Diagnostic RTD & Milliamp Calibrator
Best RTD & Milliamp Calibrator on the market!
• The only 2-in-1 full function RTD & Milliamp
calibrator on the market
Only calibrator that combines ALL the functions of a diagnostic
milliamp calibrator with the accuracy of a laboratory RTD calibrator.
=
PIE 311
• Protect instruments & technicians from potentially
dangerous catastrophic failures due to hidden
loop problems
Quickly diagnose ground fault and current leakage often caused by
water in conduits and junction boxes with patented loop diagnostic
technology (US Patent# 7,248,058).
• 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.
• 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.
• Half the size of the closest competitor & easiest to use
Fits the palm of your hand like a cell phone and weighs less than a
pound. 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 of the plant with the backlit display.
Actual Size
Practical Instrument Electronics
82 E. Main Street Suite 3.14 • Webster, NY 14580 Tel: 585.872.9350 • Fax: 585.872.2638 • sales@piecal.com • www.piecal.com
More functions and better accuracy in one calibrator
• Two complete calibrators
Unlike any other combination RTD/milliamp calibrator
on the market the PIE 311Plus includes a FULL
function diagnostic milliamp calibrator that sources
and reads 0.000 to 24.000 mA, simulates two wire
transmitters, powers and measures transmitters with
its internal 24V supply, has a built-in 250 ohm resistor
for HART compatibility, and PIE’s patented Ground
Leak detection. Competitive calibrators allow you to
calibrate temperature transmitters but don’t have the
ability to test other instruments in a 4 to 20 milliamp
loop.
The other half of the calibrator sources and reads 12
RTD Sensors for
(alpha = 3850);
3926); Copper 10 & 50 Ohm, and Nickel 120 Ohm.
Platinum 10, 50, 100, 200, 500 & 1000
Platinum 100 Ohm (alpha=3902, 3916,
• Protect instruments & technicians from
potentially dangerous catastrophic
failures due to hidden loop problems
It’s important to find hidden loop problems BEFORE
they become cause product problems or catastrophic
failures. Only PIE Calibrators have Ground Leak
Detection that can detect these problems.
Some technicians routinely check their critical loops
for ground faults and current leaks using PIE’s Ground
Leak detection as part of their preventative maintenance
programs. When a significant leak or fault is detected
it is located and fixed before catastrophic failures
occur.
Sometimes the control room detects a problem that
isn’t fixed with routine calibration of the instruments.
The technician then reaches for a calibrator with
Ground Leak Detection to power up the loop and
confirm that the issue is hiding somewhere in the loop
wiring.
• Compatible with ALL process instruments
Calibrating smart transmitters and PLCs is a problem
for many electronic RTD calibrators. These instruments
measure RTD sensors with a pulsed excitation current
that is too fast for many calibrators to lock onto which
causes errors in calibration. The PIE 311Plus has
unique circuitry designed to accurately calibrate smart
and multivariable transmitters, PLC inputs, and
multichannel recorders. PIE guarantees compatibility
with all RTD instruments.
• Troubleshoot RTD sensors
When you have an RTD input problem that is difficult
to diagnose the PIE 311Plus makes it easy. When the
PIE 311Plus is connected directly to the RTD sensor it
will indicate on the display which wires are connected.
This quickly points out if there is problem with the
wiring or with the sensor itself. If no problem is found
with the sensor connect the 311Plus to the sensor
input connections on the instrument to see if it is
working properly. Secondary displays show you the
resistance value of the RTD plus the magnitude and
direction of the excitation current used by the instrument
to measure an RTD sensor. If no excitation current is
detected there is a problem with the instrument.
• Half t
he size
of the closest competitor &
easiest to use
Don’t get tired by lugging around heavy oversized test
equipment when you can carry the palm sized PIE
311Plus that weighs less than a pound. It comes with
a deluxe carrying case for simple, hands free operation.
The simple and intuitive double click menu and
EZ-Check switch are faster and easier to use than a
calibrator with lots of confusing buttons or with
confusing menus. And with the optional magnet strap
you can attach it to a panel or loop the strap around a
conduit or pipe.
Many calibrators don’t have automatic stepping and
ramping while others limit you to selecting either slow
or fast fixed 25% steps. The PIE 311Plus lets you
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.
Ground Leak Detection
Prevent Small Problems from Becoming Major Plant Failures
The PIE 311Plus offers powerful troubleshooting tools that offer visibility to the health of your loop that is not possible
with any calibrator brand on the market. Ground Leak Detection allows technicians to find and fix undetected
problems before they cause quality issues or become catastrophic failures - ending in poor product, injury, loss of
life, or equipment damage. Common loop problems caused by moisture, corrosion and contamination left unchecked
can lead to dangerous conditions that are easily avoided with the innovation technology in the PIE 311Plus.
Even the most common small errors caused by loop wiring issues can lead to inferior product, lost production time
and risk to personnel. Intrinsically safe loops are protected by barriers only against extreme overvoltage and over
current conditions but allowing small but significant ground faults to go undetected. PIE’s unique and powerful
Ground Leak Detection technology quickly and easily finds a fault that would otherwise go undetected. These
undetected faults could lead to potentially disastrous outcomes.
Have you ever replaced a “faulty” transmitter only to find the problem was somewhere else in the loop? And did you
end up throwing the transmitter away after you fixed the other problem “just in case” the transmitter was faulty?
If you find a loop where the transmitter is calibrated correctly but all the readings elsewhere in the loop have a fixed
offset this is due to a Zero Shift. This Zero Shift is typically caused by some of the current in the loop bypassing the
transmitter. If you have some loops that are erratic after it rains there may be moisture present in a junction box or
where insulation has broken down.
Only a PIE Calibrator with patented Ground Leak Detection can find all these hidden problems. Turn on Ground Leak
Detection and use the PIE 422Plus to power up the loop. Any current that isn’t controlled by the transmitter or other
current control element will be clearly indicated as leakage on the PIE 422Plus display.
Ground Leak detection allows technicians to troubleshoot loop problems with ease and confidence - minimizing risk
and maximizing process uptime.
Hidden Problem Found with Ground Leak Detection
Safe loop
Sealed junction box is dry and the control system
is operating within parameters.
Dry
Junction
Transmitter
input signal at
50% of Span
Box
+ IN - REF +OUT-
Transmitter
regulating
current to
12.00 mA
12.00mA
+
Control
System
Dangerous loop left undetected
The flooded junction box goes undetected and
the control system potentially goes further out of
control until...
Flooded
Junction
Transmitter
input signal at
50% of Span
Box
+ IN - REF +OUT-
Transmitter
regulating
current to
12.00 mA
12.51mA
+
Control
System
Sealed junction box is wet* and the control
system is operating with a fixed offset of 0.51
milliamps!
Transmitter
input signal at
50% of Span
* The value of the current leak increases when the water in the
junction box is contaminated with rust, salt or process chemicals.
OR
Hidden problem is detected by the PIE 311Plus.
The flooded sealed junction box is emptied and
the control system is once again operating within
parameters. The product, equipment, and
personnel are safe!
Dangerous loop
Flooded
Junction
+ IN - REF +OUT-
Transmitter
regulating
current to
12.00 mA
Disaster averted
Box
12.51mA
+
Control
System
Deluxe Hands Free
Carrying Case (Included)
Accessories
Evolution RTD Test
Leads (Included)
Included:
Red Rubber Boot, Four “AA” Alkaline batteries, Certificate of Calibration
Deluxe Hands Free Carrying Case Part No. 020-0211
Evolution RTD Wire Kit Part No. 020-0206
2 Red & 2 Black Leads with Banana Plugs & Spade Lugs
Optional:
Magnetic Hanging Strap Part No. 020-0236
Ni-MH Charger with 4 Ni-MH AA Batteries Part No. 020-0103
Magnetic Hanging Strap
(Optional)
PIE 311Plus Specifications
(Unless otherwise indicated all specifications are rated from a nominal 23°C, 70% RH for 1 year from calibration)
General
Operating Temperature
Range
Relative Humidity Range 10 % ≤RH ≤90 % (0 to 35 °C), Non-condensing
Temperature Drift
Size
Weight 12.1 ounces, 0.34 kg (including boot & batteries)
Batteries Four “AA” Alkaline 1.5V (LR6)
Battery Life 25 Hours RTD, 8 Hours milliamp
Isolation: Voltage 60V rms between all milliamp functions and Source/
Normal Mode Rejection 50/60 Hz, 50 dB
Common Mode Rejection 50/60 Hz, 120 dB
Optional NiMh
Rechargeable battery kit
Low Battery Low battery indication with nominal 1 hour of
Protection against
misconnection
Display High contrast graphic liquid crystal display. LED
Read mA
Ranges and Resolution
Accuracy ≤ ± (0.02 % of Reading + 0.003 mA)
Voltage burden ≤ 2V at 24 mA
Overload/Current limit
protection
Source mA / Power & Measure Two Wire Transmitters & PWRM LEAK
Ranges and Resolution
Accuracy ≤ ± (0.02 % of Reading + 0.003 mA)
Loop compliance voltage
Loop drive capability 1200 Ω at 20 mA for 15 hours nominal;
mA 2-Wire Transmitter Simulation
Accuracy Same as Source/Power & Measure
Voltage burden ≤ 2V at 20 mA
Overload/Current limit
protection
Loop voltage limits 2 to 60 VDC (fuse-less protected from reverse
Read Ohms & RTD
3 Wire & 4 Wire Accuracy
2 Wire Accuracy
Resistance Ranges 0.00 to 401.00, 0.0 to 4010.0 Ohms
Excitation Current
-25 to 60 °C (-10 to 140 °F)
10 % ≤RH≤ 70 % (35 to 60 °C), Non-condensing
± 0.01% of span outside of 23°C ±10 °C (73°C ±18 °F)
5.63 x 3.00 x 1.60 in, 143 x 76 x 41 mm (L x W x H)
Read RTD/Ohms
Charger, four
operation left
Over-voltage protection to 60 V dc (rated for 30
seconds)
backlighting for use in low lit areas.
0.000 to 24.000 mA or -25.00 to 125.00% of 4-20 mA
25 mA nominal
0.000 to 24.000 mA or -25.00 to 125.00% of 4-20 mA
≥ 24 DCV @ 20.00mA
950 Ω with Hart Resistor or leak detection running
24 mA nominal
polarity connections)
±(0.015% of Reading + 0.05 Ohms)
±(0.015% of Reading + 0.15 Ohms)
0.9 mA to 401 Ohms, 0.4 mA to 4010 Ohms (nominal)
NiMh batteries [Part # 020-0103]
Source Ohms & RTD
3 & 4 Wire Accuracy
From 1 to 10.2 mA
External Excitation Current
Below 1 mA of External
Excitation Current
2 Wire Accuracy
Resistance Ranges 0.00 to 401.00, 0.0 to 4010.0 Ohms
Allowable Excitation
Current Range
Pulsed Excitation
Current Compatibility
±(0.015% of Reading + 0.05 Ohms)
±(0.015% of Rdg + + 0.05 Ohms)
Add 0.1 Ohms to 3 Wire & 4 Wire Accuracy
0 to 400 Ohm: 10.2 mA max; steady or pulsed/intermittent
401 to 4000 Ohms: 1 mA max; steady or pulsed/intermittent
DC to 0.01 second pulse width
0.025 mV
mA Excitation Current
RTD Ranges & Accuracies
RTD
Type
Pt 100 Ohm
DIN/IEC/JIS 1989
ITS-90
Pt 10 Ohm
DIN/IEC/JIS 1989
Based on
ITS-90
Pt 50 Ohm
DIN/IEC/JIS 1989
ITS-90
Pt 200 Ohm
DIN/IEC/JIS 1989
ITS-90
Pt 500 Ohm
DIN/IEC/JIS 1989
ITS-90
Pt 1000 Ohm
DIN/IEC/JIS 1989
ITS-90
Pt 100 Ohm
(Burns)
Pt 100 Ohm
(Old JIS
1981)
Pt 100 Ohm
(US Lab)
Copper 10
Ohm (Minco)
Copper 50
Ohm
Ni 120 Ohm
(Pure)
Table based on 3 & 4 Wire RTD Accuracy:
≤ ± (0.015 % of Reading +0.05 Ohms)
[Read based on 1.0 mA of fixed excitation current]
Alpha Degrees C
Range
1.3850
(0.00385)
1.3850
(0.00385)
1.3850
(0.00385)
1.3850
(0.00385)
1.3850
(0.00385)
1.3850
(0.00385)
1.3902
(0.003902)
1.3916
(0.003916)
1.3926
(0.003926)
1.4274
(0.004274)
1.4280
(0.00428)
1.6720
(0.00672)
-200.00 to -150.00
-150.00 to 360.00
360.00 to 740.00
740.00 to 850.00
-200.00 to -120.00
-120.0 to 210.00
210.00 to 370.00
370.00 to 650.00
650.00 to 850.00
-200.00 to 200.00
200.00 to 550.00
550.00 to 850.00
-200.00 to -120.00
-120.00 to 180.00
180.00 to 450.00
450.00 to 680.00
680.00 to 850.00
-200.00 to -90.00
-120.00 to 180.00
180.00 to 450.00
450.00 to 680.00
680.00 to 850.00
-200.00 to 170.00
170.00 to 470.00
470.00 to 730.00
730.00 to 850.00
-195.61 to -100.00
-100.00 to 370.00
370.00 to 648.90
-200.00 to -140.00
-140.00 to 130.00
130.00 to 370.00
370.00 to 648.90
-200.00 to -140.00
-140.00 to 130.00
130.00 to 380.00
380.00 to 610.00
610.00 to 850.00
-200.00 to -150.00
-150.00 to 90.00
90.00 to 260.00
-50.00 to 150.00
-80.00 to 260.00
°C
±0.1°
±0.2°
±0.3°
±0.4°
±1.2°
±1.4°
±1.5°
±1.7°
±1.9°
±0.3°
±0.4°
±0.5°
±0.1°
±0.1°
±0.2°
±0.2°
±0.3°
±0.1°
±0.1°
±0.2°
±0.2°
±0.3°
±0.1°
±0.1°
±0.2°
±0.2°
±0.1°
±0.2°
±0.3°
±0.1°
±0.2°
±0.2°
±0.3°
±0.1°
±0.2°
±0.2°
±0.3°
±0.4°
±1.2°
±1.3°
±1.4°
±0.3°
±0.1°
Degrees F
Range
-328.0 to -238.00
-238.00 to 660.00
660.00 to 1364.00
1364.00 to 1562.00
-328.00 to -184.00
-184.00 to 410.00
410.00 to 698.00
698.00 to 1202.00
1202.00 to 1562.00
-328.00 to 392.00
392.00 to 1022.00
1022.00 to 1562.00
-328.00 to -184.00
-184.00 to 356.00
356.00 to 842.00
842.00 to 1256.00
1256.00 to 1562.00
-328.00 to -194.00
-184.00 to 356.00
356.00 to 842.00
842.00 to 1256.00
1256.00 to 1562.00
-328.00 to 338.00
338.00 to 878.00
878.00 to 1346.00
1346.00 to 1562.00
-320.10 to -148.00
-148.00 to 698.00
698.00 to 1200.00
-328.00 to -220.00
-220.00 to 266.00
266.00 to 698.00
698.00 to 1200.00
-328.00 to -220.00
-220.00 to 266.00
266.00 to 716.00
716.00 to 1130.00
1130.00 to 1562.00
-328.00 to -238.00
-238.00 to 194.00
194.00 to 500.00
-58.00 to 302.00
-112.00 to 500.00
°F
±0.2°
±0.4°
±0.6°
±0.7°
±2.2°
±2.6°
±2.8°
±3.1°
±3.4°
±0.6°
±0.8°
±1.0°
±0.1°
±0.2°
±0.3°
±0.4°
±0.5°
±0.1°
±0.2°
±0.3°
±0.4°
±0.5°
±0.1°
±0.2°
±0.3°
±0.4°
±0.3°
±0.4°
±0.6°
±0.2°
±0.3°
±0.4°
±0.6°
±0.2°
±0.3°
±0.4°
±0.5°
±0.7°
±2.2°
±2.4°
±2.4°
±0.5°
±0.2°
Problem found with RTD Sensor Wiring
Here is an example of the PIE 311Plus reading a
sensor with all 4 wires connected.
Only a calibrator with PIE’s patented 2, 3 & 4 wire detection makes
troubleshooting sensor wiring quick, easy and automatic. This is much
simpler and faster than going through the process of testing each pair of
wires to figure out which, if any, connection is loose or which wire is broken.
Here is an example where connections are made to a
4 wire sensor and the 311Plus indicates that only Wires
1, 2 & 4 are connected. There may be a loose
connection or a break in wire 3 somewhere between
the sensor and the 311Plus.
Additional Information
PIE Calibrators are designed, assembled, and calibrated in the
USA.
This product is calibrated on equipment traceable to NIST and
includes a Certificate of Calibration. Test Data is available for an
additional charge.
Practical Instrument Electronics recommends a calibration interval
of one year. Contact your local representative for recalibration and
repair services.
Practical Instrument Electronics
82 Est Main Street Suite 3.14 Webster, NY 14580
Tel: 585.872.9350 • Fax: 585.872.2638
sales@piecal.com • www.piecal.com
Warranty
Our equipment is warranted against defective material and
workmanship (excluding batteries) for a period of three years from
the date of shipment. Claims under warranty 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 warranty. 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.
Available From:
Copyright © 2017 All rights reserved 311Plus-9001 - Rev B 27 July 2017
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