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Main Soft Keys
Next Test
•Increments to the next available test ID.
Menu
•Accesses the main and sub-menus
Stats
•Displays the average, minimum, and
maximum readings of the current Test ID.
oStatistics can also be viewed from
the Data Logging menu.
Common Terms
Sample Consists of all of the measurement parameters stored at the same time.
Test ID A group of samples. The statistics (average, minimum, maximum, and count)
are calculated for each test ID. The maximum number of test IDs is 100.
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 read-
ings. For example, if the logging interval is set to 30 minutes, each sample will
be the average of the last 30 minutes.
Log Mode/Log Settings
You can set Log Mode to Manual, Auto-save, Cont-key, Cont-time, Program 1 or Program 2.
•Manual mode does not automatically save data, but instead prompts the user to save a sample.
•In Auto-save mode, the user manually takes samples that are automatically logged.
•In Cont-key mode, the user starts taking readings and logging by pressing the key. The in-
strument will continue taking measurements until the key is pressed again.
•In Cont-time mode, the user starts taking readings by pressing the key. The instrument will
continue taking samples until a set period of time has passed.
•Auto-save, Cont-Key and Cont-time modes have the following additional Log Settings:
Mode Log Settings
Auto-save Log Interval
Cont-key Log Interval
Cont-time Log Interval
Test Length
•Pressing the ST keys simultaneously will lock the keypad to prevent unauthorized adjust-
ments to the instruments. To unlock the keypad, press the ST keys simultaneously.
