Practi-Cal®

Industrial Temperature Calibrator

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The perfect calibrator for Surface, Infrared and immersion calibrations.

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The EDL Practi-Cal® industrial temperature calibrator is your solution to temperature calibration in a manufacturing environment. Functionality, features, and reasonable cost make the Practi-Cal® the obvious choice in temperature calibrators.

There are three main areas of concern in temperature calibration. These are Surface, Infrared, and Immersion; the Practi-Cal® provides a calibration source for all three. Contained within one source we have provided; one and one half square inches of surface area for surface calibration, a two and one half inch diameter black body source for non-contact infrared calibration and three standard sized probe wells for Immersion testing.

In industry much consideration is given to accuracy and stability during process measurements and calibration, this is why we have provided front panel connections to independent thermocouple references for each area of the calibrator. This "remote reference" feature allows the user to greatly improve their overall uncertainty by utilizing an external reference that is measuring the specific area of the calibration block being used. Another major contributing factor for non-contact measurements is the spot size of the surface being measured. Most infrared calibrators do not address this problem; however, the Practi-Cal® is available with an optional iris. The iris is mounted in front of the black body source to provide an adjustable aperture. To utilize this feature you simply position your infrared device at a fixed distance and location centered on the black body and then you the close the aperture until a one percent drop in reading is achieved. You then measure the diameter of the iris opening and you now know the exact spot size at that distance.

Practi-Cal® is the only calibrator that has its calibration block ungrounded and isolated form the heating source so you can safely and confidently calibrate grounded as well as ungrounded sensors. In addition, this keeps you from seeing unnecessary AC ripple in your readings, while eliminating potential ground loops.

A view of three Practi-Cals® waiting for final calibration and shipping.

Because industrial processors are dependent on their calibration source, we have chosen to use generic components for nearly every electrical component used in this calibrator. Off the shelf relays and controllers may be purchased from EDL or through your local industrial goods supplier. With the purchase of the Practi-Cal® you receive a complete set of electrical diagrams so that your in-house technicians can perform preventative maintenance as well as repairs, thus eliminating long delays caused by shipping and ordering processes.

The unique Practi-Cal® design allows a great deal of flexibility in its application and use. In addition, all of the parts used in this unit are manufactured at our facility. The complete design and fabrication is done in-house, so if you have a special requirement please contact our sales department. Examples of special requirements might be different temperature ranges, custom well sizes, curved surfaces, or any other type of unusual temperature calibration requirement.

Our engineering and laboratory staff provides technical support for the Practi-Cal®. We have an extensive calibration laboratory that will perform the necessary calibrations for all of your temperature measuring equipment.

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Graph of ramp up from +30°C to +100°C

Graph of ramp up from +30°C to 300°C

Graph of cool down from +300°C to +100°C

Graph of Practi-Cal® stability at +100°C

Graph of Practi-Cal® stability at +300°C

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Physical

• Dimensions . . . . . . . . . . . . . . . . . . . . . . . . .12.5" High x 7" diameter
• Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 lbs
• Surface . . . . . . . . . . . . . . . . . . . . . . . . . . . .Epoxy Powder Coat
• Material . . . . . . . . . . . . . . . . . . . . . . . . . . . .Aluminum, Stainless Steel, Brass, and 4140 Steel
• Well Sizes . . . . . . . . . . . . . . . . . . . . . . . . . .0.125", 0.187", and 0.250" diameter
• Usable Surface Area . . . . . . . . . . . . . . . . . . .~ 1.5 In. DIA.
• Infrared area . . . . . . . . . . . . . . . . . . . . . . . . .2.5" Diameter - 4.9 Square Inches
  Note: Practi-cal® is also available with an interchangeable well design for different diameters and insertion depths.

Electrical

• 110 VAC . . . . . . . . . . . . . . . . . . . . . . . . . . .~7 Amp, 60HZ
• Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . 110 VAC, 800 Watts grounded
• Main Fuse . . . . . . . . . . . . . . . . . . . . . . . . . 10 Amp
• Controller Fuse . . . . . . . . . . . . . . . . . . . . . . 0.5 Amp
• Power Relay . . . . . . . . . . . . . . . . . . . . . . . . 25 Amp (overrated for extended service)
• Safety Relay . . . . . . . . . . . . . . . . . . . . . . . .10 Amp
• Wells . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fully Isolated and ungrounded

Accuracy Specifications

• Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ambient to 315°C (Ambient to 600°F)
• Resolution . . . . . . . . . . . . . . . . . . . . . . . . . 0.1°C
• Stability . . . . . . . . . . . . . . . . . . . . . . . . . . .better than +/- 0.2°C (over 20 min. period)
• Uniformity . . . . . . . . . . . . . . . . . . . . . . . . . better than +/- 0.5°C

(Note:  Absolute accuracy will be improved by using remote reference.)

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Item:		Price:
PRI-1 Industrial Temperature Calibrator		$3,200
Options:	Option Code:	Price:
Adjustable Aperture	A	$415.00
220 VAC Power	2	$275.00
Ogden Smart Logic Controller	C	N/C
Calibration of Device		$250.00