Digital Meter

Scaling Meter

MODEL 481D

■ Full scale Display: +200 to +1999 (optional setting)
■ Variable offset function (-1000 to +1000)
■ 3 kinds of BCD data output series

Standard Specifications

Model Designation

481D

□

①

②

③

④

⑤

⑥

①Measuring Input

Code	Measuring Range	Input Resistance	Accuracy *	Overload
02	±199.9 mV	100 MΩ	±(0.1% of rdg + 1 digit)	DC ±250 V
03	±1.999 V	100 MΩ	±(0.1% of rdg + 1 digit)	DC ±250 V
04	±19.99 V	10 MΩ	±(0.1% of rdg + 1 digit)	DC ±250 V
05	±199.9 V	10 MΩ	±(0.1% of rdg + 1 digit)	DC ±250 V
V2	0 to 5 V	1 MΩ	±(0.1% of rdg + 1 digit)	DC ±250 V
V3	0 to 10 V	1 MΩ	±(0.1% of rdg + 1 digit)	DC ±250 V
11	±19.99 µA	10 kΩ	±(0.1% of rdg + 1 digit)	DC ±2 mA
12	±199.9 µA	1 kΩ	±(0.1% of rdg + 1 digit)	DC ± 20 mA
13	±1.999 mA	100 Ω	±(0.1% of rdg + 1 digit)	DC ± 50 mA
14	±19.99 mA	10 Ω	±(0.1% of rdg + 1 digit)	DC ±150 mA
15	±199.9 mA	1 Ω	±(0.1% of rdg + 1 digit)	DC ±500 mA
16	±1.999 A	0.1 Ω	±(0.2% of rdg + 1 digit)	DC ±3 A

*Accuracy:: Defined at 23 ± 5°C, 45 to 75% RH.
Temperature coefficient:: Defined at ±200 ppm/°C (Temp. range: 0 to 50°C)

②Power Supply

Code	Power Source Voltage
3	AC 100 V (90 to 132 V)
5	AC 200 V (180 to 264 V)
9	DC 24 V ± 10%

③Data Output

Code	Specifications
Blank	For display only
BP	BCD output (TTL level positive logic)
BN	BCD output (TTL level negative logic)
DN	BCD output (Transistor sink type)

④Decimal Point

Code	Description
Blank	Front setting
1	External control

⑤Sampling Rate

Code	Description
Blank	2.5 times/s fixed.
T	2.5 to 0.2 times/s variable.

⑥Display Color

Code	Description
Blank	Red LED
G	Green LED

General Specifications

Display

0 to 1999 red or green LED (character height 14.2 mm) with zero-suppress function.

Scaling function

Full scale display +200 to +1999, Offset display -1000 to +1000.

Decimal point

Optional (front setting or external control)

Over-range display

Flashing with “0”

Hold function

Holds measurement data. (no isolation)

Resolution

1/2000

Sampling rate

2.5 times/s fixed or 2.5 to 0.2 times/s variable.

Input configuration

Single ended, floating input.

A/D conversion

Dual Slope Integration System

Noise rejection

Normal mode (NMR) More than 50 dB

Common mode (CMR) More than 110 dB

Power source line mixing noise 1000 V

BCD data output

■TTL level, Isolation Output (BP: positive logic, BN: negative logic)

Data output	Parallel BCD, Latched output TTL level (CMOS-compatible), Fo=2
External output	Over (Over: Logic 1) Polarity (＋: Logic 1) Synchronized signal (10ms “L”), Fo=2
External input	Hold (Active “L”) Data-enable (Active “H”)

■Transistor, Isolation Output (DN：sink type)

Output capacity	DC 30 V 30 mA Max
Data output	Parallel BCD, Latched output (Transistor “ON” with “1”)
External output	Over (Over: “ON”) Polarity (＋: “ON”) Synchronized signal (10ms “ON”)
External input	Hold (Active “ON”) Data-enable (Active “OFF”)

Withstand voltage

Between input terminal and external case	:	AC 1500 V for 1min.
Between power terminal and external case	:	AC 1500 V for 1min.
Between power terminal and input terminal	:	AC 1500 V for 1min.

Insulation resistance

DC 500 V, More than 100 MΩ

Power supply

AC 100 V (90 to 132 V)
AC 200 V (180 to 250 V)
DC 24 V (24 V ± 10%)

Power consumption

AC power source… 3 VA,
DC power source… 60 mA

Operating temperature

0 to 50°C

Storage temperature

-20 to 70°C

Weight

AC power source…Approx. 300 g, DC power source…Approx. 200 g