User`s manual

December 2003
3-40 Programming Site Data
Entering Signal Limits
The SIGNaL sub-option enables you to set the limits for the
incoming signal and other parameters that affect the transducer
signal. For example, you can adjust the low and high limits of the
transducer signal strength. When the signal falls outside the
programmed limits, the TransPort alarm sounds.
To enter the SIGNaL sub-option, press [F1]. The indicator box
shows you are at the beginning of the SIGNaL sub-option. The
SIGNaL sub-option enables you to set the following:
• low and high limits for the transducer signal strength
• limit for the transducer signal quality
• low and high limits for the sound speed of your fluid
• negative and positive velocity limits
• acceleration limits
• low and high limits of the amplitude discriminator
• Delta T offset
• percent of peak
• transmitter voltage
• transmitter sample size
• number of errors allowed before the flowmeter shows an error
message
• the minimum and maximum percentage of peak value of a
signal that the TransPort uses to register a signal
When the reading is outside the acceptable programmed limits,
the TransPort trips the alarm. Use these steps to set limits.
1. Setting the Transducer Signal Low Limit
At this prompt enter the low limit for the transducer signal
coming into the TransPort. This value is set to 25 by default.
• Press [ENT] to accept the current setting, or
• Use the numeric keys to enter a new value and press [ENT].
Acceptable values are between -20 and 100.
The E1: LOW SIGNAL error message comes on when the signal
strength falls below the low limit that you set.