4-14
Checking Differential Pressure (DP)
As discussed above under “Checking Static Pressure (SP) Calibration”, it is recommended that checks
of the Differential Pressure (DP) be done prior to and directly following calibration.
You can enter as many DP pressure markers as you desire. Recording too many markers may cause
the
µ
FLO to overwrite existing older events. Only the last five checks are used by the WINCCU editor for
calibration adjustment. Enter a low, mid-low, mid, mid-high and high value.
During this procedure, you will pressure the high side of the cell by closing both the
high and low side orifice valves, open the vent to atmosphere and the low side
bypass valve, and closing the high side bypass valve.
Calibrating Differential Pressure (DP)
A three or five point pressure method is used to calibrate the
µ
FLO Differential Pressure cell. These
different pressures are applied to the cell from a known traceable source with resultant pressure values
entered into the
µ
FLO using PCCU software.
During factory calibration, the Differential Pressure (DP) is set to zero to compensate for any leaks that
may be detected. After field calibration of the unit, the correction made at the factory remains as is. This
ensures that the readings received in the field are accurate. The user may not change the factory set
shift. If readings appear incorrect, you may need to check for leaks and then re-calibrate the DP.
When calibrating, wait for the readings to stabilize before entering new values.
Setup RTD
Although the RTD (Resistive Temperature Detector) temperature is accurately self-calibrating, you can
match it to another reference source. This is accomplished by entering temperature bias, which shifts
the RTD probe curve either positive or negative.
Setting
µ
FLO
Temperature
Calculation
The
µ
FLO temperature calculations can be set to the following conditions:
•
Selection of "Fixed Temperature" Used in Calculations—causes fixed
temperature to be used in flow calculations.
•
Selection of "Fixed Temperature" and “RTD Installed”—will record RTD
temperature while using fixed temperature in calculations.
•
Selection of "RTD Installed" and not use "Fixed Temperature—measures and
uses RTD temperature in calculations. However, if a temperature error occurs
such as an A/D error, the “Fixed Temperature” will be used for calculations.
Selecting “RTD Installed” only, does not force the unit to use the flowing
temperature in its calculations. You must turn off the “Fixed Temperature” selection.
Summary of Contents for uFLO
Page 1: ...2100890 001 AB TOTALFLOW µFLO Computer User s Manual ...
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Page 16: ...1 2 FLO 6213 Figure 1 1 µFLO 6213 Dimensions ...
Page 18: ...1 4 Figure 1 3 Bottom View µFLO 6213 9 367 9 992 8 647 Figure 1 4 Bottom View µFLO 6210 ...
Page 39: ...2 9 FLO 6213 Figure 2 7 µFLO 6213 Wall Mounted ...
Page 50: ...2 20 Figure 2 13 Mounting AC Charger ...
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Page 64: ...3 14 B B Bl lla a an n nk k k P P Pa a ag g ge e e ...
Page 70: ...4 6 11 9 5 4 1 13 3 FLO 6210 12 8 7 10 2 Figure 4 2 µFLO 6210 Component Cable Locations ...
Page 71: ...4 7 1 6 FLO 6213 5 13 3 2 4 7 8 10 9 12 11 Figure 4 3 µFLO 6213 Component Cable Locations ...
Page 132: ...6 2 B B Bl lla a an n nk k k P P Pa a ag g ge e e ...
