction

TH2822 series are des i gn e d f or m eas uring ind uct ance ,
capacitance and resistance components. The
instrument can be powered by a 9V battery or external
power adapter. The meter is not only applicable to the
application occasion of bench meters but also
conveniently used in the flow inspect and handheld
measurement occasions.

TH2822 series provide the primary parameter of up to
40,000 readings, secondary parameter of 0.0001
reading resolution, the maximum measuring
frequency of up to 100kHz, constant internal

resistance of 100Ω and testing level of 0.6Vrms. The
auto range can rapidly display the measuring results

and automatically choose the desirable testing
parameter s in ac c ordanc e with c omponents pr oper t ies .
Its measuring accuracy is up to 0.25%.

Front panel push buttons maximize the convenience
of function and feature selection such frequency, rate
and L/C/R/Z selection. Tolerance mode can sort
components, record mode aid to capture readings,
convenient open/short clear function improve the
measuring accuracy, utility menu help you easily take

10

the selections of the key tone, auto power-off and
storage.

All TH2822 series are equipped with the function of
remote communication. The test data can be
transferred to PC through a Mini USB connection,
great for applications that require remote control and
data acquisition.

Package Contents

TH2822 series are equipped with the following
contents：

• TH2822/TH2822A/TH2822C handheld LCR
meter

• Instruction manual

• Mini USB Interface Cable

• Red / Black Banana plugs—Crocodile clip

Test Leads

• Short-circuit plate

• *9V Alkaline battery or 8.4 rechargeable

battery

• *AC adapter

• *TH26027A Kelv in clip tes t lea ds

• * TH26009C SMD test tweezers

11

• *TH26029C SMD test tweezers

* This can be purchased as optional accessories. All
contents are subject to actual package list or box.

Please locate them from the original packaging to
ensure nothing is missing. If in the case that an item is
missing, please contact Tonghui or relevant distributor
immediately.

12

Front Panel Overview

Figure 1 - Front Panel Display (model TH2822C shown)

1 2 3

5

6

8 4 7

13

9

10

11

12

14

13

Front Panel Display Descriptions

1. LCD display

2. USB communication / *Back light button

3. Power ON/OFF button

4. Frequency and record mode selection

5. Secondary display mode (D /Q//ESR, etc.)

6. Primary display mode (L/C/R/Z, etc.)/ auto
LCR selection

7. Rate/equivalent mode selection

8. Hold mode/ utility menu

9. Tolerance mode/ utility arrow key

10. Open/short clear/ utility arrow key

11. 5-terminal test sockets (direct measurement
on lead components or use of test fixture)

12. 3-terminal test jacks (for use of Banana plugs
—Crocodile clip Test Leads)

13. Standard mini USB port (for remote control)

14. 12VDC external power input (use with an
external power adapter)

*Backlight is not included in TH2822.

NOTE: Refer to the adapter

’

s label for input

parameters of it. Rated output parameters is 12VDC

，

150mA，4mm.

NOTE: Use with included power adapter only or

purchase the specified adapters from Tonghui. Use

14

with improper power adapters may damage
instrument.

NOTE: Internal battery supply will be
automatically cut off since the normal supply of
external power. If the battery is rechargeable
(TH2822C), the external power will charge the battery
simultaneously. TH2822C is installed an independent
charging controller---charging control is still done even
at the state of power-off.

WARNING: Before connecting an external
power adapter, b e sure that the polarity ma tches
the (+) and (-) labels as indicated inside the battery
compartment. If it is not installed correctly and
connected to an external power adapter, it might
cause severe damage to the instrument.
WARNING: If the battery is rechargeable
(TH2822C), please be sure that the polarity
matches the (+) and (-) labels as indicated inside
the battery compartment ant the battery is
rechargeable. DO NOT charge the non­rechargeable battery!

15

Front Panel Buttons

With the exception of the power button, all front panel
buttons have specific colored labels on them. They
are all marked in black, blue, or orange color. Each
color has a specific representation, as described
below:

Black—the primary function，meaning that

function will be set or configured upon pressing it.

Orange—the secondary function, it means that

the function will be set or configured if that button is
pressed and hold down for 2 seconds.

Blue—the utility function, the function will be set

or configured if the UTIL button is pressed and hold
down for a long time. See “Utility Menu” section for
details.

NOTE: In the button operational instruction, we
will use the button name to express the button
operation without differentiating the type of button;
Pay attention to the difference between “long press”
and “press”.

16

HOLD

FREQ

L/C/R/Z

/ESR

UTIL

CLEAR

RMT

P

S

TOL

RATE

AUTO

REC

D/Q/

θ

1 2 3 4

8

9 5

7 6

Figure 2 –Button Display (Model TH2822C shown)

Button Function Defi n ition

1． Power ON/OFF Button
2． Frequency/Record Mode Button
3． Remote Control/Bac klight Button
4． Readings Hold/Utility Menu Button
5． Tolerance mode/ Menu Selection Button
6． Clear/ Menu Selection Button
7． Rate/Equivalent Mode Button
8． LCR Primary Parameters/Auto LCR
9． Secondary Parameters Selection Button

17

LCD Display Overview

LCR

ESR

MAXAVGMIN

θ

Q

AUTO

D

2105%

deg
kHz
PAL

SER

μ

H

p

F

μ

RMT

Mk

TOL

DH

n

n

@

OFF

Z

%

Ω

FASTSLOW

1

2 5 9 10

12

14

16

202127

28

29

8

3

23

24

25

4

15

11

13

6 7

22

17
18

19

Ω

26

Figure 3 - LCD Indicator Display

LCD Display Descriptions

1. LCRZ – Primary display indicator

2. MAX – Maximum reading indicator in the
record mode

3. AVG – Average reading indicator in the record
mode

4. MIN – Minimum reading indicator in the record
mode

5. AUTO – Automatic LCR indicator

6. θ – Phase angle indicator for secondary
display

18

7. D – Dissipation indicator

8. Q – Quality factor indicator

9.

– Secondar y display

10.

– Beeper tone indicator for tolerance

mode

11. deg – Phase angle (θ) units indicator

12. Ω – ESR(ohm) units indicator

13. % - Percentage indicator (in tolerance mode)

14. kHz – Frequency units indicator

15. PAL – Parallel mode indicator

16. SER – Series mode indicator

17.

– Inductance units (L) indicator

18.

–Capacitance units (C) indicator

19. MkΩ – Resistance(R) /impedance units
indicator

20. RMT – Remote mode indicator

21.

– Primary display

22. ESR – Series mode indicator for secondary
parameters

23. DH – Data hold indicator

24. SLOW – measuring rate indicator

25. 2105% - Limits indicator in tolerance mode

26. FAST- Fast measuring rate indicator

27.

– Low battery/charging indicator

28. @OFF –Auto power-off indicator

19

29. TOL –Tolerance mode indicator

Special Display Indicators

Indicates short clear if you press the

CLEAR button

Indicates open clear if you press the

CLEAR button

Error indication

Indicates correction (open/short clear)

mode

Indicates damaged or open fuse

AD converter error（UNK）

AD converter error（END）

Test Port

TH2822 series are creatively designed to combine 3­terminal port and 5-terminal port, which makes the

20

convenient test and highly accurate test realized in the
instrument.

+ -

!

H

CUR

L

CUR

H

POT

L

POT

1 2 3

Figure 4- test port

With the adoption of standard banana slots, the
instrument can use inexpensive banana plug­crocodile clip as the test lead, which make the test
quite convenient. However this configuration has low
testing accuracy.
For the improvement of accuracy when using external
testing leads, TH2822 series are designed with 5­terminal testing slots and exclusive test fixture to
ensure complete external 4-terminal test and
measuring accuracy.

5-terminal

test slot

3-terminal

test port

1-Hight

Terminal
2-Low
Terminal
3-Guard

Terminal

21

NOTE: TH26027A, TH26009C, TH 260 29C 4-terminal
test fixtures are optional for TH2822 series. Please
refer to relevant instrument accessories.

Powering Instrument

There are two methods to supply the instrument:
Battery and external power adapter. When the two
power modes are available, the external DC adapter
is prior to the battery. The two power modes can be
automatical l y switche d with out inter ru pti on.

Installing Battery

TH2822 series can adopt battery for power supply so
that you can take measurements whenever and
wherever without many preparations.

9V alkaline batteries used in TH2822/TH2822A are
non-rechargeable. Reference standard type is
IEC6LR61.

22

TH2822C applies 8.4V rechargeable battery with
LH-200H7C as the reference type. Do not use non­rechargeab le batteries with the exception o f
emergency cases. The reason is that the charging
circuit will operate once the instrument is
connected to external power.

To Install the Battery:

1． Open up the back-flip stand, and locate the

screw that tightens the battery compartment
cover as indicated in Figure 5. Use a
screwdriver to unscrew and remove the cover.

2． Insert proper battery into compartment. Note

the positive (+) and negative (-) terminals as
indicated inside the battery compartment
(See Figure 6). Be sure to insert the battery
with matching polarity.

3． Place the battery compartment cover piece

by sliding it into the top slid first. Place screw
at the bottom of the cover piece and tighten
down with a screw driver.

4． Push and hold down the power ON/OFF

button for 2 seconds to turn on the instrument.

23

Figure 5- Back Cover

24

Connecting External Power Source

Some models of TH2822 series are equipped with
standard external power adapters, which can use
external source.

WARNING: Use the included or specified adapter
only. Confirm p o wer p arameters be ones that
adapters require before use.

Figure 6- Battery Compartment

25

To connect the adapter, do the following:

1. If a battery is installed, please check the
battery compartment again that the polarity of
the battery matches the polarity as indicated
by the labels inside the compartment.

WARNING: DO NOT, at any tim e, connect an
external power adapter when a battery is installed
incorrectly or a non-rechargeable battery is
inserted in a rechargeable instrument. Doing so
will damage the in strument and void its warranty.

2. Confirm that an appropriate power supply
connects to the adapter.

3. Connect the AC adapter connector into the
right side jack of 12VDC.

4. Connect the AC Adapter socket into an
electrical outlet.

5. Press and hold down the power button for
about 2s to turn on the meter.

26

NOTE: The meter will automatically switch to
consume power from the AC adapter instead of the
battery when an AC adapter is plugged in and
consume the power normally. In this event, if the
battery insta lled c orrect ly is rec hargeab le (for inst ance,
TH2822C), charging controller will be driven at the
same time no matter the instrument is on or off.

Low Battery Ind ication

At the use of battery for power supply, if the display
starts flashing the

indicator, it means that the
battery voltage is below normal working voltage
(below 6.8V). It is highly recommended that the
battery be replaced as soon as possible before

12VDC Input

AC Adapter

Figure 7-Connecting AC Adapter to Meter

27

continuing operation. See “Instal lin g Batt er y” for
instructions.

If the battery is rechargeable, when the

indicator
starts flashing, please charge the battery before
continuing operation. When the external source is

plugged in, the flash of

indicator indicates the

charging state.

Backlight Display

Only TH2822A/C meters have Backlight display that
can allow you to see the LCD display in dark
conditions, TH2822 doesn’t support backlight.

To turn on the back light, you should press the 
button for a long time.
To turn off the back light, you should press the 
button for a long time.

When Using Battery Power

When the meter is powered by using battery, the
brightness of the back light will automatically decrease
to conserve battery power. When the back light have
lightened for about 15 seconds, the brightness will
continuously decrease; and when the back light have

28

lightened for approximate 30 seconds, the back light
will automatic all y turn of f .

When Using Exter n al Power

When the meter is powered using an external AC
adapter, once the back light is turned on, it will stay at
its maximum brightness continuously and will not
automatical l y turn off . Unplugg ing the ex ter na l po wer
to use battery power, the back light will decrease its
brightness and automatically turn off.

Charge Display

The power circuit of TH2822/A is non-rechargeable.
When the external power adapter is plugged in, the
power mode will automatically switched and the
battery power circuit will be cut off.
TH2822C is equipped with rec har gea ble circuit. When
the external power adapter is connected, the built-in
rechargeable battery will be charged automaticall y
and the power mode will be switched to external
power supply.
Single charge circle is about 80 minutes and charge
current is approximate 40mA. If a battery is full
charged, the charge wi ll be automaticall y shut off ;

29

instead, the battery will be charged again after a
charge circle.

NOTE: A new charge circle will begin as soon as an
external power is connected.

WARNING: If the instrument has rechargeable
circuit, DO NOT connect to an external power
when a non-rechargeable battery is installed.
Doing so will cause the burst of the battery.

： It indicates low power of battery if not

connect to external power; if instrument is
connected to external power, it means the
charging state.

30

Operation Instruction

Data hold mode (HOLD)

The data hold function allows the user to freeze the
display data. The data displayed on LCD will not
update upon the phase of test until data hold is turned
off.

Turn On Data Hold

To use data hold, press the HOLD button. The “DH”
indicator will display on the screen when data hold is
active. At this moment, primary and secondary
displayed on LCD are the testing results before the
press of HOLD button.

Turn Off Data Hold

To disable the data hold, press the HOLD button
again. The “DH” indicator wil l disappear on the scr een,
and meter will remain in normal operation mode.

31

Data Record Mode (REC)

If the data stability of tested components is poor and
the data fluctuates in a range, data record mode can
aid the reading of data.
This mode is used for dynamically recording
maximum, minimum, and average values in a range.

Enable Static Recording

Press and hold down the REC button for a long time
to enter the data recording mode. The display should
indicate “MAX AVG MIN” simultaneously, which
indicates the meter is in static recording mode.

Using Static Recording

There are four different modes that can be selected in
static recording. Per press of the REC button (in
recording mode, FREQ will disable), the modes will
change and repeat in the following order:

Recording Mode

Maximum Mode Minimum

Mode

Average Mode

32

Recording Stat e

This is the default mode when enabling static
recording. In this mode, LCD will display “MAX AVG
MIN” indicator. In a relatively stable range of test data,
a beep tone will sound once a recording has been
stored.

NOTE: When the data fluctuation range is upwards of
1%, data record will dynamically be refreshed.

Maximum Display

Press REC button until the “MAX” indicator is shown
on display. This indicates that the value in the primary
display represents the recorded maximum value.

Minimum Display

Press REC button until the “MIN” indicator is shown
on display. This indicates that the value in the primary
display represents the recorded minimum value.

33

Average Display

Press REC button until the “AVG” indicator is shown
on display. This indicates that the value in the primary
display represents the recorded average value.

Disable Static R eco rding

To exit this mode, press and hold the REC button for
a long time. All the “MAX”, “MIN”, or “AVG” indicator
will disappear on LCD.

NOTE: Changing the type of test parameters will
automatically turn off static recording.

L/C/R/Z Select Mode

To select measurement mode, you should select
primary parameter first.
Each press of the L/C/R/Z button, the parameter will
change and repeat as the following modes:
L (inductance), C (capacitance), R (resistance), and Z
(impedance).

NOTE: After changing primary mode, secondary
display indicates the present frequency. If it is
required to display corresponding secondary
parameters, press the secondary button.

34

D/Q/θ/ESR Select Mode

If necessary, press the D/Q/θ/ESR button to select
secondary parameters.
Each press of the D/Q/θ/ESR button, the following
modes will be displayed on the screen:
D (Dissipation factor), Q (Quality factor), θ (Phase
angle), and ESR (Equivalent series resistance).

Test Frequency (FREQ)

TH2822 series handheld LCR meters apply AC signal
to DUT for measurement. Frequency is among the
main parameters of AC signal. By the presence of
component’s non-ideality and distributed parameters,
the effect of distributed parameters of test port and
test lead, the test frequency used on the same
component might ca use different tes t r es ult. Therefor e,
a proper frequency should be selected before test.

Selecting Frequency

Change the test frequency, push the FREQ button. If
the secondar y displa y does not indicate t he frequ ency,
it will display the actual operating frequency when you
press FREQ. If the secondary display indicates

frequency, at each press of the FREQ button, the

35

meter will change among the following selectable
frequencies:

TH2822： 100Hz/120Hz/1kHz
TH2822A：100Hz/120Hz/1kHz/10kHz
TH2822C：100Hz/120Hz/1kHz/10kHz/100kHz

Tolerance Mode (TOL)

The tolerance mode is specifically used for
component sorting purposes. In tolerance mode,
secondary display indicates the range of percentage.
Tolerance mode, nominal value and sorting limit just
come into play on prim ar y param eters . The selec table

ranges for sorting are as follows: 1%，5%，10%，
20% (20% is not for TH2822).

When entering tolerance mode, the data indicated in
the primary display will be recorded as nominal value.
Displayed value in percent age is:

100*(Mx-Nom)/Nom%
Where, Mx is the test value displayed on the primary
display; Nom is the recorded nominal value.
The percentage value is used for sorting.

36

Use Tolerance M o d e

To use the tolerance mode as the process shown
below:

1. Select the desired primary measurement
mode by pressing L/C/R/Z button.

2. Configure the proper test frequency and
series/parallel equivalent mode.

3. Perform the operation of CLEAR appropriately
if necessary.

4. Test standard implements or components with
accurate and reliable measured value.

5. Once the desired measured reading is
displayed, press the TOL button once to store
the reading as the nom inal value. At this point,

the “TOL” will be displayed on the screen,
indicating that th e toleranc e mode is ac tivated .
A percentage m ode will be sho wn in the
secondary mode to indicate the percentage
deviation.

NOTE: Before the press of TOL button, the
primary parameter indicated on LCD in any
mode can be taken as the nominal value,
including data ho ld, MAX, MIN , AVG data
recording, etc.

6. If sorting is not necessary, you can skip this
step. If it is necessary, by pressing the TOL
button you can select the range of 1%, 5%,

37

10% or 20%, which will be sho wn on LCD
accordingly.

7. Changing test component, an audible tone will
be heard. One single “beep” or tone means
the component is within tolerance. Three
“beeps” or tone means the component is out
of tolerance.

WARNING: Be sure that the capacitor has
been fully discharged before its test, or the
instrument mig h t b e damaged.

Disable Tolerance Mode

Long press of TOL button will disable tolerance mode.

NOTE: Changing the test frequency, primary function,
or secondary function will automatically disable
tolerance mode.

Auto LCR Mode

Auto LCR function will automatically select the
correspondi ng primary and secondary parameters and
suitable series/parallel equivalent mode of L, C, R.
The selection is done by judging the impedance

38

property of component according to the test result. It
is quite convenient for the measurements of mixed
and unknown components.

Enable Auto LCR Mode

Long press of AUTO button will activate auto LCR
mode. The “AUTO” indicator on LCD indicates that
auto LCR mode is activated.
In auto LCR mode, the match of secondar y param eter
with primary parameter is shown as below:

Table1-Matching relations between primary and

secondary parameters in auto LCR mode

Primary Parameter

Secondary

Parameter

Capacitance (C)

Dissipation (D)

Inductance (L)

Quality Factor (Q)

Resistance (R)

Phase Angle (θ)

In auto LCR mode, series or parallel equivalent mode
is selected in accordance with the magnitude of
impedance. Parallel mode is selected at high
impedance and series mode at low impedance.

39

Disable Auto LCR Mode

Long press the AUTO button again will disable auto
LCR mode. In addition, this mode will not continue
through changing the primary and secondary modes,
series/parallel equivalent mode and frequency mode.
“AUTO” indicator on LCD will disapp ear when auto
LCR mode is turned off.

Measurement Rate (RATE)

There are two selectable measurement rates in this
instrument: fast and slow. The rate of fast
measurement is about 4~5times/sec and slow
measurement is approximate 1.5 times/sec. The
stability of slow measurement is higher than fast
measurement.
The fast and slow rates can be directly switched by

pressing RATE button. “FAST” indicator will be
displayed on LCD at fast rate and “SLOW” indicator at
slow rate.

Series/parallel Equivalent Mode

For the presence of non-ideality and distributed
parameters of components, actual components are
usually equivalent to combined network of ideal
components. In general, there are two simple

40

equivalent models used in LCR meters, which are
series model and parallel model.

Figure 8-Series and Parallel Equivalent Models of

Inductors and Capacitors

Appropriate equivalent modes could help to gain
better measurement results. Generally, Series mode
is better for components with low impedance (blow

100Ω)，while parallel mode for components with high
impedance (over 10kΩ). For the components with the

impedance between the two limits, equivalent mode
has little effect on the testing result.

Selecting Measur em ent Mod e

Long press P<->S button, “PAL” on LCD ind icates
parallel equivalent mode and “SER” means series
equivalent mode.

41

Default Equiva lent Mode

When select primary parameter, equivalent mode

varies with primary parameter:

For capacitors and resistors, default equivalent

mode is PAL; for inductors, is SER.

Utility Menu (UTIL)

The LCR meter has a built-in utility menu that allows
you to configure some user preferences and settings.
The buttons used to set and control the menu are

colored in blue. There are three buttons: UTIL，  ，

 . User can configure the beep tone, auto power-off
timing, store/restore power-on state, view the battery
voltage, etc.

Entering Utility Menu

Long press UTIL button wil l enter utility menu. Prim ar y
display is menu option and secondary display is the
current settings or parameters configured for the
selected option. After the entrance into utility menu,
the default menu option display will show “bEEP”.

42

Configuration and Settings

The following contents are included in the utility menu:

Table 2-Utility Menu Options and Settings

Menu Options Settings/Parameters

bEEP

ON / OFF

AoFF

5 / 15 / 30 / 60 / OFF

PuP

PrE / Set

dEF yES / NO
bAtt Battery Voltage

Uses of these menu options are as follows:
Control beep sound( bEEP)
Set auto power-off(AoFF)
Set power-up state(PuP)
Reset to default settings(dEF)
Indicate battery voltage(bAtt)

By default, press the button UTIL to change or select
a different menu option. To change the settings or
parameters, use the  and  arrow keys. For each

UTIL button press, the meter will traverse through
each menu options and will repeat itself in the
following order:

bEEP  AoFF  PuP  dEF  bAtt

43

NOTE: The change of settings has different
application effects in accordance with different exiting
mode. See “Exit Utility Menu” section (Saving and
Exiting, Exiting without Saving) for details.

Beep Sound Setup (bEEP)

The “bEEP” menu option allows the user to enable or
disable the beep sound for every key press.

NOTE: This option only disables the beep sound for
each key press. It does not affect the beep sound for
“Tolerance” mode and “Static Recording”, as well as
the “auto power-off” warning.

Use the  and  arrow keys to choose ON or OFF.
This setting will be immediately effective. But this
state will not saved if choose “Exiting without Saving”;
“Saving and Exiting” should be implemented if this
setting needs to be effective after restarting.

Default setting: ON.

Auto power-off Setup(AoFF)

The “AoFF” menu option allows the user to select the
auto power-off timer. The available timer settings are:
5min/15min/30min/60min/OFF. When the primary

44

display shows “AoFF”, push the and  arrow keys
to select the timer setting. The settings will be shown
on the secondary display as Table 3.
When AoFF is effective, this timer is always counting
continuously; when the configured time is up, the
meter will make an audible “beep” sound continuously
to remind the user of prompt auto power-off. Before
auto power-off, pressing any button will reset the timer
count.

NOTE:

Auto power-off is effective only for battery

power.

NOTE: When auto power-off is efficient, the display of

“@OFF” indicates the operation of timer.

NOTE: Auto power-off will not work temporally in TOL

mode, REC mode and RMT mode. It will be activated
after exiting of above modes.

Table 3- Auto Power-off Options

Secondary Display

Representation

5

5 minutes

15

15 minutes

30

30 minutes

60

60 minutes

OFF

Manual power off only

45

The setting will be immediately effective. But this state
will not saved if choose “Exiting without saving”;
“Saving and exiting” should be implemented if this
setting needs to be effective after restarting.

Default Setting: 5

Power-up State (PuP)

The “PuP” menu option allows user to configure
the power-up state of the LCR meter, allowing user to

restore settings saved into internal EEPROM memory
at power-up. The storable settings are as follows:

• Primary function mode (e.g. L/C/R)

• Secondary function mode (e.g. D/Q)

• State of auto LCR

• Series/para llel equ iv al ent mode

• Test frequency

• Tolerance mode

• Reference value for Tolerance mode

• Measurement rate

In the utility menu, Press the  and  arrow keys
to select “PrE” or “SEt”. PrE means to preserve the
previous setting while SEt means to save the current
parameter, that is, cover the previous data.

46

NOTE: Exiting mode decides whether to implement
SEt. At “Exiting without saving”, SEt is ineffective;
while at “Saving and Exiting”, SEt setting will be
effective.

Default Setting: PrE

Configure and Sa ve Power-up State

Procedure to configure and save po wer -up state is as
follows:

1. Before entering into the utility menu, configure
all the measurement parameters firstly, such
as frequency, primary and secondary
parameters. If the meter is currently in the
utility menu, exit first and enter into utility
menu after measuring setup.

2. Press UTIL button for a long time to enter into
utility menu.

3. Push the UTIL button to traverse through the
utility options until you see “PuP” on the
primary display.

4. In order to save the current meter settings for
power-up state into internal memory, use

47

either  or  button to change the settings
so that the secondary display shows “Set”.

5. Press the UTIL button to check whether other
desirable setups have already been set. With
all settings done, exit the menu by long press
of the UTIL button.

6. The meter has now saved all current settings
into internal memory. At next power-up, the
meter will turn on and recall the saved
settings.

NOTE: The meter allows one set of settings to be
stored into memory. Therefore, the same
procedure is used to overwrite previously stored
settings into memory.

Prevent Overwrite of Stored Settings

In the utility menu, the “PuP” option default setting is
always “PrE”. If it is required to overwrite previously
stored settings for power-up state, the option should
change to “Set”. Therefore, when entering the utility
menu, be sure not to change to “Set” to prevent
overwriting any previously stored power-up settings.

48

Reset Default Settings (dEF)

The “dEF” option is used to reset the current
measuring setup and optional settings in utility menu
to default settings. These default settings are as
below:

49

Table 4 - Instrument Default Settings

Settings Default Configuration
Primary Function C (capacitance)

Secondary Function None (frequency)
Auto LCR function Off
Equivalent Met hod SER (series)
Measurement Frequency 1kHz
Measurement Speed Slow (SLOW)
Tolerance Mode Off

Beep Sound On
Auto Power-off Timing 5 minutes

Stored Measurement
Setup

clear

Stored Utility Menu

Option

clear

50

In “dEF” option, push either  or  button to
choose “NO” or “yES”. “NO” means the instrument will
not be set back to default. “yES” indicates to reset all
settings to defau lt and to cl ear pre viousl y stor ed setup .

Default Setting: No

NOTE:

Exiting mode also dec id es whether or not to

perform “yES” function. At the use of “exiting without
saving”, “yES” is ineffective; when “saving and exiting”
is selected, restore operation will be efficient.
NOTE: In the case where “PuP” is set to “Set” and
“dEF” is set to “yES” simutaneously, the “PuP” setting
has priority over the “dEF” setting. This means the
instrument will not be set back to default upon saving
and exiting the utility menu. Instead, the power-up
settings will be stored and will be recalled upon the
next power-up of the instrument.

Indicate battery voltage(bAtt)

When menu option changes to “bAtt”, the secondary
display will indicat e battery voltage that is for
reference instead of for operational function.

51

Exit Utility Menu

There are two methods for exiting the utility menu:
Saving and Exitin g, Exiting without Saving. The
former saves all the changed settings before exiting,
and the latter exits the menu without saving any
changes.

Saving and Exiting

To save all utility menu option settings and to exit the
menu, press and hold down the UTIL button for a long
time. After this, the meter will exit the menu. Then

PuP and dEF will be performed and all settings will be
saved.
“Saving” means that corresponding settings will be
saved in the built-in non-volatile memory. Therefore,
data will not lose at the time of power-off and can be
used at the time of next power-on.

Exiting Without Saving

If user decides to exit the utility menu without saving
the optional settings, and gives up the operation of
“PuP” and “dEF”, it can be done by simply pressing

52

any front panel buttons except UTIL，  ，  and

POWER. PuP and dEF operation will be ineffective.
Settings, such as “bEEP” and “AoFF” will not be
saved in the non-volatile memory but still be
temporarily efficient before power-off.

Clear Functions (CLEAR)

There are two functions under CLEAR: Open Clear
and Short Clear. Clear can decrease the distributed
error caused by test leads, for instance, short clear
can reduce the effects of contact resistors and test
leads and open clear will minimize the influence of
distributed capacitors and resistors on testing high
impedance components.

Enter Clear Mode

For convenience, open clear and short clear are
designed to share a button. By pressing the CLEAR
button, the meter will automatically choose either

OPEN clear or SHORT clear.

53

Open Clear

First select frequency to clear and keep test clip and
test slot be open. Enter into clear by the press of

CLEAR, and a moment later the OPEN indicator will
appear on secondary display after the automatic
measurement judging. If user decides to perform open
clear, another press of CLEAR should be done.

NOTE:“----” indicator on secondary display indicates
that test terminal is out of open state and open clear
cannot be performed.

Figure 9 - Open Clear

54

Short Clear

First choose test frequency to clear and then insert a
short plate to test slot. If SMD test tweezers or test
clip is used, the short plate should short the test
terminal. Enter into clear by the press of CLEAR, and
a moment later the SHrT indicator will appear on
secondary display after the automatic measurement
judging. If user decides to perform short clear, another

press of CLEAR shou ld be done .

NOTE: “----” indicator on secondary display indicates

that test terminal is out of short state and short clear
cannot be performed.

Figure10-Short Clear

55

Quick Clear Procedure

Below is an example of steps to do open or short clear:

1． Select the primary and secondary function

mode for measurement;
2． Select test frequency;
3． Select equivalent mode;
4． Keep the test terminal open to perform open

clear;
5． Short the test terminal to perform short clear;
6． Connect DUT to start testing after clear.

NOTE:

1. Clear data is just temporarily stored in RAM,
which means that the data will loss after
power-off. Therefore, “clear”, prior to
measurement, should be first done after
power-on.

2. Clear data is stored under different frequency,
thus they will be still valid at the change of test
frequency (for instance, under the frequency
of 1kHz, the meter has been cleared; and
when the frequency is back to 1kHz, there is
no need to clear again.)

3. Clear is not concerned with test parameters
and series/parallel equivalent mode. In

56

accordance with adv anc e d impedance
network principle, the instrument performs
clear operation. Though the complex
impedance is cleared, the displayed
parameter is just one of the elements of
impedance, so it is cleare d too.

4. After a long time of continuous use, the meter
will be affected by the temperature
environment and test fixtures, test leads and
contact resistance will change. It should be
necessary to clear once more according to
specific conditions so as to meet the
requirement of accuracy.

Remote Control (RMT)

When the RMT button is used for remote
communication, please see “REMOTE
COMMUNICATION” section for details.

Fuse Detection

The meter has an internal fuse in the test signal
terminal that protects the internal components from
severely damaging the instrument. When the fuse is

57

burned out, the “FUSE” indi c ator will app ear on the
primary display and an internal “beep” will sound
continuously. In this situation, none of the function
buttons can be operated and all other meter functions
will be disabled.

Figure 11-Fuse Display

In the event that the above screen is displayed, the
instrument should be powered off. If this does not
power off the meter, remove external AC adapter if
that is used and/or remove the battery from the
battery compartment. Please contact after-sale
department of our company or appointed distributor
for the change of fuse or maintenance.

58

NOTE: Both fuse damage and none output of test
signal caused by signal source fault will make “FUSE”
alarm.

Quick Start Guide

CAUTION

• Do not measure a capacitor that is not fully
discharged. Connecting a charged or partially
charged capacitor to the input terminals will
damage the instrument.

• When measuring an on-board component within a
circuit, the circuit must be powered off before
connecting the test leads.

• When used in a dusty environment, the instrument
should be wiped and cleaned regularly. The
electrical conductivity carried by the accumulated
dust will eventua lly have an eff ect on th e use of the
meter.

59

• Do not leave the instrument exposed to explosive,
direct sun-lighting and overheating environments.

• Before removing the cover, ensure that none DUT
is connected to the meter and the instrument is
disconnected from any circuit and is powered OFF.

NOTE: To achieve optimum precision, please refer to
“Clear Function” for details bef ore tes ti ng.

Inductance Measurement

1. Press the POWER button for a long time to turn
on the instrument.

2. Press the L/C/R/Z button until “L” is displayed on
the screen to select inductance measurement

3. Insert an inductor into test slots or connect a
tested inductor through a proper test accessory
(e.g., banana plug-crocodile clip test leads, test
fixture or S MD t es t t we e zer s ). See figures 12. And
figure 13 shows the optional 4-terminal test
accessories.

4. Press the FREQ button until the desired test
frequency is displayed on screen.

60

5. Press the D/Q/θ/ESR button to select the desired
secondary parameter.

6. Read the readings on LCD for inductance
measured values.

+ -

!

H

CUR

L

CUR

H

POTLPOT

Handheld LCR Meter

100Hz - 100kHz

L

Q

AUTO

SER

μ

H

@

OFF

HOLD

FREQ

L/C/R/Z

/ESR

UTIL

CLEAR

RMT

P

S

TOL

RATE

AUTO

REC

D/Q/

TH2822C

θ

Figure 12- Inductance Measurement

Below are TH26027A，TH26009C，TH26029C 4­terminal test accessories:

61

TH26029C

SMD KELVIN TWEEZER

H

CURLCUR

GUARD

TH26009C

SMD KELVIN TWEEZER

H

CURLCUR

GUARD

H

CUR

L

CUR

GUARD

TH26027A

KELVIN CLIP

Figure 13- 4-termin al Test A ccess or ies

62

Capacitance Measurement

WARNING: Before testing, ensure that the

tested capacitor has been fully discharged.

1. Press the POWER button for a long time to turn
on the meter.

2. Press the L/C/R/Z button u ntil “C” is displayed on
the screen to select capacitance measurement.

3. Insert a capacitor into test slots or connect a
tested capacitor through a proper test accessory
(e.g., banana plug-crocodile clip test leads, test
fixture or SMD test tweeze rs). See figure 14. And
figure 13 shows the optional 4-terminal test
accessories.

4. CAUTION: Before inserting a capacitor or
capacitive component into the input slots or
terminals, be sure to fully discharge the
component. Some larger capacitive
components may take longer to discharge. In
these cases, please allot enough time for a full
discharge. If improper discharging of the
component is done, it will damage the input
terminals of the meter.

5. Press the FREQ button until the desired test
frequency is displayed on screen.

63

6. Press the D/Q/θ/ESR button to select the desired
secondary parameter.

7. Read the readings on LCD for capacitance
measured values.

+ -

!

H

CUR

L

CUR

H

POT

L

POT

Handheld LCR Meter

100Hz - 100kHz

C

AUTO

D

PAL

p

F

@

OFF

HOLD

FREQ

L/C/R/Z

/ESR

UTIL

CLEAR

RMT

P

S

TOL

RATE

AUTO

REC

D/Q/

TH2822C

θ

Figure 14- Capacitance Measurement

64

Resistance Measurement

1. Press the POWER button for a long time to turn
on the instrument.

2. Press the L/C/R/Z button u ntil “R” is displayed on
the screen to select inductance measurement.

3. Insert a res istor into test sl ots or connect a tes ted
resistor through a proper test accessory (e.g.,
banana plug-crocodile clip test leads, test fixture
or SMD test tweezers). See figure 15. And figure
14 shows the opt ion al 4-terminal test accessories.

4. Press FREQ button until the desired test
frequency is displayed on screen.

5. Press the D/Q/θ/ESR button to select the desired
secondary parameter.

6. Read the readings on LCD for resistance
measured values.

NOTE: The meter uses an AC signal for
measurement of resistance, so what the test result
shows is AC resistance property instead of DC
resistance property.

65

+ -

!

H

CUR

L

CUR

H

POT

L

POT

Handheld LCR Meter

100Hz - 100kHz

R

AUTO

D

kHz

PAL

HOLD

FREQ

L/C/R/Z

/ESR

UTIL

CLEAR

RMT

P

S

TOL

RATE

AUTO

REC

D/Q/

TH2822C

@

OFF

θ

Ω

Figure 15- Resistance Measurement

66

Impedance Measurement

1. Press the POWER button for a long time to turn
on the instrument.

2. Press the L/C/R/Z button until “Z” is displayed on
the screen to select impedance measurement.

3. Insert impedance (resistor, capacitor or inductor)
into test slots or connect tested impedance
through a proper test accessory (i.e., banana
plug-crocodile clip test leads, test fixture or SMD
test tweezers). Figure 13 shows the optional 4­terminal test accessories.

4. Press the FREQ button until the desired test
frequency is displayed on screen.

5. Press the D/Q/θ/ESR button to select the desired
secondary parameter.

6. Read the readings on LCD for impedance
measured values.

67

Remote Communication

The meter has the capability to communicate with a
PC over the mini USB interface. Upon installation of a
USB driver, PC can control the instrument and collect
test results over virtual serial interface.

Connecting Instrument to PC

Follow the below procedures for connection setup.
1． Install USB driver from CD or download the USB

driver from www.tonghui.com.cn.

2． With a Mini-USB cable, connect one end of it to

the LCR meter and the other end to an available
USB port on PC. Press the POWER button to turn
on the meter.

3． Skip the next process when the driver has been

stalled.

4． When Windows recognize the USB connection,

PC will prompt user to install driver. The following
process is to cancel installation guide and directly
run the setup program in the setup file.

5． When completed, Windows will create a virtual

serial port and distri bute a serial number. See
Windows device manager for details.

68

6． Open the control software and use the assigned

serial number to communicate with the handheld
LCR meter. You can Download the FastAccess
PC communication software from our web site
(

www.tonghui.com.cn) for a demo use.

+ -

!

H

CUR

L

CUR

H

POT

L

POT

Handheld LCR Meter

100Hz - 100kHz

LCR

ESR

MAXAVGMIN

θQ

AUTO

D

2105%

deg
kHz

PAL
SER

μ

H

p

F

μ

RMT

Mk

TOL

DH

n

n

@

OFF

Z

FASTSLOW

HOLD

FREQ

L/C/R/Z

/ESR

UTIL

CLEAR

RMT

P

S

TOL

RATE

AUTO

REC

D/Q/

TH2822C

θ

%

Ω

Ω

Figure 16- Connection to PC

Virtual Serial Port Configuration

Below is the serial communication configuration of
TH2822 series:

69

• Baudrate：9600

• Data bits： 8

• Parity: None

• Stop bits： 1

• Flow Control: None

Upon the installati on of USB driver, if the default
assigned by serial port does not match to above
configuration, please modify it as the following
process:

Open Windows device manager→ Port→ Used Ser ial
Port→ Right Click → Property→ Port Set up

RMT Operation

In the case of communication, the RMT button is
used to change the running modes：

Change to Local Operation in Remote Control Mode;
Change to Auto Fetch state in Local Operation mode;
Disable the Auto Fetch function in Auto Fetch state.

NOTE: Auto Fetch state means to send testing result
automatically without needing the initiative inquiry of
PC.

70

Remote Mode

Upon the acceptance of any commands from PC, the
meter will be automatically set into remote mode. In
this mode, the LCD display will show “RMT” indicator.
When this is shown, all front panel button will be

locked and disabled, except for RMT and POWER
buttons. If the meter has been in Auto Fetch mode
before receiving remote control commands, Auto
Fetch mode will be disabled.
That is to say, among panel operation, Auto Fetch and
Remote Control, remote control has the highest
priority.
To exit remote control, press the RMT button. When
the “RMT” indicator disappears on the LCD display,
the meter goes back to local operation.

NOTE: If the local operation is locked, RMT button
will be ineffective as well. See *LLO common
command in Command Reference section for details.

Press RMT button to change to Auto Fetch state,
when it is not in the remote mode. See the description
below.

Auto Fetch

When the meter is out of remote control, it can be
changed to Auto Fetch mode. That is, the meter will

71

automatically send data to the interface bus upon
every measurement. Therefore, PC will obtain data by
direct reading with no need to send any commands. It
is quite useful in the recording data simply.

Enable/Disable Auto Fetch

To toggle between enabling and disabling auto
fetching when the meter is out of remote control,

press the RMT button. In Auto Fetch, every flash of
“RMT” means send a measurement result.

NOTE: Auto Fetch can be disabled by remote control.
When a remote command is sent to the meter, Auto
Fetch will be disabled. To re-enable Auto Fetch after

remote command, first press the RMT button to return
panel operation and then enter into Auto Fetch mode
by another press of RMT.

Command Protocols

Overview

TH2822 series support SCPI commands with ASCII
character strings transmitting control commands and
returning query information and data and with a

72

specified terminator identifying the termination of a
command line or query data line.
The adoption of SCPI commands brings convenience
for the interaction control of PC on the meter through
programming. Command format is compliance with
specifications and easy for understanding and use.

Common Command

The IEEE 488 standard defines the common
commands for general use in all kinds of instrument.
Common commands usually come with the asterisk
“*” character, and may include parameters. Some
examples of Common command like: *IDN?, *GTL,
*LLO. TH2822 series support a few common
commands. See the following command descriptions
for more details.

Termination Character

A terminator is a character sent by a host, which
identifies the end of a command line. Only when a
termination character is received, the instrument will
analyze and deal with command character string.
Terminators can be any one of the following character
strings:

73

<CR> (Carriage Return， ASC(&H0D)) ；
<LF> (Line Feed， ASC(&H0A))；

<CR><LF>

Returned Result

After the meter executes a query command, the return
of the result will be in the following format:

<Result> + <CR> <LF>

CR is Carriage Return and LF is Line Feed.
For example, in inquiring measured results (FETCH?),

the format of the printed data will be shown as the
following:

<Primary measured data, Secondary

measured data, Tolerance Result> <CR> <LF>

Data Types

Table 4 below explains the different data types
transm itted on bus with ASCII char acter s :

74

Table 4 - Data Type

Data Type

Explanation

Example

<NR1>

Integer

+800,-200,100,-50

<NR2>

Real

+1.56,-0.001,10.5

<NR3>

This representation

has an explicit
radix point and an

exponent

+2.345678E+04

-1.345678E-01

<Boolean>

A parameter for
Boolean setting.
Always return “0”
or “1” for Boolean

query command

ON or OFF

<Literal>

A string is used as
command
parameters with

short literal form

HOLD

Symbol Convention

Syntax Symbols in Commands

Below symbols is a part of commands:

75

Syntax

Symbol

Explanation

:

Colon means to enter into next
command level

;

Separate another command at the
same command level

*

common command

,

multi-parameter delimiter

？

inquiry

Space, separate commands from
parameters

“ ”

quoting part

Symbols in Command Explanations

Below symbols are used for the description of
command format, which are not the constituting part
of command.

Table 5-Command Specifier

Mark Symbol

Explanation

[ ]

Option; can be om itted

|

Exclusive OR

< >

Defined elem ent

( )

Comment

76

Abbreviation, upper case and lower case commands

1． There are two command formats: complete

format and abbreviated format. In the following
command description, capital s ect ion of the
complete commands shows abbreviations
format. It has the same effect of sending
abbreviated and complete commands.

2． Abbreviation command is generally shown in

the form of 4-letter. Any abbreviation absent
from command table is taken as incorrect
command.

3． Either uppercase or lowercase letters, the

effects on the bus are the same.

77

Command Reference

Common Command

*IDN?

Query instrument ID.
Return: <instrument model>, <firmware version >,
<serial number>

*LLO

Local Lockout. This means that all front panel buttons,
including the RMT key is not avail able. ( POWER
button is enabled.)

*GTL

Go to local and remove local lockout. If *LLO is sent,
the only way to operate front panel is to go to *GTL.

*TRG

Trigger the instrument to take a measurement. Due to
the automatically continuous test, *TRG command is
of no use.

78

SCPI Commands

FREQuency Subsystem

FREQuency <value>

Description: Set measurement frequency

Parameters are 100, 120, 1000, 10000,100000
or 100hz,120hz,1khz,10khz,100khz (model
supported)
Example: FREQuency 100hz

Set 100Hz frequency

FREQuency?

Description: Query the measurement frequency

Return: < 100hz，120hz, 1khz, 10khz，100khz>

FUNCtion subsystem

FUNCtion:impa < L | C | R | Z >

Description: Se lec t primary param eter

Example: FUNCtion:impa L
Selects L as primary parameter

FUNCtion:impa?

Description: Qu ery primar y parameter
Return: <L, C, R, Z, NULL >

FUNCtion:impb < D | Q | THETA | ES R >

Description: Select secondary parameter

Example: FUNCtion:impb D

Select D as secondary parameter

79

FUNCtion:impb?

Description: Query secondary parameter
Return: <D, Q, THETA, ESR, NULL>

FUNCtion:EQUivalent < SERies | parallel |
PAL >

Description: Set equ i va lent mode

Parameters: SERies — series mode
Parallel — parallel mode
PAL — parallel mode

Example: FUNCtion:EQUivalent SERies
Set series mode

FUNCtion:EQUivalent?

Description: Query the equivalent mode
Return: <SER, PAL>

CALCulate subsystem

CALCulate:TOLerance:STATe < ON | OFF >

Description: Enable or disable tolerance mode
Example: CALCulate: TOLerance:STATe ON

CALCulate:TOLerance:STATe?

Description: Query the tolerance mode
Return: <ON, OFF >

CALCulate:TOLerance:NOMinal?

Description: Query the nominal value

Return: NR3 or -----(exceeding data range)

80

CALCulate:TOLerance:VALUe?

Description: Qu ery the percentage value of

tolerance

Return: NR3 or ----- (exceeding data range)

CALCulate:TOLerance:RANGe < 1 | 5 | 10 |
20 >

Description: Set tolerance range as 1%,5%,10%

or 20% (20% not available for some models )
Example: CALCulate:TOLerance:RANGe 1

Set 1% tolerance range

CALCulate:TOLerance:RANGe?

Description: Query the tolerance range

Return: <BIN1, BIN2, BIN3, BIN4 or ---- >
“----” means unsetting range

CALCulate:RECording:STATe < ON | OFF >

Description: Enable or disable recording function
Example: CALCulate:RECording:STATe ON

CALCulate:RECording:STATe?

Description: Query the recording state
Return: <ON or OFF>

CALCulate:RECording:MAXimum?

Description: Query the maximum value of

recording function

Return: <NR3, NR3> ( primary and secondary

parameters, when data exceeds limits or
there is no data, what returns is“----”.)

81

CALCulate:RECording:MINimum?

Description: Query the minimum value of

recording function

Return: <NR3, NR3> (primary and secondary

parameters, when data exceeds limits or

there is no data, what returns is “----“)

CALCulate:RECording:AVERage?

Description: Query the average value of

recording function

Return: <NR3, NR3> (primary and secondary

parameters, when data exceeds limits or

there is no data, what returns is “----“)

CALCulate:RECording:PRESent?

Description: Query the present value of

recording function

Return: <NR3, NR3> (primary and secondary

parameters, when data exceeds limits or

there is no data, what returns is “----“)

FETCh Subsyste m

FETCh?

Description: query the measurement result.

Return: <NR3, NR3, N R1 > that is primary
parameter, secondary parameter and compared
result.

Example: FETCh?

82

Summary of Supported SCPI Commands

Table 2 - Summary of SCPI Commands

Command

Parameter

Explanation

FREQuency

<Value>

Set Test Frequency

FREQuency?

Query Test Frequency

FUNCtion

:impa

<Literal>

Select primary display
parameter

:impa?

Query primary display
parameter

:impb

<Literal>

Select secondary display
parameter

:impb?

Query secondary display
parameter

:EQUivalent

<Literal>

Set equivalent mode

:EQUivalent? Query equivalent mode

CALCulate

:TOLerance

:STATe <Boolean> Enable/disable tolerance

mode

:STATe? Query tolerance mode

:NOMinal?

Query nominal value

:VALUe?

Query percent of tolerance

:RANG <Value> Set tolerance range

:RANGe?

Query tolerance range

:RECording

:STATe

<Boolean>

Enable/disable recordi ng
function

:STATe? Query recording state

:MAXimum?

Query max. value of
recording

83

:MINimum?

Query min. value of recording

:AVERage?

Query average value of

recording

:PRESent?

Query present value of

recording

FETCh?

Query measurement result

Error Codes

If the received commands or parameters from bus
contain errors, the meter will terminate the analysis
and execution commands. At the same time, error
code will be d ispla yed on L CD and bee p will be sou nd.
Below defines the error description based on the error
code.

E10: Unknown command
E11: Parameter Error
E12: Syntax Error

84

Specifications

Below is the general specification and the accuracy
specification of TH2822 series and applicable to
TH2822, TH2822A, TH2822C.
Declaration: The specifications are subject to change
without notice.

*NOTE: 120Hz is the rated frequency. The actual
frequency is 120.048Hz.

General Specifications

Function

Measurement Parameters

Primary: L/C/R/Z
Secondary: D/Q/θ/ESR

Equivalent Mode Series, Parallel
Auto LCR Function Manual, Auto
Ranging Mode Auto
Test Terminals 3-terminal,5-terminal
Measurement Speed 4 meas/sec，1.5meas/sec
Correction Short, Open
Tolerance Mode TH2822 1%，5% ， 10%

85

TH2822A/C 1%，5% ， 10% ， 20%
Input Protection Fuse 0.1A / 63V
Interface Mini-USB (virtual serial port)

Test Signal

Signal
Frequency

TH2822 100Hz,*120Hz,1kHz

TH2822A 100Hz,*120Hz,1kHz,10kHz

TH2822C

100Hz,*120Hz,1kHz,10kHz,
100kHz

Test Signal Level 0.6Vrms
Output Impedance 100Ω

Display

Display LCD primary-secondary dual display

Backlight
(not available for
TH2822)

Battery supply: when backlight is on,
luminance is reduced by half 15s later
and automatically turned off 30s later.
Powered by adapter: backlight off until

manually turned off

Readings

Max. Counts of Primary Parameter:

40,000; D / Q / θ Min. resolution of

secondary parameter: 0.0001.

Basic Accuracy

0.25%

（see accuracy specifications for

details）

Primary Range and
Resolution

See Accuracy Specifications

Secondary Range for Displ ay Resolution

86

Parameter

ESR 0.0000W -- 999.9W 0.0001W
D 0.0000 -- 9.999 0.0001
Q 0.0000 -- 9999 0.0001
θ -179.9° -- 179.9° 0.01°

Power Supply

Battery
Model

TH2822/A IEC 6LR61,9V Alkaline battery
TH2822C

LH-200H7C,8.4V Ni-MH
200mAH rechargeable battery

AC Adapter

Input：220V(1±10% )， 50Hz(1
±5%)
Output：12V -15V DC

Operating Current
(with backlight off)

Max.:28mA
Typical:25mA
(@1kHz,100Ωload)

Standby(Power Off)Current

Max. :2μA(Non-rechargeable)

Battery Life

TH2822/A

16 Hours (typical) based on

backlight off and new alkaline

TH2822C

6 Hours (typical) based on
backlight off and new fully
charged Ni-MH battery

Charge Time and

Current(TH2822C)

Max.: 80min
Max. Current: 42mA

Auto Power Off
(valid for battery powered)

5min/15min/30min/60min/OFF
available ;factory defa ult :5mi n

Low Voltage Indicator

When battery voltage drops
below 6.8V, Low Voltage
Indicator turns on

87

General

Operation
Condition

Temperature 0℃ -- 40℃

Relative Humidity ≤90% R.H.
Weight 350g

Dimensions (H ´ W ´ D)

190mm ´ 90mm ´
41mm

Safety and EMC compliance

IEC 61010-1:2001
IEC 61326-2-1:2005

Accuracy Specifications

Notices:
1． Environment temperature：23℃±5℃;

Humidity: ≤75% R.H.

2． Valid after 10 minutes of warm up time.
3． Test in measuring slots on front panel.
4． Measurements performed after correct open

and short correction.
5． Test in the recommended equivalent mode.
6． Percentage accuracy representation:

±(%reading+ least significant digits)

7． Actual measurement and display range may

exceed the ranges in below table, but we do

not specify its accuracy again.
8． Subscript Explanation:

88

s—series equivalent; p—parallel equ ival ent;

e—accuracy
9． Some parameters cannot be expressed as

the way of data sheet; therefore they can just

be converted by formulas according to

corresponding results.

Inductance (L) and Quality Factor (Q)

Range Display Range

Accuracy

Equi-

valent

Mode

Le De *

100Hz/120Hz

1000H 400.0H∼1000.0H 1.00%+3 0.0100 Parallel

400H 40.00H∼399.99H 0.35%+2 0.0035 Parallel

40H 4.000H∼39.999H

0.25%+2 0.0025 Parallel

4H 400.0mH∼3.9999H 0.25%+2 0.0025 ----

400mH 40.00mH∼399.99mH 0.25%+2 0.0025 Series

40mH 4.000mH∼39.999mH 0.45%+2 0.0045 Series

4mH 0uH∼3.999mH 1.40%+5 ------ Series

1kHz

100H 40.00H∼100.00H 1.00%+3 0.0100 Parallel

40H 4.000H∼39.999H 0.35%+2 0.0035 Parallel

4H 400.0mH∼3.9999H 0.25%+2 0.0025 Parallel

400mH 40.00mH∼399.99mH 0.25%+2 0.0025 ----

40mH 4.000mH∼39.999mH 0.25%+2 0.0025 Series

4mH 400.0uH∼3.9999mH 0.45%+2 0.0045 Series

400μH 0.0uH∼399.9μH 1.40%+5 ------ Series

89

10kHz

1000mH 400.0mH∼999.99mH 0.80%+3 0.0080 Parallel

400mH 40.00mH∼399.99mH 0.35%+2 0.0035 Parallel

40mH 4.000mH∼39.999mH 0.25%+2 0.0025 ----

4mH 400.0uH∼3.9999mH 0.30%+2 0.0030 Series

400μH 40.00uH∼399.99μH 0.45%+2 0.0045 Series

40μH 0.00uH∼39.99μH 1.40%+5 ------ Series

100kHz

100mH 40.00mH∼399.99mH 1.20%+5 0.0120 Parallel

40mH 4.000mH∼39.999mH 0.80%+2 0.0080 Parallel

4mH 400.0uH∼3.9999mH

0.50%+2 0.0050 ----

400μH 40.00uH∼399.99μH 0.50%+2 0.0050 Series

40μH 4.000uH∼39.999μH 0.80%+5 0.0080 Series

4μH 0.000uH∼3.999μH 2.50%+10 ------ Series

*Note: Accuracy of De is assessed when De <0.5
Quality factor Q and Accuracy Qe is calculated by the
following formula:

when

ex

DQ ×

≤ 1，

ex

ex

e

DQ

DQ

Q

×

×

±=

1

2

Where,

x

Q

is the measurement value.

90

Capacitance(C) and Dissipation (D)

Range

Display Range

Accuracy

Equi-

valent

Mode

Ce De*

100Hz/120Hz

20mF 4.000mF∼20.000mF 5.00%+5 ±0.0500 Series

4mF 400.0μF∼3.9999mF 1.00%+3 ±0.0100 Series

400μF 40.00μF∼399.99μF 0.35%+2 ±0.0035 Series

40μF 4.000μF∼39.999μF 0.25%+2 ±0.0025 Series

4μF 400.0nF∼3.9999μF 0.25%+2 ±0.0025 ----

400nF 40.00nF∼399.99nF 0.25%+2 ±0.0025 Parallel

40nF 4.000nF∼39.999nF 0.35%+3 ±0.0035 Parallel

4nF 0pF∼3.999nF 1.25%+5 ------ Parallel

1kHz

1000μF 400.0μF∼999.99μF 2.00%+5 ±0.0200 Series

400μF 40.00μF∼399.99μF 1.00%+3 ±0.0100 Series

40μF 4.000μF∼39.999μF 0.35%+2 ±0.0035 Series

4μF 400.0nF∼3.9999μF 0.25%+2 ±0.0025 Series

400nF 40.00nF∼399.99nF 0.25%+2 ±0.0025 ----

40nF 4.000nF∼39.999nF 0.25%+2 ±0.0025 Parallel

4nF 400.0pF∼3.9999nF 0.35%+3 ±0.0035 Parallel

400pF 0.0pF∼39.99nF 1.25%+5 ------ Parallel

91

10kHz

100μF 40.00μF∼100.00μF 3.00%+5 ±0.0300 Series

40μF 4.000μF∼39.999μF 1.50%+3 ±0.0150 Series

4μF 400.0nF∼3.9999μF 0.35%+2 ±0.0035 Series

400nF 40.00nF∼399.99nF 0.25%+2 ±0.0025 Series

40nF 4.000nF∼39.999nF 0.25%+2 ±0.0025 ----

4nF 400.0pF∼3.9999nF 0.25%+2 ±0.0025 Parallel

400pF 40.00pF∼399.99pF 0.35%+3 ±0.0035 Parallel

40pF 0.00pF∼39.99pF 1.25%+5 ------ Parallel

100kHz

10μF 4.000μF∼10.000μF 6.00%+20 ±0.0600 Series

4μF 400.0nF∼3.9999μF 2.50%+10 ±0.0250 Series

400nF 40.00nF∼399.99nF 0.80%+5 ±0.0080 Series

40nF 4.000nF∼39.999nF 0.50%+2 ±0.0050 Series

4nF 400.0pF∼3.9999nF 0.50%+2 ±0.0050 ----

400pF 40.00pF∼399.99pF 0.80%+2 ±0.0080 Parallel

40pF 4.000pF∼39.999pF 1.20%+5 ±0.0120 Parallel

4pF 0.000pF∼4.999pF 3.00%+10 ------ Parallel

92

Impedance（Z） and Phase Angle

（θ）

Range

Display Range

Accuracy

Equi-

valent

Mode

Ze

θe

100Hz -- 10kHz

10MΩ 4.000MΩ∼10.000MΩ 3.00%+5 ±1.75° Parallel

4MΩ 400.0kΩ∼3.9999MΩ 1.25%+3 ±0.75° Parallel

400kΩ 40.00kΩ∼399.99kΩ 0.35%+2 ±0.25° Parallel

40kΩ 4.000kΩ∼39.999kΩ 0.25%+2 ±0.15° Parallel

4kΩ 400.0Ω∼3.9999kΩ 0.25%+2 ±0.15° ----

400Ω 40.00Ω∼399.99Ω 0.25%+2 ±0.15° Series

40Ω 4.000Ω∼39.999Ω 0.35%+2 ±0.25° Series

4Ω 0.4000Ω∼3.9999Ω 1.00%+3 ±0.60° Series

0.4Ω 0.0000Ω∼0.3999Ω 3.00%+5 ----- Series

100kHz

10MΩ 4.000MΩ∼10.000MΩ 8.00%+20 ±4.60° Parallel

4MΩ 400.0kΩ∼3.9999MΩ 3.00%+10 ±1.75° Parallel

400kΩ 40.00kΩ∼399.99kΩ 1.20%+5 ±0.69° Parallel

40kΩ 4.000kΩ∼39.999kΩ 0.80%+2 ±0.46° Parallel

4kΩ 400.0Ω∼3.9999kΩ 0.50%+2 ±0.30° ----

400Ω 40.00Ω∼399.99Ω 0.50%+2 ±0.30° Series

40Ω 4.000Ω∼39.999Ω 0.80%+5 ±0.46° Series

4Ω 0.4000Ω∼3.9999Ω 2.50%+10 ±1.43° Series

0.4Ω 0.0000Ω∼0.3999Ω 6.00%+20 ----- Series

*Note: Accuracy of De is assessed when De <0.5

93

Equivalent Series Resistance

Accuracy of equivalent series resistance is calculated
by below formula：

Rse =

ex

X

φ

×±

Where,

x

X

is measured reactance,

xx

fLX

π

2=

or

x

x

fC

X

π

2

1

=

e

φ

is the phase angle accuracy，

180

π

θφ

×=

ee

Notice：the accuracies of ESR and Rs are same.

Equivalent Para ll el Resis ta nc e

Accuracy of equivalent series resistance is calculated
according to the below formula:

Rpe =

ex

epx

D

R

φ

φ



×

±

R

px

is the measured value of Rp, Dx is the measured

value of dissipation.

94

Maintenance

W

ARNING: Do not perform any service by

yourself. Service should only be done by quali fied
personnel and trained technicians.
WARNING: Beware of liquid and residues,
especially conductive matter.

Se

rvice

I

f the instrument fails to power on, first check battery,
external source and power sockets and the validity of
buttons.
If the measurement result is abnormal, first inspect the
condition of test accessories and damage of reed in
test slots. See operation manual for information of
correct operation.
Do not replace components. Contact the after-sale
department of our company or relevant distributors for
uncertain maintenance.
The meter must be turned off or removed from
external power before replacing battery. See Installing
Battery section for details.

95

Cleaning

B

efore cleaning this meter, make sure the power is
OFF and remove external AC adapter if one is used.
To avoid electrical shock or damaging the meter,
prevent water from getting inside the case. In the case
that water gets inside, remove the battery immediately
and do not operate the instrument immediately.
To clean the meter, wipe the dirty parts with a soft
cloth soaked with diluted neutral detergent. Avoid
having the instrument too wet to prevent the detergent
from penetrating into the inside components of the
meter, causing damages.
After cleaning, make sure the instrument is completely
dried before operating it again.

96

Limited Warranty

The instrument, component parts and accessories will
be free from defects in workmanship and materials for
a period of two years from date of purchase.
Tonghui will, without charge, repair or replace, at its
option, defective product or component parts.
Returned product must be accompanied by proof of
the purchase date in the form of a sales receipt and
the included accessories.
This warrant y does not appl y in the event of mis us e or
abuse of the product or as a result of unauthorized
alterations or repairs.
The warranty is void if the serial number is altered,
defaced or removed.