14.11.2014 Views

STX Signal Transmitter Installation and Operation ... - Kistler-Morse

STX Signal Transmitter Installation and Operation ... - Kistler-Morse

STX Signal Transmitter Installation and Operation ... - Kistler-Morse

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

Chapter 9. MVS-<strong>STX</strong><br />

Math Channels<br />

Chapter 9. MVS-<strong>STX</strong> Math Channels<br />

Main<br />

Disp I/O<br />

Math Service<br />

C + * - ÷ = ( ) CLR ln e^<br />

Note: Math comes up in the Main Menu if you<br />

scrolled to a math channel while vessel monitoring.<br />

If the channel is a vessel monitoring channel, the<br />

menu tree shows Cal in place of Math.<br />

Figure 9-1. Math Channel Menu Tree<br />

Introduction<br />

The Math Menu is used to perform math<br />

calculations on the results from the channels<br />

associated with vessel monitoring. The<br />

calculated value can be displayed on the<br />

MVS while monitoring a math channel, in<br />

both Auto <strong>and</strong> Manual Modes. And, just like<br />

for a vessel monitoring channel, the calculated<br />

value from a math channel can have<br />

setpoints <strong>and</strong> current outputs associated<br />

with it.<br />

As shown in Figure 9-1, the Math Menu<br />

includes 12 math functions. These functions<br />

can be used to process the vessel monitoring<br />

results in many ways. A few typical uses of<br />

the math channels follow:<br />

• Add together or calculate the average for<br />

the weight from multiple vessels to<br />

provide information on the total inventory<br />

of a product stored in several vessels<br />

• Convert the data into another set of units,<br />

such as converting a weight in pounds<br />

into a level in feet, to provide additional<br />

information on the vessel contents<br />

All channels not used by a signal processor<br />

PCB or a slave device are available for math<br />

calculations. For example, for an MVS<br />

serially connected to eight <strong>STX</strong>s <strong>and</strong> with no<br />

other signal processor PCBs or slave devices,<br />

channels 1 through 8 are signal<br />

processor channels <strong>and</strong> channels 9 through<br />

120 are available for math calculations.<br />

This chapter covers the use of the Math<br />

Menu. The chapter includes:<br />

• Explanation of each of the math functions<br />

<strong>and</strong> the keyboard functions<br />

• Rules for inputting equations<br />

• Detailed navigation procedures for<br />

enabling a math channel<br />

• Detailed navigation procedures for setting<br />

up a math channel, using an example<br />

average weight calculation<br />

• Explanation of compile error <strong>and</strong> run time<br />

error codes<br />

When in the Math Menu, the display shows<br />

the math equation on the top line <strong>and</strong> the<br />

available functions on the bottom line.<br />

9-1

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!