U2 COMBINATION VIEWING HEAD AND SIGNAL PROCESSORS
66-2071—02
8
Filter IR
NOTE: If sensor is not available in your model, then no menu item will exist for sensor setting. See Table 1 on page 2 to
determine which sensors are active in your U2 model.
Displays the current IR high pass filter (adjustable 0-9). The default filter is 3. See the filter cutoff frequencies (in Hertz) in the
table below.
mA Out
Displays the current output gain (adjustable 0-99) or “OPEN” if
the current output is open. The default value is 32.
Flame On
Displays the flame on value (adjustable 51-3425). The flame
on value can not be adjusted below the flame off value. When
the flame count is greater than the flame on value for greater
than the time delay value, the flame relay will energize. The
default value level is 800.
Flame Off
Displays the flame off value (adjustable 50-3424). The flame
off value can not be adjusted above the flame on value. When
the flame count is less than the flame off value for greater than
the FFRT value, the flame relay will de-energize. The default
value level is 600. Flame off is usually set to approximately 2/3
the value of flame on, however this value should never be less
than 100.
FFRT
The flame failure response time is the time it takes for the
flame relay to de-energize after the flame count falls below the
flame off value. FFRT (flame failure response time) can be set
to 1, 2, or 3 which will not exceed 2, 3, or 4 seconds
respectively. The factory default value is 1 second.
Time Delay
The time it takes for the flame relay to energize after the flame
count rises above the flame on value. Time delay can be set to
0, 1, 2, or 3. The factory default value is 3 seconds.
File
The U2 is able to store up to 8 different file configurations (file0
– file7). Settings that are stored include: UVT gain, SSUV
gain, IR gain, SSUV filter, IR filter, mA output, gain, flame on,
flame off. File 0 is default. NOTE: The U2 touch wheel
interface allows access to all eight files for changing
parameters, however, the file selection cannot be changed via
the U2 interface; it can only be changed via the “File Select”
wire input or modbus. Only two files, “0” and “1” may be
automatically activated by changing the voltage input to the
“File Select” wire (purple or black #9). Refer to Table 3. When
the file select line is grounded, the file selection = “0”.
NOTE: The file input wire should not be left uncon-
nected or in an unknown state. If not being used
or if using the default file 0, connect the file input
wire to ground.
When connected to 24 Vdc, the file selection = “1”. The other
means of selecting and activating a file is via the Modbus RTU
interface using register address 40093. Modbus interface can
be accomplished via FlameTools software or another Modbus
RTU interface.
Panel
Tapping the ENTER/STORE button when PANEL appears on
the menu screen will provide access to two sub-menus;
Panel Lock and Time Out.
The Panel Lock sub-menu enables or disables a security
feature that locks the U2 interface, preventing any parameter
modifications. To enable this feature, a special 4-digit access
code is required, which is available from the factory. It requires
that same code to unlock, allowing parameter changes after it
has been enabled. Once the Panel Lock feature is enabled by
entering the code, the panel is locked out immediately from
further adjustment. If a user attempts to modify any U2
parameters while the Panel Lock feature is enabled, a lockout
message will appear on the display. The display will show
“Bad” upon entry of an incorrect access code. If the password
is forgotten or lost, the user must contact the factory for
assistance with unlocking the panel. At that point, the user can
reset or deactivate the password. Once the appropriate code
is entered and the Panel Lock sub-menu accessed, it is
automatically disabled. The default setting for the Panel Lock
feature is disabled/OFF.
The Time Out sub-menu allows the user to enter a time
allotment from 0-9999 minutes in which to allow adjustments
of settings before the panel returns to monitoring mode and
the touch wheel disables itself if there is no menu activity.
Panel Time Out helps prevent accidental changes to
parameter settings. Once the panel has timed out, to modify
settings, simply enter “1234” as prompted by the display. The
Panel Time Out is by default 9999 minutes.
NOTE: If the display shows “9999”, it can also indicate
saturation of the UVSS and/or IR sensor. If the
problem persists after checking the panel
lockout feature and resetting as described
above, refer to the Troubleshooting section of
this document for instruction.
Auto Gain
NOTE: Auto Gain and Auto Filter cannot be used with
U2-1016-PF model.
Routine that automatically determines the gain for the IR and
SSUV sensors (that are on) necessary to generate a total
flame count of approximately 1200. Be sure that all desired
sensors are turned on (gain of at least 1) before the routine is
run.
FILTER
0
1
2
3
4
5
6
7
8
9
HERTZ
9
16
24
33
52
75
100
155
215
300
