Siemens MAG 1100, Operating Instructions Manual, Page: 405 / 665

7ML19981FB05 MultiRanger 100/200 – INSTRUCTION MANUAL Page 231
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Appendix C:
Tr
oubleshoot
ing
General Appendix C: Troubleshooting
If the setup becomes too confusing use P999 to reset and start again.
Common Problems Chart
Note:
Many of the parameters and techniques described here require extensive
knowledge of ultrasonic technologies and Siemens Milltronics echo processing
software. Use this information with caution.
Symptom Cause Action
Display blank, transducer
not pulsing.
No power.
Check power supply, wiring, or
power fuse.
No response to program-
mer. Obstructed infrared interface,
defective programmer.
Check programmer usage:
15 cm (6”) from faceplate
pointed at upper target.
Displays Short and tb:(#).
Short circuited transducer cable,
or defective transducer at indi-
cated terminal block number.
Repair or replace as necessary.
Displays Open and tb:(#).
Transducer not connected or con-
nection reversed. Check connection to displayed ter-
minal blocks.
Open circuited transducer cable,
or defective transducer at indi-
cated terminal block number.
Repair or replace as necessary.
Displays LOE. Weak or non-existent echo.
Relocate and/or re-aim transducer
at material.
Proceed to Measurement Difficul-
ties.
Displays Error and tb:(#).
Wrong transducer selected
(P004). Verify transducer type and re-enter
value.
Transducer connected in “two
wire” method. Do not tie white and shield together.
Use all three terminal blocks.
Transducer connected back-
wards. Reverse black and white wires on
terminal block.
Displays EEEE
Value too large to display in 4 or 5
characters. Select larger Units (P005), or lower
Convert Reading (P061).
Reading fluctuates while
material level is still (or
vice versa).
Incorrect measurement stabiliza-
tion.
Alter Maximum Process Speed
(P003) or damping (P704) accord-
ingly. See
Maximum Process Speed
.
Reading is fixed, regard-
less of the actual mate-
rial level.
Transducer acoustic beam
obstructed, standpipe too nar-
row, or transducer ringing (reads
over 100%).
Relocate and / or re-aim transducer
at material level or object.
Proceed to Measurement Difficul-
ties below.
See also:
Transducer Ringing
.
Material level reported is
always incorrect by the
same amount. Incorrect Empty (zero) reference
for level operation
(P001 = 1). See Empty (P006), Reading Offset
(P063), Offset Calibration (P650), &
Offset Correction (P652).
Measurement accuracy
improves as level nears
transducer.
Incorrect Sound Velocity used for
distance calculation.
Use a transducer with a built-in tem-
perature sensor or a TS-3 tempera-
ture sensor.
See
Sound Velocity
.
Reading is erratic, with
little or no relation to
material level.
True echo too weak or wrong
echo being processed.
Relocate and / or re-aim transducer
at material.
Check noise parameters. See
Noise
Problems
.