CiDRA SONARtrac PW VF-100 - Manual (Page 151)

20834-01 Rev 04 Page 8-7
8.2.9 Altitude (Systems with GVF)
Altitude is used to calculate the atmospheric pressure corrected for
elevation. Enter the elevation above or below sea level in units of feet
or meters.
The following equation is used within the transmitter to correct for
elevation.
P
atm
= 14.696 * [1 – ((Alt * 10 -3
)/145.45)]
5.2561
Where: P
atm
= absolute atmospheric pressure corrected for altitude (psi)
Alt = altitude (feet)
8.2.10 Calibration (Systems with Flow)
Calibration factors are specific to a given pipe size and wall thickness.
The value for ‘C0’ term, ’C1’ term, and ‘C2’ term are found on the
sensor band, and on the label that attaches to the sensor cover
access panel and inside the transmitter door.
8.2.11 Flow Direction- (Systems with Flow)
The Flow Direction input (‘Forward’ or ‘Reverse’) is used if the sensor
is installed with flow indicating arrows opposite the actual flow within
the process pipe. It is also used if the flow within the pipe is reversed.
8.2.12 Set Date/Time
The Date / Time are entered in the transmitter in order to set the time
stamp that will be applied to data downloaded stored in the
transmitter. Whenever possible, the time and date should to be
synchronized to the process control system. Note: The time is not
automatically updated to reflect daylight savings time.
8.2.13 Set Date Format
The Set Date Format allows for setting on the time and date in US
format ((MM/DD/YY HH:MM:SS), European format (DD/MM/YY
HH:MM:SS), or ISO8601 format (YY-MM-DD HH:MM:SS).