calculated by comparing ratios of their respective heat capacities. These ratios have been calculated and are tabulated on a chart on page 16 of this manual as THR conversion factors. These factors are used as written only when an instrument calibrated for AIR is being used to measure the flow of a different gas. These correction factors are theoretical and they are believed to be correct by the manufacturer, but due to the wide variety of gases and the toxic or caustic properties of many of them, the accuracy of most of the correction factors has not been verified.

3.2.1 Calculation of Correction Factors For Standard Volumetric Units

Often customers would like to measure a variety of gases with the same flowmeter without having to go through the trouble some process of recalibrating the flowmeter each time a new gas is measured. The alternative has always been that each flow reading could be calculated by multiply- ing the display by the conversion factor, but this has always been time consuming and the actual flow of a process cannot be continously monitored without having a calculator present. By incorpo- rating the multiplication network into the Model 40 Power Supply, the calculations can now be made by the power supply itself continuously. All that is required is for the customer to calculate the conversion factor once as per instructions below, and then dial it in for each channel using the CONVERSION FACTOR potentiometer on the front panel.

This factor can displayed for each channel of the power supply by turning the CHANNEL

SELECTOR switch to the desired channel and pressing the CORRECTION FACTOR SWITCH. The flowmeter output is being multiplied by the number that is displayed before the flow signal is sent to the display. When the flowmeter is measuring the same gas for which it is calibrated,

the correction factor is 1.000 and the flow signal will be sent to the display unchanged by the multiplication network.

EXAMPLE: A 100 SLPM flowmeter is calibrated for air. The power supply is set up to display

100.0when the flowmeter has the full scale output of 5.000 VDC. With helium flowing through the same flowmeter, the display would still read 100.0 at 5.00 VDC, however, the flow would be ap- proximately 143 SLPM. If the calibration factor for a selected channel is set to 1.430, then

the display will correctly indicate the flowrate of helium, which would be 143.0 SLPM at full scale.

If a flowmeter is calibrated for a gas other than air by the manufacturer, then the correction factor will be set to 1.000 when that gas is being measured. If a different gas is being used in the same flowmeter, then the correction factor can be calculated by taking the factor for the new gas and dividing by the factor of the gas for which the flowmeter is calibrated.

EXAMPLE: If a flowmeter is calibrated for helium at 100.0 SLPM, the correction factor will read 1.000 when the CORRECTION FACTOR switch is depressed. The display will read 100.0 when the flowmeter has an output of 5.000 volts. This indicates the full scale flowrate of 100.0 SLPM. If carbon dioxide is now measured by the flowmeter, the correction factor should be set to

.510, which is the THR correction factor for carbon dioxide (.73) divided by the factor for helium (1.43). The display will now read full scale (51.0 volts) when the flowmeter has 51.0 SLPM of carbon dioxide flowing through it, and the flowmeter will have an output of 5.000 volts.

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Teledyne 40, Power Supply instruction manual
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40, Power Supply specifications

Teledyne Power Supply, 40 is a cutting-edge power solution designed to meet the demanding needs of various industries, including aerospace, defense, telecommunications, and industrial applications. This advanced power supply system boasts several key features and technologies that enhance its performance and reliability.

One of the primary characteristics of the Teledyne Power Supply, 40 is its robust design, capable of delivering high levels of power density while maintaining compact dimensions. This makes it ideal for applications where space is at a premium, such as in satellite systems and airborne electronics. The unit also employs advanced thermal management techniques, ensuring optimal performance even in challenging environments.

The Teledyne Power Supply, 40 is equipped with modular architecture, allowing users to customize the output voltage and current according to specific application requirements. This flexibility is complemented by a wide input voltage range, which provides compatibility with various power sources, making it suitable for both AC and DC input configurations.

One of the standout features of the Teledyne Power Supply, 40 is its integrated digital control system. This technology enables precise monitoring and control of output parameters, enhancing efficiency and performance. Users can easily configure settings via a user-friendly interface, often accessible through a remote connection. The system supports various communication protocols, facilitating seamless integration into existing control systems.

In terms of safety and reliability, the Teledyne Power Supply, 40 incorporates multiple protection mechanisms, including overvoltage, overcurrent, and thermal shutdown features. These safeguards ensure that both the power supply and the connected loads are protected against adverse conditions during operation.

Additionally, this power supply unit is designed to meet stringent military and aerospace standards, ensuring high levels of performance in harsh environments. Its rugged construction and thorough testing protocols contribute to its reliability, making it a trusted choice for mission-critical applications.

In conclusion, the Teledyne Power Supply, 40 is a sophisticated power management solution that combines flexibility, advanced technology, and reliable performance. Its modular design, precision control systems, and comprehensive safety features make it an ideal choice for demanding applications, setting a benchmark for power supply systems in today’s competitive market. Whether utilized in aerospace, industrial, or telecommunications sectors, the Teledyne Power Supply, 40 consistently delivers the performance and reliability required to meet the needs of modern technological demands.
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