CMT CMT-300 - Introduction

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INTRODUCTION

The

CMT-300

Programmable

Measurement

System

is

designed

to

work

in

conjunction

with

the

HP-41C

/41CV/41CX

series

calculators

as

a

powerful

programmable

hand-held

measurement

system.

This

device

is

capable

of

measuring

DC

Voltage,

true

RMS AC

Voltage,

Resistance,

DC

Current

and

true

RMS

AC Current

within

the

following

ranges:

DC

Voltage

-

.2

V, 2

V,

20

Vv,

200

Vv,

350

V

AC

Voltage

-

2

V,

20

V,

200

Vv,

350

V

Resistance

-

2

KOHM,

20

KOHM,

200

KOHM,

2000

KOHM

DC

Current

-

.2

A

AC

Current

-

.2

The

measurement

function

and

range

of

operation

are

selected by

means

of

software commands.

You

can

also work

in

the

autorange

mode

where

the

range

is set

automatically.

The

CMT-300

has

three input terminals:

VOLTS

(red)

for

voltage

measurements,

A/KOHM

(green)

for

cur-

rent

or

resistance

measurments,

and

COM

(black),

the

circuit

common.

At

the

other

end

of the

device

is

a

connector

that

plugs

directly

into

any

port

of

the

HP-41.

(Before

connecting

your

CMT-

300

to

the

calculator

for the

first

time,

be sure

to

read

and

follow

the

instructions

given

in

Connecting

the

CMT-300

to

the

HP-41,

Section

1.)

The

CMT-300

comes

with

a

keyboard

overlay

that

labels

the

HP-41 keys used

in

the

application

programs.

Two

test

probes

and

a

spare

fuse

are

also

provided.

The

built-in

software

commands

of

the

CMT-300

makes

it

flexible

enough

to

be

customized

for

many

different

applications.

We

have

included

in

the

firmware

a

few

applications

that

we

feel

will

be

most

frequently

used.

One

of

our

application

programs

(DMM)

allows

you

to

use

the

CMT-300

much

like

a

normal

digital

i