KROHNE OPTISYS TUR 1050 EN - Manual (Page 39)

OPERATION
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OPTISYS TUR 1050
www.krohne.com 11/2012 - 4002444301 MA OPTISYS TUR 1050 R02 en
5.7.4 Configuring the alarm relays
The device has two alarm relays that operate as two independent programmable alarms. To fully
program each alarm, you have to input the work mode of the alarm function, the alarm set point
and the delay time for the alarm.
Work mode of the alarm function
• HI: the relay changes state when the measured turbidity level is higher than the programmed
alarm level for the chosen alarm delay time.
• LO: the relay changes state when the measured turbidity level is lower than the programmed
alarm level for the chosen alarm delay time.
• OFF: this option completely deactivates the alarm functions.
• ERROR: the relay changes state when an internal error occurs.
Alarm set point
This is the level at which an alarm activates. You can adjust the alarm set point to any valid
turbidity level over the range of the device in steps of 0.01 NTU/FNU.
Alarm delay times
The alarm delay time prevents activating the alarm when the measured turbidity level exceeds
or falls below the alarm set point just for a short time. There are two options:
• Delay on: with this option you can define a time period; the turbidity level must exceed the
alarm set point for this time period before the alarm starts. Example: if you selected an alarm
set point of 50 NTU/FNU and an alarm delay time of 5 seconds, then the measured turbidity
must exceed 50 NTU/FNU for at least 5 seconds to start the alarm.
• Delay off: similar to the option "Delay on" you can define a time period; the turbidity level
must not fall below the alarm set point for this time period before the alarm stops. Example:
if you selected an alarm set point of 50 NTU/FNU and an alarm delay time of 5 seconds, then
the measured turbidity must fall below 50 NTU/FNU for at least 5 seconds to stop the alarm.
If you have completed all settings for the output as described in the previous sections, the device
moves to the submenu for the alarm configuration. At first you see the following display:
• Use the buttons ↑ and ↓ to select the desired work mode (HI, LO, OFF, ERROR) or leave the
setting.
• Accept your selection by pressing ^.
i If you chose "OFF" or "ERROR", a prompt appears to set up the alarm for the second relay
(see below in this section). If you chose one of the other options, a prompt appears to set up
the alarm set point.
AUTO
CAL
CONFIG