31
ENGLISH
30
ENGLISH
that means: PS = (value to be displayed * Pu.1) / (Fa - Fb), that makes:
(100 * 4) / 6.66 = 60.06, that means: 60.06=A*10
b
therefore A = 6001 and b = -2 (10
-2
→
0.01)
•
"Pu.2": the number of "pulses per revolution", of channel "B", is in our
case "4", therefore "Pu.2" becomes 4.
•
"dSY": to show on the display 100.0 we have to move the decimal point
to "111.1";
•
"Lo": see the proper explanation on the next pages;
•
"Hi": see the proper explanation on the next pages:
Parameter table (suggested values)
Rotational
Speed
FUNCTION
(oPr)
MEASUREMENT
RPS
RPM
RPH
UNIT
(display)
TIME BASE
(t.bA)
PULSE / REVOL.
(PU.1) (Pu.2)
PRESCALER
(PS.1) (PS.2)
Linear Speed
(circumferential
speed)
F1, F2
F3, F4
1
60
60
1
1
1
mm/s
cm/s
m/s
mm/min
cm/min
m/min
1
1
1
60
60
60
F1, F2
F3, F4
cm/h
km/h
MPH
60
60
60
1
1
1
Hz
kHz
1
0,1
Frequency
F1
m/h
60
60
mm/h
1
1
1
1
1
1
1
1
n
n
1
60
3600
π
* d * 3600
π
* d * 3.6
π
* d * 2.23
1000 *
π
* d
100 *
π
* d
π
* d
1000 *
π
* d * 60
100 *
π
* d * 60
π
* d * 60
1000 *
π
* d * 3600
100 *
π
* d * 3600
n
n / 1000
0.15 sec., therefore the "t.bA" would be "0.15", better if "0.2".
•
"oPr": to perform the measurement of a "speed difference" you have
to choose the "F2" function
•
"SCA"
•
"Pu.1": the number of "pulses per revolution" of channel "A", is in our
case "4", therefore "Pu.1" becomes 4.
•
"PS.1": the prescaler of channel "A", formed by the two sub-param-
eters "A1", mantissa, and "b1", exponent. It must be equal to the
prescaler of channel "B", "PS.2".
•
"Pu.2": the number of "pulses per revolution", of channel "B", is in our
case "4", therefore "Pu.2" becomes 4.
•
"PS.2": the prescaler of channel "B", formed by the two sub-param-
eters "A2", mantissa, and "b2", exponent. It must be equal to the
prescaler of channel "A" and can be calculated in the following way:
the maximum read-out capacity of the instrument is 9999, that
means the minimum speed difference (given subtracting the max.
speed of channel "A" and the one of channel "B") can be shown as
100.0 "RPM". We want to measure "100" but to have the maximum
speed resolution we have to display 1000 (don't consider the deci-
mal point). The calculation made by the instrument according to
function selection "F2" is the following:
value to be displayed = [(Fa * PS.1) / Pu.1 - (Fb * PS.2) / Pu.2 ] (1)
- PS.1 = PS.2 = PS that means: A1 = A2 = A and b1 = b2 = b
- Fa according to the frequency of 700 RPM is 46.66Hz;
- Fb according to the frequency of 600 RPM is 40.00Hz;
the prescaler can be calculated from the above mentioned formula (1)
Summary of Contents for MDI 40 TF - CONFIGURATION SOFTWARE
Page 1: ......
