Custom Measurements - Signet 9900 Operating Instructions Manual

Custom Measurements

Z
For most vessels, the zero reference point (Z) may be
designated as any height in the vessel.
For horizontal cylinders only, the zero reference point
MUST be the lowest point in the vessel.
L > 0
S
Loc
O(ffset) > 0
Z
(ero)
52 9900 Transmitter
L < 0
L > 0
Z
(ero)
O(ffset) < 0
S
Loc
Defi ning a Custom Tank
1. Determine where the level measurement
should start. This is the zero reference point (Z).
Review the diagram to help select the best option.
2. Determine where you will mount the sensor.
This is S
LOC
information regarding the best location for
the sensor.
3. Measure the distance between Z and S
This is O(ffset).
4. Enter the Offset into the INPUT Mode menu.
Zero reference point (Z):
Z
The point in the vessel where you want the 9900 to
display zero (0 ft, 0 gal. etc.).
• If Z is located below the fl uid surface, the 9900
will display a positive level measurement.
• If Z is located above the fl uid surface, the 9900
will display a negative level measurement.
Sensor Location point (S
The point on the level sensor where the
measurement is taken.
• The pressure sensor measures from the
centerline of the diaphragm.
Z
(ero)
Offset (O):
The distance from Z to S
O(ffset) < 0
• Enter a positive value in the Calibrate menu
if the sensor is located above Z.
• Enter a negative value in the Calibrate menu
S
Loc
if the sensor is located below Z.
• Enter 0 in the Calibrate menu if the sensor is
located at Z.
Level (L):
The distance from Z to surface of fl uid
(displayed as "Level" by 9900).
. Consult the Sensor manual for
LOC
):
LOC
.
LOC
.