KYOWA CDV-900A User manual

IM-A-945 July 2013
INSTRUCTION MANUAL
CDV/CDA-900A
SIGNAL CONDITIONER
Thank you for purchasing KYOWA’s product CDV/CDA-
900A Signal Conditioner.
Read this Instruction Manual carefully in order to make full
use of the high performance capabilities of the product.
Do not use the product in methods other than described in
this Manual.
Generally, company names and trade names described in this Instruction Manual are trademarks or registered
trademarks of the companies.
This Instruction Manual may not be copied or reproduced, in whole or part, without consent of KYOWA.
Copyright © Kyowa Electronic Instruments Co., Ltd. All rights reserved.
The contents of the Instruction Manual are subjected to change without prior notice.

CONTENTS
STANDARD ACCESSORIES................................................................................................................................................................1
SAFETY PRECAUTIONS......................................................................................................................................................................1
PRIOR TO USE......................................................................................................................................................................................1
SAFETY SYMBOLS.............................................................................................................................................................................1
LIMITED LIFE PARTS AND PREVENTIVE MAINTENANCE............................................................................................4
CDV/CDA-900A REPLACEMENT BEFORE THE END OF SERVICE LIFE..................................................................4
NOTATIONS USED IN THE INSTRUCTION MANUAL..........................................................................................................5
INFORMATIONAL NOTES........................................................................................................................................................................5
1. PRODUCT OUTLINE....................................................................................................................................................................6
1-1. PRODUCT OUTLINE...........................................................................................................................................................6
1-2. SYSTEM CONFIGURATION............................................................................................................................................7
2. PARTS AND FUNCTIONS.................................................................................................................................................................8
2-1. FRONT PANEL..............................................................................................................................................................................8
2-2. REAR PANEL...............................................................................................................................................................................10
3. PREPARATION...................................................................................................................................................................................11
3-1. HOW TO SET UP INPUT/OUTPUT INSTRUMENTS..................................................................................................11
3-1-1 Input Instrument...............................................................................................................................................................................11
3-1-2 Output Instrument............................................................................................................................................................................11
3-2. CONNECTION OF POWER...................................................................................................................................................11
3-2-1 AC Power...........................................................................................................................................................................................11
3-2-2 DC Power...........................................................................................................................................................................................12
3-2-3 Grounding..........................................................................................................................................................................................12
4. BASIC OPERATIONS.......................................................................................................................................................................13
4-1. CONNECTION OF INPUT......................................................................................................................................................13
4-2. CONNECTION OF OUTPUT.................................................................................................................................................14
4-3. TURNING ON AND OFF THE POWER.............................................................................................................................15
4-3-1 Turning ON the Power...................................................................................................................................................................15
4-3-2 Turning OFF the Power.................................................................................................................................................................15
4-4. SELECTING MODE..................................................................................................................................................................16
4-5. TO SELECT THE SENSITIVITY REGISTRATION MODE.....................................................................................16
4-6. BASIC BALANCING.................................................................................................................................................................16
4-7. SETTING MEASURING PARAMETERS.........................................................................................................................17
4-7-1 Setting an Basic Internal Gain.....................................................................................................................................................17
4-7-2 Setting Low-pass Filter..................................................................................................................................................................18
4-7-3 Setting High-pass Filter.................................................................................................................................................................18
4-7-4 Zero Point Fine Adjustment.........................................................................................................................................................18
4-7-5 Sensitivity Fine Adjustment.........................................................................................................................................................19
5. FUNCTIONS.........................................................................................................................................................................................20
5-1. INPUT..............................................................................................................................................................................................20

5-2. OUTPUT.........................................................................................................................................................................................21
5-3. PREHEATING.............................................................................................................................................................................21
5-4. BRIDGE RESISTANCE CHECK..........................................................................................................................................21
5-5. BALANCING................................................................................................................................................................................22
5-5-1 Balancing Range..............................................................................................................................................................................22
5-5-2 Balancing............................................................................................................................................................................................22
5-6. MOVING ZERO POINT...........................................................................................................................................................22
5-7. INTERNAL GAIN.......................................................................................................................................................................23
5-7-1 Setting Internal Gain with the Calibration Signal................................................................................................................23
5-7-2 Setting Internal Gain with TEDS...............................................................................................................................................25
5-7-3 Setting Internal Gain with Actual Load...................................................................................................................................27
5-8. LOW-PASS FILTER...................................................................................................................................................................27
5-9. CALIBRATION SIGNAL.........................................................................................................................................................28
5-10. KEY-LOCK.................................................................................................................................................................................28
5-11. APPLICATION OF CENTRALIZED CONNECTOR.................................................................................................29
5-12. REMOTE CONTROL.............................................................................................................................................................30
5-12-1 Remote Control Signals..............................................................................................................................................................30
5-12-2 External Connection.....................................................................................................................................................................31
5-13. SETTING SWITCH.................................................................................................................................................................31
5-14. BRIDGE EXCITATION VOLTAGE..................................................................................................................................33
5-15. REMOTE SENSING................................................................................................................................................................34
5-16. USER-SPECIFIED REGISTRATION FUNCTION.....................................................................................................35
5-16-1 Items that can be Registered on the CDV-900A.................................................................................................................35
5-16-2 Items that can be Registered on the CDA-900A................................................................................................................37
6. OPTIONS................................................................................................................................................................................................39
6-1. BRIDGE BOX...............................................................................................................................................................................39
6-1-1 Functions of Bridge Box...............................................................................................................................................................39
6-1-2 Models of Bridge Box....................................................................................................................................................................39
6-1-3 Wiring to Bridge Box.....................................................................................................................................................................40
6-2. AMPLIFIER STAND FA-1B....................................................................................................................................................41
6-3. EXTENSION CABLE N............................................................................................................................................................41
6-4. NOISE FILTER F........................................................................................................................................................................41
6-5. EXCLUSIVE CARRYING CASE..........................................................................................................................................41
7. TROUBLE SHOOTING....................................................................................................................................................................43
7-1. CDV/CDA-900A CANNOT BE TURNED ON...................................................................................................................43
7-2. INITIAL BALANCING IS IMPOSSIBLE..........................................................................................................................43
7-3. NO OUTPUT IS AVAILABLE.................................................................................................................................................44
7-4. INSTABILITY OF THE ZERO POINT...............................................................................................................................44
7-5. LARGE NOISE............................................................................................................................................................................44
8. SPECIFICATIONS..............................................................................................................................................................................46
8-1. SPECIFICATIONS.....................................................................................................................................................................46
8-2. BLOCK DIAGRAM AND OPERATION PRINCIPLE..................................................................................................48
8-2-1 Block Diagram..................................................................................................................................................................................48
8-2-2 Operation Principle.........................................................................................................................................................................48
8-3. DIMENSIONAL DRAWING...................................................................................................................................................49
9. APPENDIXES.......................................................................................................................................................................................50
9-1. LOW-PASS FILTER CHARACTERISTIC.......................................................................................................................50

9-1-1 Low-pass Filter Characteristic....................................................................................................................................................50
9-1-2 Response Frequency Characteristic..........................................................................................................................................50
9-2. HOW TO CALCULATE STRAINS......................................................................................................................................51
9-2-1 Method of Calculation Applicable to Strain Gage...............................................................................................................51
9-2-2 Correction Required due to the Number of Strain Gages Used.......................................................................................52
9-2-3 When using strain gage having gage factor other than 2.00.............................................................................................55
9-2-4 Calculating Methods Applicable to Strain Gage Transducer............................................................................................56
9-2-5 Correction Required when an Extension Cable was Used................................................................................................57
9-3. TROUBLE SHOOTING...........................................................................................................................................................58
9-4. INTERNAL GAIN AND INPUT STRAIN...........................................................................................................................59
10. GLOSSARY.........................................................................................................................................................................................60

1
STANDARD ACCESSORIES
The following accessories are packed with the Signal Conditioner CDV/CDA-900A (hereinafter referred to
as the CDV/CDA-900A). When unpacking, check the contents to ensure that all accessories are enclosed.
Instruction Manual 1
Simplified instruction manual seal  1
AC power cable (P-25) 1
3p-2p conversion plug (CM-39)  1
BNC cable (U-59 and U-08)1 each
Warranty and Test Data Sheet1 each
SAFETY PRECAUTIONS
The CDV/CDA-900A is designed in accordance with "8. SPECIFICATIONS." Do not use the CDV/CDA-
900A in an environment exceeding the specifications. Or, failure of the CDV-CDA-900A may result.
PRIOR TO USE
For safe use of the CDV/CDA-900A, do not forget to read the “Safety Precautions” prior to use.
Kyowa Electronic Instruments Co., Ltd. assumes no liability for any damage resulting from the user’s failure
to comply with the safety precautions.
For safety operation of the CDV/CDA-900A, the following symbol mark is used.
GND Indicates “PROTECTIVE GROUND TERMINAL.”
Be sure to connect the GND terminal to the ground.
However, excludes when grounding with a 3-prong AC power cable.
SAFETY SYMBOLS
For safety operation of the CDV/CDA-900A, the following symbol marks are used in the Instruction Manual.
WARNING
Improper operation of the system may result in death or severe injury of
the operator.
CAUTION
Improper operation of the system may result in injury of the operator
and physical damage of the system.
Prohibited
Prohibited acts

2
WARNING
Power Supply
To prevent a fire hazard, before connecting the power cable, be sure to check the local line voltage is
matched with the operating voltage specified for the CDV/CDA-900A.
Power Cable and Power Outlet
To prevent an electric shock or fire hazard, use the accessory power cable, 3p - 2p conversion adapter,
and a power plug with protective ground terminal to the greatest possible extent.
When using 3-prong power cable, use a 3-prong power plug with protective ground terminal.
Operators must be cautioned that use of an extension power cable with no ground conductor disables the
protective ground function.
Read the Instruction Manual first, connect the power cable to the CDV/CDA-900A with the CDV/CDA-
900A turned OFF and connect the power cable to the power outlet.
Protective Ground
To prevent an electric shock hazard, be sure to ensure protective ground before connecting the power cable.
If 3p – 2p conversion adapter is used, be sure to ground the CDV/CDA-900A to the “GND” terminal.
If a 2p flat vinyl power code is used, always ground with optional grounding conductor.
For Electrical Operator Safety
To prevent an electric shock hazard, operators must be cautioned not to cut the protective grounding
conductor or disconnect the GND terminal.
External Connection
To prevent an electric shock hazard, ensure the safe protective ground of all concerned instrument and
then, connect the CDV/CDA-900A to the measuring object and external devices, PC, etc.
Avoid using in environment with inflammable gas, etc.
To prevent the risk of fire hazard or explosion, do not use the CDV/CDA-900A in environment with
inflammable gas, vapor or dust.
If any trouble occurs
To prevent a fire hazard, if smoke is emitted from the CDV/CDA-900A, immediately disconnect the AC
adapter from the receptacle and stop using the CDV/CDA-900A.
Maximum input voltage range
Do not input voltage lower than -15 V or higher than +15 V. Or, it may lower the performance and cause
troubles.

3
CAUTION
After the power OFF, wait more than 5 seconds to power ON again.
If the power switch is repeated turned ON and OFF within 5 seconds, fuse may blow out due to rush
current generated by switching the power ON and the CDV/CDA-900A reliable function may not be
guaranteed.
Do not use the CDV/CDA-900A under excessively high/low temperature.
Use the CDV/CDA-900A in the specified operating temperature range -10 to 50ºC.
Use at temperatures exceeding the specified range may lower the performance and cause trouble.
If use under direct sunlight or in a cold place is inevitable, prepare a sunscreen or take proper measures to
keep it warm.
Do not use the CDV/CDA-900A under high humidity.
Use in a humid place exceeding the specified range or where it is exposed to splashing water may lower
the performance and cause trouble.
Immediately stop the CDV/CDA-900A if operating environment changes abruptly.
Leave the CDV/CDA-900A as it is until it becomes adaptable to the environment.
Abrupt change in ambient temperature due to transportation, etc. may cause dew condensation result to
deteriorate its performance and cause trouble.
Do not use the CDV/CDA-900A under dusty environment.
This can lead to performance problems and decreased operating efficiency. Be careful that dust may not
enter the CDV/CDA-900A not only during operation but also under stored conditions.
Take care when operating the CDV/CDA-900A at a location with excessive vibration
If excessive vibration is applied to CDV/CDA-900A , performance of the CDV/CDA-900A may become
deteriorated.
Adopt vibration-proof measures such as shock absorber, etc..
Do not use the CDV/CDA-900A under poor power condition.
When using the AC power cable, operate the CDV/CDA-900A within the range of 100 to 240 VAC
(50/60 Hz). The power supply used for the CDV/CDA-900A should not experience an instantaneous
power failure and be free from noise.
When using the DC power supply, handle the CDV/CDA-900A with utmost care.
Touch the battery terminal by the input/output cable or use the same power supply with the measuring
instrument may cause unexpected trouble. Read “3-2 CONNECTION OF POWER” prior to use.
Do not pull cords and cables.
Lay cords and cables with a certain allowance so that o unreasonable force is applied to the connections.
Pulling or applying unreasonable force may cause trouble or interrupt the measurement.
Preheat the CDV/CDA-900A before use.
Preheat the CDV/CDA-900A for about 30 to 60 minutes after the power ON.
Do not use the CDV/CDA-900A in strong electromagnetic field.
Performance may be lowered and erroneous operation and troubles may result if it is used near a telemetry
system, microwave oven, electronic furnace or any other equipment generating a strong magnetic field.
Do not disassemble or remodel the CDV/CDA-900A.
Disassembling or remodeling by user may cause electric shock hazards or damage the CDV/CDA-900A.
This warranty does not cover any damaged or defective parts that results from disassembling or
remodeling.
Avoid installing sensors and CDV/CDA-900A near a welding machine.
Failure to do so will pose the risk of erroneous output, malfunction and failure.

4
LIMITED LIFE PARTS AND PREVENTIVE MAINTENANCE
The CDV/CDA-900A consists of various electronic components and those components, if not all, have a
useful life.
Using them exceeding the years specified according to each part type (useful life) may affect the
characteristics of the CDV/CDA-900A, resulting in a malfunction or a failure. You need to replace parts with
a regular preventive maintenance schedule.
Limited life parts used with the CDV/CDA-900A are as follows.
Relay
A relay's insulation will inevitably degrade or a relay itself will be damaged.
Aluminum electrolytic capacitor
The signal-noise ratio will lower due to capacity low or smoke will be emitted due to liquid leak,
resulting in a malfunction of the CDV/CDA-900A.
EEPROM
The CDV/CDA-900A will results in malfunctions or degraded performance.
To operate the CDV/CDA-900A normally, finding a sign of the CDV/CDA-900A failure early by
daily/periodic inspections and taking the corrective action are required.
For inspection, contact KYOWA or our representatives.
* All components do age and will fail.
CDV/CDA-900A REPLACEMENT BEFORE THE END OF SERVICE LIFE
Preventive maintenance and replacement parts are a cost-effective way of keeping the performance and
extending the service life of the CDV/CDA-900A.
Regardless of the replacement parts, the CDV/CDA-900A itself gradually deteriorates with age. Before the
expected service life is reached, consider replacing the CDV/CDA-900A with a new one or the latest series
as preventive maintenance.