PIECAL 334Plus Automated mA Loop Calibrator

Like the PIECAL 334, the 334Plus calibrates signal instruments in a 4 to 20 milliamp DC loop. It can be used at any access point in the loop, and can simultaneously power your two-wire transmitter and measure its output thanks to its internal batteries and internal switching power supply.

The 334Plus features ground current leak detection which locates faulty wiring, flooded conduit, and corrosion bridges for troubleshooting. When powering up your loop, the 334Plus will indicate leakage by pinpointing any current that isn't controlled by the transmitter or other current control element. The PIECAL 334Plus is comparable to Altek's 334 and 334A models.

Key Specifications

  • Source and read from 0 to 24 mA
  • Works with all your current signal instruments in a 4-20 mA DC loop
  • Simulates two-wire transmitter
  • Simultaneously power your two-wire transmitter and measure its output
  • Can measure from -99.99 to 99.99 VDC with 0.01 Volt resolution
  • Features preset 4 mA (0%) and 20 mA (100%)  EZ-CHECK™ settings, or use the adjustable digital potentiometer DIAL to save any value within 0.01 mA
  • Replacement for PIE Calibrators' retired PIE 134 mA loop calibrator model

Specifications, Manuals, and Supporting Literature

Click the file icon to view the file online, or right-click on the file icon and select "Save Target As..." to download the file to your computer for later viewing.
Tip: If you want to print a large file, download it to your PC first.


Subscribe to the Lesman Instrument Company YouTube channel.Lesman Instrument Company on YouTube

Video is a great way to learn about instruments and technology, and it's available whenever you need it. Watch step-by-step instructions on how to configure a transmitter, tune a controller, or troubleshoot a safety valve. We'll post videos we create, and those our manufacturer partners share with us, so you don't have to look in multiple places to find the video training you need.

Subscribe to Lesman's YouTube channel, and you'll get email notifications as soon as we add new training videos and webinars.