ALTEK SERIES 22 Thermocouple Sources provide 22 precise temperatures for inputs to transmitters, recorders, controllers, alarms, data acquisition and computer systems. Model 22 provides thermocouple wire output and is cold-junction compensated for ambient temperature variations. Conformity to the particular thermocouple vs millivolt curve is in accordance with the latest ASTM and IPTS standards for exact temperature simulation. Linear millivolt models are also available.
Thermocouple types B, E, J, K, R, S and T are available in both degrees F and C. The table lists the standard ranges. Resolution is 25, 50 or 100 degrees, corresponding to full scale output of 500, 1000, 1700, 2100 and 3100 degrees respectively.
Dual ranges, with an individual “ON” position for each range, allow quick, easy settings for any output. Calibrated accuracy is ±0.1% of span ±1 degree. Negative temperatures add ±2 degrees.
Two built-in AA cells provide power for one year of everyday use. A front panel LED pulses every time the Model 22 is turned on to indicate proper battery voltage.
The low cost ALTEK MODEL 22 is a complete, compact source for checkout and calibration of all thermocouple instruments in the field, shop or control room.
OPERATING INSTRUCTIONS
Select the ALTEK MODEL 22 for the correct thermocouple type, the desired temperature scale (F or C), and range.
Connect the ALTEK Thermocouple Source to the input terminals of the instrument to be tested, the field mounted head or junction box terminals.
Cold-junction compensation and instantaneous automatic standardization is built into the Model 22.
Set the temperature selection switch to the desired temperature and slide the “ON” switch to the selected scale. The Battery Check LED will pulse once indicating proper battery voltage. If no pulse is seen, the batteries should be replaced with 2 “AA” cells. Alkaline cells are preferred for longest life and widest operating temperature range.
End point calibration temperatures of the instrument are then selected on the Model 22 and any required adjustments are made. Intermediate points may then be selected to verify instrument linearity or check critical points.