Hach sc1000 - Manual (Page 108)

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Advanced Operations
6.3.3.10 Function set to TIMER working mode
INPUT VALUE
Displays the process value read from the selected source after it has been processed by the
internal formula parser (if prompted).
FREQ. Control /PID CONTROL
TIMER
SENSOR
Default value: No source
Select a probe or create a formula which delivers the process value that is to be processed by
the relay card.
OUTPUTS ON HOLD
Default value: NO
There is the opportunity to let the relay 'mark' the sensor configured in the menu SENSOR at the
DURATION time. Other sc1000 modules such as other relay cards or current output cards which
access data of this sensor read this 'mark' and go into hold. To go into hold means the accessing
module does not read the latest measurement from the marked sensor but works with the last
measurement read before the sensor was marked. To activate this function set this menu to
YES. If the sensor shall never let other modules go into hold, set this menu to NO.
Note: The setting OUTPUTS ON HOLD always adapts to the DURATION time.
YES
Adds a check mark to the selected SENSOR at the DURATION time. Other modules (relay card,
output card) accessing the probe go into hold mode as soon as they read the probe check mark.
NO Sensor does not send other modules into hold mode
OFF DURATION
(0 s–65535 s)
Default value: 30 seconds
Sets the period of time for turning off the relay in one duty cycle (provided the DUTY CYCLE
option is set to DIRECT).
DURATION
(0 s–65535 s)
Default value: 10 seconds
Sets the period of time for turning on the relay in one duty cycle (provided the DUTY CYCLE
option is set to DIRECT).
OFF DELAY
(0 s–999 s)
Default value: 5 seconds
Delays the check mark of a probe even if DURATION time has expired.
The OFF DELAY time starts immediately after the DURATION time is expired.
This setting only takes effect if OUTPUTS ON HOLD is set to YES (see OUTPUTS ON HOLD
option).
DUTY CYCLE Default value: DIRECT
DIRECT
Turns the relay ON for the time set in the DURATION menu.
Turns the relay OFF for the time set in the OFF DURATION menu.
REVERSE
Turns the relay OFF for the time set in the DURATION menu.
Turns the relay ON for the time set in the OFF DURATION menu.
INPUT VALUE Displays the process value read from the selected source.
NEXT TOGGLE Indicates the seconds until the relay will toggle.
LOG INTERVAL
Default value: OFF
Sets the interval for logging the displayed value into the data logger.
Options: OFF, 5min, 10min, 15min, 20min, 30min