Intek RheoVac 940 User Manual

Page 20

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RheoVac 24hr Data Download - Selecting this choice initiates a download from the data stored
in the RheoVac instrument. This operation takes a few minutes to complete. After the data has
been transferred, you will be prompted to select a filename to store the data. The default filename
is the instrument’s serial number with an “.eep” file extension.

RheoVac Air In-Leak Monitor - Use this choice to plot selected data on single or dual charts.
This application can also be used to acquire data continuously into your computer system. The
screen shown on page 20 appears when this choice is selected. Select the rate that the RheoVac
data will be written to disk. This number represents the time between data points saved to disk.
The stored process values will be the average value of all incoming data since the last archive.
After setting the archive rate, hit the “ARCHIVE TO FILE” button. This begins data collection to
your hard drive. Any previously saved data in the selected file will be retained as new data is
appended to the end of the older data. Each file record contains a time stamp and all ten process
variables regardless of the chart configuration or group select status. The file is built in an ASCII
spreadsheet tab-delimited format and can be easily imported to spreadsheet programs such as Excel.

Archiving continues to build data into the active archive file. You should maintain the file size by
temporarily stopping the archive and renaming the data file based on your data management needs.
Intek recommends either daily or weekly data maintenance schedules.

We encourage you to send to the factory an initial week or so of data (zipped format is preferred)
via e-mail at techsupport@intekflow.com. This provides a baseline for the particular condenser
and will help us support you should future system problems arise. Our experienced support
engineers can access the “before” and “after” effects of an upset and work with you to identify and
understand the problem.

For further assistance on any feature, select help by right clicking on any button or control in the
application window and select “Description...” from the list.

Change Line Size - Use this option to update the instrument's stored line size variable for proper
volume and mass flow calculations. You should only need this option if the probe is installed in
a pipe size that is different from the value set in the instrument at the factory. Enter the new line
value, then click on “Send.”

3.4.3

DATA PROCESSING

TABLE IV. Column Headings f or Dat a Dow nloads and A rchived Data

Time

Stamp

(Time of

day)

Actual

Volume

Flow

(ACFM)

Total

Mass Flow

(lbs/hr)

Water
Vapor

Flow

(lbs/hr)

RheoVac

Pressure

("Hg abs)

Water

Vapor Sp.

Vol.

(Cu. ft/lb)

Water to

Air Mass

Ratio

(lb/lb)

Relative

Saturation

(%)

H

2

O

Partial

Pressure

("Hg abs)

Air Flow

In-Leak

(SCFM)

Probe

Temp. (°F)

0

1

2

3

4

5

6

7

8

9

10

Data may be retrieved from disk into any ASCII viewer or spreadsheet program. To do this, data
archiving may need to be terminated unless you open the file as read-only. Data is stored with an
appropriate number of significant digits. However, spreadsheet programs such as Excel may need you
to do additional formatting to display each field to the precision you need (e.g., Excel displays the time

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