A&D AS2503 User manual

AS2503／AS2603
DC BRIDGE SYSTEM
DYNAMIC STRAIN AMPLIFIERS
INSTRUCTION MANUAL
1WMPD4003356

DC BRIDGE SYSTEM
DYNAMIC STRAIN AMPLIFIERS
AS2503／AS2603
OPERATION MANUAL
Cautions
- Read this manual carefully before using this product.
- Place this manual within reach of theAS series amplifier.

１
INTRODUCTION
▲Before Using▼
Thank you for your purchase of our product strain amplifier AS2503/AS2603. Please read this
manual carefully before operating this instrument.
This manual provides the information necessary to operate the instrument safely. This manual
covers basic functions and operations of the AS series amplifiers and handling precautions. Place
this manual within reach of the AS series amplifier. If you encounter any problem in the manual,
please contact our sales representative.
▲Examining Contents in Package▼
If opening the package in a warm room during the cold season, open the package after it has
reached room temperature to avoid any operational failure due to condensation on the surface
of the product.
The warranty does not apply for the case where damages or faults caused by use against
instructions, warnings, or cautions.
This instrument is delivered after a thorough examination at the factory prior to shipment.
However, please examine the product's condition and verify that no obvious shipping damage
has occurred after opening the package. Also, examine the specifications of the input units and
accessories. If there are any missing or damaged items, please contact our sales
representative.
▲Cautions▼
The contents of this manual are subject to change without notice.
This manual is copyrighted with all rights reserved. No parts of this manual may be
transcribed or reproduced without written permission.
Please let us know if there are any points that are unclear or missing in this manual.
We do not assume any responsibility for the outcome of the use of the AS series amplifier.

２
PRECAUTIONS
Observe the following warning and cautions when using amplifiers. The warranty does not
apply any damage caused by the use against instructions, warnings, and cautions. To
safely use the amplifiers, the following statements are used in this manual to call the
readers' attention.
This indicates a condition or practice that could result in personal injury or loss of life, and
measures and instructions to avoid such conditions.
This indicates a condition or practice that could result in damage to the instrument or other
property and general cautions that users must take into consideration.
WARNING
CAUTION

３
Power Supply
Make sure that the power supply is within the rating. If any voltage exceeding the rated voltage were
supplied, there would be risk of damage to this amplifier, or even a fire. Also, in order to prevent
electric shock and hazards such as a fire, be sure to use only the AC power cable supplied with this
amplifier.
Protective Grounding
Be sure to ground this amplifier before supplying power. Grounding is necessary to use this
amplifier safely, as well as to protect the user and peripheral equipment from injury or damage. Be
sure to observe the following instructions:
1) Protective grounding
This product uses a 3-pole power cable, which is provided with grounding. Always connect to the
power outlet having grounding.
2) Caution on protective function
While the power is supplied to the amplifier, do not cut or remove the protective grounding line.
Otherwise, safety of the amplifier is not guaranteed.
3) Protective function failure
Avoid using this product when there is a failure in protective grounding or protective functions.
Confirm that there is no failure in the protective function before using.
Use in Gaseous Atmosphere
Never use this amplifier in a flammable or explosive atmosphere, or atmosphere of steam. Use in
such atmosphere will result in danger to users and the amplifiers.
Input Signal Connection
Connect the signal wire to the input terminal after connecting protective grounding terminal to
the ground. When connecting the signal wire, check whether the signal wire is being properly
protected from leak signals from the environment or common-mode voltage in order to avoid
electrical shock or burning. Note that the AS2503 does not have isolation between the input
block and output block.
Cautions during Operation
Be careful of operations because large voltage might be applied between the input terminal (input
signal wire) and ground of this amplifier or input terminal and output terminal (output signal wire).
Installation Category and Contamination Level
The AS series amplifiers are devices with Installation Category II and Contamination Level II.
Use them following the regulations defined in Installation Category II and Contamination Level II.
WARNING

４
Caution in Handling
When using this amplifier, always follow the precautions below.
1) Users
Users who are not familiar with the operation of this instrument should avoid using it.
2) Use and storage environment
The storage temperature and humidity of this instrument is –20 to 70C and 10 to 90%,
respectively. Avoid storing in places where the temperature could rise over the storage
temperature and where there is direct sunlight exposure such as inside an automobile.
Do not use this recorder at the following locations.
１．Locations where the temperature and humidity rise due to direct sunlight or heaters.
(The operating environment of the amplifier; temperature: -10 to 50 °C, humidity: 20 to 85%)
2. Wet locations
3. Locations where salt, oil, or corrosive gases exist
4. Damp or dusty locations
5. Locations subject to strong vibrations
3) Cautions on power supply
1. Be careful of power voltage fluctuations. Avoid using the amplifier when the voltage is
likely to exceed the rated voltage.
2. If the power supply includes a lot of noise or high-voltage inductive noise, use a noise filter
or other noise protection.
4) Calibration
We recommend a periodical calibration to maintain the accuracy. More reliable measurement
are possible by calibrating the amplifier once a year (extra cost option).
CAUTION

５
CAUTION IN HANDLING
Read this manual carefully before using the amplifier.
1. Do not apply neither voltage nor current to the output terminal of this amplifier from external
source.
2. Use this amplifier with power supply voltages from 85 VAC to 132 VAC, 180 VAC to 264 VAC, or
10 VDC to 30 VDC. The AC power supply selection switch is provided inside the chassis. To switch
the AC power supply voltage, refer to Page 7-4. If the power fuse is burnt, check the cause of fuse
blow-out. To replace the fuse, always disconnect the power plug and input/output signal cable first,
and then replace the fuse in the fuse holder. For how to replace fuse, see Page 7-3. When
replacing, examine the ratings of fuse (e.g. for AC or DC).
3. The operating temperature and humidity of the amplifiers is –10 to 50C and 20 to 85%,
respectively. If opening the package in a warm room during the cold season, open the package
after it has reached room temperature to avoid any operational failure due to condensation on
the surface of the product.
Do not use this instrument at the following locations.
- High-humidity locations
- Locations with direct sunlight exposure
- In the vicinity of high-temperature heat source
- Location with vibrations
- Locations where salt, water, oil, or corrosive gases exist
4. When using many amplifier units, install fan units.
5. When a case is used to accommodate amplifiers, the case must be grounded.
6. This product uses a flash memory for saving setup values. Replacement of battery is not needed
accordingly.
7. This amplifier unit uses rotary encoders are used for knobs to control functions. However,
indication position of the knob sometimes stays at the position between scale markings. In such
case, the settings upon power-up may differ from those upon turning off the amplifier. To avoid
such event, it is recommended to allow knob indication to be at the correct scale marking position.

６
WARRANTY
We ship our products after conducting quality control, which covers from design to manufacturing. It is,
however, possible that failures may occur in the products. If the product does not operate correctly,
please make a check of the power supply, cable connections, or other conditions before returning this
product to us. For repair or calibration, contact our sales agency. Before returning, be sure to inform us
of the model, serial number, and problematic points. The following is our warranty.
LIMITED WARRANTY
1. Warranty period
Two years from our shipment.
2. Warranty limit
We will repair the defects of our product free of charge within the warranty period; however, this
warranty does not apply in the following cases.
(1)Damage or faults caused by incorrect use.
(2)Damage or faults caused by fire, earthquake, traffic accident, or other natural disasters.
(3)Damage or faults caused by a repair or modification that is carried out by someone other than
a service representative of us.
(4)Damage or faults caused by use or storage in environmental conditions that should be
avoided.
(5)Periodical calibration.
(6)Damage or faults caused during transportation.
3. Liability
We do not assume any liabilities for equipment other than us.