Fisher-Rosemount 3095FT, Manual

Page: 75 / 184

4-27
Using the Model 3095FT User Interface Software
Maintenance Screens Maintenance screens perform maintenance and calibration tasks such
as sensor trim, damping, and setting the units of measure. Unlike the
configuration screens, any changes made using a maintenance screen
occur
immediately to the connected Model 3095FT transmitter. The
only exception is the “Matls of Const” screen, which is read-only.
NOTE
Security Level SL1 provides read-only access. Security Level SL2 and
SL3 provides read/write capability.
Maintenance
Transmitter
Sensor Trim
The sensor trim screens are used during bench and field calibration of
the Model 3095FT Flow Transmitter.
In addition to the User Interface Software, the following equipment is
required for a sensor trim procedure:
• Model 3095FT
• Dead-weight tester
• Power supply
• Vacuum pump or a barometer that is at least 4 times as accurate
as the Model 3095FT AP sensor. A barometer is preferred.
Sensor Trim Procedure (For Bench Calibration)
NOTE
Although the Model 3095FT can calculate and log static pressure as
absolute or gage, flow is always calculated using the absolute pressure
sensor measurement.
1. Trim SP Offset (Zero).
a.Select Maintenance, Transmitter, Sensor Trim to display the
Sensor Trim Select screen.
b.Select SP and Offset & Slope, then select Ok to display the
“Sensor Trim: Enter Value” screen.
30
95-
30
950
009
FIGURE 4-15. Sensor Trim Select
Screen.
30
95-
30
950
022
FIGURE 4-16. Sensor Trim Enter Value
Screen.