ABB XSeries G4 6200 User Manual page 122

4.13.5.2
To convert barometric pressure measured from inches of mercury to barometric
pressure (PSI), perform the following calculation:
Barometric pressure, in inches of mercury x .4912 or (2.036) equals barometric
pressure in PSI.
Step-by-step instructions
1) Enter the Calibration menu's Calibration screen. This places the G4 EX in
2) Select SP from the Calibration drop-down box to the left of the Pressure
3) Set the Transducer SP Pressure Range in the Calibration window. This
4) Select the SP type: Absolute or Gauge.
5) Enter the barometric pressure in the bottom window before proceeding.
6) Verify that the vent valve is closed (see Figure 4–12).
7) Open both the high and low equalizer valves.
8) Close both the downstream and upstream tap valves.
9) Open the atmosphere vent valve.
10) Click on the Low Cal Point button. Verify the current reading is continuously
11) When the current reading stabilizes, click the OK button; otherwise, enter a
12) When the previous reading was accepted, notice that the 100% Cal Point
13) Connect calibration standard to the calibration test port.
14) Close the atmosphere vent valve.
15) Pressure to 100% of the transducer range (100% of the target value).
16) When the current reading stabilizes, accept the target value already
17) Again, notice that the next Cal Point is activated. To select, press Enter.
18) Pressure the transducer to the next target value as shown in the Calibration
19) When the current reading stabilizes, accept the target value already
20) Repeat steps 17 through 19 until all calibration points have been entered.
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Calculating PSI
Hold. Select the preferred measurement tube from the tree-view.
Marker table. Select 3 or 5 Point Calibration.
should match the range reading from the tag or label attached to the
transducer.
Absolute will display values with the barometric pressure
added in. Additionally, entered values will need the
barometric pressure added. Gauge will display values in
gauge pressure. Additionally, entered values will need to be
in gauge pressure.
updated. This should represent the lowest calibration point.
different value, and then click the OK button.
button is activated. To select, press Enter.
showing in the window; otherwise, enter the pressure value from the
calibration source. Click the OK button.
window.
showing in the window; otherwise, enter the pressure value from the
calibration source. Click the OK button.
2104349 rev. AD