Transmitter 9135 - pH/redox measurement
Page 48
Different controller modes are available. They
enable a frequency, a pulse or a mixed
pulse/frequency control. Relay S1 (base injection)
and relay S2 (acid injection) ensure the control. The
controller parameters are programmable via the
programming variables below :
CONTROLLER
− Choice to use an integrated controller :
CNTRLLR : • Yes
• No
− Choice of the control mode :
MODE : • Pulse S1 & S2 in pulse
control
• Freq. S1 & S2 in frequency
control
• Pul./Frq S1 in pulse control
/S2 in frequency
control
• Frq./Pul. S1 in frequency
control /S2 in pulse
control
− Value of the setpoint :
POINT : XXXX – In pH or mV
− Neutral zone range : zone around the setpoint
where the regulation is not activated.
NEUT Z. : XXX - In pH or mV
− Reaction time after activating relays S1 or S2 :
delay time after executing the next period.
INERTIA : XXX – In s
− Maximum time out of the neutral zone .After this
period and without returning into the neutral
zone, the system alarm “control too long” is
activated.
CTL TIME : XX – In mn
CNTRLLR : Yes
MODE : Freq.
POINT : 7.00 pH
NEUT. Z : 2.0 pH
INERTIA : 000 s
CTL TIME : 20 mn
RELAY S1
RELAY S2
MANUAL MODE
CONTROLLER
Select
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