Calibrate and troubleshoot all the signals in a standard 4 to 20 milliamp process control loop with Altek’s Model 434 Milliamp Calibrator. A 24 mA Source, mA meter, 2-Wire Transmitter Simulator and a DC Volt meter in one compact unit enables a single tool to perform most calibration and troubleshooting functions.

Calibrate controllers, recorders or other devices in 4 to 20 or 0 to 20 mA loops. Six “AA” batteries provide hours of continuous use. The batteries last several time longer than calibrators with a single 9V battery! Optional AC adapter for continuous use.

Check out the response of a loop by using the Model 434 in place of a 2-wire transmitter. The Model 434 modulates the current passing through the loop just like a transmitter, but with manual control.

Simultaneously supply power to a 2-wire transmitter while displaying the 4-20 mA output signal. The Model 434 supplies a nominal 24 Volts DC to the 2-wire transmitter while displaying the transmitter’s output.

Check 24 Volt loop supplies and batteries using the built-in voltmeter. Verify instruments with 1-5 Volt outputs.

Save time with every calibration by using the advanced features of the Model 434. Instantly recall any three output settings with the handy QUIK-CHEK switch. All output settings are remembered, even with the power off.

Be in two places at once by using the Model 434’s AUTO-CHEK. Connect behind the panel or replace a transmitter, then check the output in front of the panel or another remote location within the loop. Choose 2, 3, 5 or 10 output steps from 5 to 900 seconds to match your calibration setup. Use the automatic Ramp/Soak to simulate a running process and check valves for smooth operation.