To Next Page

To Previous Page

Technical Information

Motor circuit check

At power up and at regular intervals thereaer, the mo-

tor circuit is checked to ensure that no power is being

applied to the motor unless the motor is actually on. If

the soware detects power being applied to the motor

at any other time, it initiates an alarm (either beep or

vibrate) and no longer attempts to deliver medication.

During every pump activation, the soware checks to

see whether the motor completes one activation. If the

motor fails to turn, or fails to complete an activation, the

soware stops medication delivery, initiates an alarm

(either beep or vibrate) and a system fault alarm message

appears in the display.

Keypad encoder check

Every time the soware receives data from the keypad, it

is checked. If the data is not a valid keypress, the so-

ware disregards the keypress.

Data handling and

software safety features

Data stored in RAM

Before use, data associated with delivery and stored in

RAM is tested by calculating a CRC on the data and

then comparing it with CRC stored in the data. If the

stored and calculated data do not match, the soware

stops medication delivery, initiates an alarm (either beep

or vibrate) and a system fault alarm message appears in

the display.

Data stored in NOVRAM

Before use, data associated with delivery and stored in

NOVRAM is tested by calculating a CRC on the data

and then comparing it with CRC stored in the data. If

the stored and calculated data do not match, the so-

ware stops medication delivery, initiates an alarm (either

beep or vibrate) and a system fault alarm message ap-

pears in the display.

Smiths Medical CADD-MS 3 User Manual

Questions and Answers: