Specifications

DOTX-45 Dissolved Oxygen System Part 6 – Configuration
DOTX-45 44 -
Fail Out This function enables the user to define a specified value
that the main current output will go to under fault conditions.
When the Relay Option Board is installed, the display will
read Fail Out #1. When enabled to ON, the output may be
forced to the current value set in Fail Val (next item.) With
the Fail Out setting of ON, and a Fail Val setting of 6.5 mA,
any alarm condition will cause the current loop output to drop
outside the normal operating range to exactly 6.5 mA,
indicating a system failure that requires attention.
Press ENTER to initiate user entry mode, and the entire
value will flash. Use the UP arrow key to modify desired
value; selections are ON, OFF. Press ENTER to store the
new value.
Fail Val Sets the output failure value for Iout#1. When Fail Out
above is set to ON, this function sets value of the current
loop under a FAIL condition. When the Relay Option Board
is installed, the display will read Fail Out #1. The output
may be forced to any current value between 4-20 mA.
Press ENTER to initiate user entry mode, and the entire
value will flash. Use the UP arrow key to modify desired
value; selections are between 4mA, and 20mA. Press
ENTER to store the new value.
AC POWERED UNITS ONLY
Fail Out #2 This function sets the fail-mode of current loop output #2
under a FAIL condition. The settings and operation are
identical to Fail Out for output #1.
Fail Val #2 This function sets the value of current loop output #2 under a
FAIL condition. The settings and operation are identical to
Fail Out for output #1.
AC POWERED UNITS ONLY
*Failsafe This function allows the user to set the optional system
relays to a failsafe condition. In a failsafe condition, the relay
logic is reversed so that the relay is electrically energized in
a normal operating state. By doing this, the relay will not
only change state when, for example, an oxygen limit is
exceeded, but also when power is lost to the controller.