K-Patents PR-01-S - Manual (Page 89)

INSTRUCTION MANUAL FOR K-PATENTS PR-01-S (-AX/FM/CS) DOCUMENT/REVISION No. INM 1/14
Effective: May 15, 2009
87
WASH
STOP ?
EXTERNAL
HOLD ?
Start
prism
wash
REMOTE WASH
SWITCH
NO
YES
YES
NO
Automatic Wash start
1. Wash interval timer
2. Smart Wash
YES
NO
PRECONDITIONING
WASH
RECOVERY
WASH
CHECK
OK?
RETRY
WASH ?
NO
YES
“Prism wash
failure“
Reset “Prism
wash failure“
Manual
Figure 9.41 Wash decision logics.
WASH STOP LOGICS:
1. The preconditioning and wash relays are not activated by automatic wash start under "Low conc/no
sample", Section 6.30, as this indicates a clean prism in an empty process line.
2. Wash can be prevented when the process temperature is below a limit. The Wash stop function is used
to prevent steam wash when the process pipe is empty or when the process is stopped. To activate the
"wash stop" key sequence Calibrate/Parameters/1. Prism wash/Wash stop/1. Activate and set the
temperature limit. The default value for wash stop is inactive. When the wash is not accepted the
diagnostics message is "Wash stop/temp. limit", see Section 6.3.
3. Wash can also be prevented by an external contact closure, telling e.g. that the process pump has
stopped. See Section 2.8, paragraph 3.3.