Instruction Manual

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Practical Instrument Electronics

Model 512

RTD Calibrator

Operating Instructions

Basic Keypad Operations

1 EZ-Check™ Switch

Slide the switch to select from three user stored values for the desired

calibration points. The user can select HI, DIAL, and LO positions.

These values can easily be changed to suit the calibration

requirements.

2 SIMULATE/OFF/READ Switch

Turn the Model 512 on to SIMULATE to output a

resistance corresponding to temperature. Turn

the unit to READ to read RTD resistance directly

in temperature.

3 EZ-Dial™ Knob

Turn the knob to change temperature in 0.1º

increments. Push and turn for faster dialing.

Push without turning to store new EZ-Check™

HI/LO points in SIMULATE mode, or to clear EZ-

Check™ HI/LO points in READ mode.

Model 512 Configuration

Instructions for Enabling and Disabling the Configuration Options

1. Turn the Model 512 on to SIMULATE or READ.

2. Press the EZ-Dial Knob while the “PRESS EZ-DIAL KNOB FOR CONFIGURATION”

message is displayed.

3. Select options by turning the EZ-Dial Knob until the arrow points to the desired

option.

4. The option can be enabled or disabled by tapping the EZ-Dial Knob.

The Model 512 configuration menu will exit automatically after 5 seconds of inactivity and go

to normal operation with the options selected. These options are recalled at turn on until they

are changed again.

Model 512 Configuration Menu

Auto Off ON/OFF

If Auto Off is ON, the unit will turn off after 30 minutes to save battery life, if there is no user activity. If Auto Off is OFF the unit will

stay on until it is turned off from the keypad. This is typically useful for manual loading or continuous use.

Display Units °C/°F

Pressing the EZ-Dial Knob to toggles between °C or °F

RTD Pt100 α=3850, Pt100 α=3902, Pt100 α=3916, Pt100 α=3926,

Cu10 α=427, Ni110 Bristol, Ni120 α=672, Ω

To change RTD type, press the EZ-Dial™ Knob. Turn the EZ-Dial™ Knob to scroll through the list of available types. Press again to

save and return to the configuration menu.

841 Holt Road #1 • Webster, NY 14580 Tel: 585-872-9350 • Fax: 585-872-2638 sales@piecal.com • http://www.piecal.com/

512-9002 2/25/04 1-4

Summary of content (4 pages)

PAGE 1
Model 512 RTD Calibrator Operating Instructions Practical Instrument Electronics Basic Keypad Operations 1 EZ-Check™ Switch 2 SIMULATE/OFF/READ Switch Slide the switch to select from three user stored values for the desired calibration points. The user can select HI, DIAL, and LO positions. These values can easily be changed to suit the calibration requirements. Turn the Model 512 on to SIMULATE to output a resistance corresponding to temperature.
PAGE 2
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.
PAGE 3
Model 512 Operating Instructions Connection Diagrams Four Wire Connection to Transmitter Specifications General Specifications: (Unless otherwise indicated all specifications are rated from a nominal 23 °C, 70 % RH for 1 year from calibration) Temperature Range -25 to 60 °C (-10 to 140 °F) Relative Humidity Range 10 % ≤RH ≤90 % (0 to 35 °C), Non-condensing 10 % ≤RH≤ 70 % (35 to 60 °C), Non-condensing Size 4.9 X 3.15 X 1.82 inches (125.5 X 80 X 46.2 mm) Weight 9.
PAGE 4
Model 512 Operating Instructions Temperature Accuracy The following charts give worst-case temperature accuracy based on stated resistance accuracy of ±(0.015 % + 0.05) Ω. Pt100 TCR=0.00385 -200 to 850 °C 0.4 Error °C Error °C 0.4 0.3 0.2 0.1 -200 0 200 400 Pt100 TCR=0.003902 -200 to 850 °C 600 0.3 0.2 0.1 -200 800 0 200 Temperature °C Pt100 TCR=0.003916 -200 to 850 °C 800 0.4 0.3 0.2 0.1 -200 600 Pt100 TCR=0.003926 -200 to 850 °C Error °C Error °C 0.