Operation; Keypad Functions; Common Terms; On/Off Key - TSI Instruments VelociCalc Plus 8384 Operation And Service Manual

Chapter 3

Operation

Keypad Functions

When pressing the keys on the front panel, the V C Plus will beep
ELOCI ALC
to confirm the function. If you press a key and the V C Plus does
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not beep, then the V C Plus does not allow that function during the
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selected mode.

Common Terms

In this manual there are several terms that are used in different places. The
following is a brief explanation of the meanings of those terms.
Sample: Consists of all of the measurement parameters stored at the same
time (a more detailed explanation is found in the Setting Data Storage
Options section of this chapter). The maximum number of samples is 1394.
Test ID: A group of samples. A test ID can contain one sample or up to
1394 samples. The statistics (average, minimum, maximum, and count) are
calculated for each test ID. The maximum number of test IDs is 275.
Time Constant: The time constant is an averaging period. It is used to
dampen the display. If you are experiencing fluctuating flows, a longer
time constant will slow down those fluctuations. The display will update
every second, but the displayed reading will be the average over the last
time constant period. For example, if the time constant is 10 seconds, the
display will update every second, but the displayed reading will be the
average from the last 10 seconds. This is also referred to as a "moving
average".
Logging Interval: The logging interval is a frequency period that the
instrument will log readings. For example, if the logging interval is set to
30 minutes, readings will be taken and recorded every 30 minutes.

ON/OFF Key

Press to turn the V C Plus on and off. During the power up
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sequence the display will show the following: all characters, % battery life,
% log (memory available), baud rate, time (HH:MM), entered barometric
pressure, entered temperature, and then velocity readings.
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