95
Reference Manual
00809-0100-4803, Rev GA
Operation and Maintenance
September 2017
Operation and Maintenance
Under the
Sensor Matching
heading, the Callendar-Van Dusen constants R
0
, A, B, and C can be viewed. If
the Callendar-Van Dusen constants are known for the user’s specific Pt 100 RTD sensor, the constants R
0
,
A, B, and C may be edited by selecting the Callendar-Van Dusen Setup button and following the
on-screen prompts.
The user may also view the
α
,
β
, and
δ
Coefficients by selecting the
View Alpha, Beta, Delta
button. The
constants R
0
,
α
,
β
, and
δ
may be edited by selecting the
Callendar-Van Dusen Setup
button and
following the on-screen prompts. To reset the transmitter to the IEC 751 Defaults, select the
Reset to IEC
751 Defaults
button.
4.3.6
Analog calibration
Figure 4-5. Calibration - Analog Calibration Tab
Analog output trim
The Analog Output Trim commands allow the user to adjust the transmitter’s current output at the 4 and
20 mA points to match the plant standards. This command adjusts the digital to analog signal
conversion, see
To perform an analog trim, select the
Analog Trim
button and follow the on-screen prompts.
Scaled analog output trim
The scaled analog trim command matches the 4 and 20 mA points to a user selectable reference scale
other than 4 and 20 mA (for example, 1 to 5 volts if measuring across a 250 ohm load, or 0 to 100 percent
if measuring from a Distributed Control System [DCS]). To perform a scaled analog trim, connect an
accurate reference meter, select the
Scaled Analog Trim
button, and follow the on-screen prompts.
Mass and energy flow Fast Keys
1, 2, 5, 2
Direct process variable output Fast Keys
1, 2, 4, 5
Содержание 3051S Series
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