20
21
・
When both right and left arrow buttons are pressed simultaneously, Signal
Output of 20mA will be produced irrespectively of the measurement value.
CAUTION:
Fine Adjustment of Upper Limit 20mA
2
2
1
While making sure of the values displayed by the
connecting equipment such as recorder, make the Fine
Adjustments of the Upper Limit 20mA with the up and
down arrow buttons .
Simultaneously press both right and left
arrow buttons .
At this time, "-20-" is indicated in the
Display. And, "ZERO" comes on and
"SPAN" blinks.
4
Press to terminate the Fine Adjustments of the Upper
Limit 20mA.
Reference
・
To cancel the Fine Adjustment of the Upper Limit 20mA, press .
＋
At this time, after making sure that the indicated values and
measured values by the official method have linear relationship
as shown below, calculate a Span-Adjusted value using
displayed values and measured values as close as possible to
the Span-Adjusted value.
Examine the correlation between values measured by the official
method and the values indicated by SC-T4 at a place where the
instrument is installed.
Indicated values
Indicated values
1
2
The following calculating formula is used.
Span setting value = [Present Span-Adjusted value] x Measured
value (official method)/Indicated value (SC-T4).
Notes: The Span-Adjusted value set 1000 as a factory setting.
3
The Span-Adjusted value is changed into the following value by
referring to page 12([5] Operation (3) 0(ZERO)/Span-Adjustments).
When the indicated value is 800 mg/l and the measured value
according to official method is 600mg/L:
Span-Adjusted value =1000x600/800=750
・
In the case of the Present Span-Adjusted value is 1000.
4
8
Measured v
alues b
y
the official method
Measured v
alues b
y
the official method
・
When Err4 or Err5 is displayed, the value is out of the setting range. The
available setting range of Span-Adjusted value is from 200 to 3000 mg/l.
CAUTION:
7
Correction
Depending on the measuring environment, indicated value may differ
from the value by the official method. In this occation, correct the
indicated value using the Span-Adjustment function according to the
following procedure.
