User manual - METER SRP-73-XC
Figure. 9.4 Example of user defined characteristic
9.2.
EXAMPLES OF CALCULATIONS
Example 1: Selection of the permissible input range (“100” mode)
If in “
100
” mode the user sets
“Hi r”
= 10,0%, then permissible input voltages range will
be equal: 0 mV ÷ 110 mV. Upper border of the range is the result of calculations:
100 mV + 100 mV × 10%.
Example 2: The normalized U
n
result calculation
Let the input mode = 0-100 mV. The normalized U
n
result is calculated accordingly to the
expression on page 33, so if U
in
= 37.5 mV then 37.5 mV - 0 mV = 37.5 mV, and this result
should be divided by the width of input range (100 mV). Finally the normalized result:
U
n
= 37.5/100 = 0,375.
In case when input voltage exceeds nominal measurement range, calculations are similar. For
example if input voltage is equal -9.38 mV then U
n
= -9.38/100
@
-0,0938, and if input voltage is
equal 103,13 mV then U
n
= 103.13/100 = 1.0313.
Example 3: The linear characteristic
Let the input mode = 0-100 mV, and parameters
“Lo C”
and
“Hi C”
equal to -300 and 1200
respectively. The calculations will be done for three different input voltages from example 2.
36
D
is
pl
ay
ed
v
al
ue
Prąd wejściowy [mA]
0
20
40
60
80
10
0
Y (PH)
0
0,2
0,35
0,5
0,7
1
0,9
Y (PL)
X = „20.0.”
X = „35.0.”
X (PL) = „50.0.”
X (PH) = „70.0.”
X = „90.0.”
X = „100.0.”
Input voltage [mV]
Normalized measurement U
n
(for 0-100 mV range)
5-elements characteristic
Summary of Contents for SRP-73-XC
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