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Chapter 8. Servicing the PT878
184 Transport® Model PT878 Portable Liquid Flowmeter User’s Manual
8.9 Setting Error Limits
The Error Limits option enables you to set limits for an incoming signal.
When the signal falls outside the programmed limits, an error indication
appears. To enter this option, scroll to the Error Limits entry on the Service
Menu and press
[ENTER]. The screen appears similar to Figure 122 below.
Figure 122: Signal Error Limits Option
1. The first prompt asks for the minimum and maximum limits for the
transducer signal received by the PT878. The default values are 40 for
minimum and 85 for maximum. The E1: LOW SIGNAL error message
appears if the signal strength falls below the limit programmed here.
To enter the minimum signal
a. Press [ENTER] to open the text box.
b. Use the numeric keys to enter the desired value.
c. Press [ENTER] to confirm your entry.
Programming
Signal Error Limits
Cancel
OK
Signal
Sound Speed (±)
Amplitude
Velocity -12
m/s
Min
Max
40
85
12
10 34
%
20
Acceleration
m/s
15