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
Automated Thermocouple & RTD Calibrator
• Easy to use
With the PIE 525B you can check
and calibrate all your thermocouple and RTD
instruments and measure temperature sensors.
• Take it into the shop, plant or field
Carry it without worry - it comes protected with a rubber boot and
rugged, low profile switches. Easy to operate even in the dark areas of
the plant with the backlit display.
•
Calibrate thermocouple instruments to 0.1 & 0.01 °F & °C
The PIE 525B 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 525B
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. For RTDs the fixed or pulsed sensor
current is measured by the calibrator.
PIE 525B
• 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
Trouble shoot sensor connections and find broken wires or corroded
connections. The PIE 525B measures probes to 0.1 or 0.01 °C or °F.
Secondary display shows the millivolt or resistance value corresponding to the sensor
temperature as well as the junction temperature measured by the calibrator. Trouble
shoot sensor connections and find broken wires with patented technology. Connect your two, three or four wire RTDs and
the PIE 525B automatically detects the connections.
Actual Size
• Calibration Lab Accurate & Stable
The internal cold junction thermistor is accurate to ±0.05°C and is traceable to NIST. The sensor is thermally bonded to an
isothermal mass which includes brass blocks with screw terminals for connection of bare thermocouple wires along with a
miniature thermocouple connector for fast connections. The circuitry uses an extremely stable voltage reference and low drift
components which make the PIE 525B more accurate than most other handheld and benchtop thermocouple calibrators.
• Perform Heat Treating Uniformity Surveys and System Accuracy Tests
The PIE 525B meets or exceeds the requirement of AMS 2750 as a Field Test Instrument.
• Evolutionary design
PIECAL Calibrators are designed and built by members of the same team that designed and built the calibrators manufactured
by Fluke* under the Altek* label. The PIE 525B improves upon other brands by including a rubber boot, tilt stand, backlit
display with larger digits, rugged switches & a battery compartment for fast battery changes.
* PIECAL Calibrators are not manufactured or distributed by Fluke Corp or Altek Industries Inc, manufacturers of Altek Calibrators.
Thermocouple Connections
RTD Connections
Simulating or reading thermocouples requires the use of
thermocouple or extension grade thermocouple wire.
Plug thermocouple wires into the miniature thermocouple jack
or place bare thermocouple wires onto the brass block under
the screws.
The PIE 525B 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.
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 525B simulates the (+) RTD
from jacks 1 & 4 and the (-) RTD from jacks 2 & 3.
When reading an RTD sensor the PIE 525B uses patented
circuitry to automatically detects if 2, 3 or 4 wires are connected.
This is helpful to troubleshoot sensor connections.
Flip out stand for bench use
PIE 525B Specifications
Unless otherwise indicated all specifications (except Cold Junction) are rated from a nominal 23 °C, 70 % RH for 1 year from calibration
General
Operating Temperature
Range
Storage Temperature Range -30 to 60 °C (-22 to 140 °F)
Temperature effect ≤ ±50 ppm/°C;
Relative Humidity Range 10 % ≤RH ≤90 % (0 to 35 °C), Non-condensing
Normal Mode Rejection 50/60 Hz, 50 dB
Common Mode Rejection 50/60 Hz, 120 dB
Size 5.63 x 3.00 x 1.60 in, 143 x 76 x 41mm (L x W x H)
Weight 12.1 ounces, 0.34 kg with boot & batteries
Batteries Four “AA” Alkaline 1.5V (LR6)
Optional NiMh
battery kit
Battery Life 50 Hours
Low Battery Low battery indication with nominal 1 hour of
Protection against
misconnection
Display High contrast graphic liquid crystal display. LED
Voltage Source
Ranges and Resolution -13.000 to 80.000 mV & -13.0000 to 80.0000 mV
Accuracy ±(0.008% of Setting + 0.006 mV)
Source Current
Output Impedance < 0.3 Ohm
RMS Noise ≤ ± 0.0005 mV from 0.1 to 10 Hz
Short Circuit Duration Infinite
Rechargeable
-20 to 60 °C (-5 to 140 °F)
Cold Junction Sensor ≤ ±25 ppm/°C
10 % ≤RH≤ 70 % (35 to 60 °C), Non-condensing
120 VAC for North America Only; charger, four
NiMh batteries, AC & DC cords [Part # 020-0103]
operation left
Over-voltage protection to 60 vrms (rated for 30
seconds)
Red LED indicates OVERLOAD or out of range
conditions
backlighting for use in low lit areas.
≥ 10 mA
Thermocouple Source
Accuracy ±(0.008% of Setting + 0.006 mV)
Cold Junction
Compensation
Output Impedance < 0.3 Ohms
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 Threshold: 10,000 Ohms nominal
RTD and Ohms Source
3 Wire & 4 Wire Accuracy
From 1 to 10.2 mA
External Excitation Current
B e l o w 1 m A o f E x t e r n a l
Excitation Current
2 Wire Accuracy
Resistance Ranges 400 Ohm Range: 0.00 to 401.00 & 0.000 to 401.000
RMS Noise
Allowable Excitation
Current Range
Pulsed Excitation
Current Compatibility
± 0.09°F (±0.05 °C) - Thermistor traceable to NIST for 11
years
± 0.09°F (±0.05 °C) - Thermistor traceable to NIST for 11
years
> 10 Megohms
Pulse: < 10 microamp pulse for 300 milliseconds
±(0.015% of Setting + 0.05 Ohms)
Add ( ) to 90 Days & 1 Year Accuracy
Add 0.1 Ohms to 3 Wire & 4 Wire Accuracy
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/intermittent
DC to 0.01 second pulse width
0.025 mV
mA Excitation Current
Voltage Read
Range and Resolution Same as Voltage Source
Accuracy ±(0.008% of Reading + 0.006 mV)
Input resistance ≥ 10 MΩ
RTD and Ohms Read
Resistance Ranges Same as RTD and Ohms Source
Accuracy ±(0.015% of Reading + 0.05 Ohms)
Excitation Current
0.9 mA to 401 Ohms, 0.4 mA to 4010 Ohms (nominal)
Thermocouple Ranges & Accuracies
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° +Iron
-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° + Chromel®
-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° +Copper
-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°
E -240.00 to -225.00 ±0.51° -400.00 to -373.00 ±0.92° +Chromel
-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°
R -18.30 to 250.00 ±1.26° -1.00 to 482.00 ±2.27° +Pt/13Rh
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° +Pt/10Rh
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°
°C Degrees F
Range
Table based on Accuracy:
≤ ± (0.008 % of Reading + 0.006 mV)
°F T/C
Material
-Connstantan
-Alumel®
-Constantan
-Constantan
-Platinum
-Platinum
T/C Degrees C
Range
N -230.00 to -100.00 ±1.10° -382.00 to -148.00 ±1.98° +Nicrosil
-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°
G
100.00 to 450.00 ±1.14° 212.00 to 842.00 ±2.05° +Tungsten
(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/Re
(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 ±1.79°
D
-1.00 to 150.00 ±0.63° 30.00 to 302.00 ±1.13° +W3/Re
(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°
-200.00 to -100.00 ±0.21° -328.00 to -148.00 ±0.38° +Iron
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° +Copper
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
DIN Wire
°F T/C
Material
-Nisil
-W26/Re
-W26/Re
-W25/Re
+Pd55/Pt31/
Au14
-Au65/Pd35
-Constantan
-Constantan
B 315.60 to 550.00 ±1.88° 600.00 to 1022.00 ±3.39° +Pt/30Rh
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°
-Pt/6Rh
RTD Ranges & Accuracies
°C
00.21mA FIXED
289.27 Ω
525.00
01.15mA PULSE
289.27 Ω
525.00
°C
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]
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
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)
-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
°C
±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°
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
°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°
RTD
Type
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)
Alpha Degrees C
Range
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 -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
±0.14°
±0.24°
±0.31°
±0.13°
±0.19°
±0.24°
±0.31°
±0.13°
±0.19°
±0.24°
±0.30°
±0.37°
±1.24°
±1.34°
±1.36°
±0.29°
±0.10°
Degrees F
Range
-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
-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
±0.26°
±0.44°
±0.56°
±0.24°
±0.34°
±0.44°
±0.56°
±0.24°
±0.34°
±0.44°
±0.54°
±0.66°
±2.24°
±2.42°
±2.44°
±0.52°
±0.17°
Troublshooting 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 525B 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.
Disconnect all sensor wires from the devices to be calibrated
and connect the PIE 525B 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.
Instrument with RTD Input
Controller
Temperature Transmitter
Temperature Indicator
Temperature Trip or Alarm
+
-
01.15mA PULSE
241
3
289.27 Ω
525.00
Pt 100 α=3850
LO
Automated RTD &
Thermocouple Calibrator
Pt 10, 50, 100, 200, 500 & 1000Ω
Cu 10 & 50Ω · Ni 120Ω
J · T · E · K · R · S · B · N · G · C · D · L· U · P · mV
HI
SET
LO
OVERLOAD
MAX
READ
MIN
°c
SOURCE
OFF
READ
Double Click
Menu
Push & Turn
for
Fast Dialing
Push & Hold
to
Store/Step
Measure and troubleshoot RTD sensors
Troubleshooting an RTD Sensor
When measuring an RTD sensor the PIE 525B uses patented
circuitry to automatically detect 2, 3 & 4 wire connections. This
may also be used as a troubleshooting tool to determine if any
wires from the sensor are broken. Here is an example of the
525B reading a sensor with all 4 wire connected.
Here is an example where connections are made to a 4 wire
sensor and the PIE 525B 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 525B.
Guaranteed compatible with smart transmitters,
multichannel recorders as well as PLC and DCS input cards.
PIE 525B in Deluxe Carrying Case.
Hangs from your neck freeing up both hands for calibration work.
Accessories
Practical Instrument Electronics
82 East Main Street Suite 3.14 • Webster, NY 14580
Tel: 585.872.9350 • Fax: 585.872.2638
sales@piecal.com • www.piecal.com
Copyright © 2015 All rights reserved
525B-9001 - Rev B 11 April 2015
Included:
Four “AA” Alkaline batteries, Certificate of Calibration Card
Rubber Boot Part No. 020-0213
Deluxe Hands Free Carrying Case Part No. 020-0211
Evolution mA/V Test Leads Part No. 020-0207
1 Red & 1 Black Lead
Evolution RTD Wire Kit Part No. 020-0208
2 Red & 2 Black Leads with Banana Plugs & Spade Lugs
Optional:
Certificate of Calibration with Test Data Part No. Certified Test Data 2
Ni-MH 1 Hour Charger with 4 Ni-MH AA Batteries Part No. 020-0103
(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.
with Banana Plugs & Alligator Clips
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.
Additional Information
PIE Calibrators are manufactured in the USA.
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.
This product is
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