Applent Instruments AT528 User manual

!$Instruments
Address: Lanlin Dangnan Industrial Park,
Changzhou, Jiangsu, China (PRC)
Post Code: 213014
Telephone (Sales):
0086-0519-88805550 / 89966117/89966227
Fax: [phone]
Sales Email: [e-mail]
Tech Email: [email protected]om
http://www.applent.com
http://www.applent.en.alibaba.com
©2005-2012 Applent Instruments, Inc.
Rev.B0
FIRMWARE REVISIONS
This manual applies directly to instruments that
have the firmware RevE1.0
[
AT528/AT528L Handheld AC Ohmmeter
]
User’s Guide

2
AT528/528L User's Guide
Safety Summary
Warning Dangerous:
Disclaimer
Applent Instruments assumes no liability for the
customer's failure to comply with these requirements.
Ground Instrument To prevent electric shock, please ground the instrument.
DO NOT Operate In
An Explosive
Atmosphere
Do not operate the instrument in the presence of
inflammable gasses or fumes. Operation of any
electri
cal instrument in such an environment constitutes
a definite safety hazard
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: Do not connect probes with DC voltage or live
circuits
Warning: Before
Test capacitor, make sure that the
capacitor has 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

3
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.A

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AT528/528L User's Guide
Contents
Safety Summary 2
CERTIFICATION, LIMITED WARRANTY, & LIMITATION OF LIABILITY 3
Contents...................................................................................................................................................................4
1.Unpacking and Preparation 6
1.1 Incoming Inspection.........................................................................................................................6
1.2 Power Supply...................................................................................................................................6
1.3 Working Environment......................................................................................................................6
1.4 Cleaning...........................................................................................................................................6
1.5 Replace Battery................................................................................................................................7
1.6 Adjust Support.................................................................................................................................7
2.Overview 9
2.1 Introduction......................................................................................................................................9
2.2 Functional Comparison AT528 and AT528L....................................................................................9
2.3 Main Specifications and Features.....................................................................................................9
2.4 Main Functions ..............................................................................................................................10
2.4.1 Correction ...........................................................................................................................10
2.4.2 Comparator (Sorting Function) ...........................................................................................10
2.4.3 System Setup.......................................................................................................................10
2.4.4 Remote Control...................................................................................................................10
3. Startup 11
3.1 Front Panel Summery.....................................................................................................................11
3.2 Interfaces........................................................................................................................................11
3.3 Power Supply.................................................................................................................................12
3.3.1 Charge the Battery...............................................................................................................12
3.4 Turn On/Off ...................................................................................................................................13
3.5 Test Slots........................................................................................................................................13
3.5.1 Clips and Cables: ................................................................................................................13
4.[MEAS] Key 14
4.1 <MEAS DISPLAY>Page...............................................................................................................14
4.1.1 [TRIGGER].........................................................................................................................14
4.1.2 Resistance [RANGE]..........................................................................................................15
4.1.3 Test [SPEED] (AT528 only)................................................................................................16
4.1.4 Comparator [COMP]...........................................................................................................16
4.1.5 [BEEP] Feature...................................................................................................................16
4.1.6 Status Bar on <MEAS DISPLAY>......................................................................................17
4.1.7 Icons on <MEAS DISPLAY> .............................................................................................17
4.1.8 [VIEW DATA] Softkey.......................................................................................................17
4.1.9 [SAVE DATA] Softkey........................................................................................................17
4.2 <VIEW DATA> page.....................................................................................................................17
5.[SETUP] Key 19
5.1 < SETUP> page .............................................................................................................................19
5.2 Short-circuit Clear Zero [CLEAR ZERO]......................................................................................20
5.2.1 Comparator Mode [RESMODE][VOLTMODE].................................................................20
5.2.2 Comparator Nominal [ResNom][VoltNom].........................................................................21
5.2.3 Low Limit and High Limit [ResLow] [ResHigh][VoltLow][VoltHigh] ...............................21
6.<SYSTEM CONFIG> page 22
6.1 <SYSTEM CONFIG>page ............................................................................................................22
6.1.1 [LANGUAGE]....................................................................................................................22
6.1.2 [ACCOUNT], [PASSWORD].............................................................................................22
6.1.3 [DATE], [TIME] .................................................................................................................23
6.1.4 DIM DISPLAY ...................................................................................................................23
6.1.5 Auto Power Off [APO]........................................................................................................24
6.1.6 RS232 [BAUD] rate............................................................................................................24
6.2 <SYSTEM INFORMATION> .......................................................................................................24
6.3 <SYSTEM SERVICE> ..................................................................................................................25

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Unpacking and Preparation
7.Specification 26
7.1 General Specifications ...................................................................................................................26
7.1.1 AT528 AC Resistance Range...............................................................................................26
7.1.2 AT528 DC Voltage Range ...................................................................................................26
7.1.3 AT528LAC Resistance Range ............................................................................................27
7.1.4 AT528L DC Voltage Range.................................................................................................27
7.2 Features..........................................................................................................................................27

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AT528/528L User's Guide
1. Unpacking and Preparation
This chapter describes:
Incoming Inspection
Power Supply
Working Environment
Cleaning
Replace Battery

Adjust Support
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 Supply
AC power adapter: ATL909
Rechargeable Li battery: ATL805
Input : 90V-260VAC,49Hz~62Hz, <10VA
Warning: Do Not use any other power adapter or battery
1.3 Working Environment
Environmental Requirements:
Temperature: 0℃～55℃,
Humidity: At 23℃less than70%RH
Altitude: 0 ~ 2000m
1.4 Cleaning
Do not clean the inside of the instrument

7
Unpacking and Preparation
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 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 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.
1.6 Adjust Support
The support has two positions:
60 degrees and 45 degrees.
45 degrees, makes the instrument more stable.

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AT528/528L User's Guide
Figure 1-2 60 Degrees Supporting
Figure 1-3 45 Degrees Supporting

9
Overview
2. Overview
This chapter describes:
Introduction
Main Specifications and Features

Main Functions
2.1 Introduction
Thank you for choosing AT528/AT528L Handheld AC Ohmmeter.
AT528/AT528L handheld AC Ohmmeter adopts high-performance 32-bit ARM processor.
It is a meter with wide resistance measurement range from 0.01mΩ to 2kΩ(AT528) and
DC voltage range from 1.000V to 50.00V.
The instrument features an m-Ohm and V mode that allows simultaneous measurement and
comparison of battery internal resistance and open-circuit voltage. This Meter is highly
suitable for battery inspection lines as one unit can act as both a low-resistance meter and a
voltmeter.
The AT528/AT528L completes with comparator function and external interface utilizing
the principles of the AC 4-terminal method that gives priority to line use and offers high
speed, high accuracy and high resolution.
AT528 is also equipped with Mini-USB to RS232 interface to apply to remote control, data
acquisition and analysis.
2.2 Functional Comparison AT528 and AT528L
Model
Resistance Range
Voltage Range
Accuracy
AT528
0.01mΩ-2kΩ
0.0001~50.00V
0.1%
AT528L
0.1mΩ-200Ω
0.001~50.00V
0.5%
2.3 Main Specifications and Features
Basic Accuracy: Resistance: 0.5% Voltage: 0.1% (AT528)
Max Display: Resistance:2200 digit, Voltage: 50000 digit(AT528)
6 rangers with Auto, Manual and Nominal Modes
Four-terminal test method
Test Speed: 20 times/s (FAST mode, AT528, Range Hold Mode)
Trigger Mode: Internal, Manual and BUS trigger

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AT528/528L User's Guide
2.4 Main Functions
2.4.1 Correction
Short-circuit Clear Zero correction for all ranges.
2.4.2 Comparator (Sorting Function)
Set up sorting function to do GD/NG sorting.
Comparator Methods:
Absolute value of tolerance ±TOL sorting
Percentage tolerance %TOL sorting
Sequence comparison sorting
Beep Feature:
Beep: OFF/GD/NG
2.4.3 System Setup
1. Keypad Lock Function
2. Switch Both in Chinese and English
3. Time and Date Settings
4. Administrator Accountant Settings
5. Background Brightness Settings
6. Auto Power Off settings
2.4.4 Remote Control
Max baud rate: 115200bps,SCPI available, ASCII transmit.

11
Startup
3. Startup
This chapter describes:
Front Panel Summery
Interfaces
Power Supply
Turn on/off
Test Slots
3.1 Front Panel Summery
Table 3-1 Front panel summery
1 Beep
2
Battery
Charging
Indicator
3 Trigger
Indicator
4 Power on/off
5 Numeric Keys
6 Test Slots
7 Main Page Key
8 Direction Keys
9 Soft keys 1
10 Soft keys 2
11 TFT-LCD
Screen
3.2 Interfaces
Figure 3-1 Interfaces

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AT528/528L User's Guide
1. USB Host Port
2. Mini-USB Slave Port
3. Reserved Interfaces
4. Power Adaptor
3.3 Power Supply
Power adaptor: ATL909
The instrument can be powered by Li battery. When the battery is low, only power adaptor
can charge the battery.
Figure 3-2 Instrument and power adaptor
3.3.1 Charge the Battery
Use the power adaptor to charge the battery. The power key is orange when charging the
battery even the instrument turned off. When the battery is full, the indicator is out.
Figure 3-3 Power key is orange when charging.

13
Startup
Attention！The power key is still orange while charg
ing even when the instrument
shut down.
3.4 Turn On/Off
Press power key softly to start or turn off the instrument.
3.5 Test Slots
Insert the cable box into test slots
Figure 3-4 Test Slots
3.5.1 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.

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AT528/528L User's Guide
4. [MEAS] Key
This chapter describes:
<MEAS DISPLAY> Page
Short-Circuit Correction

<COMPARATOR>Page
4.1 <MEAS DISPLAY>Page
Press [Meas] key to enter <MEAS DISPLAY>Page.
The <MEAS DISPLAY> page includes following setup:
Trigger Mode [TRIGGER]
Measurement Range [RANGE]
Test Speed [SPEED]
Comparator [COMP] ON/OFF
[BEEP] Feature
Softkey VIEW DATA – To Enter [VIEWDATA] page
Softkey SAVE DATA – To Store Current Measurement Result into Internal
Flash Disk
Figure 4-1 <MEAS DISPLAY>Page
4.1.1 [TRIGGER]
AT528/528L includes three following settings:
Internal trigger, Manual trigger and BUS trigger.
Table 4-1 Trigger Setting
Trigger
Internal
Internal Trigger
Manual
Press [Enter] key once, the instrument runs a test cycle
BUS
Received a RS232 trigger command, the instrument runs a test cycle

15
[MEAS] Key
Procedure to set the trigger:
Step 1
Press [Meas] key to enter <MEAS DISPLAY>Page
Step 2
Use cursor keys to select [TRIGGER] field
Step 3
INT
Automatic Internal trigger
MAN
Manual trigger by pressing [Trig] key
BUS
BUS trigger by RS232 SCPI command
4.1.2 Resistance [RANGE]
AT528/528L has three range modes:
Auto range, Manual range and Nominal range
Table 4-2 Resistance Ranges
Range
Description
Pros
Cons
AUTO
Automatically
select the best range according
to impedance
Range is automatically set.
Very convenient
Test speed is
slower than
manual
ranging,
HOLD
The instrument will always
use the user-specified range
Highest speed
Set the range
previously
NOMINAL
Automatically
select the best range according
to nominal value.
Best mode for
sorting.
Only available
in sorting
mode
Table 4-3 Resistance Measurement Range of AT528
Range
Range Name
Measurement Range
5 2kΩ200Ω～2.2kΩ
4 200Ω20Ω~220Ω
3 20Ω2Ω～22Ω
2 2Ω200mΩ～2.2Ω
1 200mΩ20mΩ～220mΩ
0 20mΩ0mΩ～22mΩ
Table 4-4 Resistance Measurement Range of AT528L
Range
Range Name
Measurement Range
4 200Ω20Ω~220Ω
3 20Ω2Ω～22Ω
2 2Ω200mΩ～2.2Ω
1 200mΩ20mΩ～220mΩ
0 20mΩ0mΩ～22mΩ
Procedure of setting the range:
Step 1
Press [Meas] key to enter measurement page
Step 2
Use the cursor key to select [Range]

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AT528/528L User's Guide
Step 3
AUTO
Auto range
HOLD
Current range is hold
NOMINAL
Select the range according to resistance nominal
value [ResNom].
INCR+
Increase range
DECL-
Decline range
The DC voltage measurement range cannot be selected. Instrument always uses automatic
range mode.
4.1.3 Test [SPEED] (AT528 only)
SLOW, MED and FAST can be selected for AT528
SLOW mode will result in more stable and accurate measurement result.
(Only Slow speed mode for AT528L).
The following speed is measured in range-hold mode:
SLOW: 2 times/sec
MED: 10 times/sec
FAST: 20 times/sec
The following speed is measured in range-auto mode:
SLOW: 1.8 times/sec
MED: 6.8 times/sec
FAST: 16 times/sec
Procedure to set test speed:
Step 1
Press [Meas] key to enter measurement page;
Step 2
Use the cursor key to select [SPEED] field
Step 3
SLOW
MED
FAST
4.1.4 Comparator [COMP]
Set the comparator parameter in <SETUP> page, this page is about how to turn on/off
comparator.
Procedure to turn COMP on/off:
Step 1
Press [Setup] key to enter setup page;
Step 2
Use the cursor key to select [COMP];
Step 3
OFF
Comparator off
ON
Comparator on
4.1.5 [BEEP] Feature
Procedure to set the beep:
Step 1
Press [Meas] key to enter measurement page;
Step 2
Use the cursor key to select [BEEP]
Step 3
OFF
Turn Beep Off
GD
Beep while Pass
NG
Beep while Fail

17
[MEAS] Key
4.1.6 Sta tu s Bar on <MEAS DISPLAY>
HOLD – Hold the data, test stops.
SYSTEM– Go to <SYSTEM CONFIG>Page
KEY LOCK – Lock the keypad.
Time
4.1.7 Icons on <MEAS DISPLAY>
Table 4-5 Icons
Icon
Description
Powered by Li battery
Powered by external power supply
USB-Disk is available.
H Hold current data.
4.1.8 [VIEW DATA] Softkey
To enter the <VIEW DATA> page by pressing [VIEW DATA] softkey.
4.1.9 [SAVE DATA] Softkey
Every press this key a line of measurement result will be stored into internal flash disk.
The saved data can be reviewed on <VIEW DATA> page by pressing [VIEW DATA]
softkey.
4.2 <VIEW DATA> page
The measurement result can be stored in AT528/AT528L’s internal nonvolatile memory by
press the [SAVE DATA] softkey in <MEAS DISPLAY> page.
The format of measurement result is:
[Resistance][Voltage][Date][Time]
You can review the saved data on the <VIEW DATA> page by pressing the [VIEW DATA]
softkey in <MEAS DISPLAY> page.
Figure 4-2 <VIEWDATA> page

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AT528/528L User's Guide
SAVE TO DISK – Store all data into USB Disk
RESET – The data will be stored from the start of the table.
FORMAT – To format the internal nonvolatile memory disk, all data will be lost.
PAGE – Jump to the provided page

19
[SETUP] Key
5. [SETUP] Key
This chapter describes:
<STEUP> page
5.1 < SETUP> page
Press [Setup] key to enter <SETUP>page.
In <SETUP> page, the Instrument does not display measurement result and comparator
result, testing is not in progress.
The <SETUP> page includes following setup:
Trigger Mode [TRIGGER]
Measurement Range [RANGE]
Test Speed [SPEED]
Comparator [COMP] ON/OFF
BEEP Feature
Softkey CLEAR ZERO – Clear Zero Correction
RESMODE – AC Resistance Sorting Methods
VOLTCOMP– DC Voltage Sorting Methods
ResNom – Input Resistance Nominal Value
ResLow – Input Resistance Low Limit
ResHigh – Input Resistance High Limit
VoltNom – Input Voltage Nominal Value
VoltLow – Input Voltage Low Limit
VoltHigh – Input Voltage High Limit
Some settings can be also set up in <MEAS DISPLAY> page.
Figure 5-1 <SETUP>page

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AT528/528L User's Guide
5.2 Short-circuit Clear Zero [CLEAR ZERO]
Press [Setup] key to enter < SETUP> page, and then press [CLEAR ZERO] softkey to do
short-circle clear zero.
After correction, the value will be saved into internal flash disk.
It is necessary to do short-circle clear zero.
When replace the test fixture or test cables, please do short
–circle clear zero.
How to connect the test clips before executing short-circle clear.
Figure 5-2 Connect the test clip
WRONG! DO NOT connect it like this！
5.2.1 Comparator Mode [RESMODE][VOLTMODE]
There are several items for choosing:
ABS – Absolute Mode [ABS = Result – Nominal]
SEQ – Sequential Mode
PER – Percentage Mode [PER = (Result – Nominal) / Nominal * 100%]
Procedure to set comparator mode:
Step 1
Press [Meas] key to enter <MEAS DISPLAY> page
Step 2
Select [COMP SETUP] softkey to enter <COMP SETUP> page.
Step 3
Use cursor key to select [RESMODE]
Step 4
ABS△
Result– nominal
PER△%
(Result – nominal) / nominal × 100%
SEQ
Compare result with low and high limited values.