Applent Instruments AT826 User manual

!$Instruments Inc.
Address: Lanlin Dangnan Industrial Park,
Changzhou, Jiangsu, China
Post Code: 213014
Telephone (Sales):
0086-0519-88805550/
89966117/89966227/89966337
Fax: [phone]
Sales Email: [e-mail]
Tech Email: [email protected]
http://www.applent.com
©2005-2012 Applent Instruments Inc.
English
Revision A0
FIRMWARE REVISIONS
This manual applies directly
to instruments that
have the firmware
Rev. A1.x and B1.x
[AT824/825/826 Handheld LCR Meter]
User’s Guide

2
AT824/825/826 Handheld LCR Meter
Safety Summary
Warning Dangerous
Disclaimer
Applent Instruments assumes no liability for the
customer's failure to comply with these requirements.
DO NOT Operate In
An Explosive
Atmosphere
Do not operate the instrument in the presence of
inflammable gasses or fumes. Operation of any
electrical instrument in such an environment constitutes
a definite safety hazard.
DO NOT Operate In A
Damp Atmosphere
The instrument is not waterproof; keep instrument
probes
away from water, the instrument should not be
used in damp conditions.
DO NOT Open
Instrument Case
Other than replacing the old battery,
non-
professional maintenance staff do not open the
instrument case, in an attempt to repair the instruments.
DO NOT Substitute
Parts Or
Modify Instrument
Try to substitute parts or modify instrument will cause
protection failure.
Warning:
1. Do not connect probes with DC voltage or live circuits
2. Before measuring capacitors, make sure the capacitors had
been discharged.
Safety Sign;
Equipment protection by double insulation or reinforced
insulation
Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC
Do not discard in household garbage

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Unpacking and Preparation
CERTIFICATION, LIMITED WARRANTY, &
LIMITATION OF LIABILITY
Applent Instruments, Inc. (shortened form Applent) certifies that this product met its published
specifications at the time of shipment from the factory. Applent further certifies that its calibration
measurements are traceable to the People’s Republic of China National Institute of Standards and
Technology, to the extent allowed by the Institution’s calibration facility or by the calibration
facilities of other International Standards Organization members.
This Applent instrument product is warranted against defects in material and workmanship for a
period corresponding to the individual warranty periods of its component products. The warranty
period is 1 year and begins on the date of shipment. During the warranty period, Applent will, at
its option, either repair or replace products that prove to be defective. This warranty extends only to
the original buyer or end-user customer of a Applent authorized reseller, and does not apply to fuses,
disposable batteries or to any product which, in Applent’s opinion, has been misused, altered,
neglected or damaged by accident or abnormal conditions of operation or handling.
For warranty service or repair, this product must be returned to a service facility designated by
Applent. The buyer shall prepay shipping charges to Applent and Applent shall pay shipping charges
to return the product to the Buyer. However, the Buyer shall pay all shipping charges, duties, and
taxes for products returned to Applent from another country.
Applent warrants that its software and firmware designated by Applent for use with an instrument
will execute its programming instruction when properly installed on that instrument. Applent does
not warrant that the operation of the instrument, or software, or firmware, will be uninterrupted or
error free.
The foregoing warranty shall not apply to defects resulting from improper or inadequate
maintenance by the Buyer, Buyer-supplied software or interfacing, unauthorized modification or
misuse, operation outside the environmental specifications for the product, or improper site
preparation or maintenance.
THIS WARRANTY IS BUYER’S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL
OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY
IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE. APPLENT SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT,
INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES, INCLUDING LOSS OF DATA,
WHETHER ARISING FROM BREACH OF WARRANTY OR BASED ON CONTRACT, TORT,
RELIANCE OR ANY OTHER THEORY.
Applent Instruments, Inc.
Changzhou,
Jiangsu,
China,
Oct 2009 Rev.A3

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AT824/825/826 Handheld LCR Meter
Contents
Safety Summary ............................................................................................................2
CERTIFICATION, LIMITED WARRANTY, & LIMITATION OF LIABILITY.........3
Contents.........................................................................................................................4
Figure Contents .............................................................................................................7
Table Contents...............................................................................................................8
1. Unpacking and Preparation ...................................................................................9
1.1 Incoming Inspection ..............................................................................9
1.2 Power Requirements..............................................................................9
1.3 Environmental Requirements ................................................................9
1.4 Cleaning...............................................................................................10
1.5 Replace the battery ..............................................................................10
1.6 Adjust the support................................................................................11
2. Overview .............................................................................................................12
2.1 Introduction .........................................................................................12
2.2 Main Specifications and Features........................................................12
2.2.1 Measurement parameters.............................................................12
2.2.2 Equivalent Circuit........................................................................13
2.2.3 Range...........................................................................................13
2.2.4 Measurement Speed.....................................................................13
2.2.5 Basic Accuracy ............................................................................14
2.2.6 Measurement Range ....................................................................14
2.3 Test Signal ...........................................................................................15
2.3.1 Test Signal Frequency .................................................................15
2.3.2 Test Signal Level .........................................................................15
2.3.3 Output Impedance .......................................................................15
2.4 Main Functions....................................................................................15
2.4.1 Correction....................................................................................15
2.4.2 Comparator (Sorting Function) ...................................................15
2.4.3 System Setup ...............................................................................15
2.4.4 Interface.......................................................................................15
3. Startup .................................................................................................................16
3.1 Front Panel ..........................................................................................16
3.2 LCD Screen .........................................................................................17
3.3 Interfaces .............................................................................................18
3.4 External Power and Battery.................................................................18
3.4.1 Charge Li Battery ........................................................................19
3.5 Power up..............................................................................................19
3.6 Unknown Terminals Slot .....................................................................20
3.6.1 Clips and Cables:.........................................................................20
4. [MEAS DISPLAY] Page.....................................................................................21

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Unpacking and Preparation
4.1 <MEAS DISPLAY> ............................................................................21
4.1.1 Measurement Function [FUNC A] [FUNC B] ............................21
4.1.2 Test Signal Frequency [FREQ]....................................................22
4.1.3 Impedance Range [RANGE].......................................................23
4.1.4 Measurement Speed [SPEED].....................................................24
4.1.5 Equivalent Circuit [EQU]............................................................24
5. [SETUP] Page .....................................................................................................25
5.1 <SETUP> Page....................................................................................25
5.1.1 Comparator [COMP] ...................................................................26
5.1.2 [BEEP]Set....................................................................................26
5.1.3 Input Nominal Value [NOM].......................................................26
5.1.4 Input Tolerance Value [TOL].......................................................27
5.2 User Correction ...................................................................................28
5.2.1 Open Correction [OPEN CORR] ................................................28
5.2.2 Short Correction ..........................................................................29
6. [SYSTEM CONFIG] Page..................................................................................30
6.1 <SYSTEM CONFIG> page ................................................................30
6.1.1 [LANGUAGE] ............................................................................30
6.1.2 [FILE] ..........................................................................................31
6.1.3 [TOUCH PANEL] .......................................................................31
6.1.4 [BRIGHTNESS]..........................................................................32
6.1.5 DIM DISPLAY [DIM].................................................................33
6.1.6 AUTO POWER OFF [APO] .......................................................33
7. EXAMPLES........................................................................................................34
7.1 Example...............................................................................................34
8. Remote Control ...................................................................................................36
8.1 USB-HID.............................................................................................36
8.2 Programming guide .............................................................................36
8.3 Command set .......................................................................................37
8.3.1 Command packet .........................................................................37
8.3.2 Notation Conventions and Definitions ........................................38
8.3.3 Parameter types ...........................................................................39
8.4 Command Reference ...........................................................................39
8.4.1 DISP Subsystem ..........................................................................40
8.4.2 FUNC Sub System ......................................................................40
8.4.3 FREQ Sub System.......................................................................42
8.4.4 APER Speed Sub System ............................................................43
8.4.5 FETC? Sub System......................................................................43
8.4.6 COMP Comparator sub system ...................................................43
8.4.7 Correction subsystem ..................................................................44
8.4.8 SYST System Sub System...........................................................45
8.4.9 IDN? Subsystem ..........................................................................45
8.4.10 RST Subsystem............................................................................45

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AT824/825/826 Handheld LCR Meter
8.4.11 Error Subsystem ..........................................................................45
8.5 Command List .....................................................................................46
9. Specification........................................................................................................47
9.1 General Specification ..........................................................................47
9.2 Accuracy..............................................................................................48
9.2.1 C and D........................................................................................48
9.2.2 L and Q ........................................................................................50
9.2.3 Z and θ.........................................................................................51
9.2.4 ESR..............................................................................................51
9.3 Demensions .........................................................................................52

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Unpacking and Preparation
Figure Contents
Figure 1-1 Replace the battery ......................................................................10
Figure 1-2 60 Degrees Supporting ................................................................11
Figure 1-3 45 Degrees Supporting ................................................................11
Figure 3-1 Front Panel...................................................................................16
Figure 3-2 LCD Screen .................................................................................17
Figure 3-3 Interface panel .............................................................................18
Figure 3-4 Power Adapter .............................................................................19
Figure 3-5 Charging LED (Orange) ..............................................................19
Figure 3-6 Unknown Terminals.....................................................................20
Figure 4-1 <MEAS DISPLAY> Page ...........................................................21
Figure 5-1 <SETUP> page............................................................................25
Figure 5-2 To input nominal by touch screen................................................27
Figure 5-3 Stray Admittance .........................................................................29
Figure 5-4 Remaining impedance .................................................................29
Figure 6-1 <SYSTEM CONFIG> Page ........................................................30
Figure 6-2 The Brightness key......................................................................32
Figure 7-1 Example.......................................................................................35
Figure 8-1 The APPLENT USB logo in windows device manager ..............36

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AT824/825/826 Handheld LCR Meter
Table Contents
Table 2-1 Equivalent Circuit........................................................................13
Table 2-2 AT824 Measurement Range ........................................................14
Table 2-3 AT825 Measurement Range ........................................................14
Table 2-4 AT82 6 Measurement Range ........................................................14
Table 3-1 Description of the Front Panel.....................................................17
Table 3-2 LCD Screen descriptions.............................................................17
Table 3-3 Interface panel description...........................................................18
Table 4-1 Primary Parameters .....................................................................22
Table 4-2 Sub Parameters ............................................................................22
Table 4-3 Parameters descriptions ...............................................................22
Table 4-4 Auto Range and Range Hold.......................................................23
Table 4-5 Range No.....................................................................................23
Table 8-1 A complete command pack in Hex format. .................................38
Table 8-2 Notation Conventions and Definitions ........................................39
Table 8-3 Available data type ......................................................................39
Table 8-4 Magnification ..............................................................................39
Table 8-5 The Error Code and message.......................................................45
Table 8-6 All USB Commands ....................................................................46

9
Unpacking and Preparation
1. Unpacking and Preparation
!
This chapter describes how to set up and start the AT824/825/826
Handheld LCR Digital Meter.
Incoming Inspection
Power Requirement
Operation Environment
Cleaning
1.1 Incoming Inspection
1. Referring to <Packing List> in the packing box, check that all
packaged items supplied with the meter have been provided as listed
2. Check the appearance of whether there is damage or scratches
If there was damage or lack of accessories, please contact Applent
Instruments Sales Department or local agency.
1.2 Power Requirements
AC power adapter: ATL909 Rechargeable Li battery: ATL805。:
Input: 90V-260VA C , 49Hz~62Hz, <10VA
Warning: Do Not use any other power adapter or battery.
1.3 Environmental Requirements
Temperature: 0℃～55℃,
Humidity: at 23℃, <70% R.H.
Altitude: 0~2000m

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AT824/825/826 Handheld LCR Meter
1.4 Cleaning
Do not clean the inside of the equipment.
Warning: Do not use the cleaning solvent (alcohol or gasoline,
etc.) on the instrument.
Please use a clean cloth dipped in some water to do the case and panel
cleaning.
1.5 Replace the battery
The instrument built-in rechargeable lithium battery, the battery has
been installed in the battery compartment of the instrument at the
factory. You should replace the battery according to the following
procedure.
Figure 1-1 Replace the battery
1. Use a screwdriver to loosen the screws of the battery cover, remove
the battery cover.
2. Remove the plug on the old battery, plug in new battery plug.
3. Put a new battery into the battery compartment, replace the battery
cover and tighten the screws.

11
Unpacking and Preparation
1.6 Adjust the support
The support has two positions: 60 degrees and 45 degrees.
45 degrees, makes the instrument more stable.
Figure 1-2 60 Degrees Supporting
Figure 1-3 45 Degrees Supporting

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AT824/825/826 Handheld LCR Meter
2. Overview
!
This chapter contains general information about AT824/825/826 Handheld
LCR Digital Meter.
Introduction
Test Functions
Signal Source
Main Function
2.1 Introduction
Thank you for purchasing AT 824/825/826 Handheld LCR Digital Meter
AT826, 825, 824 series handheld LCR Digital electric bridge adopts high
performance 32-bit ARM microprocessor. True-color TFT liquid crystal
display, keypad and touch screen double control. Use Li- battery supply
power and USB communication. Switch in both English and Chinese.
AT826, 825 handheld LCR digital meters have the highest configuration.
With the highest frequency of 100 kHz, constant 100Ω source internal
resistance, 0.6Vrms measurement voltage level, and 0.2% accuracy, make
AT826, 825 have the excellent performance of both desktop instrument
and portability of handheld.。

Referrance Full specifications in Section 9
2.2 Main Specifications and Features
2.2.1 Measurement parameters
Main Parameters[FUNC A]: Capacitance C, Inductance L, Resistance R,
Impedance Z and Auto.
Secondary Parameters[FUNC B]: Auto, Dissipation D, Quality Q and
ESR (ESR: Equivalent series resistance)

13
Overview
2.2.2 Equivalent Circuit
Serial(Subscript s),Parallel(Subscript p)。。
Ta b le 2-1 Equivalent Circuit
Circuit Dissipation Factor D Conversion
L
Lp
Rp
D=2πFLp/Rp=1/Q
Ls=Lp/(1+D2)
Rs=RpD2/(1+
D2)
Lp Rp
D=Rs/2πFLs=1/Q
Lp=(1+D2)Ls
Rp=(1+D2)Rs
/D2
C
Cp
Rp
D=1/2πFCpRp=1/Q
Cs=(1+D2)Cp
Rs=RpD2/(1+
D2)
Cs Rs
D=2πFCsRs=1/Q
Cp=Cs/(1+D2
)
Rp=Rs(1+D2)
/D
2
Q=Xs/Rs,D=Rs/Xs,Xs=1/2πFCs=2πFLs
Tips
Typically, for low impedance components (such as high-value
capacitance and capacitance and
low inductance), use the
series equivalent circuit. Vice versa, use the parallel equivalent
circuit for the high impedance components (low capacitance
and high value of inductance).
Also take the actual usage of the component into
consideration, such as for power supply filtering capacitor
series equivalent circuit for the LC oscillator circuit, use the
parallel equivalent circuit.
2.2.3 Range
Auto and Hold range. Total 5 Ranges.
2.2.4 Measurement Speed
Fast: 4 readers per second.
Slow: 1.5 readers per second

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AT824/825/826 Handheld LCR Meter
2.2.5 Basic Accuracy
0.2%
2.2.6 Measurement Range
Ta b le 2-2 AT824 Measurement Range
Parameter
Measurement Ranger
L 0.1µH ～999.9H
C 0.1pF ～999.9mF
R、X、Z 0.0001Ω ～99.99MΩ
D 0.0001 ～9.999
Q 0.0001 ～999.9
Θd -179.99°～179.99°
Θr -3.1416 ～3.1416
% -999.9% ～999.9%
Ta b le 2-3 AT825 Measurement Range
Parameter
Measurement Ranger
L 0.01µH ～999.9H
C 0.01pF ～999.9mF
R、X、Z 0.0001Ω ～99.99MΩ
D 0.0001 ～9.999
Q 0.0001 ～999.9
θd -179.99°～179.99°
θr -3.1416 ～3.1416
% -999.9% ～999.9%
Ta b le 2-4 AT826 Measurement Range
Parameter
MMeasurement Ranger
L 0.001µH ～999.9H
C 0.001pF ～999.9mF
R、X、Z 0.0001Ω ～99.99MΩ
D 0.0001 ～9.999
Q 0.0001 ～999.9

15
Overview
θd -179.99°～179.99°
θr -3.1416 ～3.1416
% -999.9% ～999.9%
2.3 Test Signal
2.3.1 Test Signal Frequency
AT82 4: 100Hz, 120Hz and 1 kHz
AT82 5: 100Hz, 120Hz, 1 kHz and 10 kHz
AT82 6: 100Hz, 120Hz, 1 kHz, 10 kHz and 100 kHz
Frequency: Accuracy: 0.02%
2.3.2 Test Signal Level
0.6Vrms Accuracy: ±10%±2 mV
2.3.3 Output Impedance
100Ω, Accuracy: 5%
2.4 Main Functions
2.4.1 Correction
OPEN/SHORT correction:
Eliminates measurement errors due to stray parasitic impedance in the test
fixtures.
2.4.2 Comparator (Sorting Function)
One set of comparator sorting for primary parameters.
2.4.3 System Setup
Keypad Lock Function
Data Hold Function
Switch in Both Chinese and English
Data File will Be Saved Automatically
Touch Screen Setup
Power Saving Mode
2.4.4 Interface
USB Host Port:
USB high-speed mode: 48 MHz, USD-HID Protocol, ASCII Transit.

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AT824/825/826 Handheld LCR Meter
3. Startup
!
This chapter describes:
Front Panel Summery
LCD Screen
Interface
Slot and Cables
3.1 Front Panel
Figure 3-1 Front Panel

17
Startup
Ta b le 3-1 Description of the Front Panel
1
TFT-LCD Screen
2
Select Keys
3
MEAS Measurement Key——Enter Measurement Page
(Page 22: Measurement Page)
4
SYST System Key ——Enter System Setting Page
(Page 30: System Setting Page)
5
Power On/Off Battery Charging Indicator
6
5-Terminal Test Slot
7
3-Terminal Test Slot
8 Background Brightness——30%,50%,70%, 100%
Unlock the Keypad Lock
9
HOLD Data Hold Function——DH on, the data is hold in
system。
USB: SYST:HOLD <ON | OFF | 1 | 0>
10
SETUP Enter Setup (Page 25: 5 [SETUP])
3.2 LCD Screen
Figure 3-2 LCD Screen
Ta b le 3-2 LCD Screen descriptions
1
The Page Title
2
The Blue fields are label; the yellow fields are list box.
3
Primary Parameter Results
4
Sub Parameter Results
5
Help and message information
6
Function Area, Use the select keys to select
7
Comparator Results,

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AT824/825/826 Handheld LCR Meter
Green and P: Pass, Red and F: Fail
If the comparator was turned off, there’s nothing displayed.
8
Battery Percentage and Keypad Lock Indicators
3.3 Interfaces
Figure 3-3 Interface panel
1
2
3
Ta b le 3-3 Interface panel description
1
Remote Control Interface(USB-HID)
2
Beep
3
Power Adapter Jack(+9VDC)
3.4 External Power and Battery
The Battery can only be charged by Power Adapter AT L909。
While using the external power supply, the power adapter is also charging
the battery.

19
Startup
Figure 3-4 Power Adapter
3.4.1 Charge Li Battery
When the battery power is low, you could use the power adapter to charge
the battery. The Power key is orange indicating while charging the battery.
Figure 3-5 Charging LED (Orange)
Attention! The key is also orange which charging even when the LCR
meter is off previously.)
3.5 Power up
Press the Power key softly to start it.

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AT824/825/826 Handheld LCR Meter
3.6 Unknown Terminals Slot
Two Kinds of Test Slot: 3-Terminal and 5-Terminal
AT824/825/826 All Equipped with L501C Kelvin Clip
AT826 also equipped with L508B SMD Clip.
Figure 3-6 Unknown Terminals
1 The test terminal can NOT be connected into a live circuit
2 The capacitor must be discharged.
3.6.1 Clips and Cables:
Using clip or cable from other brands may cause mistakes
After a long time (1~2 Years ), the surface of the accessories may be
damaged, which will lead some inaccuracy.
Attention! Without clip or cable, the test result may not be stable.