Basic Controller Retrofits
for LINDBERG Furnace, type 47
Dear Client:
The
LORAC company is pleased to offer you the following budgetary proposal covering
the upgrading of the existing control instrumentation for your furnace.
My quotation features the CALCOMMSTM™ model 9300. This instrument
is a stand-alone individual zone controller, with a 3 year manufacturers
warranty. It can be interfaced either by a 232 port or 485 bus to a
laptop or other external PC. The PC (not included) can perform supervisory
and monitoring functions as well as remote alteration of set-point and
other variables.
The controller is a microprocessor based instrument with "auto-tuning"
capability. This feature allows it to "find" the correct control
algorithms (rate, reset and proportional band) automatically. You get
precise control from the first day of operation, with no learning curve.
It also features internal high-low alarms which can be programmed to
protect the furnace from overtemperature or to alert the operator to
an undertemperature condition. Finally, the new controller can be programmed
to "ramp-to-setpoint" a feature which can greatly extend the
useful life of the furnace muffle and heating elements.
Like other modern controllers, the CALCOMMS™ unit is designed to
operate in conjunction with a Solid-State Relay, to regulate current
flow to the heating elements. Therefore, if your furnace is equipped
with older Silicon Controlled Rectifiers replacement of these components
is required. This will eliminate them as a possible cause of problems
in the future and provide you with a number of spare parts to backup
any SCR's that may be in use on any of your other equipment.
The new instruments fit conveniently into the space vacated by the existing
controllers. The solid state relays are mounted behind the covers in
the space currently occupied by the "SCR's". All mounting
bezels, wiring devices and everything else required to complete the
installation is included.
ITEM 1: TRAVEL EXPENSES AND INSTALLATION LABOR.
ITEM 2: TEMPERATURE CONTROLLERS, model 9300 manufactured by CALCOMM™
@ $550.00 each.
ITEM 3: SOLID STATE RELAYS WITH AIR COOLED HEAT SINKS, manufactured
by CONTINENTAL INDUSTRIES @ $105.00.
ITEM 4: DRIVE SYSTEM CONTROL, manufactured by MINARIK. This new
instrument will provide a digital display of belt speed calibrated in
inches per minute. TOTAL COST, $750.00.
TERMS: All items are FOB delivered, to your facility. All charges
are NET-DUE upon completion of the installation and demonstration of
the operational status of all of the components which we install.
DELIVERY: Normally, 2 weeks or better, ARO.
Thank you very much for your interest in our services.
Very truly yours,
THE LORAC COMPANY
Kenneth F. Reynolds
President
Home
Phone:
(928)
776-1151
FAX:
(928)
776-1181
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