Source and read T/C’s over the entire industrial temperature range with Altek’s Model 422 Thermocouple Calibrator. Use with transmitters, recorders, controllers, alarms, indicators, data acquisition and computer systems. Switch between 14 T/C types or millivolts.

High accuracy and stability is achieved through Altek’s exclusive isothermal block. Make your connections directly with thermocouple wire or with miniature thermocouple connectors.

Field customize the Model 422 to lock-in 0.1° or 1° resolution, fixed °F or °C or front panel selectable °F/°C operation. A shrouded miniature thermocouple connector receptacle plus terminal crews allow for easy hookups. Built in protection guards the Model 422 against mis-connection to 120 Volts AC or DC, in any mode.

The Model 422 turns on to the T/C type last used. Other T/C types may be selected each time the unit is turned on. If you use less than 14 T/C types, you can create your own T/C List. By following a simple setup procedure you can deselect unwanted T/C types to customize T/C types available at turn on.

Select resolution of 0.1° or 1° for the full listed range of all thermocouple types. Millivolts allows 1 microvolt resolution from -99.999 to 99.999mV. The Model 422 simulates key temperatures for repetitive calibrations. “Quik-Chek” function stores three output temperatures for each T/C type (45 total) for real convenience. Three memories are retained for each thermocouple type even when the power is off.

Turn the knob to check trip points, controller action or hysteresis. The fast response 422 sets quickly without overshoot but allows slow changes at your own rate.

The Model 422 display gives you fast, accurate temperature measurement with 0.1 and 1 degree or with 0.001 millivolt resolution. High resistance or open T/Cs and leads are detected and indicated on the LCD display. Two readings per second track fast moving temperatures.

“MAX” and “MIN” memories are continuously updated from turn-on or whenever the “RESET” pushbutton is pressed. The Model 422 gives you a handy tool to monitor temperatures for drift or control deviation. Just flip the “Quik-Chek” switch to display the minimum and maximum temperature since reset.

Each time the Model 422 is turned on, the LCD will display all segments for 1 second. It then displays the currently selected thermocouple type or mV for approximately 3 seconds. If °C/°F operation has been selected the currently selected temperature scale of °C or °F will display.