Specification 7828 Density Transmitter Technical Manual
A-4 78285000_AB
A.3 FACTORY DEFAULT CONFIGURATION
The 7828 can be supplied in one of three standard configurations (see Section 1.2, 7828
Options).
For Factory Configuration Option A, the 7828 is set to provide line density as the 4-20mA
output, and the units are kg/m
3
for density and °C for temperature.
For Option B, API base density is configured for output to the 4-20mA port, and the units
are g/cc and °F.
For Option C, Matrix referral is used to calculate the base density output, and the matrix
will have been configured to the customer’s specification. All other default settings are as
for Option A.
The default values for these three configurations are shown below.
Options A and C Option B
Analog output
Variable Line density Base density (API)
Units kg/m
3
g/cc
4mA setting 500 0.5
20mA setting 1500 1.5
Alarms
Coverage General system
Analog output
User range
General system
Analog output
User range
Hysteresis 2% 2%
Alarm user range
Variable Line density Line density
Units kg/m
3
g/cc
Low setting 0 0
High setting 1000 1
Density
calculations
Temperature units ° C ° F
Temperature offset 0 0
Pressure units bar psi
Pressure set value 1.1013 14.5
Line density units kg/m
3
g/cc
Line density scale factor 1 1
Line density offset 0 0
Matrix referral
Reference temperatures All 20 * All 68
Reference densities All 0 * All 0
Base temperature 20 * 68
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