Rolling Thin
Film Oven
(RTFO)
Model CS 325-B
AASHTO Designation T240
ASTM Designation D2872
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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.
| Please see below. |
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| 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 |
| Item # Item
Description
325:01A...Bodine Rack Motor 60cycle |
Item # Item
Description
325:39...Thermometer |
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:
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.
Manual
PDF: 194 KB / 27 pagesDTB48 Temperature Controller User Manual
PDF: 1833 KB / 13 page
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. Witch 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 |
Email us :
sales_request@jamescoxandsons.com
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