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Data Storage and Transfer

Up to 18,800 (expandable to 280K) raw or processed data points can be stored in the CR7’s memory. Data are trans-

ferred to a computer via telecommunications or on-site data retrieval options.

Software

We offer Windows or DOS-based datalogger support software that

provides telecommunications, programming, data transfer, data

processing, and graphical display functions. With an appropriate

communication link, the software supports two-way communica-

tion between the CR7 and IBM-PC or compatible computers.

Display

The CR7’s keyboard/display provides on-site review of data and

programs. Annotated datalogger programs and labeled data values

can be displayed on a computer monitor. The DSP4 Heads Up

Display provides a dashboard-mounted luminescent display for

vehicle test applications.

Storage Modules

Rugged, battery-backed RAM SM192 or SM716 Storage Modules

(96K or 358K data values, respectively) can be left connected to the

CR7 or carried to the field to retrieve data from the CR7’s memory.

Two storage modules can be connected to one CR7. Operational

temperature range is -35° to +65°C (extended range available). The

SC532 Interface is used to transfer data and/or programs between

the storage module and a PC.

Card Storage Module

The CSM1 Card Storage Module is a read/write module that either

remains with the CR7 or is transported to the datalogger site.

Battery-backed RAM memory cards are inserted into the CSM1 for

data and/or program transfer. The system operates over a

-20° to +50°C range (extended range available).

Direct Line Options

Direct Datalogger-to-Computer Interface

The SC32A RS-232 Interface supplies an optically isolated connec-

tion between the CR7 and a computer over distances up to 50 ft.

Short Haul Modems

The SRM-6A short haul modems provide local communication

between the CR7 and a computer with an RS-232 serial port. The

modem transmits data up to 11.2 miles over a four-wire uncondi-

tioned line (two twisted pairs).

Coax Network

The MD9 Multidrop Interface links a central computer to over 200

dataloggers on a single coaxial cable. Total coax cable length can be

up to three miles.

Radio Frequency (RF) Communication

Campbell Scientific’s RF communication system uses the RF95

modem and a low-powered transceiver at the remote station(s) with

a transceiver connected to an RF232 Base Station at the computer

site. Up to 255 stations can be interrogated over a VHF or

UHF frequency.

Telephone Networks

Telephone communication links require a DC112 modem at the CR7

site and a Hayes-compatible modem at the calling end. Cellular

communications are supported with our COM100 transceiver.

Phone-to-RF and phone-to-MD9 networks are also available.

Display

Storage

Module

Card Storage

Module

Multidrop

Modem

Shorthaul

Modem

RF Modem Phone

Modem

Satellite

Interface

Transceiver

Multidrop

Modem

Storage

Module

Card Storage

Module

Direct

RS-232

Interface

Shorthaul

Modem

Phone

Modem

Satellite

Ground

Station

RS-232

Interface

RS-232

Interface

RS-232

Interface

Transceiver

RF Base

Station

RTD 3

MADE IN USA

+12

720 I/O MODULE

ANALOG INTERFACE

I. D.

DATA

1 2 3 A

4 5 6 B

7 8 9 C

0 # D

OFF

AUX.

POWER

MADE IN USA

CR7 MEASUREMENT & CONTROL SYSTEM

700X CONTROL MODULE

SERIAL I/O

CAMPBELL

SCIENTIFIC

INC.

LOGAN, UTAH

H H H H

1 2 3 4

724 PULSE COUNTER

H L H L H L H L H L H L H L H L H L H L H L H L H L H L

1 2 3 4 5 6 7 8 9 10 11 12 13 14

1 2 3 4 5 6 7 8 1 2

SWITCHED ANALOG OUT

CONTINUOUS ANALOG OUT

1 2 3 4 5 6 7 8

DIGITAL CONTROL OUT

725

EXCITATION

726

50 VOLT INPUT

H L

SOLAR

TEMP C

RH %

Scale = Auto

Logger Time 00:03:54

Flags

Ports

H=Help

= Graph enter/exit

= Re-scale

= Incr. auto exponent

= Decr. auto exponent

V = View save to file

F1. . F8 = Toggle flags

P1. . P6 = Toggle ports

C = Collect data

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Campbell CR7 Manuale Utente Pagina 4

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