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
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