Procedure
Use the Operator Menu selection to enter
application-specific data to configure the RA-1270 host monitor for a unique
application. Data includes: units of measure, fan diameters, flow units, site
elevation, system ranges, and zero cutoff. See the following table for configuration
options.
Table 1. Flow configuration selections
| Configuration
selections |
Configuration
options |
| Fan Diameter |
Select the fan or fan array and enter the
fan diameter: 10 in. to 48 in (25.4 cm to 60.96 cm). Select Fan
Array to configure the same diameter for all
fans. If you require a specific area, use
UP or DOWN
on the area display screen to change from
Confirm to Edit to enable a manual area
value entry.
|
| Site
Elevation |
Enter the site
elevation from 0 ft to 15,000 ft (0 m to 4572 m). |
| Relative
Humidity |
Enter the relative
humidity from 0% RH to 100% RH, 1% at a time. |
| Flow Units |
Enter the flow units. See Table 2 for available
units. |
| Output
Lockout |
Enter the output
lockout from 0 fpm to 750 fpm (0 mps to 3.81 mps). When the
measured velocity of a fan is less than this amount, the output
remains zero. |
Note: Press ESC at any time to return to the previous menu and exit without
changing any settings.
To configure flow selections, complete the
following steps:
-
While in the Operator
Menu, use UP or
DOWN to scroll to Flow Config.
-
Press ENTER to enter the
Flow Configuration Menu. The display
shows Fan Diameter > Site Elevation.
-
Select Fan Diameter and
press ENTER to prompt the user to confirm
the requirement for a new calibration if the diameter is modified.
-
Press ENTER to select the fan or fan array to view and
edit its diameter. Select Fan Array to set the same
diameter for all fans.
-
When you view the calculated area, use UP or DOWN to select between Confirm and Edit and
press ENTER to select.
-
Select Confirm to accept the entered diameter and
calculated area. Select Edit to enable manual entry for
the area and to change the diameter to match the entered area.
-
Use UP or DOWN to change the setting. When the required
setting displays, press ENTER. The new
setting stores in memory and the display progresses through the required values
for the selected shape and saves each value as they are confirmed. With all
required values entered, the display returns to the Flow
Configuration Menu.
-
Use UP or DOWN to select and change the remaining
parameters within the Flow Configuration Menu. Press
ENTER to change the selected
setting.
Note: See the following tables for the
list of available selections for the appropriate Flow
Type.
Table 2. Volumetric units of measurement from flow unit
selection and display units
| Flow
units |
Metric
units |
Imperial
units |
| Actual per
sec |
ALPS |
ACFS |
| Actual per
min |
ALPM |
ACFM |
| Actual per
hour |
ACMH |
ACFH |
| Standard per
sec |
SLPS |
SCFS |
| Standard per
min |
SLPM |
SCFM |
| Standard per
hour |
SCMH |
SCFH |
Table 3. Volumetric units of measurement
| Volumetric
units of measurement |
Display |
| Actual cubic
feet per second |
ACFS |
| Actual cubic
feet per minute |
ACFM |
| Actual cubic
feet per hour |
ACFH |
| Actual liters
per second |
ALPS |
| Actual liters
per minute |
ALPM |
| Actual cubic
meters per hour |
ACMH |
| Standard cubic
feet per second |
ACFS |
| Standard cubic
feet per minute |
SCFM |
| Standard cubic
feet per hour |
SCFH |
| Standard
liters per second |
SLPS |
| Standard
liters per minute |
SLPM |
| Standard cubic
meters per hour |
SCMH |
-
To return to the Operator Menu, scroll
to Exit this Menu in the Flow
Configuration Menu and press ENTER.
-
Alternatively, press ESC to return to
the Operator Menu. Press MENU to return to the normal display mode.