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Entek IRD 6687 Protection Monitor
6687 Monitor
TX OK submenu
The TX OK submenu has the following options. These determine the limits used for
detection of transducer faults.
Note: The 6687 maintains a minimum of 1 volt and a maximum of 24 volts difference between the
TX LO and the TX HI values, so it is not possible for the TX LO value to be greater than the
TX HI value.
RELAYS submenu
The RELAYS submenu has the following options. These options apply to both channels of
the monitor.
Note: The LATCHED option also affects all status messages that apply to alarms, including the
TX FAIL message. This means you must press RES to clear the status message if
LATCHED is set to YES.
Factory menu
→
TX OK
TX HI
1
TX LO 2
TX HI
2
EXIT
TX LO 1
SET
TX LO 1
Choose the most negative acceptable transducer voltage for channel 1
(–24.00 to 23.00 volts).
TX HI 1
Choose the most positive acceptable transducer voltage for channel 1
(–23.00 to 24.00 volts).
TX LO 2
Choose the most negative acceptable transducer voltage for channel 2
(–24.00 to 23.00 volts).
TX HI 2
Choose the most positive acceptable transducer voltage for channel 2
(–23.00 to 24.00 volts).
EXIT
Return to the Factory menu. The monitor remembers the current values
for menu options, but does not write them to memory until you exit the
Factory menu.
LATCHED
YES
DELAYS
EXIT
SET
FAILSAFE
A D
Factory menu
→
RELAYS
FAILSAFE
Choose failsafe or nonfailsafe operation for the alarm relays. Failsafe
operation is explained below this table. You can choose failsafe for both
alarm level relays (A D), only one alarm level relay (– D or A –), or no
alarm relays (NO). Note that the System OK relay is always in a failsafe
condition.
LATCHED
Choose whether the monitor stays in the alarm state even when the signal
condition that caused the alarm has ended (NO, YES). YES means the
operator must press the RES button on the monitor to acknowledge the
alarm and reset the relays. NO means the monitor resets the relay once the
alarm condition has passed.
DELAYS
Display the DELAYS submenu (page 24) for alarm delays (such as the
global alarm delay or the start-up period).
EXIT
Return to the Factory menu. The monitor remembers the current values
for menu options, but does not write them to memory until you exit the
Factory menu.
