Practical Instrument Electronics, 434, milliAmp Loop Diagnostic Calibrator with NIST Certificate
Features:
- Calibrate Milliamp Instruments
- Source 0.000 to 24.000 mA & -25.00 to 125.00% of 4-20 mA
- Read 0.000 to 24.000 mA & -25.00 to 125.00% of 4-20 mA
- Read -60.00 to +60.00 VDC
- Simulate 2-Wire Transmitter, Power & Read Transmitters
- Menu Selectable 250 Ohm resistor for HART compatibility
- Calibrate with Lab Accuracy
- Accurate to ±(0.01% of Reading + 0.002 mA)
- PIE 434 is more accurate than similar calibrators – within ±0.004 mA at 20 mA output!
- Easy-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
Find Hidden Loop Problems with Ground Leak DetectionIf 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 a 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.
Turn on Ground Leak Detection and use the PIE 434 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 calibrator's display.
For more information, please see 
Data Sheet
