The Model 311A has been designed to calibrate every type of RTD monitoring and measuring device. The enhanced circuitry of the 311A makes it compatible with a wider variety of instruments than other RTD calibrators.

Some newer process control equipment use a pulsed excitation current to measure RTD sensors. This includes some smart transmitters, multi-channel recorders and inputs to programmable logic controllers (PLCs), computers and digital control systems.

The Model 311A is designed to work with these devices and accepts intermittent current pulses as short as 10 milliseconds. It calibrates devices with excitation currents of as little as 0.090 mA and as high as 10.20 mA

Altek?s Model 311A RTD Calibrator lets you SIMULATE and READ RTDs over the entire industrial temperature range. Switch between four platinum 100 ranges and two ranges each for copper and nickel.

Simulate RTD resistances into all types of measuring instruments. The Altek Model 311A takes the place of bulky, expensive decade boxes and temperature tables. Output directly in ?C, ?F* or dial in the resistance value in ohms.

Save time with every calibration by instantly recalling three output settings for each RTD type with the handy Quik-Chek switch. All output settings are remembered, even with the power off.

The Model 311A display gives you fast, accurate temperature measurement with 0.1? and 1? or resistance measurement to 500.00 ohms with 0.01 ohm resolution. Two, three and four wire hookups assure accuracy in 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 311A 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.