Rolling Thin Film Oven
(RTFO)
Model  CS 325-B
AASHTO Designation T240
ASTM Designation D2872

SPECIFICATION	PARTS LIST	TECH SUPPORT
MANUAL	F.A.Q.	TROUBLESHOOTING
DTB48 Temperature Controller User Manual	ORDER FORM

 

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.

 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.

 

 

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The CS325-B Rolling Thin Film Oven is double walled and designed to conform exactly to the AASHTO and ASTM  specifications. Please see below.

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

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

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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. 

Note:
In case of apparent malfunction, please check the following points first.