GRAPHTEC GL840 - Page 107

3-31
CHAPTER 3 Settings and Measurement
(1) -11 EU (Scaling settings)
This is used to convert the measured signals to other units. This setting is available only if Pulse is selected in (1)-7.
(1)
(2) (3) (4) (5) (6)
Setting Description
(1) EU Function Sets the scaling function to ON or OFF.
(2) Meas. Value Sets a value to be converted.
(3) EU Value Sets an output value after conversion.
(4) Select Selects a specic engineering unit classication.(The following are available.)
Cur, Length, Area, Volume, Velocity, Accel, Freq, Mass, Energy, Pressure, Flow , Temp,
Strain, Brightness, Concentration
(5) Unit Selects a unit to be used after conversion.
A unit displayed in this eld belongs to the classication selected in "Select." To set a unit not
displayed in this eld, set arbitrary text in "Arbitrary unit."
The setting selected in this eld is displayed in "Arbitrary unit."
(6) Choose Sets a unit to be used after conversion.
Arbitrary text consisting of alphabetical characters and numerical values can be set as a unit.
(For the character input, refer to "(8) Character string input" in “3.4 Setting Menus”.)
When “Select Unit” or “Unit” is specied, it is reected in here.
When "Select" or "Unit" is used, the setting is reected in this eld.
•
If a message window opens, follow the instruction in the message to change the setting value.
•
The Scaling function performs calculation using a ratio of the Meas. Value and EU Output Value settings.
•
The digital display shows “++++/----” when the converted value cannot be processed by the GL840.
•
The span may be varied depending on the scaling settings.
EU Output ValueMeas. Value
8001000
2000
Dec pt
+ xx.xx
Choose
rpm
1000
CH.1
0
800
CH.1 Scaling 1
0
Setting example
(1)-12 Misc.
<For Logic>
(1)
(3)
<For Pulse>
(1)
(2)
(3)
(4)
Setting Description
(1) Waveform Color Setting 0 to 31 for each of red, green, blue (RGB)
(2) Amplitude Setting 1 to 8 dots
(3) Trace This is used to set the waveform display.
(4) Pulse per revolution 1 to 10000
When setting the pulse input to the number of revolutions, set the number of pulses per
revolution.
As the number of pulses per revolution set here is 1 revolution, the number of revolutions per
minute (RPM) is calculated.calculated. For example, if “100” is set, 1 rotation is judged when
100 pulses have been input.
<Calculation formula>
Number of revolutions (RPM) = Pulse input frequency ÷ Number of pulses per revolution x
60 (1 minute)
<Example>
Number of pul ses per revolution: 100 (1 rotation is judged when 100 pulses have been input.)
Pulse input: 1000 Hz (1000 pulses per sec.)
Number of revol utions: 600 RPM (600 rotation per min.)