Rosemount 1151GP - Reranging Using the Integral Span and Zero Buttons and a Reference Pressure

Reference Manual
00809-0100-4360, Rev BA
August 2008
Rosemount 1151
3-10
Reranging Using the Integral Span and Zero Buttons and a Reference
Pressure
It is also possible to rerange the transmitter using the span and zero buttons
located within the circuit side of the electronics housing on the electronics
faceplate, as shown in Figure 3-5.
Reranging with a pressure input and the zero and span buttons maintains the
same analog span.
Figure 3-5. Rosemount 1151
Electronics Faceplate.
Use the following steps to rerange using the integral span and zero buttons:
1. Using a pressure source with an accuracy three to ten times the desired
calibrated accuracy, apply a pressure equivalent to the lower calibrated
value to the high side of the transmitter.
2. Remove the circuit side cover to expose the span and zero buttons. Hold
both the span and zero buttons down simultaneously for at least five
seconds to activate the controls. The buttons remain active for 15
minutes. After 15 minutes the buttons must be reactivated by pressing
simultaneously and holding again.
3. Press the zero button for five seconds to set the 4 mA point. Verify that
the output is 4 mA.
4. Apply a pressure equivalent to the higher calibrated value to the high
side of the transmitter.
5. Press the span button for five seconds to set the 20 mA point. Verify that
the output is 20 mA.
NOTE
Both the lower and upper range values must fall within the lower and upper
range limits of the sensor module, and meet the minimum and maximum span
criteria allowed by the transmitter.
HI
NOTE
User-selectable switches are shown
in default position.