Vemco VR60 - Unit Conversion; Depth and Temperature Conversion

17
Converting Units
The calibration data supplied with each transmitter contains the slope and intercept for a particular
set of units (for example, depth in meters). If the units of display are to be changed, the slope and
intercept data must be converted to match the desired units. The following examples show the
procedure for depth and temperature. The conversion factors are listed in the table below.
DEPTH:
Slope : 250 m/s × 3.281 = 820 ft/s ÷ 6 = 137 fath/s
Intercept : -240 m × 3.281 = -787 ft ÷ 6 = -131 fath
TEMPERATURE:
Slope : (15.5 °C/s × 1.8) + 32 = 60 °F/s
Intercept : (-15.0 °C × 1.8) + 32 = 5 °F
UNIT CONVERSION FACTORS
PRESSURE: 1 bar =
1 psi =
14.50377 psi
703.1 kg/m
2
DEPTH: 1 psi =
1 psi =
1 foot =
1 meter =
1 fathom =
2.307 feet of fresh water at 4 °C
2.244 feet of sea water at 0 °C
0.3048 meters
3.281 feet
6 feet
TEMPERATURE: N °C = [(1.8 × N) + 32] °F
CONDUCTIVITY: 1 R* = 42.914003 mmho/cm
* R is the ratio of in situ conductivity to the standard conductivity at Salinity = 35
ppt, Temp = 15 °C, and Press = 0, where Press is the pressure above one standard
atmosphere.