
Chapter 8. Servicing the PT878
166
Transport® Model PT878 Portable Liquid Flowmeter User’s Manual
Dual-Point Calibration (cont.)
1.
Press the [
T
] arrow key to enter the window.
2.
The first prompt asks you to choose between single and dual-point
calibration. Use the [
W
] and [
X
] arrow keys to move to the Dual radio
button and press
[ENTER]
.
3.
The next prompt asks you to enter the length of Block 1. (If you are
using a GE-supplied test block, the length is printed on the block.)
a.
Press
[ENTER]
to open the text box.
b.
Use the numeric keys to enter the length.
c.
Press
[ENTER]
to confirm the entry.
4.
Press [
X
] to move to the Calibrate button, and press
[ENTER]
to
prepare for calibration. Then apply couplant B to the Block 1 surface,
and hold the transducer against the block.
5.
When you have the transducer firmly pressed against the block and the
Ready button appears, press
[ENTER]
again to perform the calibration.
Note:
For single-point calibration, skip to step 9.
6.
The next prompt asks you to enter the length of Block 2.
a.
Use the arrow keys to move to the Block 2 text box.
b.
Press
[ENTER]
to open the text box.
c.
Use the numeric keys to enter the length.
d.
Press
[ENTER]
to confirm the entry.
7.
Press [
X
] to move to the Calibrate button, and press
[ENTER]
to
prepare for calibration. Then apply couplant B to the block surface, and
hold the transducer against the block.
8.
When you have the transducer firmly pressed against the block, press
[ENTER]
(Ready button) again to perform the calibration.
9.
Hold the transducer steady until the Set button appears. Press
[ENTER]
to store the calibration.