Campbell CR500 Especificaciones descargar pdf (Pagina 5)

CR500 Speciflaolions

Electrical specifications

are valid

PROGRAM EXECTITION

RATE

System lasks

initiated in sync

with feal-tim€ up to

Fl&

orle

m€asuremont'wih

data'trsnsler

pd;sible

at lhis ralo withoul

in|erruplhn.

ANALOG INPIIS

NUMBER OF CHANNELS:2

difl€tential or up

to 4

single-ended. Each dltferenlial

channel can b€

contigured

as two singl+€nded

channols.

RANGE

AND RESOLUTION:

Ranges are

software

selectable

tor any chann€|.

The

resotution lor

diflerential measurements

is better lhan

singleended

moasuromenls

because two

m€aSuroments arg av€rag€d

tog€lher.

Fuil

Scale

Ra€,olutic,,

(yv)

lnpd

Range

(mW Dltlerentia! Single-Eded

*2500

3(l3

666

t250

33.3

,25

3.33

1.00

0.33

66.6

6.66

2.OO

0.66

17.5

12.5

ACCURACY OF

VOLTAGE

MEASUREMENTS

AND

ANALOG OUTPUT

VOLTAGES:

t0.1% ol FSR;

* 0.05%

of FSR,

/O'C);

(e.9.,

to.l%

FSR

'*5.0

mV for r25O0

tange)

INFUT SAMPLE

RATES:

The

fast and dow

A/D

convers'rons uee

signal

htegralion

times of 0.25

and 2,72

tt18, respeclivelY.

Fast differentlal

voltage:

4.2 rni

Slow dilferentialvoltagel

9.2

Difterential

with

toi€clion: 25.9

INPUT NOISE

VOLTAGE

(fot

r2.5

mV lang€):

Fasl differential:

0.82

RMS

SlorY diffoFntial:

0.25

RMS

Difierenlial

with

60 Hz reiection:

0.1 I

RMS

COMMON

MOOE

RANGE:

t2.5

OC COMMON

MODE

REJECTION:

140 dB'

NORMAL

MODE REJECTION:

70 dB

(60

Hz wilh

slow

ditf erential

msasurgment).

INPUT CURRENT:

tg nA

maximum.

INPUT

RESISTANCE:

20 Gohms

lypical.

EXCIIAT|ON

TPtlS

DESCRIPTION:

2 switched

excilations,

actve

during

measurement,

with

one

output

active at

a time'

Non-

active

outputs are

high impdance.

RANGE: i2.5

RESOLUTION:

0.67

ACCURACY:

t2.5 mV

(0'to

lo'C);

G25"

+50'C)

OUTPUT

CURRENT:

t25

FREQUENCY SWEEP

FUNCTION:

A swepl

fre-

quency,

square

wave

output

b€trwen 0

and 2.5

volt8 is

provid€d

lor

vibrating

wire

transduceE'

Timing

and lrequerEy

range

ate specified

by lhe

instruction.

RESISIANCE

AND CONDUCTIVITY

MEASUREMENIS

MEASUREMENT

WPES:

Using

eith€r of the

switcied

excitation

channela,

the CR500 can

rneasuro

rosiatanc€ and

conduclivily

means

ratiometdc btidg€

moasuremenls.

Standard

bridgo measurement8

include swire

and

4-wire

full btidge,

+wire, }wirc,

and 2'wir6

haf b.idge'

where appropriat€, dual

poladty

btidg€

moasure'

m6nts are used lo

elimihato

OC onor8.

resistance

ti€asurcm6nts

use a

dual

polality

over a

-25o

+50oC

range unless

otherwise

sPecified.

0.75

ms excitation

pube

lor ionic

depoladzation;

signal

integralion occurs o/er ths

lagl

0.25

m8.

ACCURACY:

10.02% ol lull

scaleinpul

range used,

limitod

by tho matching bridgt€

r6istors

(6.9.,

t0.02%

a250 mV tulFecale

hput rango

r'l 0O

trV).

The sxcitatiof,

rroltage

8hordd be

programmed

so th€ bddge ouiput

matches

the

full scale

hpul voltagp.angs.

PERIOD

AVERAGING

MEASUREME}IS

DEFINITION:

Th€ tim€

period

for

a sp€cilied

numbet

cycles of

an input signal lE

rnea8urcd,

then

divid€d

by the

number ot c}ll€slo obtain the

averag€

p€dod

ct a

slngle clEle. lmpro\red

tming

resolution and

nois€ rsduction can be

obtainod

by averaging o/er

marry c)rcl€8.

INPUTS:

Any of the

singas-iitded

analog

input

chann€|s

can be s€l€cled

tor

pedod

averaging.

Signal

afiplitud€

rcd|.Iction or

coupling

notmally

roquircd.

INPUT

FREQUENCY

RANGE:

Renga

Minwtts(peak+eak)

Max. lnpd

Co&

O Max,

Frcq.' fteqtencY

I 2mV

SkHz

2 smv

20kHz

12mV

4 2000mV

40 kHz

150 kHz

'AC

voltag€

must be c€ntered around CRsoo

ground.

RESOLUTION:

ns divided by the

numb€r ol

cydes

mea6ured.

ACCURACY:

10.01% of

reading +

RESOLUTION.

TIME REQUIRED

FOR MEASUREMENT: Signal

p€dod

multiplied by lhe

numb€r ol clcles

measured

plu8

1.5

qrcles.

PUISE

COUNIERS

NUMBER

PULSE COUNTER CHANNELS:2

eight-bit

sitteen-bit:

sollware

seleclable

switch

dosure,

high frequency

pulse,

lo*level

AC.

An additional

channel

(czP3)

can be

sofiware

contigured to

read swilch dosurG

rat68

up to

40 Hz.

MAXIMUM

COUiIT

RATE:

t6 kHz, eight-Ul counlec

250

kHz, sixleen-Ul counter.

Channela

are

scanned

I or

E4 Hz

(softwate

solectau€).

MODES:

Swibh clcur€,

high frequency

pulso,

and

low

l€vol

AC.

SWITCH

CLOSURE

MOOE

Minimum

Swit€h Clooed

Tim6:5 m8.

Minimum

Switdr Op€n

Tim€:6

rE.

Modmum

Sounce

Time: I ms open

without b€ing counted.

HIGH

FREQUENCY

PULSE MOOE

Minirnum

Pulso Widlh: I

u8.

Maximum

Input F equency:500

kHz,

voltag€

Thresholds: Counl

upon transition

fto.n

b€low

1.5 V lo abo\re 35

Maximrm

Inpd Volag€: l20

LOW

LEV€LAC

MODE

(Typicalol magnetic

pulse.tlow

lranEducers

other

low voltage,

sine wave oulpuls.)

Inpul

Htstereds: I

mV.

Maimum

AC Input Voltag€:

20 V RMS.

Mininun

AC lnpn Voltago

Range

(Hz)

(sine

wave mV

BMS)'

1000

200

1000

0.5 to

10,000

0.3lo 20.000

'l6.tfi

config.

or A4

8ca4

]9q'dlor

treq . > ?o48 Hz.

DIOIIAL

I/O PORTS

ports:

Porl Cl is sollware

seloclable

a8 a binary

inpitt

control oulpuf. Port

C?JHI b

inpul only and

can be software configurod

as en SDI-12

pon,

a Una-

input,

ot a8

switch

closute

counter

(40

Hz max).

OUTPUT

VOLTAGES

(no

load):

high 5.0

v +0.1 v;

low < 0.1 V.

OUTPUT

RESISTANCE:

5OO

OhNS.

INPUT STATE: high 3.0

5.5

V; ldt, {.5

to 0.8

INPUT RESISTANCE:

100 kohm8.

SDI.I 2 INIERFACE STANDARD

This communlcatlon

protocol,

d€\relop€d

tor micro-

paoc€$or-based

hydrologb

and environmental

9€n-

sors, i8 s*endad

the CR50O;

SENSOR CONNECTIONS:

Digital UO

Port Cl or C2

(tor

asyncfi

ronous cornnxJnication),

12V

pow€r,

and

ground.

Up to ton

SDI-I

2 senao|B can

conn€cted to each

CR5O0

digital

port.

EMlond ESD PROTECilON

Emigsions: Me€t6 of e)(coede

lhe lollowing slan-

dafth.

Radiated;

per

55022:1987

class

Conducted:

p€r

EN 55022:1

987

Ctass B

lmmunity: MeetB or e)(ceeds

lh€

follorving standaKb.

ESD:

p€r

IEC 801-2;1984

8kV ah discharge

RF:

per

IEC

801-3:19&4

3V/m,

27'500

MHz

EFT:

p€r

IEC 801-4;

1988

lkv

mains,SooV

olher

CPU AND

INTERFACE

PROCESSOR:

Hitacii 63ff|.

MEMORY:

128 K Flash and

32 K SRAM standard.

DISPI-AY: 8 diglt LCD

(0.5'

digrts).

PERIPHERAL

INTERFACE:9

D.type connoclor

for k€yboard disday,

storage

module,

mod€m,

print€r,

card olorage

modul€,

and RS-232

adapter. Baud

rales s€l€clable

at 300,

1200,9600

and

76,800. ASCII communicalim

Plotocol

is on€

Btart bit, one

stop bit, eight

data

bils

(no

padly).

CLOCK

ACCURACY: il minutc

pet

monh.

SYSTEM

POWER

REQUIREMENIS

VOLTAGE: 9.6 to

16 volts.

TYPICAL CURRENT

DBAIN:

quiescenl,

13 mA during

processing, and

46 mA dudng

analog maasur€filent.

BATTERIES: Any 12

voll battery

can bo connected

paimary power

source.

Se\rsral

porcr

suPply

options are availabl€

kom

Campbell

Sci€ntific.

PHYSICAL

SPECIFICATIONS

SIZE: 8.4'

x 1.5' x 3.9'

Additional

dearance

required

lor

CSI serial

UO and

8€nsor

leads.

WEIGHT:15 oz.

WARRANTY

Thr€e

yea6

against

def€cts

mat€rials and

uodmanshiD.

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Campbell CR500 Especificaciones Pagina 5

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