WATANABE WPMZ-5, Quick Instruction Manual, Page: 7 / 12

MODEL WPMZ-5-□□□-□□-□□□ 7/12
IM-0834-03
９. SETTING EXAMPLES
The instantaneous followings are some examples for some
necessary setting point and operation methods to perform flow
measurements.
９－１. SETTING EXAMPLE 1
Detecting pulses from a gear wheel which generates 5 pulses
per 1 round by proximity switch (open collector output) and
displays the revolving speed in [rpm].
①
Input type setting
The sensor is an open collector type, therefore “open
collector” should be selected as the input type.
②
Setting for revolving speed
display
For setting of
Instantaneous display coefficient, Number of
rotation per 1 pulse is needed.
・
Calculate the n
umber of rotation per 1 pulse.
Because of 5 [Pulse] per 1 round, therefore,
1/5
＝
2×10
-1
[round]
・
Set ” 2.00000×10
-1
” as the Instantaneous display
coefficient
・
Unit to display is [rpm],therefore, select “Min” for the
instantaneous unit time.
・
By “instantaneous decimal point position”, set the number
of digits after the decimal point.
③
Setup steps
Although setup steps are basically same as “8.BASIC
OPERATION OF SETTING DISPLAY”, setting of
instantaneous display factor is needed, an example is
shown below.
９－２. Setting Example 2
Using a gearbox of 805[rpm] with an open collector output,
displaying the circumferential speed of the roll diameter
350[mm] in [m/min]
（
conditions
）
・
rotation speed 805[rpm]
（
output pulse 60[P/R] built-in
）
・
reduction ratio 1/90
・
roll diameter 350[mm]
①
Input type setting
The sensor is an open collector type, therefore “open
collector” should be selected as the input type.
②
Setting for circumferential speed display
For setting of
Instantaneous display coefficient, travel distance of
rotation per 1 pulse is needed.
・
calculation of circumferential speed
805[rpm] ×1/90× (0.35[m]×3.14)=9.82994[m/min]
・
Cumulate
travel distance per 1 pulse
1/60[P/R]×1/90×
（
0.35[m]×3.14
）＝
2.03518×10
-4
[m/Pulse]
・
Set “2.03518×10
-4
” as the Instantaneous display coefficient
・
Display is in [min],therefore, “Min” is selected for the
instantaneous unit time.
・
By “instantaneous decimal point position”, set the number
of digits after the decimal point.
９－３. SETTING EXAMPLE 3
When maximum flow rate is approx. 40[ℓ/min], using a sensor of
rating 7.5[mℓ/Pulse] (open collector type), instantaneous flow
rate will be displayed in [ℓ/min].
①
Input type setting
The sensor is an open collector output type, therefore select
“open collector” as input type.
②
Setting for instantaneous flow rate display
Set flowrate per 1 pulse as instantaneous display
coefficient
Although instantaneous flow rate will be displayed in
[ℓ/min], the rating of the sensor is 7.5[mℓ/Pulse], it should
be converted to 7.5×10
-3
[ℓ/Pulse].
・
Set the “Instantaneous display factor” as “7.50000×10
-3
”
・
Displayed unit is [ℓ/min], therefore select “Minute” as the
instantaneous unit time.
By “instantaneous decimal point position”, set the number
of digits after the decimal point
９－４. SETTING EXAMPLE 4
Using a sensor (Voltage output type) which outputs 15 [Hz] for
90[ℓ/min], instantaneous flow rate will be displayed in [ℓ/sec].
①
Input type setting
The sensor is Voltage output type, therefore select “LOGIC”
for “input type”.
②
Setting for instantaneous flow rate display
Set flowrate per 1 pulse as “instantaneous display
coefficient”.
・
Calculate number of pulses per 1 [ℓ].
The sensor outputs pulses of 15[Hz] at 90[ℓ/min], therefore,
（
15×60
）
/90
＝
10[Pulse/ℓ] .
・
Calculate flowrate per 1 pulse.
Number of pulses per 1 litter is 10[Pulse/ℓ], therefore,
1/10
＝
1×10
-1
[ℓ/Pulse].
・
Set “1.00000×10
-1
” for the “instantaneous value display
coefficient”.
* Any settings of “1.00000×10
-1
”, “0.10000×10
0
” and
“0.01000×10
1
” for the “instantaneous value display
coefficient” bring same results.
・
Unit to display is [ℓ/sec], therefore, select “Sec” for the
“instantaneous unit time”.
・
By “instantaneous decimal point position”, set the number
of digits after the decimal point.
１０. SETTING OF UNITS
Units are selectable and can be displayed optionally.
If units should be used is not available, custom units up to
6 characters are can be made.
*
For custom units, please refer to the detailed manual which can be
downloaded from our home page.
１０－１. LOCATIONS OF PARAMETERS FOR UNIT SETTING
1st layer 2nd layer 3rd layer
1.input
setting
pulse input A
（
pulse input B
）
Instantaneous display
unit
2 input
calculation
Instantaneous display
unit
MENU
（Measurement display） 1st layer
2nd layer 3rd layer
Moves to setting display(1st layer)by
MENU key.
Moves to 2nd
layer by right
arrow key.
Moves to
instantaneous
display coefficient
by down arrow key.
Moves to 3rd layer
by right arrow key.
3rd layer
4th layer
Moves to
numerical value
setting display
by ENTER key.
Moves to 4th layer
by right arrow key.
ENTER
4th layer（numerical value setting）
Registers selected
numerical value by
ENTER key.
Selects numerical value by arrow
keys (up/down/left/right)
4th layer 3rd layer
Returns to 3rd
layer by left
arrow key.
ENTER
MENU
Returns to 2nd layer
by left arrow key.
Moves to other setting
items by up/down
arrow keys.
Stores selected parameters
and returns measurement
display by MENU key.
4th layer（numerical value setting）