7.1.3 Setting Measured Value to Zero, Zero Point Correction
Setting the Measured Value to Zero
The user can zero the measured value at certain locations or at certain times
to check the deviation from the reference value. With the key
FUNCTION
in
switch position
MEAS.VALUE
the display will indicate ´
zeroing -> base
´ and
with the key
CLEAR
the displayed measured value will be stored as base value
and, as a result, be set to zero.
Function:
zeroing -> base
Function:
MEAS.VALUE
Set to zero with keys:
,
FUNCTION
CLEAR
Please note that this function is only available if the locking code is
set below 5 (see 6.8).
The control lamp BASE will be on as long as the deviation from the
base value is indicated, but not the actual measured value.
The base value must be cleared in order to obtain the actual measured value
(see 6.7). For this purpose the rotary switch must be set to the function BASE
and the base value must be cleared with the key
CLEAR
.
Function:
BASE
Clear base value:
CLEAR
Zero Point Correction
Many sensors must be adjusted at least once or at regular intervals to
compensate for instabilities. For this purpose, a specific
zero point correction
is available, in addition to the ´Set Measured Value to Zero´ mentioned above,
as some sensors require an additional scaling (e.g. pH probes). In this function
the zero point error is not stored as base value but as zero point correction
(special cases and slope correction, see 6.6). In this case, the locking mode
must be set below 4 (see 6.8). The zero point correction is performed using the
following keys:
Function:
zeroing -> zero
Function:
MEAS.VALUE
Zero Pt Correct.:
,
,
FUNCTION
FUNCTION
CLEAR
If a base value is programmed the measured value is not indicated
as zero but as the negative base value after the adjustment.
33
ALMEMO
®
5590-2
Continuous Measurement of a Measuring Point
Summary of Contents for Almemo 5590-2 V5
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Page 55: ...ALMEMO 5590 2 54 Notes...
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