DKS PD96, Руководство пользователя, Страница: 46 / 57

User manual for meter with U/I input PD96
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Example 3: The linear characteristic
Let the input mode = 4-20 mA, and parameters
“Lo C”
and
“Hi C”
equal to -300 and
1200 respectively. The calculations will be done for there different input currents from
example 2.
a) Iin =10 mA and In = 0,375
Accordingly to expression on page 37 for linear characteristic:
0,375 × [1200 -(- 300)] @ 562 and next, the
“Lo C”
value is added to the result ,
so the displayed value:
W @ 562 + (-300) = 262
b) Iin = 2,5 mA and In = -0,0938.
W @ -441.
c) Iin = 20,5 mA and In = 1,0313.
W @ 1247.
Example 4: The square characteristic
Let the input mode = 4-20 mA, and parameters
“Lo C”
and
“Hi C”
equal to -300 and
1200 respectively. The calculations will be done for there different input currents from
example 2.
a) Iin =10 mA and In = 0,375
Accordingly to expression on page 37 for linear characteristic: (0,375)2 × [1200 -(-
300)] @ 211. and next, the
“Lo C”
value is added to the result , so the displayed
value:
W @ 211 + (-300) = -89
b) Iin = 2,5 mA and In = -0,0938.
W @ -287.
c) Iin = 20,5 mA and In = 1,0313.
W @ 1295.
Example 5: The square root characteristic
Let the input mode = 4-20 mA, and parameters
“Lo C”
and
“Hi C”
equal to -300 and
1200 respectively. The calculations will be done for there different input currents from
example 2.
a) Iin =10 mA and In = 0,375
Accordingly to expression on page 38 for linear characteristic:
sqrt(0,375) × [1200 -(- 300)] @ 919. and next, the
“Lo C”
value is added to the
result , so the displayed value: