Honeywell DCP552 Mark II User Manual

The 

is equipped with the self-diagnostic functions described below. Alarm codes and the result of self-

diagnostics are listed on the following pages.

■

●

This routine is designed to detect errors in the RAM backup function. When a

failure is detected, a general reset is performed. No alarm code is displayed.

●

This routine detects failures caused when boards (circuit boards) not designed to

be used with the 

. Alarm codes are displayed when errors are detected.

■

●

Failures are detected when the analog input signal due to disconnection or other

cause lies outside the –10.0 to +110.0% range.

Alarm codes are displayed when errors are detected.

■

●

This routine is designed to detect errors in system programs stored in the PROM.

Not totally infallible, there are cases where errors go undetected and result in

measuring device operation failure.

Alarm codes are displayed when errors are detected.

●

This routine detects errors in analog inputs and output adjustment data stored in

non-volatile memory. Alarm codes are displayed when errors are detected.

●

This routine detects failures in program setting data stored in a backup RAM.

Alarm codes are displayed when errors are detected.

●

This routine detects failures in parameters stored in a backup RAM. Alarm codes

are displayed when errors are detected.

●

This routine detects low voltage conditions in the battery that backups RAM data.

The 

BAT

LED on the console goes on when battery voltage is too low.