Model 522
Thermocouple Calibrator
Practical Instrument Electronics
Direct Temperature Input/Output
Read or Source in °C or °F for your T/C type
8 Standard T/C Types Available
Types J, K, E, T, R, S, B, N and mV
Custom types and ranges are available
Cold Junction Compensated
Accurate to ±0.2 °C (±0.4 °F) with 0.1° Resolution
Millivolt accuracy of ±(0.008 % + 0.006 mV)
EZ-Dial Knob
Easily adjust output by 0.1 °
Pressing down and turning will select a faster dialing speed
EZ-Check Switch
User selectable EZ-Check for 0 % and 100 % span
adjustment
Store new EZ-Check values by pressing the EZ-Dial knob
Recall stored minimum and maximum readings
Uses a standard 9V Alkaline Battery
Superior battery life of 45 hours under typical continuous
usage
Easy access to battery compartment
Lightweight and Rugged with a Solid Feel
Small, tough and protected to 60 V
Datasheet
Features
APPROVED!
Description
The Practical Instrument Electronics Model 522 is a complete source/read thermocouple calibrator providing direct temperature input
to all types of instruments such as transmitters, recorders, controllers, alarms, data acquisition, and computer systems. The Model
522 also reads thermocouple outputs and displays temperature, eliminating the need for cumbersome books of conversion tables.
The Model 522 is equipped with a miniature T/C connector and slotted screws to connect to common thermocouple equipment or
bare extension wire. Select from 8 T/C types to source/read in °C or °F with 0.1 ° resolution. Or, select mV for direct millivolt
source/read capability. The Model 522 is internally cold-junction compensated for accuracy in any operating environment.
Use the EZ-Check Switch to quickly switch between three stored temperature/mV outputs. It’s easy to customize these values to
your application. In read mode, the EZ-Check Switch recalls minimum and maximum readings. Store/Clear memory with a press of
the EZ-Dial Knob.
The Practical Instrument Electronics Model 522 offers the highest performance and functions in its class by exceeding the accuracy
and functions of many higher priced thermocouple calibrators. It is a low cost solution for checkout and calibration of all
thermocouple instruments in the field, shop or control room. Contact Practical Instruments Electronics for custom thermocouple
curves, ranges, or special requirements not provided by the Model 522.
Practical Instrument Electronics, Inc. Copyright 2003. All rights reserved.
522-9001 2/28/05
1-4
Model 522 Datasheet
Specifications
General Specifications:
Unless otherwise indicated all specifications are rated from a nominal 23 °C, 70 % RH for 1 year from calibration.
Temperature Range -25 to 60 °C (-10 to 140 °F)
Relative Humidity Range 10 % ≤RH ≤90 % (0 to 35 °C), Non-condensing
10 % ≤RH≤ 70 % (35 to 60 °C), Non-condensing
Overall Size 4.9 X 3.15 X 1.82 inches (125.5 X 80 X 46.2 mm)
Overall Weight (including 9V battery) 7.2 oz (204 grams)
Battery 9V Alkaline provides 45 hours of continuous use
Miscellaneous Low battery indication with nominal 1 hour of operation left
Overload protected to 60 volts for 30 seconds or less
High-contrast graphic liquid crystal display with 0.357” (9.07 mm) high digits
Accuracy:
Millivolt Accuracy ±(0.008 % of mV Setting + 0.006 mV)
Temperature Coefficient of mV Source 50 ppm/°C of output range
Cold Junction Calibration Accuracy ±0.1 °C (0.2 °F)
Cold Junction Sensor Temperature Coefficient ±0.025 °/° in ambient temperature (°C or °F)
General Temperature Accuracy ±(0.008 % of mV setting + 0.006 mV) ± 0.1 °C (0.2 °F)
Resolution 0.1 °C or 0.1 °F
Source Thermocouple Specifications:
Output Range -13.000 to +80.000 mV
Output Noise ±5 µV pp from 0.1 Hz to 10 Hz
Output Impedance
Source Current < 8 mA
Read Thermocouple Specifications:
Input Noise < ±1 LSD from 0.1 Hz to 10 Hz
Input Impedance
Open T/C Test Pulse < 1 uA for 300 ms
Open T/C Response Time < 3 seconds
Open T/C Threshold
Available Options:
Carrying Case Part Number: 020-0201
0.2 Ω (200 nV/uA)
> 1 MΩ
10 kΩ nominal
Practical Instrument Electronics, Inc. Copyright 2003. All rights reserved.
522-9001 2/28/05
2-4
Model 522 Datasheet
-245 to 1372 °C
Other Products Available:
RTD Source (Single Type/1° resolution) Model 510
RTD Source (7 Types, Ω/0.1° resolution)
Pt100: α=1.3850, 1.3902, 1.3916, 1.3926
Cu10: α=1.427
Ni110: α=1.530
Ni120: α=1.672
RTD Calibrator (Source/Read 7 Types, Ω /0.1° resolution) Model 512
T/C Source (Single Type/1° resolution) Model 520
T/C Source (8 Types, mV/0.1° resolution)
B, E, J, K, N, R, S, T, mV
4-20 Milliamp Loop Calibrator Model 530
4-20 Milliamp Loop Calibrator with Diagnostic Model 532
4-20/10-50 Dual Range Loop Calibrator Model 535
Temperature Accuracy
The following charts give worst-case temperature accuracy based on stated millivolt accuracy of ±(0.008 % of reading + 0.006mV).
Temperature is uncompensated on the horizontal axis, referenced to 0 °C. Cold Junction calibration accuracy of 0.1 °C is not included
in the temperature error.
Model 511
Model 521
TYPE B
594 to 1820 °C
1.2
1
0.8
0.6
0.4
Error °C
0.2
0
500
700
900
1100
1300
1500
1700
Temperature °C
1900
1.4
1.2
1
0.8
0.6
Error °C
0.4
0.2
0
-400
-260 to 1000 °C
0
-200
TYPE E
200
400
Temperature °C
0.4
0.3
0.2
Error °C
0.1
0
-400
600
800
1000
1200
-200
TYPE J
-210 to 1200 °C
0
200
400
Temperature °C
600
800
1000
1200
1400
TYPE K
1.2
1
0.8
0.6
0.4
Error °C
0.2
0
0
200
400
600
-400
-200
Temperature °C
800
1000
1200
1400
1600
1.2
1
0.8
0.6
0.4
Error °C
0.2
0
-400
-200
TYPE N
-229 to 1300 °C
0
200
400
Temperature °C
1.2
1
0.8
0.6
0.4
Error °C
0.2
0
0
600
800
1000
1200
1400
200
TYPE R
24 to 1768 °C
400
600
Temperature °C
800
1000
1200
1400
1600
1800
2000
TYPE S
21 to 1768 °C
TYPE T
-251 to 400 °C
Practical Instrument Electronics, Inc. Copyright 2003. All rights reserved.
1.2
1
0.8
0.6
0.4
Error °C
0.2
0
0
200
400
600
800
1000
1200
1400
1600
1800
Temperature °C
2000
1.2
1
0.8
0.6
0.4
Error °C
0.2
0
-300
-200
-100
Temperature °C
0
100
200
300
400
500
522-9001 2/28/05
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Model 522 Datasheet
Warranty
Our equipment is guaranteed against defective material and workmanship (excluding batteries) for a period of three years from the
date of shipment. Claims under guarantee can be made by returning the equipment prepaid to our factory. The equipment will be
repaired, replaced or adjusted at our option. The liability of Practical Instrument Electronics (PIE) is restricted to that given under our
guarantee. No responsibility is accepted for damage, loss or other expense incurred through sale or use of our equipment. Under no
condition shall Practical Instrument Electronics, Inc. be liable for any special, incidental or consequential damage.
Your Local PIE Representative
Practical Instrument Electronics, Inc. Copyright 2003. All rights reserved.
522-9001 2/28/05
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