Pie 334 Plus Milliamp Loop Diagnostic Calibrator

Pie 334 Plus Milliamp Loop Diagnostic Calibrator

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SKU: 334Plus Category:

Product Overview: Pie 334 Plus Milliamp Loop Diagnostic Calibrator

Pie 334 plus


Do More with the PIECAL 334Plus!


  Calibrate Milliamp Instruments

Source 0.00 to 24.00 mA & -25.0 to 125.0% of 4-20 mA

Read 0.00 to 52.00 mA

Read -99.99 to 99.99 V

Simulate 2-Wire Transmitter, Power & Read Transmitters

Menu Selectable 250 Ohm resistor for HART compatibility 

  Calibrate with Accuracy

Accurate to ±(0.02% of Reading + 0.002 mA) 

  Easty-to-Read Backlit Display 

  Locate Loop Current Leakages

Automatic indication of Loop Current and Leakage Current. Measure ground current leakage from faulty wiring, flooded conduit and corrosion bridges. Leakage typically appears as a Zero Shift and helps you decide if the transmitter needs calibration or if there is a problem in the loop wiring. 

  Faster Calibrations

Three output EZ-CHECK switch

2 speed EZ-DIAL

Stepping & Ramping 

  Includes Rubber Boot & Test Leads 

  Optional Accessories

AC Adaptor 120 V (020-0101); 240 V (020-0100)

NiMh Batteries & Charger 120 VAC/12V DC (020-0103) 


Ground Leak Detection

Have you ever replace a ‘faulty’ transmitter only to find the problem was somewhere else in the loop? And did you end up throwing the transmitter away after you fixed the other problem ‘just in case’ the transmitter was faulty?


If you find a loop where the transmitter is calibrated correctly but all the readings elsewhere in the loop have a fixed offset, this is due to Zero Shift. This zero shift is typically caused by some current in the loop bypassing the transmitter. This might be caused by ground faults, moisture or corrosion.


If you have some loops that are erratic after it rains, there may be moisture present in a junction box where insulation has broken down. Turn on Ground Leak Detection and use the PIECAL 334Plus to power up the loop. Any current that isn’t controlled by the transmitter or other current control element will be indicated as leakage on the PIECAL 334Plus display.


The PIECAL 334Plus powers up the 2-Wire transmitter or loop and indicates the total current and the uncontrolled current. This provides information useful in troubleshooting loop errors. 









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