twintex LCR Series User manual

LCR Meter
Operation Manual V1.1
BENCHTOP LCR METER

I
CONTENTS
SAFETY INSTRUCTION........................................................................................................................... III
1. PRODUCT INTRODUCTION.............................................................................................................- 1 -
1-1. Description .................................................................................................................................- 1 -
1-2. Features.....................................................................................................................................- 1 -
1-3. Front Panel Introduction.............................................................................................................- 1 -
1-4. Rear Panel Introduction.............................................................................................................- 4 -
2. PANEL OPERATION..........................................................................................................................- 5 -
2-1. <MEAS DISPLAY>.....................................................................................................................- 5 -
2-2. <BIN DISPLAY> (available for 200kHz model only)..................................................................- 9 -
2-3. <MEAS SETUP>......................................................................................................................- 10 -
2-4. <SYSTEMS SETUP>...............................................................................................................- 11 -
2-5. <COMM SETUP>.....................................................................................................................- 12 -
2-6. <ABOUT SYSTEM>.................................................................................................................- 13 -
2-7. Data Storage............................................................................................................................- 13 -
2-8. <INTER Files List> and <EXT Files List>................................................................................- 14 -
3. SPECIFICATIONS............................................................................................................................- 16 -
3-1. Measurement Range................................................................................................................- 16 -
3-2. Accuracy...................................................................................................................................- 16 -
4. HANDLER INTERFACE (available for 200kHz model only)............................................................- 20 -
4-1. Pin Definition............................................................................................................................- 20 -
4-2. Time Sequence of Interface Signal..........................................................................................- 21 -
4-3. Schematic Diagram of Interface Signal ...................................................................................- 21 -
5. REMOTE CONTROL .......................................................................................................................- 22 -
5-1. RS232C Interface.....................................................................................................................- 22 -
5-2. USB HOST...............................................................................................................................- 22 -
6. MAINTENANCE...............................................................................................................................- 23 -
6-1. Inspection.................................................................................................................................- 23 -
6-2. Fuse Replacement...................................................................................................................- 23 -
7. TECHNICAL SPECIFICATIONS......................................................................................................- 24 -
Appendix: Programming Manual..........................................................................................................- 25 -

II
Use of Operation Manual
Please read through and understand this Operation Manual before operating the product. After reading, always
keep the manual nearby so that you may refer to it as needed. When moving the product to another location, be
sure to bring the manual as well.
Calibration Notification
We notify that the LCR meters included in this manual are in compliance with the features and specifications as
stated in this manual. Before shipment, the LCR meter has been calibrated in factory. The calibration procedures
and standards are compliant to the national regulations and standards for electronic calibration.
Warranty
We guarantee that the LCR meter has been passed strict quality check. We warrant our LCR meter’s mainframe
and accessories in materials within the warranty period of one year. We guarantee the free spare parts for
products which are approved defective in this period. To get repair service, please contact with your nearest
sales and service office. We do not provide any other warranty items except the one being provided by this
summary and the warranty statement. The warranty items include but not being subjected to the hinted
guarantee items related to tradable characteristics and any particular purpose. We will not take any
responsibility in cases regarding to indirect, particular and ensuing damage, such as modifications to the circuit
and functions by the users, repairing or component replacement by the users, or damage during transportation.
For product improvement, the specifications are subject to change without prior notice.

III
SAFETY INSTRUCTION
This chapter contains important safety instructions that you must follow when operating the LCR meter and
when keeping it in storage. Read the following before any operation to insure your safety and to keep the best
condition for the LCR meter.
Safety Symbols
The following safety symbols may appear in this manual or on the LCR meter:
Identifies conditions or practices that could result in injury or loss of life.
Identifies conditions or practices that could result in damage to the LCR meter or to
other properties.
High voltage
Refer to the manual
Protective conductor terminal
Earth (ground) terminal
Chassis ground terminal
Safety Guidelines
General Instruction
⚫Do not place heavy objects on the casing.
⚫Avoid serious impact or improper handling to prevent damage to the LCR meter.
⚫Preventive measures for releasing static electricity should be taken when
connecting the LCR meter.
⚫Do not block the air ventilation holes on the two sides and on the back of the
chassis.
⚫Do not disassemble the LCR meter unless you are professionals.
Power supply
AC Input voltage: 110V/220V±10%, 50/60Hz
Connect the protective grounding conductor of the AC power cord to an earth ground
to avoid electrical shock.
Fuse
⚫Make sure the correct type of fuse is installed before power up.
⚫Replace the AC fuse with the same type and rating as the original fuse.
⚫Disconnect the power cord before fuse replacement. Make sure the cause of fuse
blowout is fixed before fuse replacement.
Cleaning
⚫Disconnect the power cord before cleaning.
⚫Use a soft cloth dampened in a solution of mild detergent and water. Do not spray
any liquid.
⚫Do not use chemicals or cleaner containing harsh material such as benzene,
toluene, xylene, and acetone.
Operation environment
⚫Location: indoor, no direct sunlight, dust free, almost non-conductive pollution.
⚫Relative humidity: <80%
⚫Altitude: <2000m
⚫Temperature: 0°C ~ 40°C
Storage environment
⚫Location: indoor
⚫Relative humidity: <70%
⚫Temperature: 10°C ~ 70°C

- 1 -
1. PRODUCT INTRODUCTION
1-1. Description
The LCR series are high precision LCR meter with basic accuracy 0.1% and maximum measurement frequency
10kHz, 30kHz and 200kHz. The 5-digit 4.3-inch TFT LCD display gives easy reading. The RS-232 interface
facilitates in remote control and analysis of measurement results. With its fast measurement speed, wide
frequency range and low cost, the LCR series are widely used in R&D, IQC, online quality control and automatic
test system.
1-2. Features
⚫32-bit core processor
⚫5-digit 4.3-inch TFT LCD display
⚫2 signal source output impedance: 30Ω, 100Ω
⚫100 sets memories for internal storage/save
⚫500 memories for U disk storage/save, supports FAT16 and FAT32 files
⚫Save the last parameter settings before power off
⚫Standard interface: RS232, HANDLER, USB HOST
1-3. Front Panel Introduction
PASS FAI L MEAS SETUP SYSTEM FI LE TRI G
4GHI 10
5JKL
6MNO
2ABC
3DEF
7PQRS
8TUV
9
WXYZ
+/ -
ESC
OK
TOOL
1 2 3 54
6 7 9 8 10 11 12 13 14 15
16
17
18
19

- 2 -
1) Power switch
Press to power ON or OFF the LCR meter.
2) Name label
It shows brand and model number.
3) USB HOST interface
Connect U flash disk to save or load the file.
4) [TOOL]
Make a short press to this key, the menu soft key area shows corresponding menus. Make a short
press again, the menus disappear.
Make a long press (>1 second) to this key, the LCR meter panel is locked. Other keys (except TOOL
key) are locked, no response to press.
Make a long press again to this key, the LCR meter panel is unlocked.All keys response to press.
When the LCR meter is controlled by RS232, the LCR meter front panel is locked by default. Make a
long press to this key again to unlock the front panel.
5) Measurement terminals: LD, LS, HS, HD
4-teminal test lead is used to connect 4-terminal test fixture or cable to measure DUT.
It is recommended to use the test lead attached to the LCR meter. Using self-made test lead or test
lead from other suppliers may cause error in measurement results.
6) LCD display
4.3-inch TFT LCD displays measurement results and conditions.
7) Soft keys
Five soft keys are used to select parameters. The corresponding function of each soft key has been
displayed on its left (the right part of LCD). The function definition varies with different pages.
8) CURSOR keys
This key is used to move the cursor on the LCD displayed page. When the cursor moves to a zone, the
corresponding zone will be lightened.

- 3 -
9) PASS indicator
The indicator lights on to show that the test result has passed.
10) FAIL indicator
The indicator lights on to show that the test result has failed.
11) [MENU]
Five soft keys are used to select parameters. The corresponding function of each soft key has been
displayed on its left (the right part of LCD). The function definition varies with different pages.
When the LCD display the <MEAS DISPLAY> page and the cursor key moves to <MEAS DISPLAY>,
press [MEAS] key to display the measurement results in full screen.
12) [SETUP]
Press this key to enter measurement parameter setup page.
13) [SYSTEM]
Press this key to Enter system setup page.
14) [FILE]
Press this key to enter file management page.
15) [TRIG]
When the trigger mode is set to MAN mode, press this key to trigger the LCR meter.
16) [ESC]
ESCAPE key.
17) [ ]
BACKSPACE key is used delete the last numeric of the input value.
18) [OK]
This key is used to end the input of data, and confirm and save the data displayed on the inputting line.
19) Number keys
These keys are used to input data to the LCR meter. The key consists of numerical keys [0] to [9],
decimal point [.] and [+/-] key.

- 4 -
1-4. Rear Panel Introduction
EXT
RS-232C
HANDLER
USB RATI NG FUSE
∥110V/ 60Hz 30VA
∥220V/ 50Hz 30VA
T1. 0AL 250V
T0. 5AL 250V
FOOT. C
1 2 3 4 5 6
789
1
RS-232C interface
6
Voltage selector
2
USB device interface
7
Power socket
3
Headset interface
8
EXT extension interface
4
FOOT.C foot switch interface
9
HANDLER interface
5
GND screw

- 5 -
2. PANEL OPERATION
2-1. <MEAS DISPLAY>
Press [MEAS] key, the <MEAS DISPLAY> page will be displayed on screen as shown below:
< MEAS DISP >
MEAS
DISP
FUNC : Cp-D
RANGE : AUTO
FREQ : 1 kHz
SPEED : SLOW
BIN
DISP
LEVEL : 1.00V
COMP : OFF
／
Cp
: -
0.0015p F
D
:
0.3697
Vm:OFF
Im:OFF
Quick
Clear
Use softkeys to select
2-1-1. MEAS DISP
In <MEAS DISP> page, use the four direction keys (▲▼◄►) to move cursor to choose of FUNC, FREQ,
LEVEL, RANGE, SPEED, COMP. Pressing [QUICK CLEAR] softkey can make quick clear to all parameters.
Test parameter
When parameter “Cp-D”of FUNC is selected, other test parameters are display in the right side of the screen.
Each parameter can be selected by its softkey. There are test parameters of Cs-D, Cp-D, Ls-Q, Lp-Q, Rs-Q,
Rs-D, Rp-Q, Rp-D, R-X, Zs-θ, Zs-r.
< MEAS DISP >
Cs-D
FUNC : Cp-D
RANGE : AUTO
FREQ : 1 kHz
SPEED : SLOW
Cp-D
LEVEL : 1.00V
COMP : OFF
／
Cp
: -
0.0015p F
Ls-Q
D
:
0.3697
Lp-Q
Vm:OFF
Im:OFF
MORE
1/4
Use softkeys to select

- 6 -
Range mode (not available for 10kHz model)
There are four range modes to choose from: Auto, Hold, Increase +, Decrease -
< MEAS DISP >
AUTO
FUNC : Cp-D
RANGE : AUTO
FREQ : 1 kHz
SPEED : SLOW
HOLD
LEVEL : 1.00V
COMP : OFF
／
Cp
: -
0.0015p F
INCR +
D
:
0.3697
DECR -
Vm:OFF
Im:OFF
Use softkeys to select
Test frequency
Different models have different test frequency points. Press increase or decrease key to choose the last or the
next frequency points.
10kHz model: 100Hz, 120Hz, 1kHz, 10kHz
30kHz model: 100Hz, 120Hz, 1kHz, 10kHz, 20kHz, 30kHz
200kHz model: 40Hz, 50Hz, 60Hz, 75Hz, 100Hz, 120Hz, 150Hz, 200Hz, 250Hz, 300Hz, 400Hz, 500Hz,
600Hz, 750Hz, 800Hz, 1kHz, 1.5kHz, 2kHz, 2.5kHz, 3kHz, 4kHz, 5kHz, 6kHz, 7.5kHz, 10kHz,
12kHz, 15kHz, 15.7kHz, 16.2kHz, 20kHz, 25kHz, 30kHz, 40kHz, 50kHz, 60kHz, 66.6kHz,
75kHz, 100kHz, 120kHz, 150kHz, 200kHz (38 points)
< MEAS DISP >
INCR + +
FUNC : Cp-D
RANGE : AUTO
FREQ : 1 kHz
SPEED : SLOW
INCR +
LEVEL : 1.00V
COMP : OFF
／
Cp
: -
0.0015p F
DECR -
D
:
0.3697
DECR - -
Vm:OFF
Im:OFF
Use softkeys to select

- 7 -
Speed
Speed can be set at fast, medium or slow.
When test frequency ≥1kHz:
Fast: max.30 times/second
Medium: 10 times/second
Slow: 3 times/second
< MEAS DISP >
FAST
FUNC : Cp-D
RANGE : AUTO
FREQ : 1 kHz
SPEED : SLOW
MED
LEVEL : 1.00V
COMP : OFF
／
Cp
: -
0.0015p F
SLOW
D
:
0.3697
Vm:OFF
Im:OFF
Use softkeys to select
Test level
Test level of 10kHz model and 30kHz model can be choose from 0.1V, 0.3V, 1V.
Test level of 200kHz model can be set from 0.05V to 1V.
< MEAS DISP >
1V
FUNC : Cp-D
RANGE : AUTO
FREQ : 1 kHz
SPEED : SLOW
0.3V
LEVEL : 1.00V
COMP : OFF
／
Cp
: -
0.0015p F
0.1V
D
:
0.3697
INCR +
Vm:OFF
Im:OFF
DECR -
Use softkeys to select

- 8 -
Comparator
Comparator can be set ON or OFF. Press <BIN DISP> softkey to enter bin display for more details.
< MEAS DISP >
ON
FUNC : Cp-D
RANGE : AUTO
FREQ : 1 kHz
SPEED : SLOW
OFF
LEVEL : 1.00V
COMP : OFF
／
Cp
: -
0.0015p F
BIN
DISP
D
:
0.3697
Vm:OFF
Im:OFF
Use softkeys to select
Parameter area
In parameter area, the test parameter and its value are displayed.
Font size of the parameters can be set as small size of large size by pressing [FONT] softkey.
Parameter value display can be turn on or off by pressing [DISP] softkey.
Deviation can be set as OFF, ABS or % by pressing [DEV] softkey.
< MEAS DISP >
FONT
SMALL
FUNC : Cp-D
RANGE : AUTO
FREQ : 1 kHz
SPEED : SLOW
DISP
OFF
LEVEL : 1.00V
COMP : OFF
／
Cp
: -
0.0015p F
DEV
OFF
D
:
0.3697
Vm:OFF
Im:OFF
Use softkeys to select

- 9 -
Monitored Voltage and Current
Vm and Im are monitored voltage and current of the DUT respectively. When Vm or Im is selected, it can be set
ON or OFF.
< MEAS DISP >
ON
FUNC : Cp-D
RANGE : AUTO
FREQ : 1 kHz
SPEED : SLOW
OFF
LEVEL : 1.00V
COMP : OFF
／
Cp
: -
0.0015p F
D
:
0.3697
Vm:OFF
Im:OFF
Use softkeys to select
2-2. <BIN DISPLAY> (available for 200kHz model only)
Press [BIN DISP] key in the pay of <MEAS DISP>, the <BIN DISPLAY> page will be displayed on screen as
shown below:
< BIN DISP >
MEAS
DISP
COMP : OFF AUX : OFF COUNT : OFF
NOMINAL: 0.0000pF MODE : ABS
BIN
DISP
BIN
LOW [ ]
HIGH [ ]
COUNT
1
2
3
2nd
AUX : OFF
OUT :
＼
Cp : - 0.0009p F
D :0.0033
BIN:
Quick
Clear
Use softkeys to select
COMP: Set comparator ON or OFF
AUX: Set auxiliary ON or OFF
COUNT: Set counting ON or OFF
NOMINAL: Input nominal value via numeric keys or softkeys. It is reference value of main parameter range.
Deviation is for main parameters only. There are 3 operations to Deviation: OFF, ABS or %.
➔ABS (Absolute Deviation): The absolute deviation is the currently measured value minus preset nominal
value. Its calculation formula is: ⊿ABS = X –Y.
X is the currently measured value. Y is preset nominal value.
➔% (percentage deviation): The percentage deviation is the percentage of the difference between the
currently measured value and the preset nominal value. Its calculation formula is: ⊿% = （X –Y）/ Y×
100[%]
X is the currently measured value. Y is preset nominal value.

- 10 -
2-3. <MEAS SETUP>
Press [SETUP] key, <MEAS SETUP> page will be displayed on screen as shown below:
< MEAS SETUP >
MEAS
SETUP
ResSource
AVERAGE
RangeDwe I I
TrigSource
TrigDelay
TrigEdge
Handler
PulseWidth
: 30Ω
: 1
: 0 ms
: INT
: 0 ms
: RISING
: CLEAR
: 1 ms
Use softkeys to select
ResSource
Set internal resistance source at 30Ωor 100Ω
AVERAGE
Set average number of times between numbers 1 to 255. Input numbers by numeric keys or
soft key “+”and “-”.
RangeDwe I I
Set range delay time between 0ms to 6000ms. Input numbers by numeric keys or soft key “+”
and “-”.
TrigSource
Set trigger source as INT or EXT.
TrigDelay
Set trigger display time between 0ms to 6000ms. Input numbers by numeric keys or soft key
“+”and “-”.
TrigEdge
Set trigger edge as RISING or FALLING.
Handler
Set comparator to CLEAR, HOLD, PULSE.
PulseWidth
Set pulse width between 1ms to 9999ms.

- 11 -
2-4. <SYSTEMS SETUP>
Press [SYSTEM] key, <SYSTEMS SETUP> page will be displayed on screen as shown below:
< SYSTEM SETUP >
SYSTEM
SETUP
Theme
Language
Key Tone
ToneSour
PassTone
FailTone
ParaSave
PassWord
: TRAD-BLUE
: 英语
: ON
: MASTER
: OFF
: TWO SHORT
: AUTO SAVE
: OFF
COMM
SETUP
ABOUT
SYSTEM
SYSTEM
DEBUG
Use softkeys to select
Theme
Set display theme to BLUE, BLACK or GREEN.
Language
Set language as English or Chinese
Key Tone
Turn on or off key tone.
ToneSour
Set tone source as MASTER, EAR PHONE or ALL.
PassTone
Set pass tone OFF, or set pass tone as LONG tune, SHORT tune, TWO SHORT tunes.
FailTone
Set fail tone OFF, or set fail tone as LONG tune, SHORT tune, TWO SHORT tunes.
ParaSave
Set parameter save mode as AUTO SAVE, AUTO LOAD, or NO SAVE.
PassWord
In this page, press corresponding softkeys to choose different functions:
1) Set password OFF
2) Lock system: when setting password to lock system, all files are protected and password
is required during power on
3) Lock file: it means protecting files.
4) Modify password: the default password is 0010 for 10kHzmodel, 0030 for 30kHz model
and 0200 for 200kHz model
5) Save to USB flash disk: The password can be save to USB flash disk. The password file
name is “0010.STA”for 10kHz model, “0030.STA”for 30kHz model, “0200.STA”for
200kHz model. Plug USB flash disk into USB HOST, when a password is required during
power on, the LCR meter automatically detects the password file and read it to get
password.

- 12 -
2-5. <COMM SETUP>
Press [COMM SETUP] softkey, <COMM SETUP> page will be displayed on screen as shown below:
< COMM SETUP >
SYSTEM
SETUP
Bus Mode
BaudRate
Data Bit
Stop Bit
Parity
Tx Term
GpibAddr
CMD Type
: RS232C
: 9600
: 8
: 1
: None
: LF
: 08
: SCPI
COMM
SETUP
ABOUT
SYSTEM
Use softkeys to select
Bus Mode
Set bus mode as RS232C, GPIB, USBTMC or USBCDC.
BaudRate
Use “+”or “-”to choose baud rate from 4800, 9600, 19200, 38400, 115200.
Baud rate is only for bus mode RS232C.
Data Bit
Set data bit as 6, 7 or 8.
Stop Bit
Set stop bit as 1 or 2.
Parity
Set parity as NONE, ODD, or EVEN.
Tx Term
Set end of text term as LF, CR or LFCR.
In response to ASCII code, LF is 0x0A and CR is 0x0D.
This is only end of text term when the LCR meter is returning data to PC.
GpibAddr
Set GPIB address between 0 to 31. Input numbers via numeric keys or softkeys.
This is only for bus mode GPIB.
CMD Type
Please refer details to Programming Manual.

- 13 -
2-6. <ABOUT SYSTEM>
Press [ABOUT SYSTEM] softkey, the <ABOUT> page will be displayed on screen as shown below:
< ABOUT >
Reset
Factory
Model number:
Serial number
Firmware version
Hardware version
License
:
: xx-xxx-xxxxx
: x.x.x
: x.x.x
: Registered
DEL
Update
EXIT
Use softkeys to select
Reset
Press the softkey to restart the LCR meter.
Factory
Press the softkey to return to factory setup. Password is required.
Update
Press the softkey to update firmware through USB flash disk.
EXIT
Press the softkey to exit and return to <SYSTEM SETUP> page.
2-7. Data Storage
The measurement data can be stored to USB flash stick. In <MEAS> page, press [TOOL] key to enter into data
storage menu.
< MEAS DISP >
PrtSc
FUNC : Cp-D
RANGE : AUTO
FREQ : 1 kHz
SPEED : SLOW
SAVE
DATA
LEVEL : 1.00V
COMP : OFF
／
Cp
: -
0.0015p F
DEL
D
:
0.3697
SINGLE
SHORT
Vm:OFF
Im:OFF
SINGLE
OPEN
Use softkeys to select
There are three formats for data storage: <A>，<B> [，<COMP>]
A and B are measurement results for main parameter and secondary parameter respectively. The measurement
results are stored in the way of scientific notation.
<COMP> is comparator results. 10kHz and 30kHz models do not have handler function.
COMP
Description
COMP
Description
0
Fail
3
BIN 3pass
1
BIN 1 pass
4
AUX fail
2
BIN 2 pass
5
No comparator

- 14 -
2-8. <INTER Files List> and <EXT Files List>
The parameter settings can be saved into the internal non-volatile memory. When same parameter settings are
needed in the next measurement, user can easily upload parameter settings from the internal non-volatile
memory. No need to make settings again.
Press [File] key, the <Files List> page will be displayed. Press [File] key again to switch between internal and
external files lists.
< INTER Files List >
LOAD
I:\
Page: 1
NO
File
STORE
1
2
3
DEL
4
5
FIND
6
7
Press / to page, FILE to change I/E !
COPY TO
E:
Use softkeys to select
< EXT Files List >
LOAD
E:\
Page: 1
File/Folder
STORE
DEL
PARENT
DIR
Press / to page, FILE to change I/E !
COPY TO
I:
Use softkeys to select

- 15 -
Operation steps:
1. Read existing files
1) Use ▲and ▼keys to choose files. Or Input numbers to choose corresponding file, and then press [OK]
key to confirm.
2) Use ◄and ►keys o choose pages.
2. Save parameter to files
1) Move cursor to file number. Press [STORE] softkey to save parameter to the selected file.
2) Press [YES] softkey to continue, or press [NO] softkey to cancel operation.
3) If press [YES] softkey in step 2, input file name via numeric keys and then press [OK] to confirm. If the
file name already exists, press [Continue] softkey to cover the existing file of press [ESC] to cancel
operation.
3. Upload parameters from existing files
1) Press [File] key to switch to internal or external files list.
2) Move cursor to the file name to be uploaded from, or input file name directly.
3) Press [LOAD] softkey.
4) Press [YES] softkey to upload file.
4. Copy file to USB flash disk
1) Plug USB flash disk into USB host.
2) Move cursor to the file name to be copied, or input file name directly.
3) Press [YES] softkey to copy.
4) If the file name already exists, press [Continue] softkey to cover the existing file of press [ESC] to cancel
operation.

- 16 -
3. SPECIFICATIONS
3-1. Measurement Range
With 100Ω source resistance, there are five ranges: 31.6Ω, 100Ω, 1kΩ, 10kΩ, 100kΩ.
With 30Ωsource resistance, there are six ranges: 10Ω, 30Ω, 100Ω, 1kΩ, 10kΩ, 100kΩ.
The effective measurement range is listed as below.
Table 3-1 Effective measurement range
with 100Ωsource resistance
Table 3-2 Effective measurement range
with 30Ωsource resistance
No.
Resistance
Effective mea.range
No.
Resistance
Effective mea.range
0
100kΩ
100kΩ-100MΩ
0
100 kΩ
100kΩ-100MΩ
1
10kΩ
10kΩ-100kΩ
1
10 kΩ
10kΩ-100kΩ
2
1kΩ
1kΩ-10kΩ
2
1 kΩ
1kΩ-10kΩ
3
100Ω
50Ω-1kΩ
3
100Ω
100Ω-1kΩ
4
30Ω
0Ω-50Ω
4
30Ω
15Ω-100Ω
5
10Ω
0Ω-15Ω
3-2. Accuracy
3-2-1. Accuracy of │Z│, L, C，R, X
The accuracy (Ae) of │Z│，L，C，R，X is shown as below:
󰇟󰇛󰇜󰇠[%]
A: Basic measurement accuracy (Refer to Fig.3-1)
Ka: Impedance scaling factor (Refer to table 3-4), impedance <500Ω
Kb: Impedance scaling factor (Refer to table 3-4), impedance >500Ω
Kc: Temperature factor (Refer to table 3-5)
Kf: Calibration interpolation factor (Refer to table 4-6)
KL: Cable length factor (Refer to table 4-7)
Note: Choose only Ka or Kb, depending on resistance value. For others, input zero.
Condition for L, C, X accuracy: Dx (D measured value)≤0.1
Condition for R accuracy: Qx (Q measured value)≤0.1
When Dx≥0.1, for L, C and X, its accuracy factor Ae shall be multiplied by 

When Qx≥0.1, for R, its accuracy factor Ae shall be multiplied by 

3-2-2. Accuracy of D
The accuracy De of D is calculated according to: 
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The above formula is valid only when Dx≤0.1.
When Dx >0.1, De shall be multiplied by 󰇛󰇜