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Rolling Thin
Film Oven
(RTFO)
Model CS 325-B
AASHTO Designation T240
ASTM Designation D2872
| The rolling thin film oven test is used
to measure the effect of heat and air on a moving film of semi-solid asphaltic
materials. The results of this treatment are determined from measurements
of the asphalt properties before and after the test. |
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General Description
The CS325-B precision rolling thin film oven (RTFO) is designed
for the specific requirements in the State of California
method 346, AASHTO T240 and ASTM D2872.
Repeatability of the test is directly related to the accuracy
with the oven temperature can be maintained to the specific standard temperature
of 163°C, and the reproducibility of the thermal rise time of the system.
The CS325-B has been designed to perform or
exceed the specification requirements as detailed by AASHTO and ASTM.
The oven temperature is sampled by a
precision RTD sensor exposed to the supervised environment. The thermal mass of
the sensor is extremely low having a thermal/electrical time constant measurable
in seconds. The controller accepts the signal from the RTD sensor and precisely
displays the process temperature while providing an accurate output control
signal to maintain the process at the required control point. The
controller operates in the PID mode. It has a programmable auto tune feature
which automatically establishes the tuning constants. The PID constants may be
fine-tuned by the operator at any time, if desired, and secured from further
modification by unauthorized personnel. The controller employs a unique
suppression feature which allows for the quickest response time without
excessive overshoot. Dual 4 digit displays allows viewing of the process
temperature and set point simultaneously.
The CS325-B Rolling Thin Film Oven is double walled
and designed to conform exactly to the AASHTO and ASTM specifications.
Please see below.
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INTERIOR VIEW
Net Weight
Shipping Weight
Overall Dimensions
Shipping Dimensions |
254 lbs.
500 lbs.
40"W 36"H 26"D
48"W 46"H 35"D |
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SPECIFICATIONS
| Construction |
16 gauge welded steel exterior.
18 gauge corrosion resistant stainless steel interior. |
| Insulation |
3-1/2 inches of high density fiberglass insulation |
| Controller |
Programmable micro processor UL listed |
| Display |
Temperature - 4 digit red LED's
Set point - 4 digit green LED's |
| Thermal Protection |
Prevents oven from overheating in the event of control failure |
| Temperature Range |
Ambient to 200°C |
| Vents |
Double exhaust vents for dissipation of expended volatile from
specimen |
| Flow Meter |
Range 200 - 14000 ML/MIN |
| Air Pressure Gauge |
Range 0 - 100 P.S.I. |
| Air Flow Adjustment |
Needle valve (long taper) |
| Heat Exchanger |
5/16" dia. copper tube |
| Blower Motor |
Model - Grainger 6K092 Thermal protection (manual reset) |
| Rack Motor and Gear Reducer |
Model - NSY-12RG Bodine Protection (fuses)
Or Breakers |
| Voltage |
240v AC 50/60 Hz, single phase, 15 amps, 3500 watts |
TECHNICAL
SUPPORT
Technical Support is provided to all of our customers FREE
of charge. You can reach our Technical Staff through E-mail or contact them
by phone. Our Colfax, California, office is open between 8 am and 5 pm, Pacific
Standard Time, Monday thru Friday, excluding national holidays
Qualified Technicians:
Denis Longnecker
Phone: #530-346-8322 Ext.16
Note:
Please allow a 48 hour response time for E-mail
support questions. For quicker feedback, please include a phone number
where you can be reached during our business hours.
Frequently Asked Questions
| 1. Power Requirements ? |
See Page 4 in the User Manual |
| 2. What is the Max. Air Pressure ? |
Air supply to this unit should not exceed 125 P.S.I., See Page 4
in the User Manual |
| 3. What P.S.I. should I set the Regulator to ? |
Turn regulator until Pressure Gauge reads 50 P.S.I., See Page 4 in the
User Manual |
| 4. Has the Flow Meter been Calibrated ? |
Yes, to 4000 ml we calibrate before shipping, See Page 24 in
the User Manual |
| 5. Do we offer On Site Service ? |
Yes, Please call (530)346-8322 for On Site Service Quotation. |
| 6. Can I Mount a Hood Vent to Oven ? |
Yes, as long as it doesn't Touch the oven or interfere with the performance
of Oven. |
| 7. Which RTD should I be using ? |
See Page 19 in the User Manual |
TROUBLESHOOTING
Note:
In case of apparent malfunction, please check the following points first.
| 1. Noisy Rack Motor ? |
Check chain for adjustment, the Sprocket on the Rack may be tight (adjust
to .020), or you may have a bad motor. |
| 2. Noisy Blower Motor ? |
Check Graphite Bushings (they may be worn), Squirrel cage may be out
of balance or it needs to be tightened, Improper adjustment, Bad Motor. |
| 3. Rack will not Turn ? |
Bad Rack Motor, Check fuse, Sprocket is loose on Motor, Bad Rack Switch |
| 4. Power on, but no Heat ? |
Bad RTD Sensor, Bad connections to heating coils, Check Fuse, Bad Switch,
Check for broken wire from RTD to Controller |
| 5. No Power to Oven ? |
Check wiring from your service panel to oven, Check Fuses, See Schematic
for your Oven Page 20,21 |
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