YOKOGAWA Power Series Plus 2493, Руководство пользователя

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5. CHANGING SETTINGS
IM 2493WVP-1
18
For Output 3 (Power Factor):
Defaults Input
LO3 HI3
Range Limits Span
Minimum
All 0-1 mA units 1.000 0.000
Lead 0.000 Lag – 1 – 0.000
Lead 0.250
All 4-20 mA
units 0.000
Lag 0.000
Lead 0.000 Lag – 1 – 0.000
Lead 0.250
The above values are without any scaling by the PT ratio or CT ratio. If the PT
ratio is greater than 1 to 1, than the output setting values for watts and VARs
above must be multiplied by the PT ratio. For example, if the PT ratio is changed
to 3 to 1, then all the values in the chart above will be multiplied by 3. Likewise, a
change in the CT ratio will proportionally change the values in the chart above.
Power Factor is not affected by the transformer ratios.
You cannot set a value lower than the minimum LO or higher than the maximum
HI.
The span between the LO and HI must not be smaller than the minimum span.
So with a 2 Wire 120V 1A wattmeter, you could set the LO to 0 and the HI to 50.
Or you could set the LO to 110 and the HI to 160. But you could not set the LO
to 60 and the high to 90. 90 minus 60 is less than 50.
If a value is too low you will get the error “ErrL”. If the value is too high you will
see the message “ErrH”. If the span is not big enough or if the span is too big
(goes out of range) the message is “ErrS”.
If the input is greater than the HI setting the output will match it until it reaches
the limit of the unit. For a 0-1mA unit that limit is 1.06mA. For a 4-20mA unit that
limit is 20.96mA. Likewise, if the input drops below the LO setting, the lower end
of the output is limited to 3.04mA for a 4-20mA unit and –1.06mA for a
±
1mA
unit. A 0-1mA unit can never go below 0mA.