GE PT878 User Manual
Chapter 8. Servicing the PT878
Transport® Model PT878 Portable Liquid Flowmeter User’s Manual
167
Dual-Point Calibration (cont.)
IMPORTANT:
Be sure to hold the transducer steady until the GE wait
cursor disappears.
cursor disappears.
10.
Use the [
S
] key to return to the Zero tab, and then scroll to the Display
tab (page 162) to confirm the block length within ±0.002. If the
measurement is not within this limit, recalibrate the transducer offsets.
measurement is not within this limit, recalibrate the transducer offsets.
Once you have completed calibration, the transducer should remain
calibrated until the meter memory is cleared or a dramatic shift in ambient
conditions occurs.
calibrated until the meter memory is cleared or a dramatic shift in ambient
conditions occurs.
To leave the Zero window:
•
Press the [
W
] or [
X
] arrow key to move to another tab to take
readings or perform a velocity calibration.
•
Press
[F2]
(Cancel) to return to Operate Mode without confirming the
soundspeed value.
•
Press
[F3]
(OK) to confirm the new value. The PT878 returns to
Operate Mode.