Hach POLYMETRON 9135 Operator's Manual page 52

Ph/redox measuremen
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Transmitter 9135 - pH/redox measurement
CONTROLLER
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
Select
Page 48
Different controller modes are available. They
enable
a
frequency,
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 :
• Pulse
MODE :
• Freq.
• Pul./Frq
• Frq./Pul.
Value of the setpoint :
POINT :
XXXX – In pH or mV
Neutral zone range : zone around the setpoint
where the regulation is not activate d.
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
a
pulse
or
a
S1 & S2 in pulse
control
S1 & S2 in frequency
control
S1 in pulse control
/S2
in
frequency
control
S1
in
frequency
control /S2 in pulse
control
mixed

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