DayTronic 5D78 Manual de instrucciones - Página 7

Navegue en línea o descargue pdf Manual de instrucciones para Instrumentos de medida DayTronic 5D78. DayTronic 5D78 20 páginas. Panel meter, ac strain gage conditioner module

Imprimir página

PECIFICATIONS

3000PLUS

ODEL

Case: Extruded metal chassis, mountable to user's panel (see

Section 1.C); secure rear connections via screw terminals

Dimensions: See Fig. 1, below

Power Requirements: 24 VDC ± 10%; 300 mA nom.; 350 mA

max.; 8.4 W; optional AC adaptor (Model 3KPS1) available

Operating Temperature Range: 0° F to 130° F (-18° C to

55° C)

Operating Relative Humidity: 10% to 95%, noncondensing

Instrument Weight: 1 lb., 10 oz. with 5D module installed

A/D Conversion: 16-bit

Sample Rate: 10 kHz; delay of 20-25 msec for limit evaluation

of DAC output

Data Display: 6-digit red LED; count by 1, 2, or 5 resolution to

maximum count of 199990 (see Section 1.D); selectable dig-

ital filtering

Displayable Data Channels: (1) ±5 VDC Scaled Output; (2)

Auxiliary DAC Output; (3) Scaled Voltage Output; selectable

via front panel or software

Programmable Processing of Auxiliary DAC Output

(Channel 2):

Limit Logic: Three limit zones (LOW/OK/HIGH) with front-

panel annunciation and corresponding contact relay out-

puts (see below); latching or nonlatching limits;

user-adjustable hysteresis windows; selectable relay

polarity

Positive and Negative Peak Capture: Controlled by logic

input (see below); selectable "peak defeat" and "backout"

thresholds; user-adjustable leak rate

Tare Offset: User-adjustable offset applied and released via

logic input (see below)

Hold Command: Applied and released via logic input (see

below) or software command

Analog Output (Channel 3): Selectable ± 0 to 5 VDC, ± 0 to

10 VDC, or 4-20 mA, single-ended; 14-bit resolution; 47-Hz

filter; update rate of 20 msec

TTL Logic Inputs (UNLATCH, TARE, PEAK, HOLD) and Out-

put (HAVE PEAK): Nominal 0 - 5 V, where 5 V = Logic 1

Fig. 1

3000PLUS Dimensions

4.41 "

3000PLUS

WITH

("true"); ±25 V without damage; noise immunity 1 V; internal

pull-down nom. 4.7 kΩ; all inputs assume Logic 0 state in the

absence of connection

Relay Logic Outputs (LIMIT HI, LIMIT OK, LIMIT LO): Two for

each limit; selectable polarity; 8 A, 250 VAC at full resistive

load; switch lifetime at 1 A exceeds 100,000 operations

Communications: Three-wire RS232 at fixed 19,200 Baud, 8

Data Bits, 1 Stop Bit, No Parity; for setup and data transfer

Front-Panel Instrument Indication: Limit status, displayed

channel, setup stage, and overrange (flashing display)

ODEL

Input Overvoltage Protection: Up to 240 VAC rms on all Sig-

nal and Excitation lines

ESD Protection: Up to 4 kV on all connections

Isolation: 1500 VAC between input and output terminals; 1500

VAC between I/O terminals and power supply / communica-

tions terminals

Transducer Types: Conventional 4-arm strain gage bridges,

typically transformer-coupled, 120 Ω to 10 kΩ; zero range is

20% of the stated full scale. A screw terminal is provided for

user-supplied shunt calibration resistor (see Fig. 8).

Input Ranges (Full-Scale): See Table 1, below; selectable

when the 3000PLUS meter is configured (NOTE: the highest

range selection accommodates actual inputs as high as 4.8

mV/V*)

Excitation Frequency: 3.27, 5.00, or 10.00 kHz; selectable

when the 3000PLUS meter is configured

Excitation Voltage: Nominal 3 VAC rms

Accuracy: Dependent on range and excitation; see Table 1

Amplifier:

Normal-Mode Range: 15 V rms operating; 240 V rms with-

out damage

Input Impedance (Differential): Greater than 350 kΩ

Offset: Initial: ±0.05% of full scale; vs. temperature: ±25

ppm/°C; vs. time: ±10 ppm/month

* See Table 2 in Appendix B for the "practical" ranges that apply

to the 5D78 RANGE (RNG) setting.

1.70 "

5D78 I

NSTRUCTION

1. I

NTRODUCTION

5D78

7.17 "

. SB.3

ANUAL V

(cont'd)

0.22 "

3KP78 - 1.3