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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 ]
- 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)
30
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
therefore A = 6001 and b = -2 (10
"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)
FUNCTION
MEASUREMENT
(oPr)
Rotational
F1, F2
Speed
F3, F4
Linear Speed
F1, F2
(circumferential
F3, F4
speed)
(1)
Frequency
F1
b
-2
0.01)
UNIT
TIME BASE
PULSE / REVOL.
(display)
(t.bA)
(PU.1) (Pu.2)
RPS
1
1
RPM
60
1
RPH
60
1
1
mm/s
1
cm/s
1
1
m/s
1
1
mm/min
60
1
cm/min
60
1
60
1
m/min
1
1000 *
mm/h
60
cm/h
60
1
m/h
60
1
km/h
60
1
MPH
60
1
1
n
Hz
0,1
n
kHz
PRESCALER
(PS.1) (PS.2)
1
60
3600
1000 *
* d
100 *
* d
* d
1000 *
* d * 60
100 *
* d * 60
* d * 60
* d * 3600
100 *
* d * 3600
* d * 3600
* d * 3.6
* d * 2.23
n
n / 1000
31
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