MODELS P531, P532 AND P532UI OPERATING MANUAL
A Green heartbeat (one quick green flash each sec-
ond) indicates system normal (self check)
A Red / Green heartbeat (alternating color one
quick flash each second) indicates one or more
viewing heads are Hot (70 deg C or more). Other
system functions are normal.
A Red Inverted heartbeat (Red light with one quick
flash dark each second): The display processor is
not receiving data from signal processor. (Inter-
processor communications error.)
A solid color light or no light or any other flash pat-
tern indicates a system failure. No LED's illuminated
could also indicate a power loss.
The P532 can be made to behave like the P522
Connect a jumper between ground and the P522 pin.
The unit will revert to P522 the next time it is powered
There is no support for viewing head #3 in this mode.
NOTE: If the jumper is installed or removed and the
power is reset then the entire system will revert
back to default settings.
P522 mode operation
Channel Viewing Head assignments:
Channel A Only will be operational (both Prim or Alt)
P 522 will be displayed on the second line
Only channel A Flame relays will operate
If power is applied across Alternate 1 pins, the
channel will revert to the Channel A Alternate con-
The bottom line will display the active selection.
The channel A marginal alarm will function inde-
The alarm can be disabled by setting the trip point
Separation of UV and IR is supported for advanced
Analysis of the Electrical and Digital (Software)
gains for the S55xx Viewing Heads.
The Sx55x viewing heads that are IR equipped have a
two stage gain system.
There is a 7 step electrical "analog" gain that is used
external to the processor to amplify the signal before it
enters the processor. Indicated by the left digit.
Once the signal is at the processor, a "digital" software
gain can then be applied. Indicated by the last two
These gain adjustments may not be transparent to the
user as a slight amount of non-linearity may occur
when changing from one electrical gain setting to an-
During setting a hysteresis is built in to keep small
changes in the digital range. If an analog gain bound-
ary is crossed, a finer adjustment can be achieved by
going back in the other direction.
Note: illegal values for gain between x00 and x37
(except for low range).
The following table is a list of boundaries, for
changing the electrical gain.
IR gain settings transitions for the S55xx viewing