K-Patents PR-21-S - Manual (Page 84)

78 PR-21-S instruction manual
8.3 Wash
8.3.1 Message EXTERNAL HOLD
The concentration measurement is on HOLD due to an external switch closure. For
explanation, see Section 6.4, “Configuring input switches”.
8.3.2 Messages PRECONDITIONING , WASH , RECOVERING
−
PRECONDITIONING : An optional preconditioning relay is closed, see Section 6.7
“Configuring prism wash”.
−
WASH : The internal wash relay is closed, see Section 6.7 “Configuring prism
wash”.
−
RECOVERING : The concentration measurement is on HOLD during a preset time.
8.3.3 Message PRISM WASH FAILURE
No dip of n
D
value during prism wash. The accepted size of the dip is set as the
WASH CHECK function, Section 6.7, “Configuring prism wash”. See also Section 5.1.3
“Testing prism wash”.
8.3.4 Message EXTERNAL WASH STOP
Tells that wash action is prevented because an EXTERNAL WASH STOP switch is closed,
see Section 6.4 “Configuring input switches”.
−
NO SAMPLE (Section 8.2.6) indicates empty pipe
8.3.5 Message LOW TEMP WASH STOP
Tells that wash action is prevented because of LOW TEMP : low process temperature
indicates empty pipe. To set the limit, see Section 6.7 “Configuring prism wash”.
8.3.6 Message NO SAMPLE/WASH STOP
Tells that wash action is prevented because of NO SAMPLE : the process pipe is empty
and the prism is clean.