PIE (Practical Instrument Electronics) 525PLUS User manual

PIE 525

Diagnostic Thermocouple

RTD & Milliamp Calibrator

Operating Instructions

PIE 525

Diagnostic Thermocouple

RTD & Milliamp Calibrator

Operating Instructions

Practical Instrument Electronics

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Contents

General Operations

Connections ............................................................................ 4

Accessories ............................................................................. 5

Carrying Case, Boot, and Magnet Strap .................................6

Changing Batteries & Storing EZ-CHECK Outputs ................7

Basic Operation

Switches & Knobs ................................................................8-9

MAIN Menus - Functions, Units & Ranges ...................... 10-11

Display Resolution & Troubleshooting Settings ..................... 12

Milliamp Display for RTD, Thermocouple, V & Ohms ........... 13

FEATURE Menu - Stepping & Ramping / Auto Off ............... 14

FEATURE Menu - Stepping & Ramping / Backlight .............15

Functions and Hookup Diagrams

Millivolt

Source mV; Read mV ...................................................... 16,17

Thermocouple

Source T/C & Read T/C Sensors ..................................... 18,19

Resistance

Source Resistance, Read Resistance.............................20, 21

RTD

Source RTD & Read RTD Sensors.................................22, 23

Troubleshooting

Troubleshooting RTD Instruments ........................................24

Troubleshooting Thermocouple Sensors ............................... 26

Troubleshooting RTD Sensors ..............................................28

Milliamp

Source mA ............................................................................ 30

Read mA ............................................................................... 31

Power/Measure mA ...............................................................32

Simulate 2-Wire Transmitters ................................................ 33

Calibrate 2-Wire Temperature Transmiters ............................ 34

Using Ground Leak Detection ...............................................36

Specifications

General ............................................................................38-41

Thermocouple Ranges & Accuracies...............................42-44

RTD Ranges & Accuracies ..............................................46-47

Warranty

Warranty & Additional Information ........................................ 49

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General Information

Calibrate all your T/C, RTD & mA Instruments

• Easy to use

Single calibrator that combines ALL the
functions of a diagnostic milliamp calibrator with
the accuracy of a laboratory thermocouple and
RTD calibrator.

• 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).

Calibrate T/C instruments to 0.1 & 0.01 °F & °C

•

The PIE 525Plus works with the thermocouples
you use including types J, K, T, E, R, S, B, N, G,
C, D, L (J-DIN), U (T-DIN) and P (Platinel II). Or
calibrate from -13.0000 to +80.0000 mV.

• Calibrate RTD instruments to 0.1 & 0.01 °F & °C

Stop carrying around a decade box and RTD
resistance tables. The 525Plus works with the
RTDs you use including Platinum 10, 50, 100,
200, 500 & 1000 Ohm (alpha = 3850), Platinum
100 Ohm (alpha = 3902, 3916, 3926), Copper 10
& 50 Ohm, and Nickel 120 Ohm. Or calibrate from

0.000 to 400.000 and 0.00 to 4000.00 Ohms.

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• Fast calibration with automatic output
stepping

Easily set any value quickly to within 0.1° or 0.01°
with the adjustable digital potentiometer “DIAL”
plus store any three temperatures for instant
recall with the EZ-CHECK™ switch. Choose
between 2, 3, 5, 11 steps and ramp to
automatically increment the output in 100%, 50%,
25%, 10% or 5% of span. Select step time from
5, 6, 7, 8, 9, 10, 15, 20, 25, 30 & 60 seconds.

• Compatible with ALL process instruments

No competitor’s calibrator is compatible with as
many process instruments! Connect directly to the
temperature inputs of transmitters, PLCs, DCS &
multichannel recorders to verify their outputs or
displays. RTD simulation works with older
instruments with fixed excitation currents and newer
multichannel instruments that switch the excitation
current between input channels.

• Measure thermocouple & RTD sensors

The PIE 525Plus measures probes to 0.1 or 0.01
°C or °F. For thermocouples a secondary
display shows the millivolts corresponding to the
sensor temperature. Also displays the cold
junction temperature measured by the calibrator.

For RTDs a secondary display shows the
resistance corresponding to the sensor
temperature.

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• Find problems with troubleshooting tools

Troubleshoot thermocouple probes by
measuring the resistance of the cables and
sensing element. Probes with high resistance
should be replaced before they burn out. Open
thermocouples and thermocouples that have
high resistance indicating impending failure are
indicated by OPEN TC and the resistance value
on the display.

Troubleshoot RTD sensor connections and find
broken wires with patented technology. Connect
your two, three or four wire RTDs and the PIE
525Plus automatically detects the connections.

For troubleshooting RTD measuring instruments
the 525Plus displays the fixed or pulsed sensor
excitation current outputted by the instrument.

• Calibration Lab Accurate & Stable

The internal cold junction thermistor is accurate
to ±0.05°C and is traceable to NIST. A stable
voltage reference and low drift components make
it more accurate than most other TC calibrators.

• Perform Heat Treating Uniformity Surveys and
System Accuracy Tests

The PIE 525Plus is capable of meeting the
requirements of an AMS 2750 Field Test Instrument
when certified by an accredited laboratory.

Become a troubleshooting technician with

Patented Diagnostic Technology - Available only

with PIE Calibrators!

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Connections

Simulating or reading thermocouples requires the use of
thermocouple or extension grade thermocouple wire. Plug
thermocouple wires into the miniature thermocouple jack.

The PIE 525Plus has two banana jacks (1+ & 2-) mounted in the
top end of the housing. These are not temperature compensated
and are to be used only for millivolt signals or thermocouple
signals with the cold junction turned off. The two banana jacks
(5+ and 6-) are for all milliamp signals.

Simulating or reading RTDs uses copper wire.

Plug 2, 3 or 4 wires into the corresponding jacks on the
calibrator. For RTD source the PIE 525Plus simulates the (+)
RTD from jacks 1 & 4 and the (-) RTD from jacks 2 & 3.

When reading an RTD sensor the PIE 525Plus uses patented
circuitry to automatically detect if 2, 3 or 4 wires are connected.
This is helpful to troubleshoot sensor connection (see
Troubleshooting an RTD Sensor).

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Accessories

INCLUDED:

Four “AA” Alkaline batteries, Certificate of Calibration

Evolution Hands Free Carrying Case Part No. 020-0211

Dark Blue Rubber Boot Part No. 020-0213

Test Leads - one pair with Part No. 020-0207
banana plug & alligator clips

Evolution RTD Wire Kit Part No. 020-0208
2 Red & 2 Black Leads with
Banana Plugs & Spade Lugs

OPTIONAL:

Ni-MH 1 Hour Charger with 4 Ni-MH AA Par t No. 020-0103

Batteries (100-120 V AC input for North America Only)

T/C Wire Kit 1* for Types J, K, T & E Part No. 020-0202

T/C Wire Kit 2* for Types B, R/S & N Part No. 020-0203

*Three feet (1 meter) of T/C extension wire, stripped on one
end with a miniature T/C male connector on the other end.

Magnet Strap Part No. 020-0236

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Operating Instructions

FIELD & BENCH USE

PIE 525Plus comes with a carrying case designed for hands­free operation and a rubber boot with a built-in tilt stand. The PIE
525Plus is held in the case by elastic straps for use with the
carrying case open. The tilt stand is easily raised by pulling the
stand until it locks into place.

Deluxe Hands Free Carrying

Case (Included)

Magnetic

Hanging Strap

(020-0236 Optional)

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Operating Instructions

CHANGING BATTERIES

Low battery is indicated by a battery symbol on the display.
Approximately one to four hours of typical operation remain before
the PIE 525Plus will automatically turn off. To change the batteries
remove the rubber boot and remove the battery door from the
back of the unit by sliding the door downward. This allows access
to the battery compartment. Replace with four (4) “AA” 1.5V
batteries being careful to check the polarity. Replace the battery
door and replace the boot. All stored configuration options (T/C
Type, EZ-CHECK Memories, etc.) are reset to factory settings
when the batteries are removed.
Note: Alkaline batteries are supplied and recommended for
typical battery life and performance. Optional rechargeable
batteries (charged externally) are available.

STORING HI and LO EZ-CHECK Source Outputs

Speed up your calibration by storing Span & Zero output setting
for instant recall with the EZ-CHECK switch.

1) Store your high (SPAN) output temperature by moving the

EZ-CHECK switch to the HI position and turning the EZ-Dial
knob until the desired output value is on the display. Press
and hold the EZ-Dial knob until STORED appears to store
the value. Release the EZ-Dial knob.

2) Store your low (ZERO) output value by moving the EZ-CHECK

switch to the LO position and turning the EZ-Dial knob until
the desired output value is on the display. Press and hold the
EZ-Dial knob until STORED appears to store the value.
Release the EZ-Dial knob.

3) Instantly output your SPAN and ZERO output settings by

moving the EZ-CHECK switch between HI and LO. You may
also select any third output setting (such as mid-range) using
the SET position on the EZ-CHECK switch.

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Operating Instructions

Basic Operation

+

-

22.4°C

T/C

43.307mV

1052.50

HI

Diagnostic Thermocouple

RTD & Milliamp Calibrator

2, 3, 4 Wire Detection

Loop Leak Detect ∙ Transmitter Supply

HI

SET

LO

OVERLOAD

°C

TYPE K

SOURCE

MAX

READ

OFF

MIN

READ

Double Click

Menu

Push & Turn

for
Fast Dialing
Push & Hold

to

Store/Step

q EZ-CHECK™ SWITCH

SOURCE: Instantly output two preset settings by moving the

EZ-CHECK™ switch to the “LO” position or “HI” position.
three point checks select the “SET” position. The PIE 525Plus
will remember the last “SET” value, even with the power off.
These values can easily be changed to suit the calibration requirements.
The values stored in the HI and LO positions are also used for Auto
Stepping.

For fast

READ: Slide the switch to the SET position. The PIE 525Plus will
display the current reading from the sensor or device being measured.
Slide the switch to MAX and the highest value measured since turn-on
or reset will be displayed; slide the switch to MIN and the lowest value
measured since turn-on or reset will be displayed.

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Operating Instructions

Basic Operation

w SOURCE/OFF/READ Switch

Select “SOURCE” to output mV, T/C, Ω or RTD and output/2-Wire
simulate mA.
Select “READ” to read mA, mV, T/C, Ω or RTD and read/Power­Measure mA.
Select “OFF” to turn off the 525Plus.

e EZ-DIAL™ KNOB

SOURCE: Turn the knob to adjust the output level. Turn clockwise to
increase the output, counter clockwise to decrease the output in one
least significant digit step at a time. Push down and turn the
EZ-DIAL knob for faster dialing.
Press and hold the knob for two seconds to store desired
EZ-Check™ HI/LO points in SOURCE mode. Continue to press and
hold the knob for two more seconds to start the automatic ramping.

READ: Press and hold to transfer the current temperature into
the EZ-Check™ MIN/MAX points. This clears the MIN/MAX
readings which will update as the input value changes.

SELECTING FUNCTIONS

The EZ-DIAL knob is used to setup the PIE 525Plus to match the
instrument to be calibrated or signal to be measured. Each time you
turn it on it displays the following screen for about 1 second followed
by operating in the function used the last time it was operated.

DOUBLE CLICK

EZ-DIAL KNOB

FOR CONFIGURATION

V ##.##

Double Click the EZ-DIAL knob to change the function of the
calibrator and to select ranges, units and other user settings.
Each function (mV, T/C, Ohms, RTD) has up to three pages of
menus. The first menu page has settings for the function and the
last menu page has settings for STEPPING, AUTO OFF and
BACKLIGHT. Settings are remembered even with the power off
but are reset when the batteries are changed.

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Operating Instructions

Double Click Menus - MAIN Page

Double click the EZ-DIAL knob to access the Double Click

Menus. Shown are the MAIN menus for each function. Turn the
knob to scroll thru the menus and press the knob to select. Default
values are in black and available choices are shown in grey.

Source V

>EXIT (1/4)
FUNCTION V
RANGE 80mV

>EXIT (1/3)
FUNCTION V
RANGE 80mV

Read V

Source & Read Thermocouples

>EXIT (1/4 for SOURCE, 1/3 for READ)
FUNCTION T/C
UNITS °C °F
T/C TYPE J K E T R S B N L U G C D P
COLD JUNC ON OFF

Source Ohms

>EXIT (1/4)
FUNCTION OHMS
RANGE 400Ω 4000Ω

>EXIT (1/3)
FUNCTION OHMS
RANGE 400Ω 4000Ω

Read Ohms

Source RTD

>EXIT (1/4)
FUNCTION RTD
UNITS °C °F
RTD Pt 100 a=3850 [*RTD Types - See Read RTD]

Read RTD

>EXIT (1/3)
FUNCTION RTD
UNITS °C °F

RTD Pt 100 a=3850,

Pt 1000 a=3850, Pt 100 a=3902, Pt 100 a=3916,
Pt 100 a=3926, Cu 10 a=4274, Cu 50 a=4280, Ni 120 a=6720
Pt 10 a=3850, Pt 50 a=3850

Pt 200 a=3850, Pt 500 a=3850,

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Operating Instructions

Double Click Menus - MAIN Page

Source mA &

Simulate 2 Wire Transmitters

MAIN

> EXIT (1/2)
FUNCTION mA
mA MODE SOURCE 2W SIM
UNITS mA %
HART 250Ω ON OFF

Read mA, Power/Measure Transmitters & Leak

Detect

MAIN

> EXIT (1/2)
FUNCTION mA
mA MODE READ PWR MEAS
UNITS mA %
HART 250Ω ON OFF

Turn the e DIAL KNOB to move through the two to four pages
of menus. Press the e DIAL KNOB to toggle between OFF and
ON or to scroll through the settings.

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Operating Instructions

Double Click Menu - DISPLAY Page

Double click the e DIAL KNOB at any time the unit is on and
then turn the e DIAL KNOB to move to the second menu page
so the word DISPLAY appears at the top of the menu.
Turn the e DIAL KNOB to move through the menu. Press the e
DIAL KNOB to toggle between LOW and HIGH or OFF and ON.

LOW resolution is 0.001 mV, 0.01Ω in 400Ω Range, 0.1Ω in
4000Ω Range and 0.1° for T/C & RTD. HIGH resolution is 0.0001
mV, 0.001Ω in 400Ω Range, 0.01Ω in 4000Ω Range and 0.01° for
T/C & RTD. Milliamp always has resolution of 0.001 mA/0.01%.

> EXIT (2/4 SOURCE, 2/3 READ)
RESOLUTION LOW HIGH

T/C DISPLAY
> EXIT (2/4 SOURCE, 2/3 READ)
RESOLUTION LOW HIGH

DISPLAY mV OFF ON
DISPLAY CJ OFF ON [Cold Junction Temperature]
TC PROBE Ω OFF ON

V DISPLAY

[Probe Resistance - Read Only]

> EXIT (2/4 SOURCE, 2/3 READ)
RESOLUTION LOW HIGH

SENSOR mA* OFF ON

RTD DISPLAY
> EXIT (2/4 SOURCE, 2/3 READ)
RESOLUTION LOW HIGH

DISPLAY OHMS OFF ON
SENSOR mA* OFF ON [Source Ohm & RTD Only]

EXIT MENU - exits this menu immediately and saves any

changes. Menu will automatically exit after 15 seconds of
inactivity. Settings are remembered even with the power off.

OHMS DISPLAY

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Operating Instructions

Double Click Menu - mA Display

mA MODE - pressing the knob will cycle through READ,
PWRM, READ%, PWRM% and OFF.

mA DISPLAY (For RTD, T/C, V & OHMS)

> EXIT (3/4)
mA MODE
HART 250Ω ON OFF

LEAK DETECT OFF ON

READ turns on the mA display and indicates current passing
through the loop proportional to the input of the transmitter
which is controlled by the output of the 525Plus. Choose

READ% to display in percent of 4-20 milliamps.

PWRM is POWER MEASURE which uses the internal loop

supply of the 525Plus to power up the transmitter while
indicating the current passing through the loop proportional to
the input of transmitter which is controlled by the output of the
525Plus. Choose PWRM% to display in percent of 4-20
milliamps.

If PWRM or PWRM% is selected an additional menu
selection of LEAK DETECT will appear. When LEAK
DETECT is turned on the 525Plus will display LEAK and
the amount of current that is uncontrolled in the loop. This may
be due to a faulty transmitter, corrosion causing a bridge to
ground or moisture present at some connection point. When
LEAK DETECT tests a loop with leakage the loop mA
signal will be affected.

HART 250Ω - turn on the 250Ω resistor if you are powering
up a HART transmitter. This provides the loop load required for
HART communication.

[SOURCE ONLY]

OFF READ PWRM READ% PWRM%

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Operating Instructions

Double Click Menu - FEATURES

To change the Automatic Stepping settings

Double click the e DIAL KNOB at any time the unit is on and
the following typical display (will be different for each FUNCTION)
will appear for 15 seconds:

MAIN
> EXIT (1/3)
FUNCTION T/C
UNITS °C
T/C TYPE J
COLD JUNC ON

Turn the
RTD, V & Ohms or the second menu page for mA so the word
FEATURES appears at the top of the menu.

Turn the e DIAL KNOB to move through the menu. Press the e
DIAL KNOB to toggle between OFF and ON or to change the
STEPS/RAMP and the STEP/RAMP TIME settings. These
settings are remembered even with the power off.

EXIT MENU - exits this menu immediately and saves any
changes. Menu will automatically exit after 15 seconds of
inactivity.

e DIAL KNOB to move to the third menu page for T/C,

FEATURES

> EXIT (2 or 3/2,3 or 4)
AUTO OFF ON
BACKLIGHT ON
STEPS/RAMP 3
STEP/RAMP TIME 5

[SOURCE ONLY]
[SOURCE ONLY]

AUTO OFF - If AUTO OFF is ON, the unit will turn off after 30

minutes of inactivity to save battery life. If AUTO OFF is OFF the
unit will stay on until the POWER SWITCH is moved to the off
position.

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Operating Instructions

Double Click Menu - FEATURES

STEPS/RAMP - pressing the knob will cycle through 2, 3, 5, 11

and RAMP. The endpoints of the steps or ramp are based on the
values stored in the HI and LO EZ-CHECK outputs.

2 steps will automatically switch between the values stored in
the HI & LO EZ-CHECK (0 & 100%).

3 steps between the HI, Midpoint and LO EZ-CHECK (0, 50
& 100%).

5 steps between the HI and LO EZ-CHECK in 25%
increments (0, 25, 50, 75 & 100%).

11 steps between the HI and LO EZ-CHECK in 10%
increments (0, 10, 20...80, 90 &100%).

RAMP continuously ramps up and down between the HI and
LO EZ-CHECK outputs.

STEP/RAMP TIME - pressing the knob will cycle through 5, 6, 7,
8, 9, 10, 15, 20, 25, 30 and 60 seconds.

To start the Automatic Stepping

Start automatic stepping or ramping by placing the EZ-CHECK
Switch into the HI or LO position then press and hold the e
DIAL KNOB for 6 seconds (the word STORE will appear on the
display after 3 seconds and continue to press the EZ-DIAL
KNOB) until the word STEPPING appears on the display. The
word STEPPING will appear on the display anytime the selected
automatic function is running. Stop the stepping by again
pressing and holding the

e DIAL KNOB for 6 seconds.

BACKLIGHT - If BACKLIGHT is ON the backlight will light all the
time the unit is powered up. For maximum battery life turn the
backlight off when using the calibrator in areas with enough
ambient light to read the display.

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SOURCE mV

Choose this function to provide an output from -13.000 to 80.000
mV in LOW resolution and -13.0000 to 80.0000 mV in HIGH
resolution. The source current is a nominal 12 mA to provide the
driving power to analog thermocouple meters.

Move the power switch

w to SOURCE then Double Click the

EZ-DIAL knob to get into the Menu. Turn the knob to scroll
through the settings and press the knob to make your selection.
Select V for the FUNCTION.

Connect the output leads of the PIE 525Plus to the inputs of the
device being calibrated, making sure to check polarity. Red lead
to the plus (+) input and black lead to the minus (-) input.

Instantly output your SPAN and ZERO output settings by moving
the EZ-CHECK switch between HI and LO. You may also select
any third output setting (such as mid-range) using the SET
position on the EZ-CHECK switch. The output is adjusted in

0.001 mV increments in LOW and 0.0001 increments in HIGH
resolution by turning the knob

e. Press and turn the knob for

faster dialing with 0.100 mV increments in LOW and 0.1000 mV
increments in HIGH resolution.

Voltage Receiver Input

+

-

 

2 1

40.000

Diagnostic Thermocouple

RTD & Milliamp Calibrator

2, 3, 4 Wire Detection

Loop Leak Detect ∙ Transmitter Supply

SOURCE

MAX

HI

READ

SET

OFF

MIN

LO

Double Click

OVERLOAD

mV

READ

Menu

Push & Turn

for
Fast Dialing
Push & Hold

to
Store/Step

Controller

Transmitter

Computer

Logger

DCS

mV Source

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Read mV

Choose this function to measure from -13.000 to 80.000 mV in
LOW resolution and -13.0000 to 80.0000 mV in HIGH resolution.

Move the power switch

w to READ then Double Click the

EZ-DIAL knob to get into the Menu. Turn the knob to scroll
through the settings and press the knob to make your selection.
Select V for the FUNCTION.

Connect the red input lead (+) of the PIE 525Plus to the more
positive point and the black input lead (-) to the more negative
point.

Signals above the maximum scale are limited by protection
circuitry with “OVER RANGE” flashed on the display and the red
OVERLOAD LED lit.

The PIE 525Plus measures the input signal and constantly
updates the display with the current reading. Move the
EZ-CHECK switch
MIN to see the lowest reading. Press and hold the knob

q to MAX to see the highest reading and to

e to

clear the MAX and MIN readings.

+

-

 

2 1

52.501

MAX

Diagnostic Thermocouple

RTD & Milliamp Calibrator

2, 3, 4 Wire Detection

Loop Leak Detect ∙ Transmitter Supply

SOURCE

MAX

HI

READ

SET

OFF

MIN

LO

Double Click

OVERLOAD

Voltage Output Signal

Controller

Transmitter

mV

Power Supply

mV Read

READ

Menu

Push & Turn

for
Fast Dialing
Push & Hold

to
Store/Step

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Source Thermocouple

Choose this function to provide a simulated thermocouple signal
into controllers, temperature transmitters, indicators or any input
devices that measure thermocouple sensors.

Move the power switch

w to SOURCE then Double Click the

EZ-DIAL knob to get into the Menu. Turn the knob to scroll
through the settings and press the knob to make your selection.
Select T/C for the FUNCTION, °F or °C for the UNITS, T/C Type
(J, K, E, T, R, S, B, N, L (J-DIN), U (T-DIN), G, C, D or P (Platinel
II)) and internal COLD JUNC ON or OFF (ON is the default).

Connect the PIE 525Plus to the inputs of the device being
calibrated using the proper type of thermocouple wire via the
miniature thermocouple socket.

Instantly output your SPAN and ZERO output settings by moving
the EZ-CHECK switch between HI and LO. You may also select
any third output setting (such as mid-range) using the SET
position on the EZ-CHECK switch. The output is adjusted in 0.1°
increments in LOW and 0.01° increments in HIGH resolution by
turning the knob

e. Press and turn the knob for faster dialing

with 10.0° increments in LOW and 10.00° increments in HIGH
resolution.

Thermocouple Wire

Instrument with T/C Input

Controller

22.4°C

43.307mV

1052.50

HI

TYPE K

Diagnostic Thermocouple

RTD & Milliamp Calibrator

2, 3, 4 Wire Detection

Loop Leak Detect ∙ Transmitter Supply

SOURCE

MAX

HI

READ

SET

OFF

MIN

LO

Double Click

OVERLOAD

+

-

T/C

°C

READ

Menu

Push & Turn

for
Fast Dialing
Push & Hold

to
Store/Step

Temperature Transmitter

Temperature Indicator

Temperature Trip or Alarm

Miniature thermocouple connector

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Read Thermocouple Sensors

Choose this function to measure temperatures with a
thermocouple probe, sensor or any devices that output a
thermocouple signal.

Move the power switch

w to READ then Double Click the

EZ-DIAL knob to get into the Double Click Menu. Turn the knob
to scroll through the settings and press the knob to make your
selection. Select T/C for the FUNCTION, °F or °C for the UNITS,
T/C Type (J, K, E, T, R, S, B, N, L (J-DIN), U (T-DIN), G, C, D or
P (Platinel II)) and COLD JUNC ON or OFF (ON is the default).

Connect the PIE 525Plus to the inputs of the device being
calibrated using the proper type of thermocouple wire via the
miniature thermocouple socket. If no sensor is connected, a wire
is broken or the sensor is burned out, OPEN TC will appear on
the display. Signals above the maximum scale are limited by
protection circuitry with “OVER RANGE” on the display.

The PIE 525Plus measures the input signal and constantly
updates the display with the current reading. Move the
EZ-CHECK switch

q to MAX to see the highest reading and to

MIN to see the lowest reading. Press and hold the knob e to
clear the MAX and MIN readings.

Thermocouple

Wire

+

-

23.7°C

T/C

21.710mV

525.00

°C

MIN

TYPE K

Diagnostic Thermocouple

RTD & Milliamp Calibrator

2, 3, 4 Wire Detection

Loop Leak Detect ∙ Transmitter Supply

SOURCE

MAX

HI

READ

SET

OFF

MIN

LO

READ

Double Click

Menu

OVERLOAD

Push & Turn

for
Fast Dialing
Push & Hold

to

Store/Step

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Source Resistance

Choose this function to provide a simulated resistance into any
device that measures resistance.

Move the power switch w to SOURCE then Double Click the
EZ-DIAL knob to get into the Menu. Turn the knob to scroll
through the settings and press the knob to make your selection.
Select OHMS for the FUNCTION, 400Ω or 4000Ω for the RANGE.
Turn on SENSOR mA to check the excitation current generated
by the receiver.

Disconnect all sensor wires from the devices to be calibrated and
connect the PIE 525Plus to the inputs of the device using 2, 3 or 4 wires.

Instantly output your SPAN and ZERO output settings by moving
the EZ-CHECK switch between HI and LO. You may also select
any third output setting (such as mid-range) using the SET
position on the EZ-CHECK switch. The output is adjusted for
400Ω/4000Ω ranges in 0.01Ω/0.1Ω increments in LOW and

0.001Ω/0.01Ω increments in HIGH resolution by turning the knob

e. Press and turn the knob for faster dialing with 1.00Ω/10.0Ω

increments in LOW and 1.000Ω/10.00Ω increments in HIGH
resolution.

Instrument with

+--+

   

3 2 1 4

01.05mA FIXED

305.25

HI

Diagnostic Thermocouple

RTD & Milliamp Calibrator

2, 3, 4 Wire Detection

Loop Leak Detect ∙ Transmitter Supply

SOURCE

MAX

HI

READ

SET

OFF

MIN

LO

Double Click

OVERLOAD

Push & Turn

Fast Dialing
Push & Hold

Ω

READ

Menu

for

to

Store/Step

Resistance Input

Controller

Transmitter

PLC

2, 3 & 4 Wire Resistance Connections

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Read Resistance

Choose this function to measure resistance.

Move the power switch

w to READ then Double Click the

EZ-DIAL knob to get into the Menu. Turn the knob to scroll
through the settings and press the knob to make your selection.
Select OHMS for the FUNCTION, 400Ω or 4000Ω for the
RANGE.

Connect the PIE 525Plus to the resistor or sensor using 2, 3 or 4
wires. The PIE 525Plus automatically detects how many wires
are connected using a patented circuit and indicates each wire
that is connected. Any wires that are not connected or broken are
indicated by the 525Plus. This is useful for troubleshooting the
sensor.

Signals above the maximum scale are limited by protection
circuitry with “OVER RANGE” on the display.

The PIE 525Plus measures the input signal and constantly
updates the display with the current reading. Move the
EZ-CHECK switch

q to MAX to see the highest reading and to

MIN to see the lowest reading. Press and hold the knob e to
clear the MAX and MIN readings.

+

-

 

2 1

2, 3, 4 Wire Detection

Loop Leak Detect ∙ Transmitter Supply

MAX

HI

READ

SET

OFF

MIN

LO

Double Click

OVERLOAD

SOURCE

Ω

READ

Menu

Push & Turn

for
Fast Dialing
Push & Hold

to
Store/Step

2, 3 & 4 Wire Resistance Connections

250.025

Diagnostic Thermocouple

RTD & Milliamp Calibrator

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Source RTD

Choose this function to provide a simulated RTD signal into
controllers, temperature transmitters, indicators or any input
devices that measure RTD sensors.

Move the power switch

w to SOURCE then Double Click the

EZ-DIAL knob to get into the Menu. Turn the knob to scroll
through the settings and press the knob to make your selection.
Select RTD for the FUNCTION, °F or °C for the UNITS and RTD
(Platinum 10, 50, 100, 200, 500 & 1000 Ohm (alpha = 3850),
Platinum 100 Ohm (alpha = 3902, 3916, 3926), Copper 10 & 50
Ohm, and Nickel 120 Ohm). Turn on SENSOR mA to check the
excitation current generated by the receiver.
Note: Platinum (Pt) 100Ω 3850 is the most common RTD type.

Disconnect all sensor wires from the devices to be calibrated and
connect the PIE 525Plus to the inputs of the device using 2, 3 or 4 wires.

Instantly output your SPAN and ZERO output settings by moving
the EZ-CHECK switch between HI and LO. You may also select any
third output setting (such as mid-range) using the SET position on
the EZ-CHECK switch. The output is adjusted in 0.1° increments
in LOW and 0.01° increments in HIGH resolution by turning the

e. Press and turn the knob for faster dialing with 10.0°

knob
increments in LOW and 10.00° increments in HIGH resolution.

Instrument with RTD Input

+--+

   

3 2 1 4

01.15mA PULSE

289.27 Ω

525.00

LO

Pt 100 α=3850

Diagnostic Thermocouple

RTD & Milliamp Calibrator

2, 3, 4 Wire Detection

Loop Leak Detect ∙ Transmitter Supply

SOURCE

MAX

HI

READ

SET

OFF

MIN

LO

Double Click

OVERLOAD

°c

READ

Menu

Push & Turn

for
Fast Dialing
Push & Hold

to

Store/Step

Controller

Temperature Transmitter

Temperature Indicator

Temperature Trip or Alarm

2, 3 & 4 Wire RTD Connections

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Read RTD Sensors

Choose this function to measure temperatures with an RTD
probe, sensor or any devices that output an RTD signal.

Move the power switch w to READ then Double Click the EZ-DIAL
knob to get into the Menu. Turn the knob to scroll through the settings
and press the knob to make your selection. Select RTD for the
FUNCTION, °F or °C for the UNITS and RTD (Platinum 10, 50, 100,
200, 500 & 1000 Ohm (alpha = 3850), Platinum 100 Ohm (alpha =
3902, 3916, 3926), Copper 10 & 50 Ohm, and Nickel 120 Ohm).
Note: Platinum (Pt) 100Ω 3850 is the most common RTD type.

Connect the PIE 525Plus to the RTD sensor using 2, 3 or 4 wires.
The PIE 525Plus automatically detects how many wires are
connected using a patented circuit and indicates each wire that is
connected. Any wires that are not connected or broken are
indicated by the 525Plus. This information is useful for
troubleshooting the sensor.

Signals above the maximum scale are limited by protection
circuitry with “OVER RANGE” on the display.

The PIE 525Plus measures the input signal and constantly updates
the display with the current reading. Move the EZ-CHECK switch q
to MAX to see the highest reading and to MIN to see the lowest
reading. Press and hold the knob e to clear the MAX & MIN readings.

+

--

  

3 2 1

138.51 Ω

100.00

°c

Pt 100 α=3850

MIN

Diagnostic Thermocouple

RTD & Milliamp Calibrator

2, 3, 4 Wire Detection

Loop Leak Detect ∙ Transmitter Supply

SOURCE

MAX

HI

READ

SET

OFF

MIN

LO

READ

Double Click

Menu

OVERLOAD

Push & Turn

for
Fast Dialing
Push & Hold

to

Store/Step

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Troubleshooting RTD Instruments

When you are having an issue where an instrument won't read
an RTD sensor or you don't know if the calibrator is connected
properly the PIE 525Plus has a function to measure and display
the fixed or pulsed sensor (excitation) current that the instrument
uses to measure the resistance of the RTD sensor.

Double click the e DIAL KNOB at any time the unit is set to SOURCE
RTD and then turn the e DIAL KNOB to move to the second menu
page so the word DISPLAY appears at the top of the menu.
Turn the e DIAL KNOB to move through the menu until the
cursor is pointing at SENSOR mA. Press the e DIAL KNOB to
toggle SENSOR mA ON.

Disconnect all sensor wires from the devices to be calibrated and
connect the PIE 525Plus to the inputs of the device using 2, 3 or 4
wires. The sensor current generated by the instrument will be
indicated on the display followed by the word FIXED or PULSE. Older
single channel RTD instruments used a constant (fixed) current
source to measure an RTD sensor. Smart transmitters, multichannel
recorders and PLC or DCS input cards switch the current source
sequentially through the channels which is seen as an intermittent
(pulsed) current.

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Instrument with RTD Input

°C

00.21mA FIXED

289.27 Ω

525.00

01.15mA PULSE

289.27 Ω

525.00

°C

Controller

Temperature Transmitter

Temperature Indicator

Temperature Trip or Alarm

+--+

   

3 2 1 4

01.15mA PULSE

289.27 Ω

2, 3, 4 Wire Detection

MAX

READ
MIN

°c

SOURCE

OFF

READ

Double Click

Menu

Push & Turn

Fast Dialing
Push & Hold

Store/Step

for

to

525.00

LO

Pt 100 α=3850

Diagnostic Thermocouple

RTD & Milliamp Calibrator

Loop Leak Detect ∙ Transmitter Supply

HI

SET

LO

OVERLOAD

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Troubleshooting Thermocouple Sensors or Probes

All thermocouple sensors have some resistance when they are
new and the resistance increases over time as the thermocouple
element ages. Contamination or corrosion of the sensor or the
at the terminal block can also add resistance. Knowing the
resistance of the sensor and wiring of the thermocouple may be
used as a preventive maintenance tool allowing you to replace
thermocouple sensors before they fail.

Double click the
READ T/C and then turn the e DIAL KNOB to move to the
second menu page so the word T/C DISPLAY appears at the
top of the menu. Turn the e DIAL KNOB to move through the
menu until the cursor is pointing at TC PROBE Ω. Press the e
DIAL KNOB to toggle TC PROBE Ω ON.

Connect the PIE 525Plus to the inputs of the device being
calibrated using the proper type of thermocouple wire via the
miniature thermocouple socket or you may use copper wire
plugged into jacks 1 & 2.

If no sensor is connected, a wire is broken or the sensor is burned
out, OPEN TC will appear on the display. Signals above the
maximum scale are limited by protection circuitry with “OVER
RANGE” on the display.

Note: The measurement of thermocouple resistance is not a
precise reading but is a general indication of the condition of the
thermocouple sensor and connections.

e DIAL KNOB at any time the unit is set to

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001.25KΩ

-

T/C

23.7°C

21.710mV

525.00

TYPE K

Diagnostic Thermocouple

RTD & Milliamp Calibrator

2, 3, 4 Wire Detection

Loop Leak Detect ∙ Transmitter Supply

OVERLOAD

SOURCE

MAX

HI

READ

SET

OFF

MIN

LO

READ

Double Click

Menu

Push & Turn

Fast Dialing
Push & Hold

Store/Step

Thermocouple

+

°C

for

to

Wire

001.25KΩ

23.7°C

21.710mV

525.00

TYPE K

Page 27

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T/C

+

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Troubleshooting RTD Sensors

When troubleshooting a problem with an RTD input it is useful to
check that the sensor and the wiring to the instrument is
operating properly.

The PIE 525Plus automatically detects 2, 3 and 4 wire RTD
connections with a patented circuit. It will also display the
connections on the display and indicate when there is a missing
connection due to a loose connector, corrosion or a broken wire.

Here is an example of the 525Plus reading a
sensor with all 4 wires connected.

Here is an example where connections are
made to a 4 wire sensor and the PIE 525Plus
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
525Plus.

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mA SOURCE/ % SOURCE (Percent of 4 to 20 mA)

Choose this function to provide an output from 0.000 to 24.000
milliamps. The compliance voltage is a nominal 24 VDC to
provide the driving power to your milliamp receivers.

Move the power switch

w to SOURCE then Double Click the

EZ-DIAL knob to get into the menu. Turn the knob to scroll
through the settings and press the knob to make your selection.
Select mA for the FUNCTION and SOURCE for the MODE.
Choose either mA or % and whether you need the 250Ω HART
resistor active in the loop.

Connect the output leads of the PIE 525Plus to the inputs of the
device being calibrated, making sure to check polarity. Red lead
to the plus (+) input and black lead to the minus (-) input.

Instantly output your SPAN and ZERO output settings by moving
the EZ-CHECK switch between HI and LO (defaults to 20 & 4
mA). You may also select any third output setting (such as
mid-range) using the SET position on the EZ-CHECK switch.
The output is adjusted in 0.001 mA (0.01%) increments by
turning the knob

e. Press and turn the knob for faster dialing

with 0.100 mA (1.00%) increments.

Note: If there is a break in the loop (or no test leads are
connected) ERROR will be displayed and the mA value will blink.

Milliamp Receiver Input

+

-

 

SOURCE

HART

5 6

20.000

HI

Diagnostic Thermocouple

RTD & Milliamp Calibrator

2, 3, 4 Wire Detection

Loop Leak Detect ∙ Transmitter Supply

MAX

HI

READ

SET

MIN

LO

OVERLOAD

mA

SOURCE

OFF

READ

Double Click

Menu

Push & Turn

for

Fast Dialing

Push & Hold

to

Store/Step

Controller

Transmitter

Computer

Logger

I/P

DCS

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All Milliamp Connections

READ mA, READ % (Percent of 4 to 20 mA)

Choose this function to measure from 0.000 to 24.000 milliamps
or -25.00 to 125.00%.

Move the power switch

w to READ then Double Click the

EZ-DIAL knob to get into the Menu. Turn the knob to scroll
through the settings and press the knob to make your selection.
Select mA for the FUNCTION and READ for the MODE.
Choose either mA or % and whether you need the 250Ω HART
resistor active in the loop.

Connect the red input lead (+) of the PIE 525Plus to the more
positive point of the break and the black input to the more
negative point.

Signals below 0 mA or open circuits are indicated by 0.000 mA
(-25.00%) on the display. Signals above 24 mA are current
limited by protection circuitry with “OVERRANGE” flashed on the
display and the red OVERLOAD LED lit.

The PIE 525Plus measures the input signal and constantly
updates the display with the current reading. Move the
EZ-CHECK switch

q to MAX to see the highest reading and to

MIN to see the lowest reading. Press and hold the knob e to
clear the MAX and MIN readings.

Milliamp Output Signal

+

-

 

READ

HART

5 6

19.997

Diagnostic Thermocouple

RTD & Milliamp Calibrator

2, 3, 4 Wire Detection

Loop Leak Detect ∙ Transmitter Supply

MAX

HI

READ

SET

OFF

MIN

LO

Double Click

OVERLOAD

mA

SOURCE

READ

Menu

Push & Turn

for
Fast Dialing
Push & Hold

to
Store/Step

Controller

Transmitter

P/I

DCS

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All Milliamp Connections

Power/Measure mA, Power/Measure % (Percent of 4 to 20 mA)

Choose this function to simultaneously supply power to a 2 Wire
Transmitter while displaying the 4.000 to 20.000 mA output of
the transmitter.

Move the power switch

w to READ then Double Click the

EZ-DIAL knob to get into the menu. Turn the knob e to scroll
through the settings and press the knob to make your selection.
Select mA for the FUNCTION and PWR MEAS for the
MODE. Choose either mA or % and whether you need the
250Ω HART resistor active in the loop.

Disconnect one or both input wires from the device to be
calibrated. Connect the red source lead of the PIE 525Plus to
the plus (+) input of the device and the black source lead to the
minus (-).

The PIE 525Plus supplies a nominal 24 volts DC at 24 mA to the
2 Wire Transmitter. The current passed by the transmitter will be
accurately displayed by the PIE 525Plus. Calibrate the transmitter
in the usual manner and disconnect the PIE 525Plus. Signals
above 24 mA are current limited by protection circuitry with
“OVERRANGE” flashed on the display and the red OVERLOAD
LED will flash.

 

PWRM

HART

5 6

11.997

mA

Transmitter Input

Sensor

Process Signal

Simulated Input

+ IN - REF -OUT+

Typical
2-Wire

Transmitter

All Milliamp Connections

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2 Wire SIM mA, 2 Wire SIM % (Percent of 4 to 20 mA)

Choose this function to simulate a 2 Wire Transmitter output from

0.000 to 24.000 milliamps. Operates in loops with power supply
voltages from 2 to 60 VDC.

Move the power switch w to SOURCE then Double Click the
EZ-DIAL knob to get into the Menu. Turn the knob to scroll
through the settings and press the knob to make your selection.
Select mA for the FUNCTION and 2W SIM for the MODE.
Choose either mA or % and whether you need the 250Ω HART
resistor active in the loop.

Connect the output leads of the PIE 525Plus to the inputs of the
device being calibrated, making sure to check polarity. Red lead
to the plus (+) input and black lead to the minus (-) input.

Instantly output your SPAN and ZERO output settings by moving
the EZ-CHECK switch between HI and LO (defaults to 20 & 4
mA). You may also select any third output setting (such as
mid-range) using the SET position on the EZ-CHECK switch.
The output is adjusted in 0.001 mA (0.01%) increments by
turning the knob

e. Press and turn the knob for faster dialing

with 0.100 mA (1.00%) increments.

Note: If there is a break in the loop (or no test leads are
connected) ERROR will be displayed and the mA value will blink.

Receiver

Powers External

2-Wire Transmitter

Power Supply

(2 to 60 VDC)

 

5 6

12.422

2-WIRE

mA

Page 33

To

Sensor

+ IN - REF +OUT-

Typical

2-Wire

Transmitter

(Disconnected)

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Calibrate a 2-Wire Thermocouple or RTD Transmitter by
sourcing the input while monitoring the output.

Move the power switch w to SOURCE and Double click the e
DIAL KNOB and the MAIN menu for the function in use will
appear for 15 seconds:

MAIN
>EXIT (1/4)

FUNCTION RTD
UNITS °C °F

RTD Pt 100 a=3850

Turn the e DIAL KNOB to move to FUNCTION. Select T/C or
RTD for the FUNCTION, °F or °C for the UNITS, and the T/C

or RTD Type. Turn the e DIAL KNOB to move to the third
menu page so the word mA DISPLAY appears at the top of
the menu.

mA DISPLAY

> EXIT (3/4)
mA MODE OFF READ PWRM READ% PWRM%
HART 250Ω OFF ON
LEAK DETECT OFF ON

MAIN

>EXIT (1/4)
FUNCTION T/C
UNITS °C °F
T/C TYPE J
COLD JUNC ON

Turn the
DIAL KNOB to toggle between OFF and ON or to change the
mA MODE setting.
mA MODE - pressing the knob will cycle through READ, PWRM,
READ% ,PWRM% and OFF.

e DIAL KNOB to move through the menu. Press the e

READ turns on the mA display and indicates current passing
through the loop proportional to the input of the transmitter
which is controlled by the output of the 525Plus. Choose
READ% if your would like the mA display in percent of 4-20
milliamps.

PWRM is POWER MEASURE which uses the internal loop
supply of the 525Plus to power up the transmitter while

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indicating the current passing through the loop proportional to
the input of transmitter which is controlled by the output of the
525Plus. Choose PWRM% if your would like the mA display
in percent of 4-20 milliamps.

If PWRM or PWRM% is selected an additional menu
selection of LEAK DETECT will appear. When LEAK
DETECT is turned on the 311Plus will display LEAK and the
amount of current that is uncontrolled in the loop. This may be
due to a faulty transmitter, corrosion causing a bridge to
ground or moisture present at some connection point. When
LEAK DETECT tests a loop with leakage the loop mA

signal will be affected.
HART 250Ω - turn on the 250Ω resistor if you are powering up
a HART transmitter. This provides the loop load required for
HART communication.

EXIT MENU - exits this menu immediately and saves any
changes. Menu will automatically exit after 15 seconds of
inactivity.

PWRM

5 6

HART

00.51 mA LEAK

12.523 mA

311.2 °F

Pt 100 a=3850

(Enlarged Display)

 

PWRM

HART

5 6

00.51 mA LEAK

12.523 mA

311.2

°F

+ IN - REF -OUT+

Typical
2-Wire

Transmitter

Pt 100 α=3850

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Using Ground Leak Detection
mA OUT, % OUT (Percent of 4 to 20 mA)

Find current leaks in loops caused by ground faults, moisture or
corrosion. The 525Plus simultaneously supplies power to a 2
Wire Transmitter (or loop with a transmitter) while displaying the
4 to 20 mA output and the amount of current leaking in the loop.

1) Move the power switch

EZ-DIAL knob to get into the Menu. Turn the knob
through the settings and press the knob to make your selec­tion. Select mA for the FUNCTION and PWR MEAS for
the MODE. Choose either mA or %.

2) Turn the knob

e until the menu below appears.

> EXIT (2/3)
LEAK DETECT OFF ON

w to READ then Double Click the

e to scroll

mA DIAGNOSTIC

3) Turn the knob

knob to make your selection. Turn on the LEAK DETECT.

4) Connect the red source lead from the mA (+) jack of the

525Plus to the plus (+) input of the device and the black
source lead from the mA (-) to the minus (-).

The PIE 525Plus supplies a
nominal 24 volts DC at 24 mA
to the 2 Wire Transmitter or
loop. The current passed by
the transmitter will be
accurately displayed by the
525Plus along with an
indication of leakage current
at the top of the display. If
there is an uncontrolled loop
caused by a transmitter with upscale burnout and a sensor that
is burned out or missing, or a short in the loop wiring, the
525Plus will display "OVER RANGE”

e to scroll through the settings and press the

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Typical Error Conditions

5 6

HART

PWRM LEAK

00.51 mA

12.506 mA

The PIE 525Plus is supplying the loop voltage. A calibrated
transmitter is limiting the loop current to 12.00 mA. An
additional 0.51 mA is not controlled by the transmitter and
is leaking somewhere in the loop.

5 6

HART

PWRM

OVER RANGE

mA

The PIE 525Plus is supplying the loop voltage. There is a

control loop error. This may be a transmitter (set for

upscale burnout) with a bad or missing sensor, or a short

in the loop. The red ERROR LED will also flash.

Note: Many loops with installed transmitters will normally
indicate 0.01 to 0.02 mA leakage without significant control
problem. Unstable readings may indicate loose connections or
the presence of moisture.

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PIE 525Plus Specifications

Unless otherwise indicated all specifications (except Cold

Junction) are rated from a nominal 23 °C, 70 % RH

General

Operating
Temperature Range

Storage Temp. Range

Temperature
Drift

Relative Humidity
Range

Rejection Normal Mode: 50/60 Hz, 50 dB

Size

Weight 12.1 ounces, 0.34 kg with boot & batteries

Batteries Four “AA” Alkaline 1.5V (LR6)

Optional NiMh

Rechargeable
battery kit

Battery Life 25 Hours Thermocouple/RTD, 8 hours mA

Low Battery Low battery indication with nominal 1 hour

Protection against
misconnection

Display High contrast graphic liquid crystal display.

for 1 year from calibration

-20 to 60 °C (-5 to 140 °F)

-30 to 60 °C (-22 to 140 °F)

± 0.01% of span outside of 23°C ±10 °C (73°C
±18 °F)

10 % ≤RH ≤90 % (0 to 35 °C), Non-condensing

10 % ≤RH≤ 70 % (35 to 60 °C), Non-condensing

Common Mode: 50/60 Hz, 120 dB

5.63 x 3.00 x 1.60 in, 143 x 76 x 41mm

120 VAC for North America Only; charger,

four

NiMh batteries, AC & DC cords

[Part # 020-0103]

of operation left

Over-voltage protection to 60 vrms (rated
for 30 seconds)

Red LED indicates OVERLOAD or out of
range conditions

LED backlighting for use in low lit areas.

(L x W x H)

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PIE 525Plus Specifications

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

mA 2-Wire Transmitter Simulation

Accuracy Same as Source/Power & Measure

Voltage burden ≤ 2V at 20 mA

Overload/

Current limit
protection

Loop voltage
limits

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

1200 Ω at 20 mA
950 Ω with Hart Resistor or leak detection running

24 mA nominal

2 to 60 VDC (fuse-less protected from
reverse polarity connections)

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PIE 525Plus Specifications

Voltage Source

Ranges & Resolution

Accuracy ±(0.008% of Setting + 0.006 mV)

Source Current

Output Impedance

RMS Noise ≤ ± 0.0005 mV from 0.1 to 10 Hz

Short Circuit Duration Infinite

Voltage Read

Range and Resolution Same as Voltage Source

Accuracy ±(0.008% of Reading + 0.006 mV)

Input resistance ≥ 10 MΩ

Thermocouple Source

Accuracy ±(0.008% of Setting + 0.006 mV)

Cold Junction
Compensation

Output Impedance

Source Current > 10 mA (drives 80 mV into 10 Ohms)

RMS Noise ≤ ± 0.0005 mV from 0.1 to 10 Hz

Thermocouple Read

Accuracy ±(0.008% of Reading + 0.006 mV)

Cold Junction
Compensation

Input Impedance

Open
Thermocouple

-13.000 to 80.000 mV & -13.0000 to 80.0000 mV

≥ 10 mA

< 0.3 Ohm

± 0.09°F (±0.05 °C) - Thermistor traceable to
NIST for 11 years

< 0.3 Ohms

± 0.09°F (±0.05 °C) - Thermistor traceable to
NIST for 11 years

> 10 Megohms

Threshold: 15,000 Ohms nominal
Pulse: < 10 microamp pulse for 400 milliseconds

Page 40

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PIE 525Plus Specifications

RTD and Ohms Source

3 Wire & 4 Wire
Accuracy

From 1 to 10.2 mA
External Excitation
Current

Below 1 mA of

External Excitation
Current

2 Wire Accuracy*

Resistance Ranges

RMS Noise

Allowable
Excitation
Current Range

Pulsed Excitation
Current Compatibility

RTD and Ohms Read

Resistance Ranges Same as RTD and Ohms Source

3 Wire & 4 Wire
Accuracy

2 Wire Accuracy*

Excitation
Current

* 2 Wire specifications do not include resistance of the lead wires

±(0.015% of Setting + 0.05 Ohms)

Add ( ) to Accuracy

Add 0.1 Ohms to 3 Wire & 4 Wire Accuracy

400 Ohm Range: 0.00 to 401.00 & 0.000 to 401.000
4000 Ohm Range: 0.0 to 4010.0 & 0.00 to 4010.00

400 Ohm Range: ≤ ± 0.005 Ohms from 0.1
to 10 Hz

4000 Ohm Range: ≤ ± 0.05 Ohms from 0.1
to 10 Hz

400 Ohm Range:10.2 mA max; steady or pulsed/

intermittent

4000 Ohms Range: 1 mA max; steady or pulsed

DC to 0.01 second pulse width

±(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)

0.025 mV

mA Excitation Current

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Thermocouple Ranges & Accuracies

Table based on Accuracy:

≤ ± (0.008 % of Reading + 0.006 mV)

Note: Doesn’t include cold junction error of ±0.05°C

T/C Degrees C

Range

J -200.00 to -150.00 ±0.25° -346.00 to -238.00 ±0.55°

-150.00 to -50.00 ±0.17° -238.00 to -58.00 ±0.35°

-50.00 to 300.00 ±0.13° -58.00 to 572.00 ±0.24°

300.00 to 850.00 ±0.15° 572.00 to 1562.00 ±0.28°

850.00 to 1200.00 ±0.20° 1562.00 to 2192.00 ±0.36°

K -230.00 to -100.00 ±0.70° -382.00 to -148.00 ±1.26°

-100.00 to 600.00 ±0.19° -148.00 to 1112.00 ±0.34°

600.00 to 1000.00 ±0.24° 1112.00 to 1832.00 ±0.43°

1000.00 to 1371.1 ±0.31° 1832.00 to 2500.00 ±0.55°

T -260.00 to -240.00 ±1.66° -436.00 to -400.00 ±2.98°

-240.00 to -210.00 ±0.60° -400.00 to -346.00 ±1.07°

-210.00 to -100.00 ±0.41° -346.00 to -148.00 ±0.74°

-100.00 to 50.00 ±0.18° -148.00 to 122.00 ±0.33°

50.00 to 400.00 ±0.14° 122.00 to 752.00 ±0.24°

°C Degrees F

Range

°F

E -240.00 to -225.00 ±0.51° -400.00 to -373.00 ±0.92°

-225.00 to -100.00 ±0.27° -373.00 to -148.00 ±0.48°

-100.00 to 750.00 ±0.13° -148.00 to 1382.00 ±0.24°

750.00 to 1000.00 ±0.16° 1382.00 to 1832.00 ±0.29°

Page 42

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Thermocouple Ranges & Accuracies

Table based on Accuracy:

≤ ± (0.008 % of Reading + 0.006 mV)

Note: Doesn’t include cold junction error of ±0.05°C

T/C Degrees C

Range

R -18.30 to 250.00 ±1.26° -1.00 to 482.00 ±2.27°

250.00 to 750.00 ±0.64° 482.00 to 1382.00 ±1.14°

750.00 to 1600.00 ±0.54° 1382.00 to 2192.00 ±0.97°

1600.00 to 1767.80 ±0.63° 2192.00 to 3214.00 ±1.13°

S -18.30 to 150.00 ±1.22° -1.00 to 302.00 ±2.20°

150.00 to 500.00 ±0.72° 302.00 to 932.00 ±1.30°

500.00 to 1650.00 ±0.63° 932.00 to 3002.00 ±1.14°

1650.00 to 1767.80 ±0.73° 3002.00 to 3214.00 ±1.31°

B 315.60 to 550.00 ±1.88° 600.00 to 1022.00 ±3.39°

550.00 to 900.00 ±1.03° 1022.00 to 1652.00 ±1.86°

900.00 to 1150.00 ±0.72° 1652.00 to 2102.00 ±1.30°

1150.00 to 1820.00 ±0.63° 2102.00 to 3308.00 ±1.14°

-230.00 to -100.00 ±1.10° -382.00 to -148.00 ±1.98°

N

-100.00 to 0.00 ±0.30° -148.00 to 32.00 ±0.53°

0.00 to 1100.00 ±0.24° 32.00 to 2012.00 ±0.44°

1100.00 to 1300.00 ±0.27° 2012.00 to 2372.00 ±0.49°

°C Degrees F

Range

°F

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Thermocouple Ranges & Accuracies

Table based on Accuracy:

≤ ± (0.008 % of Reading + 0.006 mV)

Note: Doesn’t include cold junction error of ±0.05°C

T/C Degrees C

Range

100.00 to 450.00 ±1.14° 212.00 to 842.00 ±2.05°

G

(W)

440.00 to 1700.00 ±0.44° 842.00 to 3092.00 ±0.79°

1700.00 to 2000.00 ±0.54° 3092.00 to 3632.00 ±0.97°

2000.00 to 2320.00 ±0.73° 3632.00 to 4208.00 ±1.32°

C

-

1.10 to 1150.00±0.44° 30.00 to 2102.00 ±0.80°

(W5)

1150.00 to 1750.00 ±0.61° 2102.00 to 3182.00 ±1.09°

1750.00 to 2050.00 ±0.74° 3182.00 to 3722.00 ±1.33°

2050.00 to 2320.00 ±0.99° 3722.00 to 4208.00

D

-1.00 to 150.00 ±0.63° 30.00 to 302.00 ±1.13°

(W3)

150.00 to 1200.00 ±0.41° 302.00 to 2192.00 ±0.73°

1200.00 to 1700.00 ±0.51° 2192.00 to 3092.00 ±0.92°

1700.00 to 2320.00 ±0.97° 3092.00 to 4208.00 ±1.75°

P

0.00 to 950.00 ±0.23° 32.00 to 1742.00 ±0.41°

950.00 to 1395.00 ±0.34° 1742.00 to 2543.00 ±0.61°

°C Degrees F

Range

±

1.79°

°F

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Thermocouple Ranges & Accuracies

Table based on Accuracy:

≤ ± (0.008 % of Reading + 0.006 mV)

Note: Doesn’t include cold junction error of ±0.05°C

DIN Wire

T/C Degrees C

Range

-200.00 to -100.00 ±0.21°-328.00 to -148.00 ±0.38°

L

J-DIN

-100.00 to 350.00 ±0.13° -148.00 to 662.00 ±0.24°

350.00 to 900.00 ±0.15° 662.00 to 1652.00 ±0.27°

-200.00 to -150.00 ±0.37° -328.00 to -238.00 ±0.66°

U

T-DIN

-150.00 to 100.00 ±0.22° -238.00 to 212.00 ±0.40°

100.00 to 600.00 ±0.15° 212.00 to 1112.00 ±0.28°

°C Degrees F

Range

°F

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RTD Ranges & Accuracies

Table based on 3 & 4 Wire RTD (ITS-90) Accuracy*:

Type

Pt 100 Ohm

DIN/IEC/JIS

a

Pt 10 Ohm

DIN/IEC/1989

a

Pt 50 Ohm

DIN/IEC/1989

a

Pt 200 Ohm

DIN/IEC/1989

a

Pt 500 Ohm

DIN/IEC/1989

a

Pt 1000

DIN/IEC/1989

a

*Read based on 1.0 mA of

fixed excitation current

≤ ± (0.015 % of Reading +0.05 Ohms)

RTD

1989

=1.3850

=1.3850

=1.3850

=1.3850

=1.3850

Ohm

=1.3850

Degrees C

Range

-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

±0.13°
±0.24°
±0.34°
±0.37°
±1.24°
±1.44°
±1.54°
±1.74°
±1.91°
±0.34°
±0.44°
±0.54°
±0.08°
±0.14°
±0.19°
±0.24°
±0.29°
±0.08°
±0.14°
±0.19°
±0.24°
±0.29°
±0.08°
±0.14°
±0.19°
±0.22°

Page 46

Degrees F

°C

-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

Range

°F

±0.24°
±0.44°
±0.61°
±0.67°
±2.24°
±2.59°
±2.77°
±3.14°
±3.44°
±0.62°
±0.80°
±0.98°
±0.14°
±0.24°
±0.34°
±0.44°
±0.52°
±0.14°
±0.24°
±0.34°
±0.44°
±0.52°
±0.14°
±0.24°
±0.34°
±0.39°

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RTD Ranges & Accuracies

Table based on 3 & 4 Wire RTD (ITS-90) Accuracy*:

Type

Pt 100

(Burns)

a

Pt 100

(Old JIS

1981)

a

Pt 100

(US Lab)

a

≤ ± (0.015 % of Reading +0.05 Ohms)

RTD

Ohm

=1.3902

Ohm

=1.3916

Ohm

=1.3926

Degrees C

Range

-200.00 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

±0.14°
±0.24°
±0.31°

±0.13°
±0.19°
±0.24°
±0.31°

±0.13°
±0.19°
±0.24°
±0.30°
±0.37°

Degrees F

°C

-328.00 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

Range

°F

±0.26°
±0.44°
±0.56°

±0.24°
±0.34°
±0.44°
±0.56°

±0.24°
±0.34°
±0.44°
±0.54°
±0.66°

Copper 10

Ohm

(Minco)

a

=1.4274

Copper 50

Ohm

a

=1.4280

Ni 120
Ohm

a=1.6720

*Read based on 1.0 mA of

fixed excitation current

-200.00 to -150.00

-150.00 to 90.00

90.00 to 260.00

-50.00 to 150.00 ±0.29° -58.00 to 302.00 ±0.52°

-80.00 to 260.00 ±0.10° -112.00 to 500.00 ±0.17°

(Pure)

±1.24°
±1.34°
±1.36°

Page 47

-328.00 to -238.00

-238.00 to 194.00

194.00 to 500.00

±2.24°
±2.42°
±2.44°

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Guaranteed compatible with smart

transmitters, multichannel recorders as

well as PLC and DCS input cards.

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Standard 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.

Optional Repair/Replacement Warranty

Under our Repair/Replacement Warranty (RP-WAR-B), our
equipment is warranted against ANY damage or malfunction
that may cause the unit to fail for a period of three (3) years from
the date of shipment.

This warranty is limited to one complete replacement against
any damage or malfunction during the warranty period. If
replaced, the new calibrator will carry our Standard Warranty for
the remainder of the three (3) years or a minimum of one (1)
year from the date of shipment.

Additional Information

PIE Calibrators are designed, assembled and calibrated in
the USA.
NIST and includes a Certificate of Calibration. Test Data is
available for an additional charge.

interval of one year. Contact your local representative for
recalibration and repair services.

This product is calibrated on equipment traceable to

Practical Instrument Electronics recommends a calibration

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Practical Instrument Electronics

Copyright © 2017 All rights reserved

525Plus-9002 - Rev A 21 December 2017

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