Tonghui U822 User manual

OPERATION MANUAL
U822/U822A/U822C
Handheld LCR Meter
EUCOL ELECTRONIC TECHNOLOGY CO.,LTD.
WWW.EUCOL.COM.CN

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U822 Series Operation Manual
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Contents
Safety Summary.................................................................................................................................................... 3
Safety Guidelines.................................................................................................................................................. 3
Introduction........................................................................................................................................................... 4
Package Contents................................................................................................................................................. 4
Front Panel Overview........................................................................................................................................... 5
Front Panel Buttons ..............................................................................................................................................................5
Button Function Definition.....................................................................................................................................................6
LCD Display Overview..........................................................................................................................................................6
LCD Display Descriptions .....................................................................................................................................................6
Special Display Indicators.....................................................................................................................................................7
Test Port ...............................................................................................................................................................................7
Powering Instrument............................................................................................................................................ 9
Installing Battery ...................................................................................................................................................................9
Connecting External Power Source ......................................................................................................................................9
Battery Capacity Indication .................................................................................................................................................10
Backlight Display ................................................................................................................................................................10
Charge Display ...................................................................................................................................................................11
Operation Instruction......................................................................................................................................... 12
Data hold mode (HOLD) .....................................................................................................................................................12
Data Record Mode (REC)...................................................................................................................................................12
L/C/R/Z Select Mode ..........................................................................................................................................................13
D/Q/θ/ESR Select Mode .....................................................................................................................................................13
Test Frequency (FREQ)......................................................................................................................................................13
Tolerance Mode (TOL%) ....................................................................................................................................................13
Auto LCR Mode ..................................................................................................................................................................14
Measurement Rate (SPEED)..............................................................................................................................................14
Series/parallel Equivalent Mode .........................................................................................................................................14
Utility Menu (UTIL) ..............................................................................................................................................................15
Clear Functions (CLEAR) ...................................................................................................................................................17
Remote Control (RMT)........................................................................................................................................................19
Fuse Detection....................................................................................................................................................................19
Quick Start Guide ............................................................................................................................................... 20
CAUTION............................................................................................................................................................................20
Inductance Measurement ...................................................................................................................................................20
Capacitance Measurement .................................................................................................................................................20
Resistance Measurement ...................................................................................................................................................21
Impedance Measurement ...................................................................................................................................................21
Remote Communication .................................................................................................................................... 21
Connecting Instrument to PC..............................................................................................................................................21
Virtual Serial Port Configuration..........................................................................................................................................22
RMT Operation ...................................................................................................................................................................22
Specifications...................................................................................................................................................... 24
General Specifications ........................................................................................................................................................24
Accuracy Specifications ......................................................................................................................................................25
Maintenance........................................................................................................................................................ 28
Service................................................................................................................................................................................28

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Cleaning..............................................................................................................................................................................28
Limited Warranty ................................................................................................................................................ 28

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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 EUCOL’s after-sale service department.
DO NOT REMOVE 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.
Safety Guidelines
To ensure that you use this device safely, follow the safety guidelines listed below:
zThis 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.
zThe warnings and safety precautions should be read and well understood before the instrument is
used.
zUse the meter only as specified in this manual.
zConfirm that the circuits have been powered off and all capacitors in the circuits been discharged
before measuring in-circuit components.
zDischarge all charging elements, such as capacitors, before testing.
zThe power for the meter is supplied with a single standard 9V battery. But also a line operation is
possible using a power adapter of 9VDC/150mA. If a power adapter is selected, please be sure to
meet the safety requirements of a relevant IEC standard.
zThe battery using in U822C is rechargeable. Do not charge non-rechargeable 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 (-) .
Environmental Conditions
Operating Environment 0 °C to 40 °C
Storage Humidity 0 – 80% R.H.
Storage Environment -20 °C to +50 °C
Pollution degree 2

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Introduction
U822 series are designed for measuring inductance, 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.
U822 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 100Ωand testing
level of 0.6Vrms. The auto range can rapidly display the measuring results and automatically choose the desirable
testing parameters in accordance with components properties. Its measuring accuracy is up to 0.2%.
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 the selections of the
key tone, auto power-off and storage.
All U822 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
U822 series are equipped with the following contents：
•U822/U822A/U822C handheld LCR meter
•Instruction manual
•U26027 Kelvin clip test leads
•U26010 Short-circuit plate
•U26030 7.2V Ni-MH rechargeable battery
•U26028 9V/150mA DC adapter
•* U26029 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 EUCOL or relevant distributor immediately.

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Front Panel Overview
Figure 1 - Front Panel Display (model U822C shown)
NOTE: Refer to the adapter
’ s label for input parameters of it. Rated output parameters is 9VDC ， 150mA ，
4mm.
NOTE: Use with included power adapter only or purchase the specified adapters from EUCOL. Use 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 , the external power will charge the battery simultaneously. U822 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, be sure that the polarity matches 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.
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.
White—the secondary function, it means that the function will be set or configured if that button is pressed and
hold down for 2 seconds.
Yellow—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”.

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Figure 2 –Button Display (Model U822C shown)
Button Function Definition
1．Power ON/OFF Button
2．Frequency/Record Mode Button
3．Remote Control/Backlight 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
LCD Display Overview
Figure 3 - LCD Indicator Display
LCD Display Descriptions
1. – Remote mode indicator
2. Med – Medium measuring rate indicator
3. Slow – Slow measuring rate indicator
4. – Record mode indicator
5. Max – Maximum reading indicator in the record mode
6. ESR – Series mode indicator for secondary parameters

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7. Avg – Average reading indicator in the record mode
8. Min – Minimum reading indicator in the record mode
9. – Tolerance mode indicator
10. – Limits indicator in tolerance mode
11. – Auto power-off indicator
12. – Batter capacity indicator
13. – Phase angle (θ) units indicator
14. –ESR(ohm) units indicator
15. – Frequency units indicator
16. – Percentage indicator (in tolerance mode)
17. – Data hold indicator
18. – Inductance units (L) indicator
19. – Capacitance units (C) indicator
20. – Resistance(R) /impedance units indicator
21. – Secondary display
22. Q – Quality factor indicator
23. D – Dissipation indicator
24. – Phase angle indicator for secondary display
25. – Primary display
26. – Beeper tone indicator for tolerance mode
27. – Primary display indicator
28. – Automatic LCR indicator
29. – Series mode indicator
30. – Parallel mode indicator
31. Fast – Fast measuring rate 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
U822 series are creatively designed to combine 2-terminal port, 4-terminal port and 5-terminal port, which makes
the convenient test and highly accurate test realized in the instrument.

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Figure 4- test port
With the adoption of standard banana slots, the instrument can use inexpensive banana plug-crocodile 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, U822 series are designed with 5-terminal
testing slots and exclusive test fixture to ensure complete external 4-terminal test and measuring accuracy.
NOTE: U822-05 4-terminal test fixtures are optional for U822 series. Please refer to relevant instrument
accessories.

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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 automatically switched
without interruption.
Installing Battery
U822 series can adopt battery for power supply so that you can take measurements whenever and wherever
without many preparations.
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.
Figure 5- Back Cover
Connecting External Power Source
U822 series are equipped with standard external power adapters, which can use external source.
WARNING: Use the included or specified adapter only. Confirm power parameters be ones that adapters
require before use.
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.

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WARNING: DO NOT, at any time, 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
instrument 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 9VDC.
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.
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 installed correctly is
rechargeable , charging controller will be driven at the same time no matter the instrument is on or off.
Battery Capacity Indication
At the use of battery for power supply, if the display starts flashing the indicator, please charge the battery
before continuing operation. When the external source is plugged in, the flash of indicator indicates the
charging state.
Symbol Battery status
Full
2/3
1/3
Battery will be exhausted
Flas of internal indicates charging state
Backlight Display
U822 series have Backlight display that can allow you to see the LCD display in dark conditions.
To turn on the back light, you should press the 5button for a long time.
To turn off the back light, you should press the 5button 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 lightened for approximate 30 seconds, the back light will automatically
turn off.
Figure 6-Connecting AC Adapter to Mete
r

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When Using External 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 automatically turn off. Unplugging the external power to use battery
power, the back light will decrease its brightness and automatically turn off.
Charge Display
U822 series are equipped with rechargeable circuit. When the external power adapter is plugged in, the power
mode will automatically switched and the battery power circuit will be cut off. The built-in rechargeable battery will
be charged automatically and the power mode will be switched to external power supply.
Single charge circle is about 80 minutes and charge current is approximate 150mA. If a battery is full charged, the
charge will be automatically shut off; 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.

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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 “ ” 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 “ ” indicator will disappear on the screen, and
meter will remain in normal operation mode.
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
“” 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
Recording State
This is the default mode when enabling static recording. In this mode, LCD will display “ ” 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.
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.

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Disable Static Recording
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.
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)
U822 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 cause
different test result. Therefore, a proper frequency should be selected before test.
Selecting Frequency
Change the test frequency, push the FREQ button. If the secondary display does not indicate the frequency, 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 meter will change among the following selectable frequencies:
U822：100Hz/120Hz/1kHz
U822A：100Hz/120Hz/1kHz/10kHz
U822C：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 primary parameters. The selectable ranges
for sorting are as follows: 1%，5%，10%，20% .
When entering tolerance mode, the data indicated in the primary display will be recorded as nominal value.
Displayed value in percentage 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.
Use Tolerance Mode
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.

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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
nominal value. At this point, the “ ” will be displayed on the screen, indicating that the tolerance mode is
activated. A percentage mode will be shown 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 hold, 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%, 10% or 20%, which will be shown 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
might be 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 corresponding primary and secondary parameters and suitable
series/parallel equivalent mode of L, C, R. The selection is done by judging the impedance 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 “ ” indicator on LCD indicates that auto LCR
mode is activated.
In auto LCR mode, the match of secondary parameter 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.
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. “ ” indicator
on LCD will disappear when auto LCR mode is turned off.
Measurement Rate (SPEED)
There are three selectable measurement rates in this instrument: fast, medium and slow. The rate of fast
measurement is about 10 times/sec, medium measurement is about 5 times/sec and slow measurement is
approximate 2 times/sec. The stability of slow measurement is higher than fast measurement.
The fast, medium and slow rates can be directly switched by pressing SPEED button. “FAST” indicator will be
displayed on LCD at fast rate, “Med” indicator at medium 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 equivalent models used in
LCR meters, which are series model and parallel model.

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Figure 7-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 Measurement Mode
Long press P<->S button, “ ” on LCD indicates parallel equivalent mode and “ ” means series
equivalent mode.
Default Equivalent Mode
When select primary parameter, equivalent mode varies with primary parameter:
For capacitors and resistors, default equivalent mode is parallel equivalent mode( );
For inductors, default equivalent is series equivalent mode( ).
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，c，d. 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 will enter utility menu. Primary 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”.
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
SAUE yES / NO/ dEF
bAtt Battery Voltage
Uses of these menu options are as follows:
Control beep sound( bEEP)
Set auto power-off(AoFF)
Save power-up state(SAUE)
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 cand darrow keys. For each UTIL button press, the meter will traverse through each
menu options and will repeat itself in the following order:
bEEP ÆAoFF ÆSAUE ÆbAtt
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.

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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 cand darrow 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 display shows “AoFF”, push thecand darrow 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 “ ” 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
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 (SAUE)
The “SAUE”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/parallel equivalent mode
•Test frequency
•Tolerance mode
•Reference value for Tolerance mode
•Measurement rate
In the utility menu, Press the cand darrow keys to select “yES” ,”NO” or “dEF”. NO means to preserve the
previous setting while yES means to save the current parameter, that is, cover the previous data. 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:

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Table 4 - Instrument Default Settings
Default Setting: NO
Configure and Save Power-up State
Procedure to configure and save power-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 “SAUE” on the primary display.
4. In order to save the current meter settings for power-up state into internal memory, use either cor d
button to change the settings so that the secondary display shows “yES”.
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.
Indicate battery voltage(bAtt)
When menu option changes to “bAtt”, the secondary display will indicate battery voltage that is for reference
instead of for operational function.
Exit Utility Menu
There are two methods for exiting the utility menu: Saving and Exiting, 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 any front panel buttons except UTIL，c，dand 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.
Settings Default Configuration
Primary Function C (capacitance)
Secondary Function None (frequency)
Auto LCR function Off
Equivalent Method 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

U822 Series Operation Manual
18
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.
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 8 - Open Clear
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 should be done.
NOTE:
“----” indicator on secondary display indicates that test terminal is out of short state and short clear cannot
be performed.
Figure 9-Short Clear
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;