Manuals / Sierra / Marine Equipment / Marine Sanitation System

Sierra 840, 860, 830 instruction manual Conversion of Flow Rate to Other T and P Conditions

Models: 840 830 860

1 74
Download 74 pages 60.88 Kb
Page 55
Image 55

Series 830/840/860 Instruction Manual

Appendix A

 

 

Appendix A Conversion Formulas and Gas Tables

Conversion of Flow Rate to Other T and P Conditions

The flow rate of your transducer is referenced to certain “standard” conditions of temperature and pressure. Unless otherwise specified in your order, these standard conditions are 21°C (70°F) and 760 mm of mercury (1 atmosphere). If you wish to convert to other “stan- dard” conditions or to find the “actual” conditions in the pipe where your instrument is installed, use the following relationship:

P1 T2

Q2 =

Q1

(1)

P2 T1

( )1 = The standard conditions under which your instrument was calibrated,

( ) 2 = The new standard conditions or the actual temperature and pressure conditions in the pipe,

Q1 = The gas mass flow rate referenced to the calibrated standard conditions (sccm or slm),

Q2 = The gas mass flow rate referenced to the new standard or actual conditions (sccm or slm—“S” means “standard,” accm or alm—“A” means “actual”),

P = Absolute pressure (kg/cm2 or psia), and

T = Absolute temperature (°K or °R) (°K = °C + 273, °R = °F + 460).

Example 1: Changing “Standard” Conditions

If your transducer has a flow rate reading of 10.00 slm and was cali- brated at standard conditions of 70°F (21°C) and 1 atmosphere (14.7 psia), and if you wish to convert this reading to standard conditions of 32°F (0°C) and 1 atmosphere, then you would use Equation (1) as fol- lows:

14.7460 + 32

Q2 =

(10.0) = 9.28 slm

14.7460 + 70

The flow rate referenced to 0°C will be approximately 7% lower than when referenced to standard conditions of 21°C.

Example 2: Finding the “Actual” Flow Rate

If the flow rate and calibrated standard conditions are as given in Example 1 and you wish to find the actual flow rate at 100°F and

30 psig, then you would use Equation (1) as follows:

IM-83/84/86-H

A-1

Page 54 Page 56
Page 55
Image 55
Sierra 840, 860, 830 Conversion of Flow Rate to Other T and P Conditions, Example 1 Changing Standard Conditions
Page 54 Page 56

840, 830, 860 specifications

The Sierra 860, 830, and 840 are a series of rugged outdoor laptops designed for professionals who require reliable and powerful computing solutions in challenging environments. These laptops combine advanced technologies and robust construction to meet the demands of various fields, including engineering, military, field services, and outdoor research.

One of the standout features of the Sierra series is its rugged design. Constructed with military-grade materials, these laptops are highly resistant to shock, vibration, and extreme temperatures. They have undergone rigorous testing according to MIL-STD-810G standards, which ensures they can withstand harsh conditions whether in the field or during transport. Additionally, the IP65 rating guarantees protection against dust and water exposure, making them invaluable for professionals working in inclement weather or dusty environments.

The Sierra 860, 830, and 840 are powered by high-performance processors, delivering fast and efficient processing capabilities. Equipped with the latest Intel Core processors, including i5 and i7 options, these laptops can handle demanding applications and multitasking with ease. The robust memory options, ranging from 8GB to 32GB, ensure smooth performance for memory-intensive tasks.

Display quality is another critical aspect of these laptops. The Sierra series features high-resolution screens that offer bright, vivid colors and sharp details, making them ideal for tasks requiring precision, such as drafting and design work. The touch-enabled displays enhance user interaction, providing convenience in outdoor settings where traditional input methods may be challenging.

The Sierra laptops also include a comprehensive array of connectivity options, ensuring seamless integration with various devices. With multiple USB ports, HDMI output, and optional mobile broadband, users can easily connect to peripherals, transfer data, and maintain communication. The inclusion of enterprise-level security features, including biometric scanners and encrypted storage, ensures sensitive data remains protected.

Battery life is another crucial factor in fieldwork, and the Sierra series excels in this area. With long-lasting batteries, these laptops can operate for extended periods without needing a recharge, making them perfect for long outdoor excursions or remote job sites.

In summary, the Sierra 860, 830, and 840 combine ruggedness, high performance, and extensive connectivity options, making them exceptional computing solutions for professionals in various challenging environments. Their advanced technologies and robust constructions ensure they can tackle the demands of outdoor work while maintaining reliability and efficiency.