Dynasonics MFX Series Insertion MagProbe Flow Meter - Manual (Page 50)

Rev. 01/11
-3.16- MFX
SUB FLOW - Substitute Flow
Substitute Flow or SUB FLOW is a value that the analog outputs
and the flow rate display will be driven at when an error condition in
the flow meter occurs. The typical setting for this entry is a value
that will make the instrument display zero flow during an error
condition. TABLE 3.2 below lists some typical settings to achieve
“Zero” with respect to MIN and MAX FLOW settings.
SET ZERO -- Calibrating Zero Flow
The MFX flow meter has been calibrated at the Dynasonics factory;
this calibration procedure includes calibration of “zero” flow. Field
calibration of “zero” is typically not required and other
troubleshooting methods should typically be reviewed to ensure that
the flow meter “zero” requires recalibration.
To zero the meter:
1. The pipe must be full of liquid.
2. Flow must be absolute zero—verify by closing a valve securely.
Allow time for any settling to occur.
3. Press ENTER, use the arrow keys to make the display read
YES.
4. Press ENTER.
5. The procedure is complete.
An alternative method for verifying and calibrating zero flow
when flow cannot be turned off is covered in Section 4 of this
manual.
PART 3 - KEYPAD CONFIGURATION
Substitute
Flow Entry
Setting/
Calibrating
Zero Flow
MIN RATE
SETTING MAX RATE
SETTING
SUB FLOW
SETTING
DISPLAY READING
DURING ERRORS
0.0 1,000.0 0.0 0.000
-500.0 500.00 50.0 0.000
-100.0 200.0 33.3 0.000
0.0 1,000.0 -5.0* -50.00
*ULTRALINK is required to set values outside of 0.0-100.0.
TABLE 3.2
Substitute Flow Entry