Honeywell 800 Series Manual page 26

HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD
VIEWING HEAD
BURNER NOZZLE
NO. 1
66-2069EP—08
NO. 1 FLAME
ENVELOPE
HIGH FREQUENCY LOW FREQUENCY
IR ZONE ZONE (LESS THAN 36HZ)
Fig. 18. Opposed Fired Viewing Head Sighting
26
NO. 2 FLAME
ENVELOPE
HIGH FREQUENCY
IR ZONE
VIEWING HEAD
BURNER
NOZZLE NO. 2
M33287B