PIE 235 Process Voltage Calibrator

Overview

The PIE 235 is a portable, battery-powered process calibrator designed for field technicians to source and measure voltage signals in process instrumentation. It provides comprehensive voltage range coverage from millivolts to sixty volts, and includes unique capabilities for pH probe simulation and 4-20 mA loop calibration without circuit disconnection. The adjustable dial and pre-programmable output settings enable quick, repeatable calibration of transmitters, monitors, and analyzers.

Key Features

• Source voltage ranges: -500 to +999 mV, 1.000 to 5.000 V, -25 to +125% of 1-5 V, and 0 to 20.000 V (extendable to 24 V)
• Measure voltage ranges: -500 to +999 mV, 0 to 5.100 V, -25 to 125% of 1-5 V, 0 to 20.000 V, and 0 to 60.000 V DC
• pH probe simulator for verifying transmitter operation before field deployment
• Non-invasive 4-20 mA loop calibration by clipping leads across voltage input without breaking circuit
• Power outputs for loops with loads over 1,000 Ohms
• Three programmable output settings for fast recall of frequent test values
• Automatic stepping in 10%, 25%, 50%, and 100% increments, plus continuous ramp function
• Adjustable step/ramp timing from 5 to 60 seconds
• Large backlit display for visibility in dark work environments
• Rubber boot protection and low-profile switches to resist accidental damage
• Separate battery compartment with simple tool-free battery changes

Applications

• Field calibration of voltage and millivolt inputs in process transmitters
• pH analyzer and transmitter verification before probe installation
• Loop-powered device calibration in live 4-20 mA circuits
• Plant, field, and service shop instrument maintenance
• Recorder and monitor signal verification