PIE 434 Automated Diagnostic 4-20 mA Calibrator

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 -99.99 to 99.99 V
  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)
  PIECAL 434 is more accurate than similar calibrators - within ±0.004 mA at 20 mA output!
• 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)

Advantages of the PIECAL 434 over the Altek 434

• Larger Display withBacklight
  Easy viewing in dark locations
• Easy selection of 250 Ω Hart Compatible Resistor
  No disassembly to move internal jumper
• Detects Loop Current Leakages
  Measure ground current leakage from faulty wiring, flooded conduit and corrosion bridges. Leakage appears as a Zero Shift and helps you decide if the transmitter needs calibration or if there is some problem in the loop wiring.
• More Resistant to Accidental Damage
  Rubber Boot and Stronger Switches
• Less Expensive Battery Changes
  Four versus six "AA" batteries

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 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 PIECAL 434 display.

The PIECAL 434 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.