Yokogawa PR300 Power and Energy Meter - Manual (Page 23)

3-2 IM 77C01E01-01E
3.2 Setting the VT and CT Ratios
Setting the VT Ratio
This section explains how to set the VT ratio by taking as an example the case when the VT ratio is
changed from the initial value (1) to 4.
Operation Operation
Hold down for at
least 3 seconds.
The parameter (VT ratio)
appears.
The screen changes to the one
for setting the parameter
and the alterable digit blinks.
Measured Value screen
VT Ratio screen
VT Ratio Setting screen
VT Ratio Setting screen
VT Ratio Setting screen
VT Ratio screen
1
3
4
Press once.
2
Using or ,
change the setpoint.
When proceeding to set the CT
ratio, press once and start
from step
3 in “Setting the CT
Ratio.”
To return to the Measured Value
screen, hold down .
If you do not operate any key for more
than 5 minutes on the Parameter
screen, the PR300 automatically
returns to the Measured Value screen.
Current value
Setpoint
Press once to
blink the setpoint.
Press once while
the setpoint is blinking.
5
The setpoint is confirmed and the
PR300 returns to the VT Ratio screen.
VT ratio setting completed.
To move to the digit to be changed,
use the following keys:
To the left To the right
To re-set the parameter:
Press any key other than
while all digits of the
setpoint are blinking.
The PR300 returns to the initial
setting screen.
Parameter Setting Types and Ranges
Parameter Symbol Parameter Name
Setting
Type
Setting Range (Details)
Initial value
(Factory-set
Value)
VT ratio
Integral
numeric
value
1 to 6000 1