Operation - Honeywell 700 User Manual

ACCESSORIES
Orifice disks (kit M-702-6) - Used to reduce the signal
brightness in cases where the signal brightness is too strong.
Located immediately in front of the lens, it will reduce the
amount of signal to the sensor. Bag assembly contains orifice
disks and retaining rings. Orifice disks come with 3/8, 1/4,
3/16 and 1/8 inch diameter holes. Contact the factory for
guidance in using orifice disks.
Insulating nipple (R-518-13) - 1/2-in. NPTM Ultem heat and
electrical insulating nipple typically used in conjunction with a
swivel mount and union.
VH insulating mounting block (700UA, 800UA) - 1/2 in.
NPTF Ultem heat and electrical insulating mounting block,
used in place of the supplied Delrin mounting block. 1/4 in.
NPTF purge air connection. Typically used in conjunction with
a swivel mount. Rated for continuous service up to 320°F
(160°C).
Swivel mounts, small (700-1, 700-2, 700-3) - All have 1/2 in.
NPTM viewing head connections on one end with varying
process connections including 1 in. NPTF, 1/2 in. NPTF and
1/2 in. flanged.
Swivel mounts, large (M-701-1, M-701-2, M-701-2-FLG, M-
701-2-SS, M-701-3, M-701-3P, M-701-4) - All have 1 in NPTF
viewing head connections, one end with varying process
connections including 2 in. pipe slip on, 2 in. NPTF, 2 in.
flanged, 2 in. NPTF in stainless steel construction, 4.5 in.
flanged with 3 bolts, 3 in. NPTF and 2-bolt flanged.
Appropriate fittings must be used to adapt the 1/2 in. NPTF
viewing head process connections.
Insulating locking coupler adapters (R-518-PT13, R-518-
PT13L) - 1/2 in. NPTM Ultem adapters insulate the viewing
head electrically and thermally and are used with the R-518-
CL13-HTG locking couplers. The R-518-PT13L has a quartz
lens.
Locking coupler (R-518-CL13-HTG) - Used with the R-518-
PT13 and R-518-PT13L insulating locking coupler adapters.
Process connection end is 1/2 in. NPTF.
Connector
ASY786 --> Replacement field wireable connector.
Cable and Connectors - S70X/S80X Viewing Heads
ASY785 --> 50 foot C330S cable with pre-wired ASY786
connector.
ASY785-200 --> 200 foot C330S cable with pre-wired ASY786
connector.
Cable (C330S) - 4-conductor with drain, foil/braided shield.
Sold per foot.
Isolation Units (ISO-UNIT, ISO-UNITSS, ISO-UNITHPGT) -
All have 1 in. NPTF connections with 1/2 in. NPTF purge ports
and quartz window. Black anodized aluminum or stainless
steel construction. The HPGT version has a 1/2 in. thick
quartz window for higher pressures. Appropriate fittings must
be used to adapt the 1/2 in. NPTF viewing head process
connections.
Air cooling canister (700ACC, 800ACC) - Has an air inlet
port on side. Used with vortex coolers. S80X models can be
used with the 700ACC if the 800ACC-RING adapter is used.
HONEYWELL MODEL 700/800 SIGNAL PROCESSOR AND VIEWING HEAD
Vortex coolers (M3204, M3208, M3210, M4025) - Used with
air cooling canister. Contact your distributor or the factory for
selection assistance.
Cable restraints (800CR, 700CRLT) - Liquid tight S80X and
S70X cable restraint versions. The 800CR includes the
700CRLT and the 800ACC-RING adapter.
S80X adapter ring (800ACC-RING) - Adapter ring to fit S80X
viewing heads to 700ACC cooling jacket and 700CRLT liquid
tight cable restraint.
Mounting blocks (700DA, 700DA-1, 800DA) - Delrin
replacement adapter/mounting blocks for S70X and S80X
viewing heads. All have 1/4 in. NPTF purge air connections.
Rated for continuous service up to 180F (82C). The 700DA
and 800DA have 1/2 in. NPTF process connections while the
700DA-1 has a 1 in. NPTF process connection. For more 1 in.
NPT accessories that can be used with the 700DA-1, refer to
the S55XBE manual, 66-2064.
USB to RS422/RS485 Converter (COMMOD) - Protocol
converter for use with external communication with a remote
computer.
Fiber Optic System Compatibility - The S70X and S80X
viewing heads are compatible with the Honeywell FASA fiber
optic extension products. The S700FOAD and S800FOAD
adapters are applicable, depending on the application.
Contact your distributor or the factory for assistance with fiber
optic selection and pricing.

OPERATION

IR Detector
The S702 and S802 viewing head models use a Germanium
photodiode, which responds to IR radiation/flicker in the flame.
Flame flicker is caused by the combustion, or forced air
injected in to the flame. Combustion air can be mixed with the
fuel (pulverized coal) or can be introduced separately. In either
case, forced air is introduced in such a way as to aid the
combustion process. This air is usually made turbulent by
causing it to swirl with spin vanes located in the burner throat.
Flame flicker is created when turbulent air mixes with the
flame. It is composed of random frequencies and the amount
of high frequency flicker is dependent on the fuel and the
burner.
The S702, S702PF and S802 viewing head models respond
to flicker frequencies above 33Hz. All flicker frequencies below
the filters are ignored, so it is important to sight the viewing
head on the highly turbulent portion of the flame that contains
the higher frequencies. The location of the higher frequencies
can be predicted by examining the burner with regard to
where the turbulent air enters the flame. The optimum scanner
location is parallel to the burner center line (Fig. 16). The use
of a swivel mount is encouraged to allow for line of sight.
UV Detector
The S706, S706PF and S806 viewing head models use the
UVTron tube, with a spectral response of 185-260nm and
peak response of 210nm to ultraviolet radiation. The output of
the detector is a pulse stream of randomly spaced pulses
whose average rate is proportional to the UV radiation present
in the flame. The UV radiation is a direct result of the
11 66-2069EP—04