Campbell Scientific CR10 CR10 Measurement and Control - Page 67

4.3.3

TAPE FORMAT

Data

is

transferred to cassette

tape

in

the

high

speed/high

density

Format

2.

Data

tapes

generated by the CR10

are

read

by

the

PC201

tape

read card for

the

IBM

PC

or by

the

C20

Cassette

lnterface.

The

C20 decodes the tape

and transmits the

data

in

ASCIlto

any external

device equipped

with

a

standard

RS232 interface.

TABLE

4.3-2.

Format 2

Specifications

SECTION

4.

EXTERNAL STORAGE PERIPHERALS

lf you

are

leaving

the

recorder with the CR10 (on-

line output to

tape

enabled with

lnstruction

96) it

is

a

good idea to write a dummy block of data to tape

(5

above) to ensure that

the

recorder

is

correctly

connected. Leave

the

CR10

in

the

*0

Mode.

When on-line,

the

CR10

dumps

data to

tape

in 512

location blocks (unless the option

to

dump

any

new

data

is

selected in lnstruction

96).

When

picking

up

a

data tape

from

a

field

site,

dump

the residualdata

(data

which

has accumulated since

the

last full

block)

before

rgmoving the

tape.

Dump

the

residual

data by entering

the

*8

Mode, advancing through

windows

2

and 3

and

initiating

a

dump.

(The start

and

stop

locations should

be

less

than

512

locations

apart.)

After

removing

the

old

tape,

insed

.

a

new

tape

and

go

through

the

set up steps above.

4.4

PRINTER

OUTPUT

FORMATS

Printer output

can

be sent

in

Final Storage Format

(Appendix C.2), Printable

ASC|l, or

Comma

Delineated

ASCIl.

These ASCII

formats

may also

be

used when data from

the

Storage Modules or

Telecommunications

are stored on disk with

Campbell Scientific's PC208 software.

4.4.1

PRINTABLE ASCII

FORMAT

In

the

Printable ASCII format

each

data point

is

preceded by

a2

digit data

point

lD and

a

(+)

or

(-) sign.

The

lD and

fixed

spacing of the data

points make

particular

points easy to find on a

printed

output.

This

format requires

10

bytes

per data point

to

store on disk.

Figure 4.4-1 shows both high and low resolution

data points

in

a

12

data point Output

Array.

The

example data

contains

Day, Hour-Minute, and

Seconds

in

the 2nd

-

4th

data

points.

REMEMBER!

You

must specifically program

the

CR10 to output

the date and time

values.

The

Output

Array

lD,

Day, and Time are always 4

character

numbers,

even when high resolution

output

is

specified.

The

Seconds

resolution

is

.125 seconds.

Each

full

line of data contains 8 data points (79

characters

including spaces), plus

a

carriage

return (CR) and line

feed

(LF).

lf

the

last data

point in

a

full

line is high resolution, it

is

followed

immediately

with

a CR and

LF.

lf

it is low

resolution,

the

line

is

terminated with a space,

CR

and

LF.

Lines of data

containing

less

than

8

data points are

terminated

similarly after

the

last

data

point.

Data

Low Resolution

High Resolution

C-60 Capacity

(Lo

Res.)

Data

Transfer

Rate

(Lo

Res.)

Block Size

locations

Binary

2 bytes/data

point

4 bytes/data

point

180,000

data

points

(1

side only)

100 data points/sec.

512 FinalStorage

4.3.4

CONNECTING

TAPE TO

CR1O

The

procedure for

setting

up

the

CR10 and

cassette

recorder for transfer to

tape

is as

follows:

1.

Load a

cassette

in

the

recorder and

advance the tape

forward

until the tape

leader is past

the

recording

head.

(lnternal

batteries or AC

power

required.)

2.

Connect

the

SC92A or SC93A to

the

9-pin

D-TYPE

connector

in

the

upper right-hand

corner of the

wiring

panel.

(Via

the

SC12

ribbon

cable

if using

*8

with

CRlOKD

or

modem/terminal.)

3.

Connect

the

plugs on the

free

end

of

the

SC92A

or

SC93A into

the

DC-IN and MIC

(and

Ear if SC93A)

jacks

on

the

recorder.

4.

Simultaneously press

the

RECORD and

PLAY buttons on

the

recorder to

set

it

for

recording.

With

the

DC-IN

Jack plugged

in,

the tape

will

not move

untilthe

dump occurs.

5.

To test

connections

manually initiate

transfer

by Keying

in

the

*8

commands as

listed

in

Table

4.2-1.

The

tape

should

advance as

data

is

transferred.

lf

the

Start

of

dump

location

is

equalto

the

End

of

dump

location, the CR10

willwrite

a

"dummy" block of data to

taPe.

4-5

Campbell Scientific CR10 CR10 Measurement and Control - Page 67

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