Hach Polymetron 9500 User Manual page 31

Option
PWM CONTROL
FREQ CONTROL
WARNING
6. From the RELAY SETUP menu, select SET TRANSFER and choose ACTIVE or INACTIVE.
7. From the RELAY SETUP menu, select FAIL SAFE and choose YES or NO.
8. From the RELAY SETUP menu, select ACTIVATION. The activation options for the selected
function appear.
9. Test the relay function to make sure it is properly energizing the connected device. To do relay
testing, Push the menu key and select TEST/MAINT>TEST RELAY.
• Scheduler function (refer to
Option
HOLD OUTPUTS
RUN DAYS
START TIME
INTERVAL
DURATION
OFF DELAY
Figure 16 Scheduler function
1 Duration
2 OFF delay
• Alarm function (refer to
Option
LOW ALARM
HIGH ALARM
Description
Relay uses a PWM (Pulse Width Modulation) control depending on a
process value
Relay switches with a frequency depending on a process value
Relay indicates warning and error conditions in sensors
Figure 16)
Description
Holds outputs in the present ON or OFF state
Sets the weekday(s) that the relay operates.
Sets the start time.
Sets the time between activation cycles (default value: 5 min).
Sets the period of time the relay is energized (default value: 30 sec).
Sets the time for additional hold/output time after the relay has been turned off.
Figure 17)
Description
Sets the value where the relay will turn on in response to decreasing measured value.
For example, if the low alarm is set for 1.0 and the measured value drops to 0.9, the
relay activates.
Sets the value where the relay will turn on in response to increasing measured value.
For example, if the high alarm is set for 1.0 and the measured value increases to 1.1,
the relay activates.
3 Interval
4 Time (x-axis)
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