Altek Model 334a Loop Calibrator

US $299.99

United States
Mar 27th

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This item is used. The unit is in good shape with signs of light wear and tear. Item turns on. No dead spots in screen. General Description Altek’s Model 334 Loop Calibrator has been designed to check, calibrate and trouble shoot all the signals present within a standard 4 to 20 milliamp process control loop. A 24 mA Source, mA meter, 2-Wire Transmitter Simulator and a DC Volt meter are combined into one easy-to-operate instrument. Dual current ranges allow display of each current function in percent of 4 to 20mA signal, as well as directly in milliamps. In SOURCE MODE, percent range displays -25.0% to +125.0% with 0.1% resolution while the milliamp range displays from 0.00 to 24.00 mA with 10µA resolution. In READ MODE the milliamp range displays from 0.00mA to 52.00mA, or percent. SOURCE MODE uses built in batteries to provide 0.00 to 24.00 mA into any load from 0 to 1200 Ohms. Three 9 volt alkaline batteries provide over 30 hours of continuous 12 mA output . . . more than 3 months of typical use. An optional AC adaptor plugs in for continuous bench use. True current source maintains set output independent of load, “QUIK-CHEK” switch provides instant zero (4.00mA) and full scale (20.00mA) in both SOURCE and 2 WIRE modes. Output in the PERCENT range displays 0.0% and 100.0% for”QUlK-CHEK” settings. ADJUST position selects a continuously adjustable 10 turn potentiometer to allow fast, easy setting to any exact value from 0.00 to 24.00mA. No range change at critical 20.00mA eliminates hysteresis error. POWER & MEASURE 2-Wire Transmitters simultaneously in Source Mode. The Model 334 supplies the required voltage and displays the current as regulated by the 2-Wire Transmitter. The Model 334 may also be used when a controller is temporarily removed for repair or replacement. Simply substitute the Model 334 for the controller and use it as a manual loading station. SIMULATE 2-WIRE TRANSMITTERS by modulating external power to pass 4 to 20mA. The Altek Model 334 uses any loop power from 2 to 100 Volts DC. True current design maintains set current independent of voltage or load changes. READ MILLIAMPS OR PERCENT of the 4 to 20mA signal. Maximum read current is limited to (nominally) 55mA to minimize the possibility of damaging the device to be calibrated. MEASURE DC Volts range displays from-99.99 to +99.99 VDC with 10mV resolution. Built in voltmeter is used to check loop power supplies, I/V converters, 1 to 5 Volt signals and battery voltages. The Model 334 is protected in all ranges to 135 Volts AC or DC. Special protective circuitry withstands accidental misconnection in any mode without fuses. Display digits are 0.4" (10.2 mm) high for readability from across the room. Non-glare Liquid Crystal Display is readable in any light. . . even in direct sunlight. The digital measuring circuit is independent of the current adjustment and measures the actual input or output. Benchtop accuracy in a toolbox calibrator assures fast, precise setting of current trips, recorders, controllers, loggers, computers and final control elements. Altek brings you the handy Model 334 Loop Calibrator at a cost low enough for every bench and toolbox.

Condition:	Used: An item that has been used previously. The item may have some signs of cosmetic wear, but is fully operational and functions as intended. This item may be a floor model or store return that has been used. See the seller’s listing for full details and description of any imperfections. ...	Brand	Altek
Model	334A