Hanna Instruments hi 9914 User Manual
21
If the
CONT/PAUSE switch of the Circulation pump is in
CONT position, the circulation pump will act as described
above.
If the
above.
If the
CONT/PAUSE switch of the Circulation pump is in
PAUSE position, the circulation pump will not run the step 5.
When the low-level sensor is not used, the low-level condition is not sensed
by the controller. The user must take care to stop the user input com-
mand before the water in the tank goes below the low level.
by the controller. The user must take care to stop the user input com-
mand before the water in the tank goes below the low level.
When the high (alarm) level sensor is not used and
the normal level sensor does not work properly, the
controller is unable to detect when the water reaches
the high (alarm) level. In order to stop the control-
ler, the humidity sensor must be placed where it can
sense if the water pours down from the tank.
If the tank assembly is minimal, the irrigation takes place without using
the user input command. Only the normal level and humidity sensors are
used. The controller fills the tank at normal level and begins the Conduc-
tivity & pH correction. The user can add water at any time or wait until
a good water composition is signaled.
the normal level sensor does not work properly, the
controller is unable to detect when the water reaches
the high (alarm) level. In order to stop the control-
ler, the humidity sensor must be placed where it can
sense if the water pours down from the tank.
If the tank assembly is minimal, the irrigation takes place without using
the user input command. Only the normal level and humidity sensors are
used. The controller fills the tank at normal level and begins the Conduc-
tivity & pH correction. The user can add water at any time or wait until
a good water composition is signaled.