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Appendix 9 Zero Adjustment
A
17
Appendix
To perform zero adjustment appropriately
Table 1 shows the correct and wrong connections. The resistances in the figure
indicate lead resistances; there will be no problem if they are less than few
respectively
In (a), if you connect H
POT
and L
POT
as well as H
CUR
and L
CUR
respectively, and use
one path to make connection between POT and CUR, no potential difference occurs
between H
POT
and L
POT
, and 0 V is input. This enables zero adjustment to be carried
out correctly.
In (b), on the other hand, if you connect H
POT
and H
CUR
as well as L
POT
and L
CUR
respectively, and use one path to make connection between Hi and Lo,
I
×
R
Short
voltage occurs between H
POT
and L
POT
. For this reason, the pseudo 0
connection
state cannot be achieved and zero adjustment cannot be carried out correctly.
Table 1: Connection methods
(a) Use one point each between
POT and CUR for connection
(b) Use one point each between
Hi and Lo for connection
Resistance between
H
POT
and
L
POT
R
SEH
+
R
SEL
R
SEH
+
R
Short
+
R
SEL
Measurement current
I
's
flow path
R
SOH
R
SOL
R
SOH
R
Short
R
SOL
Voltage occurring
between
H
POT
and
L
POT
0
I
×
R
Short
As connection method for
zero adjustment
Correct
Wrong
Connection
methods
Содержание RM3542
Страница 2: ......
Страница 6: ...Contents iv ...
Страница 16: ...Operating Precautions 10 ...
Страница 26: ...1 3 Screen Organization 20 ...
Страница 32: ...2 3 Turning the Power On and Off 26 ...
Страница 46: ...3 8 Confirming Faulty Measurements 40 ...
Страница 64: ...4 12 Compensating for Thermal EMF Offset Offset Voltage Compensation OVC 58 ...
Страница 84: ...6 4 Auto Exporting Measured Values at End of Measurement Data Output Function 78 ...
Страница 90: ...7 3 Printing 84 ...
Страница 172: ...9 10 Device Compliance Statement 166 ...
Страница 190: ...11 4 Disposing of the Instrument 184 ...
Страница 200: ...Appendix 5 Dimensional Diagram A10 Appendix 5 Dimensional Diagram ...
Страница 214: ...Index Index 4 ...
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