Altek’s Model 211 RTD Calibrator lets you simulate and read RTDs over the entire industrial temperature range. Use with transmitters, single & dual channel recorders, controllers, alarms and indicators. Switch between four Pt 100, one Pt 1000, one Cu 10, two Ni RTD curves or ohms ranges from 0.00 to 410.00 and 0.0 to 2010.0.
Field customize the Model 211 to lock-in 1° resolution, fixed ° C or ° F or front selectable ° F/° C operation. Read and simulate 2-wire and automatically compensate for 3-wire RTDs with built-in leads. A plug-in lead is supplied for 4-wire RTD measurements. RTD types may be selected each time the unit is turned on. If you always use one RTD curve, lock-in the selected RTD type with the internal DIP switch to prevent accidental change to an unwanted RTD type.
Resolution is 0.1° C or F simulating the full range of Pt 100 ohm RTDs into devices supplying a continuous excitation current of 0.09 to 1.1 mA. From 1.1 to 5.800 mA continuous excitation current the 111 resolution automatically adjusts to 1° C or F. Ohms range provides 0.01 ohm resolution from 0.00 to 410.00 ohms which automactically switches to 0.1 ohm resolution for continuous excitation currents above 1.1 mA.
“QUIK-CHEK” function stores three output temperatures for real convenience. The Model 211 simulates key temperatures for repetitive calibrations. Turn the knob to check trip points, controller action or hysteresis. The fast response 211 sets quickly without overshoot. Memory is retained even when power is off.
The Model 211 display gives you fast, accurate temperature measurement with 0.1 and 1 degree or with 0.01 and 0.1 ohm resolution. Two, three and four wire hookups assure accuracy in short or long cable runs. Open RTDs 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” button is pressed. Model 211 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 measured since reset.
For multichannel recorders, data acquisition, computer systems and smart transmitters Altek recommends using the Model 311A RTD Calibrator in place of the 211. The Model 311A is designed to operate with many devices that use pulsed or intermittent excitation currents to read an RTD.