IRIS MODEL 700/800 APPLICATION MANUAL
PAGE 12
changed from a new intelligent type to an older UV
type without communications, the display panel will re-
main inoperative until pulses start coming in from the
old UV viewing head. Then the signal processor will
recognize the older UV viewing head, make the appro-
priate changes, and begin responding to the keys pressed
on the front panel.
MODEL 700 COMMUNICATIONS
The Model 700 Signal Processor has two modular phone
jacks for RS-422 communications. The jacks are wired in
parallel so that point-to-point cables can be jumped from
unit to unit to interconnect multiple Model 700 signal pro-
cessors. The RS-422 interface IC is a MAX489. These
ICs can drive up to 32, Model 700 signal processors on
the same bus.
IRIS supplies FlameTools application software for set-
ting up, monitoring and logging the readings from Model
700 signal processors. This software for PCs is avail-
able from IRIS on a CD ROM at no charge. However, to
interface from a PC to the RS-422 bus, an RS-232 to
RS-422 converter is needed. One converter that can be
used is made by B & B Electronics Manufacturing Com-
pany in Ottawa, IL 61350. Their Model 422NOIC con-
verter plugs into a standard DB25 serial port connector
on a PC hookup for this converter to the RS-422 bus is
shown in Figure 13.
Caution: Before Model 700 Signal Processors
are connected to the RS-422 bus their
individual addresses must be set to differing
values. This is easily done from the front panel
on the Model 700. The RESET button is used
to set the address, even though it is not
labeled to indicate this. Press the RESET
button for two seconds and the current
address will appear. Change this with the up
and down arrow keys, then store the new
address.
MODEL 800 COMMUNICATIONS
The section on MANUAL SETUP OF SET POINTS
– MODELS 700 AND 800 explains that the stereo
phone jack on the front panel of the Model 800 can be
connected to a computer, a PDA or to a setup program-
mer. The cable for the computer or PDA connection is
shown in Figure 14 and is available from IRIS; the setup
programmer and cable for it, also available from IRIS,
are shown in Figure 15.
The serial communications jack on the Model 800 signal
processor can be used for manual setup of set points,
as well as for data acquisition. IRIS data acquisition
software is available which permits multiple Model 800
signal processors to communicate with a host PC. Con-
tact sales for further information about this.
APPROVALS
The Model 700 signal processors and Models S702,
S702-HF, S702-PF, S702-HF-PF, S706, S706-PF, S802,
S802-HF, and S806 viewing heads have Factory Mu-
tual (FM) Approval for Combustion Safety and Cana-
dian Standards Association (CSA) Certification with
added National Recognized Testing Laboratories
(NRTL/C) Certification.
As well, the above viewing heads are approved and
certified by Factory Mutual and CSA for use in haz-
ardous locations, Class I, Division 2, Groups A, B, C
and D, temerature code T4A. The viewing heads are
approved as sealed and corrosion resistant to NEMA 4
and NEMA 4X by Factory Mutual.
CONTACT INFORMATION
For further information contact:
Sales and applications support:
IRIS SYSTEMS INC.
7583 Vantage Place
Delta, BC, Canada V4G 1A6
Ph. 800-667-IRIS, FAX 604-581-9790
email: flame@iris-systems.com
Factory and repairs:
IRIS SYSTEMS INC.
(JB Systems, Inc.)
4944 113th Avenue N
Clearwater, FL 33760
Ph. 727-545-3900, FAX 727-547-9589
MAINTENANCE
IRIS products have been designed to be fail-safe. Field
preventive maintenance checks should be performed as a
precautionary measure to check for anomalies. We
recommend to periodically check for false readings by
blocking the light source from the sensor and observe the
Signal Processor for a zero output. Our recommended
frequency of this check would be before each start up
and at least monthly during continuous operation.
The manufacturer of the UV Sensor states the normal life
of their Sensor is approximately 10,000 hours of
continuous operation. It is recommended that it is
replaced at that time to maintain optimal operation.
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