WATANABE ELECTRIC INDUSTRY AS-203A Series Instruction Manual

DIGITAL SCALING METER
MODEL AS-203A Series
INSTRUCTION MANUAL
■Key to Warning Symbols
Warning
■Attention Symbols
The mark on the label indicates the measuring range
in the specification of item 2.
Do not disassemble or touch the interior while the
power is ON.
This may cause an electric shock.
(1) The application of voltage or current exceeding its maximum
allowable value to the input terminals may result in instrument
damage.
(2) The supply of power out of its allowable range may cause fire,
electric shock or instrument failure.
(3) The content of this manual may subject to change without prior
notice for product improvement.
(4) This manual is carefully prepared. However, if any question
arises, or any mistake, omission or suggestion is found in the
content of this manual, contact your nearest our sales agent.
(5) Keep this manual, available easily anytime.
On the AS-203A,connect the control inputs (HPLD, Decimalpoint)
to base-isolated devies when the input signal is 70V DC or more.
１.Outline
The Model AS-203A digital scaling meter is an extremely small 3
digit display scaling meter with the scaling function which enables
input signal to be displayed as its corresponding process variable.
This meter is designed to be highly reliable using custom LSI. AS
its power supply, an isolated voltage of 5V DC or 24V DC is
available.
As its instrumentation input signals, both 1 to 5V DC and 4 to 20mA
DC are available which, can be internally selected. In addition
to the avobe input signals, other input signals are also available.
2.Specifications
Prior to factory shipment, the meter is adjusted so that it
displayes about 1000 for the fullscale input.
●DC voltage measurement
Model No. Measuring
Range Code range
Offset ±1000
AS-203A-1V Fullscale
1 to 5V
100 to 1999
Accuracy:±(0.1% of rdg +2digit)(23℃±5℃ 35 to 85% RH)
●DC current measurement
Model No. Measuring
Range Code range
Offset ±1000
Fullscale
AS-203A-2A 4 to 20mA
100 to 1999
Accuracy:±(0.1% of rdg +2digit)(23℃±5℃ 35 to 85% RH)
Incorrect handling may cause
death or injury.
Attention
Caution
Max.
Input
Display allowable
impedance
input voltage
Approx
1MΩ
Max.
Input
Display allowable
resistance
input current
51Ω
WATANABE ELECTRIC INDUSTRY CO., LTD.
●DC voltage measurement
Model No.
Range code
AS-203A-11
AS-203A-12
AS-203A-13
AS-203A-14
Accuracy:±(0.1% of rdg +2digit)(23℃±5℃ 35 to 85% RH)
●DC current measurement
Model No.
Range code
AS-203A-21
AS-203A-22
AS-203A-23
AS-203A-24
AS-203A-25
Accuracy:±(0.2% of rdg +2digit)(23℃±5℃ 35 to 85% RH)
However, ±(0.3% of rdg +1digit)only for AS-203A-25
The internal resistor marked with ※is externally mounted.
●Model No. Configuration
３.Common Specifications
Measuring function
Operation method
Input circuit
Input bias current
Sampling speed
Noise rejection ratio
Temperature
characteristic
Overrange warning
Fullscale variable range
Offset variable range
Span
Display
Polarity display
External control
1/2
Decimal point
Operating temperature/
humidity range
Power supply
Power consumption
Dimensions
Weight
Dielectric strength
±250V
Insulation resistance
Accessories
Standards
±70mA
Setup enviroment
Altitude
Measuring
Display
range
±199.9mV
Offset±1000
±1.999V
Fullscale
±19.99V
100 to 1999
±199.9V
Measuring
Display
range
±199.9μA
±1.999mA
Offset±1000
±19.99mA Fullscale
100 to 1999
±199.9mA
±1.999A
EX: AS-203A-2A-4
：
Specify one Model from among Models for
DC voltage and current measurements.
：Double integral
：Single-ended type
Floating input(isolated power supply)
：2.0nA(Typical)
：2.5 times／sec.
：NMR 40 dB (TYP.),50/60Hz
：Offset displayed-value;
(TYP.)±0.1-digit/℃
(MAX.)±0.3-digit/℃
Fullscale displayed-value;
(TYP.)±0.1-digit/℃
(MAX.)±0.3-digit/℃
："1999"flashes for input signal
exceeding the maximum display.
：100 to 1999
：±1000
：2000 counts
：LED(Light emitting diode)numeric
element Character height-8mm,Red
："－"is automatically displayed When
the measurement result is negative.
：・Scaling function:
Adjusted by the fine adjuster at the
front.
・External hold:
Signal is HOLD by connecting the HOLD
terminal with the COM terminal.
・Blanking:
Signal is HOLD by connecting the
BLANK terminal with the COM
terminal.
：Can be set to any position.
(By front stud pin selection)
：0 to 50℃,35 to 85%RH
(No dew-condensing)
：5V DC ±5%,120mA max.
24V DC ±20%,30mA max.
：For 5V DC; Approx. 0.45W
For 24V DC; Approx. 0.48W
：48(W)×24(H)×73(D)mm
：Approx. 46g(mainframe only)
：Between power terminal(0V) and input
terminal(LO);For 1 min. at 500V DC
Between input terminal(LO) and
mounting panel;For 1 min. at 1500V AC
：Between each terminal described above;
More than 100MΩ at 500V DC
：Connector
Instruction manual
：IEC1010-1, EN50082-2, EN50081-2
EN IEC 63000
：Installation category Ⅱ,
pollution degree2(IEC1010-1)
：2000m max.
(3/4)
Max.
Input allowable
impedance input
voltage
100MΩ ±100V
100MΩ ±250V
10MΩ ±250V
10MΩ ±500V
Max.
Input
allowable
resistance
current
1kΩ ±10mA
100Ω ±50mA
10Ω ±150mA
1Ω ±500mA
※0.1Ω ±3A
1Pc.
1 copy