Model 512 operating instructions, Read mode, Source mode – Practical Instrument Electronics 512 User Manual
Page 2: Connection diagrams
Model 512 Operating Instructions
Read Mode
Slide the SIMULATE/OFF/READ switch to READ for direct RTD input. The Model 512 displays temperature corresponding to resistance
input for the selected thermocouple type.
Automatic 2, 3, or 4 wire detect: Connect 2, 3, or 4 wires to the RTD sensor. Follow the connection diagrams. The Model 512
indicates “2W”, “3W”, or “4W” in the lower left corner of the display. Use this feature for troubleshooting broken leads or sensors.
Slide the EZ-Check™ Switch to HI and LO to recall maximum and minimum saved readings. Press and hold the EZ-Dial™ Knob to
clear saved readings. The display flashes “CLEARED” as a confirmation.
Be sure the switch is in the DIAL position to monitor input. Observe the “HI” and “LO” switch position indicators in the display.
Double-click the EZ-Dial™ Knob to return to the configuration menu.
Turning the EZ-Dial™ Knob has no effect in read mode.
Display Indications:
OVERRANGE or UNDERRANGE
The resistance input exceeds the range of the selected RTD type.
OPEN RTD
No RTD is connected.
MISCONNECT
The Model 512 is incorrectly connected for a 3-wire reading. Both black leads are required.
Source Mode
Slide the SIMULATE/OFF/READ switch to SIMULATE for direct RTD output. The Model 512 outputs resistance corresponding to
temperature for the selected thermocouple type.
Turn the EZ-Dial™ Knob to change temperature, push and turn for faster dialing.
Slide the EZ-Check™ Switch to HI or LO to recall stored settings. While in the HI or LO position, dial a new setting and press the EZ-
Dial™ Knob to store. The DIAL position always holds the last setting dialed there.
Double-click the EZ-Dial™ Knob to return to the configuration menu.
Connection Diagrams
Two Wire Connection to Transmitter
Three Wire Connection to Transmitter
841 Holt Road #1 • Webster, NY 14580
Tel: 585-872-9350 • Fax: 585-872-2638
[email protected] • http://www.piecal.com/
Practical Instrument Electronics, Inc. Copyright 2003. All rights reserved.
512-9002 2/25/04
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