Dynasonics TFXP Series Transit Time Ultrasonic Flow Meter - Manual (Page 71)

Rev. 5/09
-3.33- TFXP
Signal
Strength
Alarm
Errors Alarm
Relay
The Sig Str alarm will provide an indication that the flow meter
signals between the transducers have fallen to a point where flow
measurements may not be possible. It can also be used to indicate
that the pipe has emptied. Like the flow rate alarm described on
page 3.13, the signal strength alarm requires that two points be
entered, establishing an alarm deadband. A valid switch point
exists when the ON> is a value lower than OFF<. If a deadband is
not established and the signal strength decreases to approximately
the value of the switch point, the relay may chatter.
When a relay is set to Errors mode, the relay will activate when any
error occurs in the flow meter that has caused the meter to stop
measuring reliably. See the Appendix of this manual for a list of
potential error codes.
RTD -- RTD (Value)
Calibration Value for:
1. RTD1 A (RTD1 A)
2. RTD1 B (RTD1 B)
3. RTD2 A (RTD2 A)
4. RTD2 B (RTD2 B)
Inputs from one or two 1000 Ohm RTD temperature sensors allows
measurements of heat flow (one RTD) or heat usage (two RTDs).
The values used to calibrate the RTD temperature sensors are
derived in the laboratory and are specific to an individual RTD. The
RTDs on new units come already attached to the RTD Module and
should not be changed.
Field replacement of RTDs without ISO module replacement is
possible using ULTRALINK™. See Part 4.
ISO-MOD:
RTD
(Optional)
PART 3 - KEYPAD CONFIGURATION