Hach-Lange SI794 C User Manual - Manual (Page 83)

83
The arrows indicate
which relay (valve)
is active:
Controller
characteristic
+100 %
-100 %
Relay 2 active
(Meas. value >
setpoint)
Relay 1 active
(Meas. value <
setpoint)
Setpoint
Controller
output
Momentary controller output (adjusted value has
not been saved yet)
Controller test (manual specification of controller
output)
• Press conf, enter code: 5559
After function activation “Ctrl” is displayed for
approx. 3 sec. With the controller turned off, “OFF”
is displayed in addition, then return to measuring
mode.
The function is used to start up control loops or
check the actuators.
For bumpless changeover to automatic opera-
tion (exiting this function), configure an I-action
component (reset time).
Specify value:
Select using4key, edit number using5key.
Press enter to proceed.
The transmitter is in Hold mode.
Press enter to return to measurement (Hold remains
active for another 20 sec).
Controller output -100 to 0 %: Relay 2 active
Controller output 0 to +100 %: Relay 1 active
Display Action / Remarks