Azbil ALTJ 9000 Series, User Manual, Page: 32 / 68

7-4
Chapter 7 Operation
7-2 Starting and Stopping the Operation
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Preparation Prior to Operation
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Minimum Liquid Level Position (Zero Position)
The zero position of the liquid level is the diaphragm position on the bottom of the probe
of this device. Therefore, the measuring range is from the diaphragm position (the groove
in the probe cover) to the height of the operating range. To check the zero point, lower the
liquid level below the level of the diaphragm.
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Zero Adjustment
Communicate with the transmitter using the communicator.
If the liquid level inside the tank can be adjusted to the lower range value (0 %) of the mea-
suring range, perform zero-span adjustment using input pressure equivalent to the range
(
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Zero-span Adjustment Using Input Pressure Equivalent to the Range ).
If the liquid level inside the tank cannot be adjusted to the lower range value (0 %) of the
measuring range, perform zero span adjustment using the actual level when measuring the
liquid level (
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Zero-span Adjustment Using Input Pressure Equivalent to the Range ).
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Zero-span Adjustment Using Input Pressure Equivalent to the Range
You can set the LRV (input pressure at 0 % output) and URV (input pressure at 100 %
output) corresponding to the actual pressure by applying a pressure equivalent to the
desired range.
The LRV and URV will be set automatically using the desired liquid level or input pressure, complet-
ing the zero-span adjustment. For details, refer to the user's manual for CommStaff shown below.
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Field Communication Software CommStaff Model: CFS100 Instruction Manual (Smart
ALTJ™ 9000 Immersion-type Liquid-Level Device Edition), No. CM2-CFS100-2014
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Zero Adjustment Using Actual Level when Measuring the Liquid Level
To adjust the zero point while measuring the liquid level, the liquid level is not actually set
to zero, but rather is adjusted to the output value corresponding to the actual level from
the liquid level as actually measured using a level gauge, etc. For details, refer to the user's
manual for CommStaff shown below.
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Field Communication Software CommStaff Model: CFS100 Instruction Manual (Smart
ALTJ™ 9000 Immersion-type Liquid-Level Device Edition), No. CM2-CFS100-2014
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Adjustment of Meter Pointer Position
Insert a flat-blade screwdriver into the groove at the lower portion of the meter
( Fig. 7-3)
, and turn it to adjust the pointer position of the meter to the output value.
Fig. 7-3. Adjustment of meter pointer position
Turn with a screwdriver.