Log Methods; Table 3-3. Available Log Data Types - Thermo Scientific TVA2020 Instruction Manual

Log Methods

Thermo Fisher Scientific
Selecting the LOG mode not only identifies the way in which data is stored
in instrument memory but also governs the way the RUN mode works.
Four possible choices in the LOG mode are available, None, Auto,
VOC/FE, and Custom.
Table 3–3. Available Log Data Types
Option Description
1. None: Selecting None means that no logging action takes place at all. When the
instrument is in the RUN mode, you can only display readings.
2. Auto When you select and configure the AUTO method, the RUN mode functions
automatically once an action is initiated. You choose an automatic logging
rate between 1 second and 999 minutes, type a tag identifier, and start the
instrument. You initiate automatic sampling by either pressing the LOG key
on the probe or the ENTER key on the instrument. From that point on, the
instrument automatically logs the reading of the sample at the end of each
countdown and continues to do so until the battery goes low, you press the
EXIT key, or the logging memory is full.
3A. VOC The VOC method of sampling is a manual means of triggering a sample/log.
Once configured for VOC, the RUN mode prompts you to type a tag
identifier. After you enter the tag, the instrument stands ready until you
initiate the logging mode with with the enhanced probe or press the ENTER
key on the instrument. Once LOG is initiated, the instrument counts down.
Samples are taken over that count down and the highest reading achieved,
or average (or last) reading is logged in memory and displayed on both
displays. The stored values are cleared by pressing either the SELECT key
on the enhanced probe or the ENTER key on the instrument. Each VOC log
must be done manually and individually.
3B. F.E. The F.E. method of sampling is a manual means of triggering a sample/log
using a pre-configured monitor route file which has been downloaded and
stored in instrument memory. The F.E. method requires use of the enhanced
probe. You choose a sample time of between 2 and 30 seconds and you
choose to log either the highest reading or average (or last) reading
achieved during the sample time. Once configured for F.E. and the RUN
mode entered, the FE probe menu screen guides you through the monitor
route, displaying each pre-configured tag identifier in sequential order. A
SEARCH function is available at the probe menu to allow you to find tags
that are out of order. The probe display prompts you to confirm the tag
identifier, after which the instrument stands ready until you either select
LOG from the probe or press the ENTER key on the instrument. Once
initiated, the instrument begins a count down, sampling over the configured
sample time. The reading sampled during the countdown is displayed on
both displays and you are given the option to save the reading in memory or
to select LOG again. The stored values are cleared by selecting LOG on the
probe display or by pressing ENTER on the instrument. Each F.E. log must
be done individually and manually.
4. Custom The Custom mode allows the user to configure all the logging parameters.
Refer to the Log Custom section for a more complete description.
Display Menus
Log Methods
TVA2020 Instruction Manual 3-15