Practical Instrument Electronics, Inc. (PIE) 901 Wireless Diagnostic Milliamp Voltage & Pressure Calibrator

901 Includes Only:

• Rubber Boot
• Deluxe Hands Free Carrying Case
• USBC Charger
• 4 NiMh Rechargeable Batteries & Test Leads

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
  • Simulate 2-Wire Transmitter, Power & Read Transmitters
  • Accurate to ±(0.01% of Reading + 0.002 mA)
• Calibrate Voltage Instruments
  • Source 0.000 to 24.000 VDC
  • Read -60.000 to 60.000 VDC
  • Accurate to ± (0.02% of Reading + 0.01% Full Scale)
• Calibrate pressure instruments with optional pressure modules
  • Dual display of milliamp and pressure for calibration of I/P or P/I transducers and pressure gauges
  • Choose from a wide selection of pressure modules along with hand pumps and tubing kits
• Blue tooth functionality (for use with future PIE wireless pressure modules)
• Large Color Display with color coded menus for simplified setup
• 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

Here is a loop where a technician has just recalibrated the transmitter but the control room still sees a problem. The problem started just after a rainstorm.

Using a PIE 901 to power the loop the technician detects a leakage of 0.51 mA - the same offset seen in the control room. He walks the loop and opens a junction box releasing a stream of water. The loop is again in control. Clink on the link Video of Loop Diagnostics to see a video demonstration of Loop Diagnostics in action.

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 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 901 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.