GE TransPort PT878GC User Manual page 237

Setting Error Limits (cont.)
d. Press the [ ] arrow key to move to the maximum signal
box, and repeat steps a, b and c.
e. Press the [ ] arrow key to return to the minimum signal
box, and the [
2. The next prompt calls for the low and high velocity limits. The
E3: VELOCITY RANGE error message appears if the
velocity falls outside these limits. Repeat the steps in Step 1
on the previous page to enter the desired limits.
3. The third prompt calls for the low and high limits for the
amplitude discriminator. The discriminator measures the size
of the transducer signal sent from the PT878GC. If the signal
falls outside these limits, the E5: AMPLITUDE error message
appears. Repeat the steps in Step 1 on the previous page to
enter the desired limits.
4. The fourth prompt asks for the acceptable limits for the sound
speed, based on conditions in your particular system. The E2:
SOUND SPEED error message appears if the fluid sound
speed exceeds that entered in the Pipe option of the Program
menu by more than this percentage. The default value is 20%
of the nominal soundspeed.
a. Press
[ENTER]
b. Use the numeric keys to enter the desired percentage.
c. Press
[ENTER]
5. The final prompt asks for the acceleration limit for detecting
cycle skipping. The E6: CYCLE SKIP/ACCELERATION
message appears if the velocity changes by more than this
limit from one reading to the next.
a. Press
[ENTER]
b. Use the numeric keys to enter the desired speed.
c. Press
[ENTER]
Servicing the PT878GC
] key to move to the next limit.
to open the text box.
to confirm your entry.
to open the text box.
to confirm your entry.
April 2009
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