Simultaneously source and read any combination of process milliamp and voltage signals. Altek's Model 934 combines all the functionality of a milliamp and a voltage calibrator! This dual function calibrator continuously displays the output and input signals. The top half of the display indicates the output setting while the lower half of the display shows the signal being measured.

Calibrate state of the art equipment such as smart transmitters and indicators to 41/2 or more digits using the Model 934. Full 5 digit resolution lets you check any brand of process control equipment. Your calibrations are correct with accuracy surpassing 0.02% of reading.

Use the scaleable display to match the readings on the Model 934 to that of the equipment being calibrated. For example, if your 4 to 20 mA recorder scale is 0.0 to 300.0 gallons/hour you can set the 934 to display 0.0 for 4 mA and 300.0 for 20 mA. No more need to use your calculator or "cheat sheet" to come up with the correct milliamp values.

Six "AA" alkaline batteries provide more than 20 hours sourcing 20 mA continuously . . . more than 3 months of typical use. From the time the low battery indicator first comes on you have hours of power remaining to get you through a shift without interruption. The 934 comes configured to automatically power down after 30 minutes of inactivity to save battery life.

Calibrate loop converters and isolators by simultaneously providing the input signal and measuring the output of the converter or isolator. Internal optoisolators withstand up to 500 VDC between the source and read leads. Calibrate and checkout all your process milliamp and voltage instruments with the "benchtop accurate" Model 934.

Use at any point in your 4 to 20 milliamp loop. Source milliamps directly into your receivers with loop loads up to 1200 Ohms. Simulate 2-Wire Transmitters for checkout of field wiring and total loop testing. Power and measure 2-Wire or 4-Wire transmitters on the bench before installation. Read Transmitter & Controller outputs up to 52.00 mA. Display directly in milliamps, percent of 4 to 20 mA, percent of DP Flow or engineering units to match the scale of your process.

Calibrate and checkout all your DC Voltage instrumentation. Source up to 999.90 millivolts to simulate sensors and up to 20.000 Volts to check your process signal inputs. Measure voltages from -99.990 to +99.990 VDC to check your power supplies and the outputs from any process voltage equipment. Calibrate any 1 to 5 Volt device in a live 4 to 20 milliamp loop without disconnecting any wires. The Model 934 will automatically source or sink 0 to >16 milliamps to clamp the test voltage in all source ranges. Output impedance is less than 0.2 Ohm to let you calibrate voltage instruments in milliamp loops without removing the input load resistors.