PIE 334 Plus Loop Calibrator

PIECAL Automated 4-20mA Loop Calibrator with Current Leakage

Enhanced Replacement for Altek Model 334 & 334A; Includes Rubber Boot

All milliamp (mA) loop functions Source 0.00 to 24.00 mA (-25.0% to 125.0%) Read 0.00 to 52.00 mA (-25% to 300.0%) Simulate 2-Wire Transmitters 0.00 to 24.00 mA Power and measure 2-Wire Transmitters 0.00 to 24.00 mA Accuracy to better than 0.025% (±1⁄2 LSD) Within ± 0.005 mA from 4.00 and 20.00 mA EZ-Checks Large high contrast graphic display Viewable in all lighting conditions and angles Read voltage function Read 0.00 to ± 99.99 VDC EZ-Dial knob Easily adjust output by 0.01 mA (0.01%) EZ-Check 3-position slide switch Instantly output 4.00 OR 20.00 mA calibration values Adjustable in all three positions for easy valve testing and actuation Rugged, unbreakable with splash protection Uses 4 standard “AA” alkaline batteries Battery life up to 70 hours of normal usage Easily accessible battery compartment Overload protected 135 vrms Protection Fuse-less Protection from accidental misconnection or misuse Compact, lightweight and rugged Small in size with heavy protective rubber boot Rechargeable battery option available 1 hour rapid charger with four (4) NiMh Batteries. Kit includes an AC adaptor and a car adaptor for charging on the go.


The Practical Instrument Electronics (PIE) Model 334 is a state of the art, highly reliable, rugged and easy to use milliamp calibrator. It has the functions necessary to perform all the required maintenance and calibration tasks of virtually any 4-20mA loop. It provides source and read milliamp functions along with power and measure and two wire transmitter simulations. In addition it can measure DC Voltage for troubleshooting power supplies. If the PIE Model 334 looks familiar that’s not a coincidence. It’s because as previous employees for Altek we comprise key employees and the lead engineer that produced the original Altek Model 334 and Altek Model 334A as well as many other Altek products. We believe with this experience it has put us in a unique position to design a technologically superior but 100% functional replacement for the Altek Model 334 and Altek Model 334A. With an estimated 100,000 users of this continuously popular but aging calibrator, it is clear that loyal users as well as potential new users of this product could benefit from technology updates. As part of these updates, it is PIE’s intention to maintain the time proven familiar controls and functionality while reintroducing the product with many of today’s newest technologies. These improvements include better long term stability, accuracy, reliability and ruggedness including a significantly improved battery life. The combined improvements allow the PIE Model 334 to meet or exceed all of the expected performance and functions of the Altek Model 334 and Altek Model 334A. We guarantee this as a functional replacement with improvements. Even more important the PIE Model 334 will also exceed the performance of many higher cost calibrators and meet today’s most demanding requirements while maintaining the familiar, time proven reliability and ease of use of the original. This is the new standard!


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