Practical Instrument Electronics 521 - Manual (Page 3)

Model 520/521
Operating Instructions
Connection Diagram
Two Wire Connection to Transmitter
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
Size 4.9 X 3.15 X 1.82 inches (125.5 X 80 X 46.2 mm)
Weight 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 60V for 30 seconds or less
High contrast graphic liquid crystal display with 0.357” (9.07 mm) high digits
Source Thermocouple Specifications (ITS-90 Curves):
Millivolt Uncertainty
Temperature Coefficient of mV Source
Output Noise
Output Impedance ±(0.015% of mV Setting + 0.009 mV)
±0.005mV/°C Ambient
±5µVpp from 0.1 Hz to 10 Hz
0.2
Ω
Cold Junction Uncertainty
Cold Junction Sensor Temperature
Coefficient ±0.25°C (0.5°F)
±0.05°/° in ambient temperature (°C or °F)
General Temperature Accuracy ±(0.015% of mV setting + 0.009mV) ± 0.25°C (0.5°F)
Output Dial Adjustment Resolution 0.1°C or °F for Model 521/1°C or °F for Model 520
Span -13.000 - 80.000 mV
841 Holt Road #1 • Webster, NY 14580 Tel: 585-872-9350 • Fax: 585-872-2638 [email protected] • http://www.piecal.com/
Practical Instrument Electronics, Inc. Copyright  2003. All rights reserved. 520/521-9002 2/25/04 3-4