4090A Digital LCR Meter
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Specifications:
- Type: Digital LCR Meter (Fixed Frequency)
- Measurement Modes: DCR, Electrolytic Capacitor Mode, Data
Retention, Data Recording - Calibration: Open Circuit, Short Circuit
Product Usage Instructions:
1. Installation:
Follow the installation instructions provided in the user manual
to set up the digital LCR meter correctly.
2. Brief Overview:
The digital LCR meter is designed for accurate measurement of
inductance (L), capacitance (C), and resistance (R) at a fixed
frequency.
3. Quick Reference:
3.1 The Front Panel:
Refer to the user manual for detailed information on the
functions and indicators on the front panel.
3.2 The Rear Panel:
Check the connections and ports located on the rear panel for
proper setup.
3.3 Keys:
Familiarize yourself with the function of each key for easy
navigation and operation.
3.4 Basic Operations:
Learn how to perform basic operations like power on/off, mode
selection, and parameter adjustment.
3.5 LCR Page:
Access the LCR page for specific measurements related to
inductance, capacitance, and resistance.
4. Basic Function Operation:
4.1 Measurement Conditions and Parameters:
Understand the measurement conditions and parameters required
for accurate readings.
4.2 DCR Mode:
Switch to DCR mode for measuring direct current resistance
values.
4.3 Electrolytic Capacitor Mode:
Utilize this mode for testing electrolytic capacitors.
4.4 Data Retention Function:
Use the data retention function to store measurement results for
reference.
4.5 Data Recording Function:
Enable data recording to save measurement data for further
analysis.
4.6 Calibration:
Perform calibration using the open circuit and short circuit
methods as outlined in the manual.
5. System Settings:
5.1 SYSTEM SET Page:
Access the system settings page for customizing parameters and
preferences.
5.2 System Parameters:
Adjust system parameters such as display settings and units as
needed.
6. Comparator:
6.1 Comparator Parameter Setting:
Configure the comparator settings for comparison purposes.
6.2 Sorting Mechanism:
Understand how the sorting mechanism works for organizing
measurement data.
7. List Scan:
Explore the list scan feature for scanning through multiple
measurements efficiently.
Frequently Asked Questions (FAQ):
Q: How do I calibrate the LCR meter?
A: Calibration instructions can be found in section 4.7 of the
user manual, which includes open circuit and short circuit
calibration methods.
Q: Can I measure inductance, capacitance, and resistance
simultaneously?
A: Yes, the LCR meter allows for simultaneous measurement of
inductance (L), capacitance (C), and resistance (R) at a fixed
frequency.
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Digital LCR Meter User’s Manual
( Fixed Frequency)
Contents
1 Install………………………………………………………………………………………………………………………..1
2 Brief………………………………………………………………………………………………………………………….2
3 Quick reference………………………………………………………………………………………………………….3
3.1
The front panel…………………………………………………………………………………………….3
3.2
The rear panel……………………………………………………………………………………………..4
3.3
Keys…………………………………………………………………………………………………………… 4
3.4
Basic operations…………………………………………………………………………………………..4
3.5
LCR page……………………………………………………………………………………………………..5
4 Basic function operation………………………………………………………………………………………………6
4.1
Measurement conditions and parameters………………………………………………………..6
4.2
DCR mode……………………………………………………………………………………………………9
4.3
Electrolytic capacitor mode……………………………………………………………………………9
4.4
function………………………………………………………………………………………………….10
4.5
Data retention function……………………………………………………………………………….10
4.6
Data recording function……………………………………………………………………………….10
4.7
Calibration………………………………………………………………………………………………… 10
4.7.1 Open circuit calibration…………………………………………………………………………11
4.7.2 Short circuit calibration…………………………………………………………………………11
5 System settings…………………………………………………………………………………………………………11
5.1
SYSTEM SET page………………………………………………………………………………………..11
5.2
System parameters……………………………………………………………………………………..12
6 Comparator……………………………………………………………………………………………………………..13
6.1
Comparator parameter setting……………………………………………………………………..13
6.2
Sorting mechanism……………………………………………………………………………………..14
7 List scan…………………………………………………………………………………………………………………..16
7.1
Parameter setting and operation…………………………………………………………………..16
8 Characteristics………………………………………………………………………………………………………….17
8.1
Basic accuracy…………………………………………………………………………………………….17
8.2
Accuracy diagram……………………………………………………………………………………….19
8.3
DCR measurement accuracy…………………………………………………………………………19
8.4
Excitation source………………………………………………………………………………………..20
8.4.1 frequency…………………………………………………………………………………………..20
8.4.2 level…………………………………………………………………………………………………..20
8.4.3 Bias……………………………………………………………………………………………………20
8.4.4 Output impedance……………………………………………………………………………….20
9 External interface instructions…………………………………………………………………………………….20
9.1
The USB interface……………………………………………………………………………………….20
9.2
RS232 interface…………………………………………………………………………………………..20
9.3
Handler interface………………………………………………………………………………………..20
10
SCPI Command reference……………………………………………………………………………………22
11
Precautions and warranty……………………………………………………………………………………22
Desktop LCR meter User’s Manual(Fixed frequency)
1 Install
This chapter describes some of the checks you must make after you receive the instrument, and the conditions you must know and have before you install it.
1.1Unpacking
Thank you for buying and using our products. After unpacking, you should first check whether the
instrument is damaged due to transportation. We do not recommend you to power the instrument under
the condition of appearance damage.
Confirm that the bridge is attached with the following accessories. Optional accessories need to be
ordered separately. If any items are missing, please contact the nearest sales office.
The standard accessories:
Optional accessories:
A kelvin clamp.
RS232 cable.
A power cord.
USB cable.
A user manual.
Handler cable
1.2Power supply
1Voltage: AC220V±10% or AC110V ±10%, optional. 2Frequency: 45Hz-65Hz.
Warning: in order to prevent leakage of electricity from harming the instrument or people, the user must ensure that the earth wire of the power supply is connected to the earth reliably.
1.3Fuse
The instrument is factory fused, users should use the company’s fuse.
1.4Surrounding environment
1Please do not use in the environment with many dust, vibration, direct sunlight and corrosive gas. 2The normal operating temperature of the instrument is 0-40 , and the working humidity is 15%85% RH. 3 The instrument has been carefully designed to reduce the clutter caused by AC power input, however, it should still be used in a low-noise environment as far as possible. If it cannot be avoided, please install a power filter. 4 Keep away from strong electromagnetic field during instrument measurement, so as to avoid interference to the measurement.
1.5Use Kelvin clamp
Please use the Kelvin clamp provided by our company. The Kelvin clamp and the pin of the tested part should be kept clean to ensure the good contact between the tested part and the Kelvin clamp.
The Kelvin clamp is connected to the four test terminal of Hcur, Hpot, Lpot and Lcur in the front panel of the instrument. For a test part with a shielded case, the shield may be connected to the earthing terminal of the front panel of the instrument. Two terminals of Hcur and Hpot are connected to the red clamp, while two terminals of Lpot and Lcur are connected to the black clamp.
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1.6Warm-up
1 In order to ensure the accurate measurement of the instrument, the startup warm-up time should be no less than 30 minutes.
2Do not turn on and off the power of the instrument frequently, which may cause internal data confusion.
1.7Other characteristics of the instrument
1Power: Less than 20W. 2Dimensions: 265mm×105mm×305mm(width × height ×length).
2 Brief
This series digital bridge adopts 3.5-inch LCD, has friendly user interface and various measurement functions, supports multiple test frequencies and test levels, with basic accuracy up to 0.1%. USB and RS232 can facilitate remote operation. The Handler interface facilitates the automatic sorting of components.
This manual takes “C Type”(100kHz) as an example.
2.1Basic features
Measuring frequency up to 100 kHz. Level range (100-2000) mVrms. Internal bias voltage (0-1500) mV. Automatic identification of component type. Range can be automatically or locked. Support DC resistance, electrolytic capacitance measurement. Basic accuracy 0.1%. Support open, short calibration. Data recording function. 3.5-inch LCD, support English and Chinese interface. USB, RS232 communication interface, support SCPI communication protocol. Handler interface, support comparator sorting, list scan. Table 2-1
Model
4090A Type
4090B Type
4090C Type
Excitation source frequency (Hz)
10 points1001202 004008001k2k 4k8k10k
12 points100120200 4008001k2k4k 8k10k15k20k
16 points1001202004 008001k2k4k8k 10k15k20k40k50k 80k100k
Digits
Main parameter: 5 digits; secondary parameter: 5 digits
Parameter
Main parameter: L/C/R/Z; secondary parameter: X/D/Q//ESR
Range(L)
0.001H – 9999H
Range(C)
0.001pF – 9999F
Range(R)
0.0001 – 99.99M
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Basic Accuracy 0.1%
Measurement Display Speed
2 times/second (slow), 5 times/second (medium speed), 10 times/second (fast)
Internal Bias
0-1500mV adjustable, 1mV stepping
Test Level(Vrms) 100mV300mV600mV1000mV1500mV2000mV
Correction Function
Open circuit correction, short circuit correction
Screening function
Tolerance range: -100% ~ +100%, with fixed points of 10%, 25% and 50%
Selection comparator
of Five gear sorting, third gear qualified, one gear failed, one ancillary gear
Communication Standard configuration: USB, RS232 (or 485), Handle interface; Optional:
Interface
GPIB, USB Host
Others
Support DCR, electrolytic capacitor measurement mode, adjustable backlight brightness, optional in English and Chinese
3 Quick reference
3.1The front panel
Table 3-2
number 1 2 3 4
Figure 3-1Front panel schematic
instructions The power switch 3.5-inch LCD. Grounding and test terminals. Basic function keys.
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3.2 The rear panel
Table 3-3 number
1 2 3 4 5
Figure 3-2 Rear panel schematic
instructions Power supply plug base and fuse case. Voltage selector. RS232 interface. USB Device interface. Handler interface
3.3Keys
3.3.1 Power switch
Power switch: Press down to power on and pop up to power off.
3.3.2 The direction keys
Left and right direction keys to control cursor movement, up and down direction keys to select parameters.
3.4 Basic operations
1) Slide the voltage selector to select the voltage consistent with the power supply to be used. Example: the power supply to be used is 220V AC power, select the voltage selector to display 220V.
2) Connect the power supply. 3) Connect Kelvin clamp. Two terminals of Hcur and Hpot are connected to the red clamp, while two
terminals of Lpot and Lcur are connected to the black clamp. 4) Press down the power switch, LCD of front panel light up. 5) Power on the default into the LCR measurement page. See figure 3-3. Where “–OL–” means the
measurement data over the range. 6) Connect part to be measured to the kelvin clamp and start the measurement. Example: connect the
resistance of about 1K to the kelvin clamp, and the page is shown in figure 3-4.
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Figure 3-3
3.5 LCR page
Figure 3-4
Figure 3-5 LCR page 1 Page title
Used to identify the page to display. LCR, DCR, ECA, COM SET, SYSTEM SET, LIST SCAN 6 pages. The measurement page in the document refers to the pages of LCR, DCR, ECA. 2 Measurement conditions and parameter 3 Measurement result display Main parameter is Rp, said parallel equivalent models to measure resistance, the measured results is 999.4 ; Secondary parameter is X , said the reactance, measuring result is 0.0567 . 4 The message column The LOCAL/REMOTE identification is displayed in the far right of the message column. The switch between local and remote needs to be carried out by SCPI command. In remote mode, the keyboard cannot be used. The instrument starts in local mode by default.
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4 Basic function operation
4.1 Measurement conditions and parameters
4.1.1 Function
Figure 4-6 Cp-D is displayed at the FUNC, as shown in figure 4-1. The first character “C” is the main parameter, represents capacitance measurement; the second character “p” represents parallel equivalent model; the last character “D” is the secondary parameter, represents loss factor.
4.1.1.1 Main parameter
The main parameters include AUTO, L (inductance), C (capacitance), R (resistance) and Z (impedance).
When selecting AUTO, the instrument will automatically judge whether the measurement is L, C or R according to the measured data. In this case, the secondary parameter cannot be set and the fixed combination is R-X, C-D and L-Q. The equivalent model is automatically switched according to the measurement data.
In the measurement page, Press
key to switch to the next main
parameterAUTORCLZ, Loop switching.
4.1.1.2 Equivalent model
Equivalent models include s (series) and p (parallel).
The actual inductance, capacitance and resistance are not ideal pure reactance or resistance parts.
They are usually presented as a composite impedance element. Herein, the part to be measured is
equivalent to a simple series or parallel model of two elements, then performs measuring and
calculating.
Series/parallel model
capacitanceC Series schematic
Parallel schematic
inductanceL Series schematic
Parallel schematic
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resistanceR Series schematic
Parallel schematic
Note: generally, the series equivalent model is used for low impedance parts and the parallel equivalent model is used for high impedance parts.
In the measurement page, Press
key to switch the equivalent modelsp.
4.1.1.3 Secondary parameter
The secondary parameters include X (reactance), D (loss factor), Q (quality factor), (impedance
Angle), and ESR (equivalent series resistance).
In the measurement page, Press
key to switch to the next secondary
parameterXDQESR, Loop switching.
4.1.2 Level
There are two ways to set the level.
Method one:
In the LCR page, move the cursor to the LEVEL item with the left and right keys, and then switch to
the previous or next level point by pressing the up and down
keys100mV300mV600mV1V1.5V2V, Loop switching.
Method two:
In the LCR page, press
4.1.3 Bias
key to quickly switch to the next level point, Loop switching.
In the LCR page, move the cursor to the BIAS item with the left and right keys, press enter the input state. The page is shown in figure 4-2.
key to
Figure 4-7
Figure 4-8
Display in the BIAS a current bias set (For example, if the front bias is 1V, the bias in the field is
1000mV), Select the numeric digit to be changed by left and right keys, and the selected digit will be
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displayed in reverse. Change the value of the digit by up and down keys (up keys +1, down keys-1). Press
the key
to exit after setting.
4.1.4 Frequency
There are two ways to set the frequency.
Method one:
In the measurement page, move the cursor to the FREQ item with the left and right keys, and then
switch to the previous or next frequency point by pressing the up and down keysThe fixed frequency
point are:100Hz120Hz200Hz400Hz800Hz1k2k4k8k10k15k20k40K50K80K100K,
Loop switching. The page is shown in figure 4-3.
Method two:
In the measurement page, press
key to quickly switch to the next frequency point, Loop
switching.
4.1.5 Range
Instrument range can be set to automatic(AUTO) or locked(LOCK). When the measuring range is set
to automatic, the instrument will automatically adjust the appropriate measuring range according to the
impedance of the part to be measured. When locked, the range is locked at the current range.
In general, it is recommended to use automatic range. Range locked is used for batch testing in the
factory to save the stable time of range switching. The usage is as follows: measure one of the part in the
range automatically, then lock it in the current range and start batch measurement.
There are two ways to set the range.
Method one:
In the measurement page, move the cursor to the RANGE item with the left and right keys, and then switch by pressing the up and down keysLOCKAUTO.
Method two:
In the measurement page, press
key to quickly switch.
4.1.6 Output impedance
The output impedance is the output impedance of the excitation source, the instrument provides
two choices: 30 and 100 . By default, the output impedance is 100 .
When output impedance select 30 and the measured impedance is small, overcurrent may occur.
As shown in figure 4-4, the main parameter location “– OC–“.
In the measurement page, move the cursor to the ROUT item with the left and right key, then by up
and down key switch output impedance (30 100 ).
Figure 4-9
Figure 4-10
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4.1.7 Speed
There are two ways to set the measurement speed. Method one:
In the measurement page, move the cursor to the SPEED item with the left and right keys, and then switch to the next speed point by pressing the up and down keysFASTMEDSLOW, Loop switching. Method two:
In the measurement page, press
4.2DCR mode
key to switch to the next speed point, Loop switching.
Press
key enter DC resistance measurement mode and press again to exit. The page is
shown in figure 4-5. The level, bias and frequency cannot be changed in DC resistance measurement mode.
DC resistance mode measures the DC impedance of coils, transformers, etc.
Figure 4-11
4.3Electrolytic capacitor mode
Figure 4-12
Press
key enter electrolytic capacitor mode and press again to exit. The level and bias
cannot be changed in electrolytic capacitor mode. The page is shown in figure 4-6.
It is necessary to pay attention to the connection polarity of electrolytic capacitor to be measured.
The red clamp is connected to the positive electrode of electrolytic capacitor; the black clamp is
connected to the negative electrode of electrolytic capacitor.
4.4 function
In the measurement page, Press
key to turn on/off the function.
When the function is turned on, the instrument records the main parameter of the measured value at the time of turning on as the reference value and displays it at the position of the secondary parameter. The position of the main parameter displays the difference between the current measured value and the reference value. The page is shown in figure 4-7.
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4.5Data retention function
Press
key to turn on the data retention function, as shown in figure 4-8, the red “HOLD” is
displayed in the upper right corner of the page and flashes, and the page data remains unchanged. Press
key again to turn off the data retention function.
Figure 4-13
Figure 4-14
4.6Data recording function
Press
key to show maximum, Press again cancel display. Press
key to show
minimum, Press again cancel display. Press
key to show average. Press again cancel display. The
page is shown in figure 4-9. The third column of the message column displays MAX (maximum value),
MIN (minimum value), AVG (average value) label and data units, and the fourth column displays the corresponding data. The message column data in figure 4-9 shows that the maximum value is 1.5818pF, which is the maximum value of all measured data (main parameter) from the moment when the key
is pressed down to the current.
4.7 Calibration
Open and short circuit calibration is used to eliminate the measurement error introduced by the distributed parameters of the instrument and fixture. Open-circuit calibration is usually performed before large impedance measurements and short-circuit calibration before small impedance measurements. If accurate measurements will be made, it is recommended to perform open and short circuit calibration prior to measurement.
4.7.1 Open circuit calibration
Open the test clamp (red and black clamps are not connected to any element). Stay away from
human body and interference source more than 10 cm. Press
key to enter calibration, the page is
shown in figure 4-10. As the calibration progresses, the right side number is automatically reduced by 1
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until it is reduced to 0. When calibration is completed, the beep will give a alert and then automatically return to the measurement page.
Figure 4-15
4.7.2 Short circuit calibration
Figure 4-16
Short circuit the test clamp (red and black clamps together), Press
key to enter calibration,
The system automatically identifies open circuit, short circuit, both are not: display blank, two beeps of notes ,The page is shown in figure 4-11, As the calibration progresses, the right side number is automatically reduced by 1 until it is reduced to 0. When calibration is completed, the beep will give a alert and then automatically return to the measurement page.
5 System settings
5.1SYSTEM SET page
In the measurement page. Press the key
to enter the SYSTEM SET page. The SYSTEM SET page
has two pages, see figure 5-1 and figure 5-2. Left and right keys can move the cursor and turn pages.
Press
again to exit the SYSTEM SET page.
Figure 5-17
5.2 System parameters
Figure 5-18
The options of system parameters is shown in the table below.
Table 5-4
Items
Options
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Language Brightness Power on Beep TRIG source PASS tone FAIL tone
5.2.1 Language
/English 30%,50%,70%,100% Default set, Last set OFF / ON INT, MAN, EXT Long, Short, Off Long, Short, Off
Move the cursor to “Language” item by left and right keys, and select language (English, ) by up
and down keys.
5.2.2 Brightness
Move the cursor to “Brightness” item by left and right keys, and select backlight brightness (30%, 50%,
70%, 100%) by up and down keys. Loop switching.
5.2.3 Power on
Move the cursor to “Power on” item by left and right keys, and select power on (Default set, Last set)
by up and down keys.
When the power on is set to the Last value, the function, level, frequency, bias, range, output
impedance and measurement speed of the measurement page are the setting parameters when the
power off. If “Power on” is set to the Default set, these parameters revert to the default value.
5.2.4 Beep
Move the cursor to “Beep” item by left and right keys, and switch beep (OFF, ON) by up and down keys.
When switch beep on, a beep with a key (a short sound), switch beep off, no beep with a key. This
parameter mainly controls the beep of the key, and has no effect on beep of notes and alerts.
5.2.5 TRIG source
Move the cursor to the “TRIG source” item by left and right keys., then switch the trigger source (INT,
MAN, EXT) by the up and down keys. Loop switching.
When set as INT, trigger signal is generated inside the instrument. When the trigger source is set to
MAN, press the “TOL%” key of the front panel to generate a trigger signal manually. When the trigger
source is set to EXT, the Handler interface receives the trigger signal. Every time it is triggered, the data is
updated.
When the trigger source selects MAN or EXT, exit SYSTEM SET and return to the measurement page,
as shown in figure 5-3. The trigger mode is displayed in the first column of the message column, which
represents MAN trigger. Press the “TOL%” key of the front panel each time to generate a trigger signal
and then update the result data. A blank or last measured value is displayed at the page before the data
is updated.
Figure 5-19
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5.2.6 PASS tone
Move the cursor to the “PASS tone” item with the left and right keys, then switch the PASS tone style (Long, Short, Off) by the up and down keys. Loop switching. Each trigger signal with one beep, long style for 80 ms, short for 20 ms.
5.2.7 FAIL tone
Move the cursor to the “FAIL tone” item with the left and right keys, then switch the FAIL tone style (Long, Short, Off) by the up and down keys. Loop switching. Each trigger signal with one beep, long style for 80 ms, short for 20 ms.
6 Comparator
The comparator function is used for inspection of warehousing, and for the measurement, discrimination of components on production line. Together with the use of Handler interface, make it suitable for automatic sorting measurement system.
6.1 Comparator parameter setting
6.1.1 Nominal value
Step 1: In the measurement page, place the reference part on the instrument test clamp for measurement.
Step 2: Press
key to enter the COM SET page, the cursor position defaults to the “Nom”
item, Nominal value obtained by taking 4 significant digits of reference part’s value. If the nominal value needs to be adjusted, move the cursor to the “Nom” item with the left and right
key and press the key
to enter input state, Select the numeric digit to be changed by left and right
keys, and the selected digit will be displayed in reverse. Change the value of the digit by up and down
keys (up keys +1, down keys-1). Press the key
to exit after setting.
Note: every time you enter the COM SET page, the nominal value will be updated according to the current measurement value.
6.1.2 Comparator switch
Method one: In the COM SET page, move the cursor to the “Comp” item with the left and right keys, and then ON/OFF the comparator by the up and down keys. Method two: In the measurement page, move the cursor to the “Comp” item with the left and right keys, and then ON/OFF the comparator by the up and down keys.
6.1.3 Tolerance
Method one: Use the left and right keys to move the cursor to the Low and High limits of the set classification
row(1, 2, 3, 2nd), press up and down keys to select the next tolerance point..-50%-25%10%0%10%25%50%. Loop switching.
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Figure 6-20 Method two: Use the left and right keys to move the cursor to the Low and High limits of the set classification row(1, 2,
3, 2nd), press
to enter input state. set range : -99.99%~+99.99%, resolution :0.01% . Setting
method can refer to bias input state setting.
Note: Press the key
to store currently setting. and the setting after power down is not lost.
6.2 Sorting mechanism
The machine provides five levels (BIN:1, BIN:2, BIN:3, BIN:AUX, BIN:OUT) for sorting. The sorting process is shown in figure 6-2. P is the main parameter of the measurement result, Pn_L is the low limit of the main parameter of n level (n=1,2,3), Pn_H is the high limit of the main parameter of n level (n=1,2,3), 2nd is the measurement result of the secondary parameter, 2nd_L is the low limit of the secondary parameter, and 2nd_H is the high limit of the secondary parameter.
When the main parameter of the measurement results meets the first level and the secondary parameter passes, the sorting result is BIN:1.
When the measurement results show that the main parameter does not meet the first level, but the second level, and the secondary parameter passes, the sorting results are BIN:2.
When the measured results show that the main parameters do not meet the first and second levels, but meet the third level, and the secondary parameters passes, the sorting results are BIN:3.
When the main parameters of measurement results do not meet the first, second and third levels, the sorting results are BIN:OUT.
When the main parameters of the measured results meet the first, second or third levels, and the secondary parameters does not pass, the sorting result is BIN:AUX.
When the comparator is opened, the sorting results are displayed on the measurement page, as shown in figure 6-3. At the same time, the sorting results are output through the Handler interface.
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Figure 6-21
Figure 6-22 If the result of sorting is BIN:1, BIN:2, BIN:3, BIN:AUX file, the beep alert will prompt according to the PASS tone setting in the system setting. If the sorting result is BIN:OUT, a beep alert will prompt according to the FAIL tone setting in the system Settings.
7 List scan
The list scan function is mainly used to test the same part at different frequencies.
7.1 Parameter setting and operation
Step 1: Enter the LIST SCAN page. In the LCR page, move the cursor to LIST item with the left and right keys, as shown in figure 7-1.
Press the up and down keys to enter the LIST SCAN page, as shown in figure 7-2. Note: When the FUNC item is AUTO, the LIST SCAN page cannot be entered.
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Figure 7-23
Figure 7-24
Step 2: Set the scan mode.
On the LIST SCAN page, move the cursor to “Mode” item with the left and right keys, and switch
modes by the up and down keys.
There are two modes, Seq and Step.
With the setting Seq, each start signal will automatically complete all measurement and comparison
of sequence number 1-7.
With the setting Step, each start signal completes the measurement and comparison of the current
sequence number. The current sequence number increased by 1 (if the current sequence number is 7,
the sequence serial number becomes 1).
Step 3: Set parameters.
The parameters that can be set for each sequence number include frequency, high limit and low
limit.
Setting of Low and High limits: As shown in figure 7-3, move the cursor to the high or low limit field
to be set and press the key
to enter input state. Select the numeric digit to be changed by left and
right keys, and the selected digit will be displayed in reverse. Change the value of the digit by up and
down keys (Up key value increases by 1, down key value decreases by 1). Press the key
to exit after
setting. In the non-input state, press the up and down key to disable the field and display as “——–“.
Figure 7-3
Figure 7-4
The frequency setting is consistent with the frequency setting of the measurement page. In the non-
input statea disable option is added to the frequency options and displayed as “——-“.
Step 4: Start scan.
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It can be started by the external signal line (trigger signal of Handler) or by pressing the key
. In this case, the internal trigger source(INT) is used, regardless of the TRIG source setting in SYSTEM SET page.
After each measurement and comparison, the measurement value and comparison result are displayed on the right side of the current sequence number row, as shown in Figure 7-4.
The comparison result is I, the measured value is within the low and high limits. The comparison result is H, the measured value is higher than the high limit. The comparison result is L, the measured value is lower than the low limit. Note: when the frequency field is set to disable option, the current sequence number will be skipped directly. If both the high and low limits are in the disable state, there is no comparison result, which is displayed as “–“. Step 5: Output the scanning result in the Handler interface. The list scan results can be output through the Handler. The comparison results of sequence number 1, 2, 3 and 7 can be directly output through the Handler. At the same time, the overall scan results of sequence number 1-7 can also be output through the Handler. At this time, as long as comparison results of H and L appear in sequence number 1-7, it will be judged as the overall unqualified. Clear all scan results each time the measurement of sequence number 1 is started. See 9.3 Handler interface for specific output signals and pins. The list scan result can also give the beep prompt, the comparison result is I, and the beep prompt is based on the PASS tone setting; the comparison result is H, L, the beep prompt is based on the FAIL tone setting. The overall scan result are given in Seq mode, and the comparison results of current sequence numbers are given in Step mode. Step 6: Exit the LIST SCAN page. In the LIST SCAN page, move the cursor to the “LIST” item with left and right keys, and exit the LIST SCAN page by the up and down keys.
8 Characteristics
8.1 Basic accuracy
The following data were measured under the following conditions: Temperature condition:23±5 Humidity conditions: 65% R.H. Calibration: open circuit and short circuit calibration before measurement Warm-up time: >30 minutes C 0.10%*(1+ Cx/Cmax+ Cmin/Cx )(1+Dx)(1+ks+kv+kf) L 0.10%*(1+ Lx/Lmax+ Lmin/Lx )(1+1/Qx)(1+ks+kv+kf) Z 0.10%*(1+ Zx/Zmax+ Zmin/Zx )(1+ks+kv+kf) R 0.10%*(1+ Rx/Rmax+ Rmin/Rx )(1+Qx)(1+ks+kv+kf) D ±0.0010*(1+ Zx/Zmax+ Zmin/Zx )(1+Dx+Dx*Dx)(1+ks+kv+kf ) Q ±0.0010*(1+ Zx/Zmax+ Zmin/Zx )(Qx+1/Qx )(1+ks+kv+kf )
Among them: 1L, C, R and Z are relative errors. D, Q are absolute errors. 2Where the subscript is x, is the measured value of this parameter; where the subscript is Max, is the maximum value; and min is the minimum value. 3Ks is the speed factor, kv is the voltage factor and kf is the frequency factor.
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The maximum and minimum values of measurement parameters that affect accuracy, as shown in
the following table.
Table 8-5
frequenc 100 120 200 400 yHz Cmax 15.9 13.25 7.95 3.98 Cmin 15.9 13.25 7.95 3.98 Lmax 159 132.5 79.5 39.8 Lmin 159 132.5 79.5 39.8 Z/Rmax Z/Rmin
800 1K
1.99 1.59 1.99 1.59 19.9 15.9 19.9 15.9 100000
100
2K
0.795 0.795 7.95 7.95
4K
0.398 0.398 3.98 3.98
8K
0.199 0.199 1.99 1.99
frequenc yHz Cmax
Cmin
Lmax
Lmin
10K
0.159 0.159 1.59 1.59
15K
0.106 0.106 1.06 1.06
20K
0.0795 0.0795 0.795 0.795
40K
0.0398 0.0398 0.398 0.398
50K
0.0318 0.0318 0.318 0.318
80K
0.0199 0.0199 0.199 0.199
100K
0.0159 0.0159 0.159 0.159
Z/Rmax Z/Rmin
100000 100
Where, the unit of Cmax is uF; The unit of Cmin is nF. Lmax is in H; The unit of Lmin is mH.
Zmax/Rmax ,Zmin/Rmin unit is ;
Measurement speed factor ks:
speed ks
slow middle
0
1
Measurement Frequency factor kf:
freqHz 100-1K 2K-10K
fast 3
15K 20K 40K-100K
kf
0
0.5
Measurement level error factor kv:
levelmV 100 300 600
kv
9
3
1
1000 0
1
1500 1
4
2000 2
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8.2 Accuracy diagram
Figure 8-25 1Vrms, slow measurement.
8.3 DCR measurement accuracy
Range 100M 20M 10M
4M 400k 40k
4k 400 40
4 0.4
Display range 20.00M-99.99M 10.00M-20.00M 4.000M-9.999M 400.0k-3.9999M 40.00k-399.99k 4.000k-39.999k 400.0-3.9999k
40.00-399.99 4.000-39.999 0.400-3.999 0.000-0.399
Accuracy Re 10.0%+20 count 5.0%+10 count
2.0%+5 count 1.2%+3 count 0.3%+3 count 0.2%+2 count 0.1%+2 count 0.2%+2 count 0.3%+3 count 1.0%+5 count 3.0%+10 count
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8.4 Excitation source
8.4.1 frequency
10Hz-100kHz, ±0.02% of reading
8.4.2 level
100mVrms-2000mVrms ,±10% of reading
8.4.3 Bias
0mV-1500mV, ±(5% of reading+20mV)
8.4.4 Output impedance
100/30 ±1% of reading
9 External interface instructions
9.1The USB interface
USB communication interface to achieve online communication with the computer. (reference SCPI part of communication protocol).
9.2RS232 interface
9.2.1 RS232C interface introduction
Using asynchronous serial communication, the serial interface of the instrument is not strictly based
on RS-232 standard, but only provides a minimal simplified subset. As shown in table 9-1, sending and
receiving data is relative to the machine.
Table 9-6
Single
Abbreviations
Pin
Send
TXD
3
Receive
RXD
2
Ground
GND
5
RS232C connector use black DB9 hole standard socket, pin sequence is shown in figure 9-1:
Figure 9-26 Note: To avoid electrical shock, switch off the power when you plug and unplug the connector Note: Do not arbitrarily short connect the output terminal, or short connect with the housing, so as to avoid damage to the instrument.
9.3 Handler interface
The desktop bridge provides the user with a Handler interface that supports the output of the comparator sorting results and the output of the list scan results.
9.3.1 Technical description
Output signal: low effective, open collector output, Opto-couplers isolation. Input signal: Opto-couplers isolation DC power supply voltage supported by power pin: 3V-25V
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9.3.2 Pin definition
Figure 9-27
The Handler interface uses blue DB9 hole standard socket, specific pin definitions and locations, as
shown in figure 9-2 and table 9-2.
The following table “/” separates the output signals of the comparator and the list scan. If the
comparator and the list scan have the same signal name, there is only one signal name.
Table 9-7
pin name
attribute Describe
1
nBIN1
Output Comparator function, result output, BIN:1;
List scan function, result output of sequence number 1. if the
comparison result is H or L, then output effective signal.
2
nBIN3
Output Comparator function, result output, BIN:3;
List scan function, result output of sequence number 3. if the
comparison result is H or L, then output effective signal.
3
nAUX_BIN/ Output Comparator function, result output, BIN :AUX;
nBIN7
List scan function, result output of sequence number 7. if the
comparison result is H or L, then output effective signal.
4
nEXT_TRIG Input External trigger signal, rising edge trigger. The high level voltage
should be consistent with the external DC power source.
5
EXTCOM1 Ground Reference ground for external DC power supply and output
signal.
6
nBIN2
Output Comparator function, result output, BIN:2;
List scan function, result output of sequence number 2. if the
comparison result is H or L, then output effective signal.
7
nOutOfBINs Output Comparator function, result output, BIN:OUT;
List scan function, Overall comparison result, After startup, as
long as one result of all sequence numbers is H or L, output
effective signal.
8
nEOM
Output End of Measurement signal.
9
EXTDC1
Power External DC power source. Reference ground is EXTCOM1
9.3.3 Sequence diagram
Table 9-8 Time T1 T2 T3 T4
.
Figure 9-28
The minimum value 1ms —Time of measurement 0
The largest number —Time of measurement Time of measurement +1ms —-
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The value of one measurement time in the table is judged by the speed, for example, non-DCR mode, slow speed, and one measurement time is 0.5s.
10 SCPI Command reference
A little. (If necessary, please contact the manufacturer to ask for it.)
11 Precautions and warranty
11.1 Packaging
The measuring instrument should be packed with plastic bags together with accessories, spare parts, instruction manual and product qualification certificate in the strong packing case which is dustproof, shockproof and moisture-proof.
11.2 Transportation
The measuring instrument should be handled carefully in the transportation process, and be protected against moisture and rain.
11.3 The storage
The measuring instrument should be stored in the ventilation room with ambient temperature of 5-40 and relative humidity of 15% to 85%RH. The air should not contain harmful impurities that corrode the measuring instrument.
11.4 The warranty
This instrument maintenance must be professional and technical personnel, otherwise the instrument damage or precision loss does not belong to the scope of warranty.
Please do not replace the internal components of the instrument during maintenance. The instrument must be re-measured and calibrated after maintenance.
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Documents / Resources
 |
technica 4090A Digital LCR Meter [pdf] User Manual 4090A, 4090B, 4090C, 4090A Digital LCR Meter, 4090A, Digital LCR Meter, LCR Meter |