Manuals / Sierra / Marine Equipment / Marine Sanitation System

Sierra 830, 860, 840 instruction manual Example

Models: 840 830 860

1 74
Download 74 pages 60.88 Kb
Page 59
Image 59

Series 830/840/860 Instruction Manual

Appendix A

 

 

For our purposes, we want the ratio of the flow rate, Q1, for an ac- tual gas to the flow rate of a reference gas, Q2, which will produce the same output voltage in a particular mass flow meter or control- ler. We get this by combining equations (1) and (5):

Q1/Q2 = K1/K2 = (N1/ ρ1Cp1)/(N2/ρ2CP2)

(6)

Please note that the constant b cancels out. Equation (6) is the funda- mental relationship used in the accompanying tables. For conven- ience, the tables give “relative” K-factors, which are the ratios K1/K2, instead of the K-factors themselves. In the tables, the relative K-factor is

Kactual/KN2 where the reference gas is the commonly used gas, nitrogen (N2). The remaining columns give Cp and ρ, enabling you to calculate K1/K2 directly using Equation (6). In some instances, K1/K2 from the tables may be different from that which you calculate directly. The value from the tables is preferred because in many cases it was ob- tained by experiment. Sierra calibrates every transducer with primary standards using the actual gas or a molecular equivalent reference gas. The calibration certificate accompanying the transducer cites the refer- ence gas used.

Example 1:

A transducer is calibrated for nitrogen (N2), and the flow rate is 1000 sccm for a 5.000 VDC output signal. The flow rate for car- bon dioxide at a 5.000 VDC output is:

QCO2/QN2 = KCO2/K N2, or

QCO2 = (0.74/1.000)1000 = 740 sccm

Example 2:

A transducer is calibrated for hydrogen (H2), and the flow rate is 100 sccm for a 5.000 VDC output signal. The flow rate for nitrous oxide (N2O) is found as follows:

QN2O/QH2 = K N2O/K H2, or

Q N2O = (0.71/1.01) 100 = 70.3 sccm

Note that the K-factors relative to nitrogen must be used in each case.

Example 3:

We want a transducer to be calibrated for use with dichlorosilane (SiH2Cl2) at a 100 sccm full scale flow. We wish to use the pre- ferred reference gas Freon-14 (CF4). What flow of CF4 must we generate to do the calibration?

 

QSiH2CL2 /QCF4 = K SiH2CL2 /K CF4

 

100/Q CF4 = 0.869

 

Q CF4 = 100/0.869 = 115 sccm

IM-83/84/86-H

A-5

Page 58 Page 60
Page 59
Image 59
Sierra 830, 860, 840 instruction manual Example
Page 58 Page 60

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.