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The CTC-320A and the CTC-650A contain an innovative heating block profile.This design heats up the CTC-320A to maximum temperature in just 4 minutes and the CTC-650A in only 10 minutes. The fast performance of the heating block is due to the special profile that minimizes mass and yet, still accepts an insertion tube with a 25 mm / 1 in. outer diameter. This design is a balanced compromise between temperature stability/homogeneity and rapid heating / cooling. The CTC-320 and the CTC-650B have the same features but are designed with a extra deep 7.5" well for longer sensors calibrations. Six models- The JOFRA CTC series consists of six different models which differ in temperature range and immersion depth. All units offer similar features and the large, backlit LCD display panel, which is easy-to-read even in well-lit areas. A rugged, slim-line, aluminum outer casing with die-cast top and bottom protects the CTC series of dry-blocks. Stability indicator - Clear audio and visual indication in the display when the calibrator is stable. Easy-to-use - Intuitive operation -All instrument controls may be performed from the front panel. The heat source is positioned away from the panel. This design helps to protect the operator. The main functions on the CTC series are designed with one-key-one-function logic. This means that there are no sub-menus or difficult to remember multiple keystrokes necessary to access primary functions. The easy-to-read, backlit display features dedicated icons, which help in identifying instrument conditions and operational steps. Set temperature -The Up and Down arrow keys allow the user to set the exact temperature desired with a resolution of 0.1 C or F. Instrument setups -The CTC series stores the complete instrument setup, including: engineering units, stability criteria, resolution, display contrast, slope (ramp) rate, auto step settings, and maximum temperature. Automatic switch test -Operators can save a lot of time using the automatic thermoswitch test function to find values for the Open and Close temperatures. Additionally, this feature displays the hysteresis (deadband) between the two points. The feature ensures a very high repeatability when testing thermo-switches. Simply press the SWITCH TEST key to activate the function. Auto-stepping -This feature saves manpower. The operator may stay in the control room, or another remote location, monitoring the output from the sensor-under-test while the CTC series calibrator is placed in the process and automatically changes the temperature using a programmed step value and rate. Up to 9 different temperature steps may be programmed, including the hold time for each step. This feature is also ideal for burning-in new sensors prior to installation: This minimizes initial drift and allows for initial testing. It is also useful for testing temperature data loggers. Re-calibration/adjustments -The CTC series has a very easy and straight forward procedure for re-calibration/adjustment. There is no need fora screwdriver or PC software. The only thing you need is a reliable reference thermometer. Place this reference probe in the calibrator and follow the instructions on the display.
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