Hanna Instruments PCA 310 - Manual (Page 34)

34
WORKING MODE
Three working modes
could be selected for
the analyzer. The selec-
tion is available in
“General Menu” -
“System Functions” -
“Manual Commands”
- “Work Mode”.
The work mode could
be set as AUTOMATIC,
STANDBY or MANUAL.
AUTOMATIC MODE
In this mode the analyzer performs the measurements con-
tinuously accordingly with the settings.
STANDBY MODE
When in standby, the sampling electrovalve is closed, the mea-
surements are stopped and the peristaltic pump is activated
for 2 seconds each 100 minutes to preserve the elasticity of
the tubes.
The display will show “STANDBY” on the first line when in the
measurement mode. The chlorine, pH, ORP, and tempera-
ture displayed values will be all time the last measured ones.
The SYSTEM ERROR LED is always on (no blinking).
Note: When the analyzer exit from STANDBY, the relays and corre-
sponding LED’s are activated only after a new value is read.
MANUAL MODE
For testing, maintenances and setup purposes, the analyzer
has the possibility to use direct manual commands.
In this operating mode, by setting the “Alarm Relay”, “Dose
Cl Rel.”, “Dose pH Rel.”, “Sys. Err. Rel”, “Stirrer”, “Valve”,
“Cell Led” and “Reagent Pump” as “ON” or “OFF” will turn
on or off the corresponding device.
The display will show “MANUAL” on the first line when in the
measurement panels. The displayed values will be the last
measured ones and the measuring sequence is stopped.
When in manual mode the ALARM LED is always on (no blinking).
Dose pH Rel :ON
Sys.Err. Rel:OFF
Stirrer
:OFF
Valve :OFF
Cell Led :OFF
Work Mode:AUTOMATIC
Read On Demand
Alarm Relay :ON
Dose Cl Rel :ON
Reagent Pump:OFF