L
M
O
P
S
T
Layer
Layer
Layer
This is a display option. It gives the
Layer
thickness of top product. The layer must
be more than 50 mm or 2
¨
for accurate measurement of level and/or
interface. Refer to the diagrams at the end of this section.
Level
Level
Level
This is a display option. It is the he
Level
ight from the bottom of the tank (user-
defined) to the surface of the top product (Tank height
–
distance). Refer to
the diagrams at the end of this section.
Mass
Mass
Mass
This is a display option. It shows the total mass of tank contents. Use a
Mass
mass table or a volume table to display measurement data with mass
units.
Measurement pulse
Measurement pulse
Measurement pulse
The device transmits a short, low-powered electrical pulse or wave
Measurement pulse
transmitted down a guide to the process. The process (or the probe end if
in TBF measurement mode) reflects the pulse back to the device.
Operators
Operators
Operators
Operators
Users who can choose how to display measurements. They cannot
configure the device in supervisor mode.
Probe
Probe
Probe
Probe
This is either a metallic cable or rod used to guide the measurement pulse
to the process.
Probe length
Probe length
Probe length
Probe length
Ordered length of probe, L, from the face of the flange to end of the guide. If
you ordered a cable probe, this includes the counterweight. Refer to the
diagrams at the end of this section.
Sensor length
Sensor length
Sensor length
Sensor length
Length, L', of from the face of the flange to end of the guide. If you ordered
a cable probe, this does not include the counterweight. Refer to the
diagram at the end of this section.
Supervisors
Supervisors
Supervisors
Supervisors
Users who can configure the device in supervisor mode. They cannot
configure the device in service mode.
TBF mode
TBF mode
TBF mode
TBF mode
Tank Bottom Following (TBF) mode. If the product has a low dielectric
constant, use this mode. TBF mode uses the end of the probe to indirectly
measure the tank contents.
TDR
TDR
TDR
TDR
Time domain reflectometry (TDR). The principle used by the device to
measure level and interface. For more data, refer to
Measuring principle
on page 127.
Threshold
Threshold
Threshold
A number of limits set either manually or automatically by the signal
Threshold
converter to identify the reflected measurement pulses from the level, the
interface and the probe end. Also refer to
Thresholds and parasitic signals
on page 92.
Top dead zone
Top dead zone
Top dead zone
The distance from the flange to the top limit of the measuring range. Also
Top dead zone
refer to
Measurement limits
on page 141.
Technology Solutions
Instruction Manual
Tek-Flex
4100A
www.tek-trol.com
1
53
