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Practical Instrument Electronics
82 East Main Street Suite 3.14 • Webster, NY 14580 Tel: 585.872.9350 • Fax: 585.872.2638 • [email protected] • www.piecal.com
Model 311
Diagnostic RTD
& Milliamp Calibrator
Operating Instructions
Copyright © 2017 All rights reserved • 311Plus-9002 - Rev A 26 July 2017
• Two Calibrators in One!
Calibrate all your RTD instruments AND your milliamp
loops with the PIE 311Plus. It has all the functions of a 12
type RTD calibrator and can source 0 to 24 milliamps or
simulate a two wire transmitter like a milliamp calibrator.
You may also perform stand alone calibrations of two wire
transmitters by simultaneously supplying the RTD input
signal while supplying the 24 volts to power up the
transmitter and monitoring the milliamp output signal.
Powers HART™ transmitters with built-in 250 ohm resistor
simplifying hookups with HART communicators.
• Troubleshoot loop problems
Quickly diagnose ground fault and current leakage with the
patented loop diagnostic technology (US Patent 7,248,058).
• Troubleshoot RTD sensors
Troubleshoot sensor connections and find broken wires
with patented technology. Connect your two, three or four
wire RTDs and the PIE 311Plus automatically detects the
connections. Secondary display shows the resistance
value corresponding to the RTD temperature.
• Easy to use in the shop, plant, or field
With the PIE 311Plus you can check & calibrate all your
RTD instruments, measure RTD Sensors, and calibrate 4
to 20 milliamp instruments. Automatic indication of
connections on the display for simple hookups. Carry it
without worry - it comes protected with a rubber boot and
rugged, low profile switches. Easy to operate even in dark
areas with the backlit display.
• Calibrate directly in temperature (°C & °F)
Stop carrying around a decade box and RTD resistance tables. The PIE 311Plus works with the
RTDs you use including Platinum 10, 50, 100, 200, 500 & 1000 (alpha = 3850), Pt 100 Ohm
(alpha=3902, 3916, 3926), Copper 10 & 50 Ohm, and Nickel 120 Ohm. Easily set any value quickly
to within 0.1° with the adjustable digital potentiometer “EZ-DIAL” plus store any three temperatures
for instant recall with the EZ-CHECK™ switch. And from 0.00 to 401.00 and 0.0 to 4010.0 Ohms.
• Checkout all your 4 to 20 mA loops & instruments
With the built-in milliamp calibrator you can check, calibrate and measure all your current signal
instruments in a 4 to 20 milliamp loop. It can be used at any access point in your loop. Source &
Read 0.000 to 24.000 mA, Simulate a 2 Wire Transmitter or use the PIE 311Plus to simultaneously
power your 2 Wire Transmitter and measure its output while simulating the sensor input
.
• Fast calibration with automatic output stepping
Choose between 2, 3, 5, 11 and 21 steps to automatically increment the output in 100%, 50%,
25%, 10% or 5% of span. Select the step time to match your system from 5, 6, 7, 8, 9, 10, 15, 20,
25, 30 and 60 seconds.
• Compatible with ALL process instruments
No competitor’s calibrator is compatible with as many process instruments! Connect directly to the
RTD inputs of smart transmitters, PLCs, DCS and multichannel recorders and verify their outputs
or displays. Works with older instruments with fixed excitation currents and newer multichannel
instruments that switch the excitation current between input channels.