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Chapter 8. Servicing the PT878
Transport® Model PT878 Portable Liquid Flowmeter User’s Manual 165
8.4.4 Calibrating the Thickness Gauge Transducer
To zero the transducer offsets, go to the Zero tab. Press the [W] or [X]
arrow key until you reach the Zero tab and press
[ENTER]. The screen
appears similar to Figure 112 below.
Figure 112: Zero Window
Dual-Point Calibration
Note: The factory recommends dual calibration. Dual-point calibration is
more reliable, but it requires two known thickness levels of the
calibration material. Use single-point calibration only if you know
the velocity of the calibration block material to a high degree of
accuracy. For single-point calibration, complete the following
procedure, but skip steps 6, 7 and 8. See Appendix D for more
information.
Display
Thickness Gauge Measure
Cancel OK
Graph
Velocity
Zero
Material
Block 1 Length
Calculated Current
Transducer Delay,
0
0
Single
Dual Calibration
0
mm
Calibrate
µs