A&D AD-4430B Dokumentacja Pobierz pdf (Strona 8)

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3. Specifications

3.1. Analog to Digital Unit (Load cell Input, A/D Converter)

Input sensitivity 0.15 μV/d or greater (d = minimum division)

Input voltage range -35 mV to +35 mV (-7 to +7 mV/V)

Zero adjustment range -35 mV to +35 mV (-7 to +7 mV/V)

Load cell excitation voltage

(Load cell drive capacity)

5 VDC ±5%, 60 mA with remote sensing capability

(Maximum 4 x 350 Ω load cells)

Zero ±0.02 μV/°C Typ. ±0.1 μV/°C max

Temperature coefficient

Span ±3 ppm/°C Typ. ±15 ppm/°C max

Non-Linearity 0.005% of full scale

A/D conversion method Delta-sigma method

A/D resolution count Approximately 16,000,000 counts

Display resolution 99,999 d max. (d = minimum division)

Sampling rate 1000 times/second

3.2. Display And Keys

Display element

Measurement display 5 - digit 7-segment green LED

Status indicators 6 red LEDs

Measurement

display

Numerical display Switches between NET and GROSS

Decimal point Selectable decimal places (10

, 10

)

Overflow display All the digits turn OFF. (When the polarity is negative,

the minus sign appears at the highest-order digit.)

Status indicators

: GROSS, : NET, : HOLD, : STABLE, : ZERO,

: Preset function selected from the function list.

Key switches / , (ZERO), (TARE),

3.3. General

3.3.1. Interface

BCD Output MDR connector 36pins female type

BCD Output And I/O Output I/O Input

Output circuit Open collector transistor Input circuit DC contact input

Isolation Photo coupler Open voltage Approx. 5 V

Output current 50 mA max. OFF current 0.1 mA max.

Saturation voltage 0.5V max. @50 mA ON current 2 mA min.

Threshold voltage 2V

Chattering suppression time 10 msec.

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 55 56

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