Dynasonics 701_771C Series Insertion Ultrasonic Flow Meter - Manual (Page 10)

Rev. 12/97 -9- D77X
PART 2 - PRE-INSTALLATION CHECKOUT
After unpacking, it is recommended to save the shipping
carton and packing materials in case the instrument is
stored or re-shipped. Inspect the equipment and carton
for damage. If there is evidence of shipping damage,
notify the carrier immediately.
The D77 flow meter can be checked for basic
functionality using the following Bench Test procedure.
It is recommended that this operation be performed
before permanently installing the system.
Procedure:
1. Open the D77 transmitter cover.
2. Connect the transducer cable connector to the
terminal locations on the lower left corner of the D77
main circuit card. See Figure 1 .
3. Connect supply power to the appropriate terminal
locations on the upper right corner of the main circuit
card. See Figure 2.
4. Apply power.
5. Verify that the display indicates 0.00 FPS (or 0.0 flow
rate of any other unit). If the display does not register
0.0, then press the 2nd FUNCT key, then press
SIGNAL STR. Verify that SIGNAL STR. is lower than
000100. If SIGNAL STR. is greater than 000100,
verify that the sensor/transmitter are not located near
electrically noisy components. (VFDs, inverters,
motors, power relays, etc) Verify that DT7 transmitter
connections are proper and secure. If the SIGNAL
STR. remains greater than 000100, consult the
Dynasonics Factory for assistance.
6. Press the 2nd FUNCT key to enter SERVICE MODE.
Press the SIGNAL STR key to display SIGNAL STR.
XXXXXX.
7. Tap the rounded black tip of the DT7 transducer on
the side facing opposite the flow direction arrow (the
arrow is located on the top cap of the DT7
Unpacking
Functional Test
Figure 2
Figure 1