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9.5.3.2. The basic indicated error of the measured quantities of measuring channels with input
electric signals in form of direct current is determined in points corresponding to 5 and 95 % of
measurements range, for what:
1) the verified measuring channel is connected to the source of the calibrated currents and
the value of the input signal is set conforming to the verified point;
2) the difference between the indications of the verified measuring channel and the real
value of the measured quantity in the verified point determined by the calibrating curve, should not
exceed the values calculated by the formula (9.1)
9.5.4. Basic indicated error value definition by the record of the measured quantity
The basic indicated error on record of the measured quantity is defined at increasing and
reducing of the measured quantity values. The measured value is defined by the record of the
indications on a diagram and on the digital display board(panel).
9.5.4.1. When the diagram carrier is driven the measured quantity is transferred to the verified
measuring channel consequently changing it up to achieving the chosen value so that the excess of
the given level should be avoided.
For each chosen value the line is written down in the way that the effect of friction appears
infinitely small, that is achieved at the diagram carrier minimum speed expense or by manual
supplying of the diagram carrier
9.5.4.2. Basic indicated error on record of measured quantity is determined by the formula
⋅
=
А
АА
до
з
γ
100, (9.2.)
Where
о
А
- deviation of the RMT writing system at the given value of the input source signal,
mm;
д
А
- rating value of the writing system deviation appropriate to the real value of the
measured quantity, mm;
- nominal width of the field of record of the measuring channel, mm,
should be in the limits fixed in article 3.5 of the present passport.
NOTE. For RMT, which measured quantity ranges and recorded measured quantity
ranges do not coincide, minimum value of the range of the measured quantity
record should not exceed the values designed by the formula
и
АнАв
зАнзАв
γ
..
....
≥−
, (9.3)
Where
..зАв
- the top limit value of the measured quantity record;
..зАн
- the bottom limit value of the measured quantity record;
.в
А
- the top limit value of the measured quantity;
.Ан
- the bottom limit value of the measured quantity;
и
- the basic indicated error of the measured quantity for the given
range of measurements conform to article 3.4 of the present
passport.
The difference between the value read on the normal carrier of the diagram, and the value
read on a digital display panel, expressed in percentage of graduation length (width of the field
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