The Altek Model 334A will check, calibrate and measure all your current signal instruments in a 4 to 20 milliamp DC loop. Use at every point in your loop. Source & Read 0.00 to 24.00 mA, Simulate a 2-wire transmitter or use the Model 334A to simultaneously power & measure your 2-wire transmitters. Toggle the display to show milliamps or percent of 4 to 20.

SOURCE MILLIAMPS
Calibrate recorders, digital indicators, stroke valves or any other instruments that get their input from a 4 to 20 mA loop. Easily set any value to within 0.01 mA with the speed sensitive digital potentiometer.

RECALL OUTPUT SETTINGS
The “QUIK-CHEK” switch provides rapid checking of 4.00, 20.00 and a third point between 0.00 to 24.00 mA.

CALIBRATE USING LOOP POWER
Check loop wiring and receivers by using the Model 334A in place of a 2-Wire transmitter. Simulate a changing process input to check loop response and control settings. The Model 334A uses any loop power from 3 to 45V DC.

READ LOOP CURRENT
Check controller outputs or measure the milliamp signal anywhere in the loop. The Model 334A measures 0.00 to 24.00 mA signals with much greater accuracy than a typical multimeter. Toggle the display to show milliamps or percent of 4 to 20.

POWER & MEASURE 2-WIRE TRANSMITTERS
Simultaneously measure the output of a 2-Wire Transmitter while using the internal batteries to supply up to 27V DC to power the transmitter. Handy for checking transmitters in the field or on the bench.

READ DC VOLTS
Measure from -99.99 to +99.99 VDC with 10mV resolution. Use it to check loop power supplies, I/V converters, 1 to 5 Volt signals and battery voltages.