Model 512S
RTD Calibrator
Practical Instrument Electronics
Simulate/Read RTD sensors
Calibrate/Read directly in temperature for your RTD curve
Adjustable output for full temperature range
Several Manufacturers’ RTD Curves Available
Platinum, Copper & Nickel
Accurate to ±0.25°C (±0.45°F) with 0.1° Resolution
Resistance accuracy of ±(0.015 % + 0.05) Ω
Auto Stepping
Selectable Step size and step times
Guaranteed to Work with All Pulsed Instruments
Works with a wide variety of transmitters including popular
Rosemount and Honeywell Models
Compatible with devices using pulsed excitation currents
including PLCs, DCS, Recorders, and all others
Automatic Detection of 2, 3, or 4 Wire Connections
No buttons or switches required, 2W, 3W, or 4W indicator is
automatic
A valuable troubleshooting tool
EZ-Dial Knob
Easily adjust output by 0.1°
Pressing down and turning will select a faster dialing speed
EZ-Check Switch
User settable EZ-Check for 0% and 100% span adjustments
Store new EZ-Check values by pressing the EZ-Dial Knob
Uses a standard 9V Alkaline Battery
Superior battery life of 45 hours under typical continuous
usage
Easy access to battery compartment
Lightweight, Rugged and Reliable
Small, tough and protected to 60V
With Auto Stepping
Datasheet
Features
Practical Instrument Electronics, Inc. Copyright 2004. All rights reserved.
512S-9001 2/28/05
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Model 512S Datasheet
Description
The Practical Instrument Electronics Model 512S RTD Calibrator provides direct temperature calibration to all types of instruments
such as transmitters, recorders, controllers, alarms, data acquisition, and computer systems. Also, the Model 512S reads RTD
outputs and displays in temperature. It is compatible with pulsed systems and transmitters (like the Rosemount 3144.) 2, 3, or 4
wire connections are detected automatically. The Model 512S is a superior replacement for decade boxes, eliminating the need for
lugging around large equipment and the possibility of misreading RTD tables.
Select from 8 RTD types to source/read in °C or °F with 0.1 ° resolution. Or, select Ω for direct resistance source/read capability.
Use the EZ-Check Switch to quickly switch between three stored temperature / Ω outputs. The Auto step mode allows the end user
to select the high, mid and low test points along with step size and time. In read mode, the EZ-Check Switch recalls minimum and
maximum readings. Store/Clear memory with a press of the EZ-Dial Knob.
The Practical Instrument Electronics Model 512S offers the highest performance and functions in its class by exceeding the accuracy
and functions of many higher priced RTD calibrators. It is a low cost solution for checkout and calibration of all RTD instruments in
the field, shop or control room. Contact Practical Instruments Electronics for custom RTD curves, ranges, or special requirements not
provided by the Model 512S.
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
Size 4.9 X 3.15 X 1.82 inches (125.5 X 80 X 46.2 mm)
Weight 9.1 oz (258 grams)
Battery 9V Alkaline provides 45 hours of continuous use
Miscellaneous
Resolution °C or °F / 0.01 Ω
Span 0.00-400.00 Ω
Accuracy ±(0.015 % of Ω + 0.05) Ω (see accuracy tables for temperature error)
Temperature Coefficient
RTD Simulation Specifications:
Allowable Excitation Current
for accuracies below 100µA add
Pulsed Excitation Current Compatibility DC to 0.01 second pulse widths
RTD Read Specifications:
Excitation Current 1 mA nominal
10 % ≤RH ≤90 % (0 to 35 °C), Non-condensing
10 % ≤RH≤ 70 % (35 to 60 °C), Non-condensing
Low battery indication with nominal 1 hour of operation left
Protection to 60V for up to 30 seconds in duration
High contrast graphic liquid crystal display with 0.357” (9.07 mm) high digits
±0.01 % of span in Ω/°C ambient
100 µA to 10.2 mA, steady or pulsed/intermittent/smart
±10µV/Excitation Current (units are in Ω)
Practical Instrument Electronics, Inc. Copyright 2004. All rights reserved.
512S-9001 2/28/05
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Model 512S Datasheet
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
0.3
0.2
Error °C
0.1
-200 0 200 400 600 800
Temperature °C
Pt100 TCR=0.003916
-200 to 850 °C
0.4
0.3
0.2
Error °C
0.1
-200 0 200 400 600 800
Temperature °C
Cu10 TCR=0.00427
-200 to 260 °C
1.4
1.35
1.3
Error °C
1.25
1.2
-200 -100 0 100 200 300
Temperature °C
Pt100 TCR=0.003902
0.4
0.3
0.2
Error °C
0.1
-200 0 200 400 600 800
-200 to 850 °C
Temperat ure °C
Pt100 TCR=0.003926
-200 to 850 °C
0.4
0.3
0.2
Error °C
0.1
-200 0 200 400 600 800
Tempe rature °C
Cu50 TCR=0.00428
0.5
0.4
0.3
0.2
Error °C
0.1
0
-50 0 50 100 150
-50 to 150 °C
Temperature °C
Ni120 TCR=0.00672
Ni110 TCR=0.00530
-100 to 300 °C
0.16
0.14
0.12
Error °C
0.1
0.08
-100 0 100 200 300 400
Temperature °C
0.1
0.09
Error °C
0.08
0.07
-100 -50 0 50 100 150 200 250 300
Practical Instrument Electronics, Inc. Copyright 2004. All rights reserved.
-80 to 260 °C
Temperature °C
512S-9001 2/28/05
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Model 512S Datasheet
Available Options:
Carrying Case Part Number: 020-0201
Other Products Available:
RTD Source (Single Type/1° resolution) Model 510
RTD Source (7 Types, Ω/0.1° resolution)
Pt100: α=1.3850, 1.3902, 1.3916, 1.3926
Cu10: α=1.427
Ni110: α=1.530
Ni120: α=1.672
RTD Read & Source (7 Types, Ω/0.1° resolution)
T/C Source (Single Type/1° resolution) Model 520
T/C Source (8 Types, mV/0.1° resolution)
B, E, J, K, N, R, S, T, mV
T/C Read & Source (8 Types, mV/0.1° resolution)
B, E, J, K, N, R, S, T, mV
Dual RTD – T/C Read & Source
with Auto Ramping & Stepping
4-20 Milliamp Loop Calibrator Model 530
4-20 Pocket-Mate Milliamp Loop Calibrator Model 531
4-20 Milliamp Loop Calibrator with Diagnostic Model 532
4-20/10-50 Dual Range Loop Calibrator Model 535
Frequency Read & Source with Totalizer Model 541
Model 511
Model 512
Model 521
Model 522
Model 525
Warranty
Our equipment is guaranteed against defective material and workmanship (excluding batteries) for a period of three years from the
date of shipment. Claims under guarantee can be made by returning the equipment prepaid to our factory. The equipment will be
repaired, replaced or adjusted at our option. The liability of Practical Instrument Electronics (PIE) is restricted to that given under our
guarantee. No responsibility is accepted for damage, loss or other expense incurred through sale or use of our equipment. Under no
condition shall Practical Instrument Electronics, Inc. be liable for any special, incidental or consequential damage.
Your Local PIE Representative
Practical Instrument Electronics, Inc. Copyright 2004. All rights reserved.
512S-9001 2/28/05
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