Campbell Scientific CR10 CR10 Measurement and Control - Page 31

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ovERvlEw

01:1

One

repetition

02:10

Output the time of

the

daily minimum in hours

and

minutes

03:2

Data

source

is

lnput

Storage Location

2.

The

program

to

make

the

measure^"itt

and

to

send

the

desired

data

to

Final

Storage has

been

entered.

At

this

point, lnstruction

96 is entered to enable

data

transfer from

Final

Storage

to

Storage Module.

10:P96

Activate Serial Data Output.

1:71

Output

Final Storage data

to

Storage Module.

The

program

is

complete.

The

clock must now be sef so that the date and time tags are correct.

(Here the example

revefts back

to the key by key format.)

lnstruction

#

(Loc.:Entry)

09:

P74

Kcy

*5

A

Parameter

(Par.#:Entry)

Descrigljon

Minimize instruction

Disolay

Exolanation

00:21:32

Enter

*5

Mode.

Clock

running but not set correctly.

05:00

Advance

to

location for year.

86

05:86

Key

in

year

(1986).

A

05:0000

Enter and advance

to

location for Julian day.

197

05:197

Key

in

Julian day.

A

05:0021

Enter and advance

to

location

for

hours

and

minutes (24

hr.

time).

1324

05:1324

Key in hrs.:min. (1:24 PM

in

this example).

A

:13:24:01

Clock set

and

running.

LOG

1

Exit

.5,

compile

Table

1,

commence

loqging data.

*0

OV6.

DATA RETRIEVAL

OPTIONS

There

are several options for data storage and

retrieval.

These

options

are

covered

in

detail

in

Sections

2,4,

and

5.

Figure OV6.1-1

summarizes

the various possible

methods.

Regardless

of

the

method used,

there

are

three

general approaches

to

retrieving data

from

a

datalogger.

1)

On-line output

of

Final Storage data to a

peripheralstorage

device.

On

a regular

schedule, that storage

device

is

either

"milked" of its data

or

is brought back

to

the

office/lab where

the

data

is

transferred

to

the

computer.

In

the

latter

case, a

"freSh"

storage device is usually left

in

the field

when the full

one

is

taken

so that data

collection can

continue

uninterrupted.

2)

Bring a storage device to the

datalogger

and milk all

the

data

that

has accumulated

in

Final Storage since

the

last visit.

3)

Retrieve the data over some

form of

telecommunications

link,

whether

it be

RF,

telephone,

short

haul modem, or satellite.

This can

be

performed

under program

controlor

by regularly scheduled polling of

the dataloggers.

Campbell Scientific's

TELCOM

program automates

this

process

for

IBM PCIYT/AT/PS-2's and compatibles.

Regardless

of

which

method is used,

the

retrievalof

data from

the

datalogger

does

NOT

erase those data

from

Final

Storage.

The

data

remain

in

the

ring memory until:

They

are written over by new

data

(Section 2.1)

Memory."is

reallocated (Section

1.5)

The

power to the

datalogger

is

turned

otf.

Table OV6.1-1

lists

the

instructions used with

the

various

methods of

data

retrieval.

ov-l7

Campbell Scientific CR10 CR10 Measurement and Control - Page 31

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