YOKOGAWA DAQSTATION DX100 User manual

Service
Manual
Yo kogawa Electric Corporation
DAQSTATION
DX100/DX200
SM 04L01A01-01E
4th Edition

SM 04L01A01-01E 1
Important Notice To the User
This manual contains information for servicing the YOKOGAWA DAQSTATION DX100/
DX200. Check the serial number to confirm that this service manual corresponds to your
instrument. Make sure not to use the wrong manual.
Before any maintenance and servicing, read all safety precautions carefully.
Only properly trained personnel
may carry out maintenance and servicing in accordance
with and to the extent permitted by this service manual.
Do not disassemble the instrument or its parts , unless otherwise clearly permitted by this
service manual.
Do not replace any part or assembly ,unless otherwise clearly permitted by this service
manual.
Yokogawa Electric Corporation (YOKOGAWA) does not in principle supply parts other
than those listed in the customer maintenance parts list in this service manual (mainly
modules and assemblies ). Therefore if an assembly fails, the user should replace the
whole assembly and
not components within the assembly (see NOTE). If the user
attempts to repair the instrument by replacing individual components within the
assembly, YOKOGAWA assumes no responsibility for any consequences, such as
defects in instrument accuracy, functionality, or reliability, or user safety hazards.
YOKOGAWA does not offer more detailed maintenance and service information than that
contained in this service manual.
All reasonable efforts have been made to assure the accuracy of the content of this
service manual. However, there may still be errors such as clerical errors or omissions.
YOKOGAWA assumes no responsibility of any kind concerning the accuracy or contents
of this service manual, nor for the consequences of any errors.
All rights reserved. No part of this service manual may be reproduced in any form or by
any means without the express written prior permission of YOKOGAWA. The contents of
this manual are subject to change without notice.
Note
YOKOGAWA instruments have been designed in a way that the replacement of electronic parts
can be done on an assembly (module) basis by the user. YOKOGAWA instruments have also
been designed in a way that troubleshooting and replacement of any faulty assembly can be
done easily and quickly. Therefore, YOKOGAWA strongly recommends replacing the entire
assembly over replacing parts or components within the assembly. The reasons are as follows:
•The instruments use high-performance microprocessors, large scale CMOS gate arrays and
surface-mount components to provide state-of-the-art performance and functions.
•Repair of components can only be performed by specially trained and qualified maintenance
personnel with special highly-accurate tools, including costly ones.
•When taking the service life and cost of the instruments into consideration, the replacement of
assemblies offers the user the possibility to use YOKOGAWA instruments more effectively
and economically with a minimum in downtime.
•Zip is a trademark or registered trademark of Iomega Corporation in the United States
and/or other countries.
•Adobe and Acrobat are trademarks of Adobe Systems incorporated.
4th Edition : June 2010 (YK)
All Rights Reserved, Copyright ©2000, Yokogawa Electric Corporation

2SM 04L01A01-01E
Introduction
This manual contains information for servicing the YOKOGAWA DAQSTATION DX100/
DX200.
Note
This is the third edition of the manual, dated August 2007.
WARNING
This service manual is to be used by properly trained personnel only. To avoid
personal injury, do not perform any servicing unless you are qualified to do so.
Refer to the Safety Precautions prior to performing any service.
Even if servicing is carried out by qualified personnel according to this service
manual, YOKOGAWA assumes no responsibility for any result occurring from
this servicing.
Safety Precautions
The following general safety precautions must be observed during all phases of
operation, service, and repair of this instrument. Failure to comply with these
precautions or with specific WARNINGS given elsewhere in this manual violates safety
standards of design, manufacture, and intended use of the instrument.
YOKOGAWA ELECTRIC CORPORATION assumes no liability for the customer’s failure
to comply with these requirements.
General Definitions of Safety Symbols Used on Equipment and in Manuals
High temperature. To avoid injury caused by hot surfaces, the
operator must not touch the heatsink.
Danger. Affixed to the instrument, this symbol indicates danger to
personnel or the instrument and the operator must refer to the
user's manual. The symbol is also used in the corresponding place
in user's manual.
Protective grounding terminal,to protect against electrical shock.
This symbol indicates that the terminal must be connected to
ground before operation of equipment.
Functional earth terminal. This terminal should not be used as a
“Protective earth terminal.”
WARNING Describes precautions that should be observed to prevent serious
injury or death to the user.
CAUTION Describes precautions that should be observed to prevent minor or
moderate injury, or damage to the instrument.

SM 04L01A01-01E 3
WARNING
Power Supply
Ensure the source voltage matches the voltage of the power supply before
turning ON the power.
Protective Grounding
The protective earth terminal must be connected to ground to prevent an electric
shock before turning ON the power.
Necessity of Protective Grounding
Never cut off the internal or external protective earth wire or disconnect the
wiring of the protective earth terminal. Doing so poses a potential shock hazard.
Fuse
To prevent a fire, make sure to use a fuse with the specified standard (current,
voltage, type). Before replacing the fuse, turn off the power and disconnect the
power source. Do not use a different fuse or short-circuit the fuse holder.
See page 3-3 or 3-4 in chapter 3.
Defect in the Protective Earth Terminal and Fuse
Do not operate the instrument when the protective earth terminal or fuse might
be defective.
Do Not Operate New Flammable Meterials
Do not operate the instrument in the presence of flammable liquids or vapors.
Operation of any electrical instrument in such an environment constitutes a
safety hazard.
Do Not Remove Any Covers
There are some components inside the instrument containing high voltages. Do
not remove any cover if the power supply is connected. The cover should be
removed by qualified personnel only.
External Connection
To ground securely, connect the protective grounding before connecting to the
measurement or control unit. Also, before touching the circuit, turn off the power
to the circuit and check that there is no voltage being generated.

4SM 04L01A01-01E
Overview of This Manual
This manual is meant to be used by qualified personnel only. Make sure you read the
safety precautions at the beginning of this manual and the warnings and cautions
contained in any relevangt chapters prior to carrying out servicing.
This manual contains the following chapters.
1General Information
Provides an introduction and describes safety considerations.
2Performance Tests
Describes the tests for checking the performance of the instrument.
3Adjustment
Describes the adjustments which can be performed by users.
4Principles of Operation
Function block diagrams and principles of operation.
5Troubleshooting
Describes procedures for troubleshooting and how to handle the replacement of
parts.
6Schematic Diagram
Contains the system configuration diagram.
7Customer Maintenance Parts List
Contains exploded views and a list of replaceable parts.
Specifications are not included in this manual; for specifications, refer to IM
04L01A01-01E or IM 04L02A01-01E.

SM 04L01A01-01E 5
1
2
3
4
5
6
7
Contents
Important Notice To the User ...............................................................................................................1
Introduction ...........................................................................................................................................2
Safety Precautions............................................................................................................................... 2
Overview of This Manual ......................................................................................................................4
Chapter 1 Principles of Operation
1.1 Block Diagram of the DX .......................................................................................................... 1-1
1.2 Input Section ............................................................................................................................. 1-1
1.2.1 A/D Assembly ............................................................................................................... 1-1
1.2.2 Input Terminal ............................................................................................................... 1-1
1.2.3 Scanner Assembly ........................................................................................................ 1-2
1.3 Data Storage Functions ............................................................................................................ 1-2
1.4 Display Unit............................................................................................................................... 1-2
1.5 Calculation Function ................................................................................................................. 1-2
1.6 Alarm Function .......................................................................................................................... 1-2
1.7 Other Functions ........................................................................................................................ 1-2
Chapter 2 Testing
2.1 Acceptance Test ........................................................................................................................ 2-1
2.2 Self Diagnostic Test .................................................................................................................. 2-1
2.3 Performance Test ...................................................................................................................... 2-2
2.3.1 Before You Begin ..........................................................................................................2-2
2.3.2 Measurement Accuracy Test......................................................................................... 2-3
2.3.3 Reference Junction Compensation Accuracy Test ....................................................... 2-4
Chapter 3 Replacing Parts
3.1 Replaceable Parts .................................................................................................................... 3-1
3.2 When Repair is Necessary ....................................................................................................... 3-1
3.3 Recommended Replacement Periods for Worn Parts .............................................................. 3-2
3.4 Replacing the Fuse ................................................................................................................... 3-3
3.5 Replacing the Battery ............................................................................................................... 3-4
Chapter 4 Adjustments
4.1 Before You Begin ...................................................................................................................... 4-1
4.2 AD Board Offset and Gain Adjustment ..................................................................................... 4-2
4.2.1 Manual Adjustment ....................................................................................................... 4-2
4.2.2 PC Controlled Adjustment ............................................................................................ 4-5
Chapter 5 Troubleshooting
5.1 Procedure ................................................................................................................................. 5-1
5.2 Flow Chart ................................................................................................................................ 5-1
5.3 Troubleshooting Checklist ......................................................................................................... 5-2
Chapter 6 Schematic Diagram
Chapter 7 Customer Maintenance Parts List
7.1 DX100 Customer Maintenance Parts List................................................................................. 7-1
7.2 DX100 Standard Accessories ................................................................................................... 7-8
7.3 DX200 Customer Maintenance Parts List................................................................................. 7-9
7.4 DX200 Standard Accessories ................................................................................................. 7-16

SM 04L01A01-01E 1-1
1
PRINCIPLE OF OPERATION
1.1 Block diagram of the DX/1.2 Input section
Chapter 1 Principles of Operation
This chapter describes the principles of operation for the DX100 and DX200.
1.1 Block Diagram of the DX
Data storage functions
Input section
Calculation function
Alarm function
Communication function
(optional)
Input terminal
Scanner assembly
A/D assembly
CPU
External storage
Internal memory
Display unit
Remote function
Relay contact (optional)
Transmitter power supply (optional)
Figure 1 Block diagram
For datails see schematic diagram page 6-1 and 6-2.
1.2 Input Section
1.2.1 A/D Assembly
The A/D assembly has items such as a programmable gain amp, voltage reference,
PWM modulator, current source for RTD measurements, differential amp, voltage source
for RJC, serial parallel converter, control logic, and an occurred scanner SSR control
signal.
The A/D assembly uses a sinewave oscillating type self-resonant switching power supply
(DC/DC converter), and noise filtering is achieved by signal integration.
The A/D assembly detects the frequency of the power while it is ON and the integrated
time becomes 20 ms or 16.67 ms. Therefore it carries a very high rate of noise rejection
for the power frequency (in auto mode).
In case the power frequency of the instrument and of the measured object are different,
the appropriate integrated time is manually selectable. In case of the DX106, DX112,
DX210, DX220, or DX230, the selection of 100 ms for 50/60 Hz is also available. A 16 bit
resolution is achieved regardless of the integrated time.
1.2.2 Input Terminal
The input terminal is removable. The internal printboard is isothermal because a print
board with a metal core is being used. Therefore, stable reference junction
compensation is realized.

SM 04L01A01-01E
1-2
1.2.3 Scanner Assembly
An in-house SSR (solid state relay) is being used for the scanner. The SSR, having a
semiconductor switch, has a withstand voltage as high as 1500 V and a leakage current
of only 1 nA. For that reason, it has the following features.
1) Semi-infinite life due to the absence of mechanical contacts
2) Silent operation
3) No occurrence of thermoelectric power.
On the other hand, compared to a mechanical relay, the SSR has, the disadvantage of a
bigger ON resistance and OFF capacity. As a result, RTD measurement and noise
resistance characteristics are affected. Regarding RTD measurements, a differential
amp was inserted into the previously mentioned analog circuit without increasing the
number of parts, so that it would receive no influence from ON resistance.
For RTD measurements there is generally no insulation between channels.
1.3 Data Storage Functions
For storing data, the DX has 1.2 MB of internal memory and is equipped with a 3.5-inch
floppy disk drive (1.44 MB 2HD), a Zip drive, or an ATA flash memory card drive. The
measured data can also be saved to external storage media such as floppy disks, Zip
disks, and ATA flash memory cards.
1.4 Display Unit
The DX has a 5.5-inch (DX100) or 10.4-inch (DX200) TFT color LCD on which it displays
the measured results (240 (vertical) ×320 (horizontal) pixels for the DX100 or 480
(vertical) ×640 (horizontal) pixels for the DX200).
1.5 Calculation Function
The DX performs differential computation, linear scaling, and square roots using a
microprocessor on the CPU board.
1.6 Alarm Function
The following six alarm types can be set.
High limit (H), low limit (L), differential high limit (h), differential low limit (l), rate-of-
change on increase (R), rate-of-change on decrease (r), alarm delay upper limit alarm
(T), or alarm delay lower limit alarm (t).
1.7 Other Functions
1Communication function:
Ethernet (standard)
RS-232/RS-422A/FOUNDATION Field bus interface added (optional).
2Remote function:
The trigger, start/stop, time adjustment, and other functions can be controlled
remotely (optional).
3Relay contact:
Alarm output and memory end/fail output (optional).
4Transmitter power supply:
DC24 V output for transmitter (optional).
1.2 Input Section/1.3 Data Storage Functions/1.4 Display Unit/1.5 Calculation Function/1.6 Alarm Function/1.7 Other Functions

2-1
SM 04L01A01-01E
2
PERFORMANCE TEST
2.1 Acceptance Test/2.2 Self Dignostic Test
Chapter 2 Testing
This chapter describes the following tests.
2.1 Acceptance test
2.2 Self Diagnostic test
2.3 Performance test
2.1 Acceptance Test
This section describes the procedure to perform the acceptance test.
1Read the preface, to the user’s manual, “Checking the Package Contents” and verify
that you have all of the contents.
2Make sure to understand the operating procedures as described in the user’s
manual.
3Check each function using the user’s manual.
4Read and implement section 2.2, “Self Diagnostic Test.”
5Read and implement section 2.3, “Performance Test.”
2.2 Self Diagnostic Test
The DX is provided with complete self diagnostic functions to enhance reliability in
measurement and serviceability.
When you turn ON the power, the DX will automatically execute the following types of
diagnoses alternately and display the results. After these tests are completed, the DX is
ready for use.
1Main ROM sum test
2Main RAM write/read test
3A/D and A/D ROM sum test
4Acquisition memory test
Table 2 shows the order and results of the self diagnostic tests.
Code Message
901 ROM failure.
902 RAM failure.
910 A/D memory failure for all input channels.
911 Channel 1 A/D memory failure.
912 Channel 2 A/D memory failure.
913 Channel 3 A/D memory failure.
914 Channel 4 A/D memory failure.
921 Channel 1 A/D calibration value error.
922 Channel 2 A/D calibration value error.
923 Channel 3 A/D calibration value error.
924 Channel 4 A/D calibration value error.
930 Memory acquisition failure.
940 The Ethernet module is down.

2-2 SM 04L01A01-01E
2.3 Performance Test
2.3 Performance Test
This paragraph describes several tests to verify the operation of the DX’s performance
against published specifications.
2.3.1 Before You Begin
2.3.2 Measurement Accuracy Test
2.3.3 Reference Junction Compensation Accuracy Test
The performance tests need not be performed in any specific order.
2.3.1 Before You Begin
Testing Conditions
When carrying out the performance tests described in the following pages, make sure
the instrument is tested under the following conditions:
Ambient temperature: 23±2°C
Humidity: 55±10%RH
Power supply voltage: 90 to 132 VAC, 180 to 250 VAC
Power supply frequency: 50/60 Hz±1%
Preparation
Perform the following steps before carrying out the performance tests described in the
following pages.
1Turn ON the power supply and verify that the DX passes the self diagnostic test
without any problems.
2Allow a warm up time of at least 30 minutes for required instruments and the unit
under test.
Instrument
DC Voltage Generator
Decade Resistance Box
Thermostatic Chamber
Thermocouple
Instruments Required for Tests
Required Specifications
Accuracy: ±50ppm
Accuracy: ±10ppm
±0.01°C
Calibrated
Recommended
FLUKE 5520A
YOKOGAWA 279301

2-3
SM 04L01A01-01E
2
PERFORMANCE TEST
2.3.2 Measurement Accuracy Test
Connection
LN
DC voltage standard
Input terminals
(DC volt and TC inputs)
+
-
+
–
CH1
Decade resistance box
(Model 2793-01 from
Yokogawa Meters &
Instruments Corporation)
The resistance of three lead wires
must be equal.
+/A
-/B
/b
LN
Input terminals
(RTD inputs)
CH1
Figure 2.1 Connection diagram
Procedure
1Connect the equipment as shown in Figure 2.1
2Carry out the preparations as described in 2.3.1
3Apply input voltage/resistance to the DX and verify that the measured value lies
within the tolerance for each range according to the table below.
20 mV
60 mV
200 mV
2 V
6 V
20 V
50 V
Table of tolerance
-20 mV
0 mV
+20 mV
-60 mV
0 mV
+60 mV
-200 mV
0 mV
+200 mV
-2 V
-1 V
0 V
+1 V
+2 V
-6 V
0 V
+6 V
-20 V
0 V
+20 V
-30 V
0 V
+30 V
Input VoltageRange
-20.04 to -19.96
-0.02 to +0.02
+19.96 to +20.04
-60.08 to -59.92
-0.02 to +0.02
+59.92 to +60.08
-200.4 to -199.6
-0.2 to +0.2
+199.6 to +200.4
-2.004 to -1.996
-1.003 to -0.997
-0.002 to +0.002
+0.997 to +1.003
+1.996 to +2.004
-6.008 to -5.992
-0.002 to +0.002
+5.992 to +6.008
-20.04 to -19.96
-0.02 to +0.02
+19.96 to +20.04
-30.06 to -29.94
-0.03 to +0.03
+29.94 to +30.06
Tolerance Specification
±(0.1% of reading + 2 digits)
±(0.1% of reading + 3 digits)
2.3 Performance Test

2-4 SM 04L01A01-01E
2.3 Performance Test
Temperature
Range
Pt100
18.52 Ω
l00.00 Ω
313.71 Ω
Input Resistance Specification
±(0.15% of reading+0.3°C)
Tolerance
-200°C
0°C
600°C
-200.6 to -199.4
-0.3 to +0.3
+598.8 to +601.2
For /N1 model
Temperature
Range
Pt100
18.52 Ω
l00.00 Ω
313.71 Ω
Input Resistance Specification
±(0.3% of reading+0.6°C)
Tolerance
-200°C
0°C
600°C
-201.2 to -198.8
-0.6 to +0.6
+597.6 to +602.4
Cu10
(GE)
-200°C
0°C
300°C
-200°C
0°C
300°C
1.326 Ω
9.036 Ω
20.601 Ω
3.750 Ω
25.000 Ω
56.875 Ω
Cu25
-201.8 to -198.2
-1.0 to +1.0
+297.8 to +302.2
±(0.4% of reading+1.0°C)
±(0.3% of reading+0.8°C)
-201.4 to -198.6
-0.8 to +0.8
+298.3 to +301.7
Note
The error of a connected apparatus is not included in the tolerance.
2.3.3 Reference Junction Compensation Accuracy Test
Connection
Calibrated thermocouple wires
LN
Input terminals
Power supply terminals
+
-
+
–
Thermostatic chamber (0°C)
Figure 2.2 Connection diagram
Procedure
1Connect the instruments as shown in figure 2.2.
2Carry out the preparations as described in 2.3.1.
3Carry out stable ambience and secure the terminal cover to avoid the influence of
wind.
4Set the input range for the desired thermocouple, and set the span to ±50°C.
5Verify that the measured value lies within the tolerance.
Temperature
0°C
Thermocouple
K,T
Tolerance
Tolerance
±0.5°C *
*Detremining the actual temperature measured accuracy consists of adding the RJC
compensation accuracy and temperature range accuracy. In other words, the actual
measured value which lying within the tolerance consists of adding this value and
0˚C measured accuracy (T and K range).
Test should be done under stable ambience with the terminal cover secured to avoid
the influence of wind.

SM 04L01A01-01E 3-1
3
REPLACING PARTS
3.1 Replaceable Parts/3.2 When Repair is Necessary
Chapter 3 Replacing Parts
This chapter describes what to do when parts need to be replaced, either for preventive
maintenance or because of failure.
3.1 Replaceable Parts
3.2 When Repair is Necessary
3.3 Recommended Replacement Periods for Worn Parts
3.4 Replacing the Fuse
3.5 Replacing the Battery
3.1 Replaceable Parts
When replacement of parts is necessary, we strongly recommend replacement with an
assembly unit. YOKOGAWA instruments have been designed in a way that the
replacement of parts can be done on an assembly (module) basis by the user.
Parts supplied by YOKOGAWA are listed in the Customer Maintenance Parts List
(CMPL), in chapter 7. Smaller parts than listed in the CMPL are not supplied. The CMPL
comprises the following:
•The item number,
•The YOKOGAWA part number,
•The item quantity,
•Adescription.
3.2 When Repair is Necessary
When repair is necessary, clearly state the information listed below and forward it to the
nearest sales representative or service center. Addresses may found on the back cover
of this manual.
•Your address.
•Name and telephone number of the person in charge.
•Model code and suffix code of the instruments, which can be found on the name plate.
The name plate is found on the right inside of the recorder.
•Detailed explanation of the problem, including measures taken and displayed
messages.

SM 04L01A01-01E
3-2
3.3 Recommended Replacement Periods for Worn Parts
3.3 Recommended Replacement Periods for Worn Parts
To maintain the reliability of this recorder and in order for this recorder to deliver
outstanding performance for a long time, periodic replacement of worn parts is
recommended. The replacement parts may change to accommodate preventive
maintenance over extended time. Be sure to check with your nearest YOKOGAWA dealer.
The recommended replacement periods for worn parts are shown in the following table.
The periods shown in this table assume that the recorder is operating under standard
operating conditions. Please consider the actual operating conditions when determining
the replacement provids for your recorder.
The replacement of the worn parts except the fuse must be conducted by qualified
YOKOGAWA personnel. When required, contact your nearest Sales & Service Office; the
addresses may be found on the back of this manual.
DX100
Item Replacement Part Name Part Number Specifications Quantity Used
Fuse 2 years FUSE A1347EF 250 V, 1 A, time lag 1
(except for /P1 model)
Fuse 2 years FUSE A1352EF 250 V, 4 A, time lag 1
(for /P1 model)
LCD 5 years Back light module 1
Battery 10 years Lithium battery 1
Rubber 5 years Dust and water proof for front panel 1 each
strip rubber strip for front cover
Floppy 5 years – – 1
disk drive
Zip 5 years – – 1
disk drive
PWB 5 years Power Assy* 1
assembly 5 years Sub Power Assy* 1
5 years AD Assy* Up to models
*Replacement Period at the Upper Limit of the Normal Operating Temperature (50°C)
The replacement period varies depending on the temperature in which the instrument is operated, and the instrument’s
specifications. If the instrument is used in a 30°C environment, it may be operational for 10 years or more.
DX200
Item Replacement Part Name Part Number Specifications Quantity Used
Fuse 2 years FUSE A1423EF 250 V, 1.25 A, time lag1
(except for /P1 model)
Fuse 2 years FUSE A1463EF 250 V, 6.3 A, time lag 1
(for /P1 model)
LCD 5 years Back light module 1
Battery 10 years Lithium battery 1
Rubber 5 years Dust and water proof for front panel 1 each
strip rubber strip for front cover
Floppy 5 years – – 1
disk drive
Zip 5 years – – 1
disk drive
PWB 5 years Power Assy* 1
assembly 5 years Sub Power Assy* 1
5 years AD Assy* Up to models
*Replacement Period at the Upper Limit of the Normal Operating Temperature (50°C)
The replacement period varies depending on the temperature in which the instrument is operated, and the instrument’s
specifications. If the instrument is used in a 30°C environment, it may be operational for 10 years or more.
Note
•The LCD replacement period indicates the half life of the brightness when the brightness is set
to the factory default setting. The half life is shortened as the brightness is set higher. The
deterioration of brightness varies depending on the condition of use, and its determination is
subjective. Consider these facts for determining the actual replacement period.
•The color of the LCD may become yellowish as time elapses. The discoloration tends to
progress faster as the brightness is set higher.

SM 04L01A01-01E 3-3
3
REPLACING PARTS
3.4 Replacing the Fuse
Replace the fuse at least once every two years for preventive maintenance.
DX100
WARNING
•For safety reasons, make sure to turn OFF the power switch and disconnect the
recorder from the main power supply before replacing the fuse.
•To prevent the possibility of fire, use only the specified fuse purchased from
YOKOGAWA.
•Never short circuit the fuse holder to bypass the use of a fuse.
•To avoid the possibility of electric shock, open the front panel only when
replacing the fuse.
•Do not touch the rear side of the front panel when replacing the fuse, because it
can become hot.
•Make sure not to damage the cable while replacing the fuse.
Follow the procedures below to replace the fuse.
1. Turn OFF the power switch.
2. Disconnect the recorder from the main power supply.
3. Open the cover and remove the two screws.
4. Pull the front panel slightly toward you and lift it.
5. While pushing in the fuse carrier located to the right of the power switch, turn it
counter-clockwise approximately 45 degrees. The carrier and the fuse will slide
out.
6. Replace with a new fuse, insert the carrier in the fuse holder, and turn it
clockwise while pushing in the carrier to fix it in place.
7. Lift the front panel slightly, and attach it to the top and then the bottom of the
rubber packing. Secure the front panel with screws.
Figure 3.1 Fuse illustration (DX100)
Note
For recorders which are mounted vertically side-by-side, the front panels will interferes with
those of the instrument above it such that they cannot be opened. Therefore you must first
open the top front panel and then the ones directly below it, one by one. For the same
reason, when closing front panels, first close the bottom front panel and then the ones above
it.
3.4 Replacing the Fuse

SM 04L01A01-01E
3-4
DX200
WARNING
•For safety reasons, make sure to turn OFF the power switch and disconnect the
recorder from the main power supply before replacing the fuse.
•To prevent the possibility of fire, use only the specified fuse purchased from
YOKOGAWA.
•Never short circuit the fuse holder to bypass the use of a fuse.
Follow the procedures below to replace the fuse.
1. Turn OFF the power switch.
2. Disconnect the recorder from the main power supply.
3. While pushing in the fuse carrier located to the right of the power switch, turn it
counter-clockwise approximately 45 degrees. The carrier and the fuse will slide out.
Figure 3.2 Fuse illustration (DX200)
4. Replace with a new fuse, insert the carrier to the fuse holder, and turn it clockwise
while pushing in the carrier to fix it in place.
3.5 Replacing the Battery
This battery will last for ten years under normal operating conditions. For replacement,
please contact your nearest sales and service office; addresses may be found on the
back cover of this manual.
To avoid injury, do not replace the lithium battery yourself or disassemble this recorder to
attempt the replacement.
3.4 Replacing the Fuse/3.5 Replacing the Battery

SM 04L01A01-01E 4-1
4
ADJUSTMENTS
4.1 Before You Begin
Chapter 4 Adjustments
This chapter describes how to adjust the DAQSTATION DX100/DX200.
Adjustment is required when the performance test results in an excessive tolerance
error, or after replacing the AD board assembly. In addition, adjustments are
recommended once a year to maintain high accuracy.
This chapter consists of the following sections.
4.1 Before You Begin
4.2 AD Board Offset and Gain Adjustment
4.1 Before You Begin
Adjustment Conditions
When carrying out the adjustments described below, make sure the recorder’s
environment meets the following conditions.
Ambient temperature: 23 ±5°C
Humidity: 35 to 75% RH
Power supply voltage: rated voltage ±(rated voltage x 5%)
Preparation
Perform the following steps before carrying out the adjustments.
1Turn on the power supply and verify that the unit under adjustment passes the self-
diagnostic tests without any problems.
2Allow a warm-up time of at least 30 minutes for the required instruments and the unit
under adjustment.
Required Instruments
Instrument Required Specifications Recommended
DC voltage standard Accuracy: ±50ppm of setting FLUKE
Resolution: 10 µV5520A
Decade resistance box Accuracy: ±0.01% YOKOGAWA
2793
Personal computer With ETHERNET or RS-232
or RS-422A/485 interface
(depends on your system)

SM 04L01A01-01E
4-2
4.2 AD Board Offset and Gain Adjustment
4.2 AD Board Offset and Gain Adjustment
An EEPROM for saving calibrated values is located on every AD board, so you must
perform adjustments on each board.
4.2.1 Manual Adjustment
Connection
UUA
When DC range
DC Voltage
standard
DC Voltage
standard
DECADE
RESISTANCE
BOX
DECADE
RESISTANCE
BOX
GROUP 1
CH2 CH1
+
-
A
H
L
H
L
b
B
A
b
B
+
-
UUA
When RTD or Cu range
GROUP 1
CH2 CH1
Figure 4.1 Connection diagram.
The AD board may be shared by a number of channels. Connect the object channels to
the AD board you want to adjust using the table below as a reference.
Zero
CH1
CH1
CH1
CH1
CH1
CH1
CH1
CH1
CH1
Model
DX102
DX104
DX106
DX112
DX204
DX208
DX210
DX220
DX230
FS
CH2
CH2
CH2
CH2
CH2
CH2
CH2
CH2
CH2
Zero
-
CH3
-
-
CH3
CH3
-
CH11
CH11
FS
-
CH4
-
-
CH4
CH4
-
CH12
CH12
Zero
-
-
-
-
-
CH5
-
-
CH21
FS
-
-
-
-
-
CH6
-
-
CH22
Zero
-
-
-
-
-
CH7
-
-
-
FS
-
-
-
-
-
CH8
-
-
-
A/D No. 1 A/D No. 2 A/D No. 3 A/D No. 4
Procedure
1Connect the equipment according to figure 4.1.
2Turn on the power while pushing the ↑key and DISP/ENTER key on the UUA (unit
under adjustment) to activate the adjustment mode. The Calibration Mode screen will
appear in the display.
Select the A/D number that you wish to adjust and press ENTER.
Figure 4.2 A/D No. selecting screen.

SM 04L01A01-01E 4-3
4
ADJUSTMENTS
4.2 AD Board Offset and Gain Adjustment
3After step 2, the screen in figure 4.3 will appear.
Select item #2 for Cal/Exec.
Figure 4.3 Task item select on screen.
4The screen in figure 4.4 appears.
Select the adjusting range then press ENTER.
DX100 DX200
Figure 4.4 Range select on screen.
5Apply DC voltage or resistance to the input of the selected A/D number on the DX
using a voltage standard or decade resistance box.
6The value is adopted by pressing the ENTER key when the calibration value
stabilizes.
7Repeat steps 4 to 6 for all ranges according to table below.
Range Input at zero point Input at FS point
20 mV 0 mV 20 mV
60 mV 0 mV 60 mV
200 mV 0 mV 200 mV
1 V 0 V 1 V
2 V 0 V 2 V
6 V 0 V 6 V
20 V 0 V 20 V
Pt100 100 Ω300 Ω
Pt100* 10 Ω300 Ω
Cu10* 10 Ω50 Ω
Cu25* 10 Ω50 Ω
*: When option /N1 is installed

SM 04L01A01-01E
4-4
4.2 AD Board Offset and Gain Adjustment
8If all ranges are set, push the ESC key. The screen returns to figure 4.3.
Select item #3 to end the task.
9The dialog box in figure 4.5 appears.
Select Yes to save the calibrated value to the EEPROM. The screen will return to
figure 4.2.
Figure 4.5 calibration value saving screen.
10 Repeat steps 3 to 9 for all A/D number’s.
11 If adjustment was successful turn the power to the UUA off.
When you select task #1,
Display in figure 4.3, the screen below (figure 4.6) will appears.
Confirm the calibration value of each range (decimal value = 215: shows converted 15
bits data.)
Figure 4.6 Calibration value confirmation screen.
1When confirmation is finished, press ESC to return to the screen in figure 4.3.
Select item #3 to end the task.
2After step 1, the dialog box in figure 4.5 will appear.
Select No for normal operation.
CAUTION
Do not change the displayed value, as it influences the measured value.