Toshiba TOSVERT VF-AS1 Instruction Manual page 89

[Terminal AM-related parameters]
Title
AM terminal meter selection

AM terminal meter

adjustment
AM output gradient

characteristic
AM bias adjustment

Resolution
Both the terminals FM and AM have a maximum resolution of 1/1024.
With the default settings, FM terminal outputs about 10V (external impedance is ∞) or about 1mA (external
impedance is 0Ω), when running frequency is 80Hz. AM terminal outputs about 10V or about 1mA, when the
output current reading on the operation panel is 185%.
[Example of the calibration of the frequency meter connected to the terminal FM]
* Use the meter's adjustment screw to pre-adjust zero-point.
Key operated
MODE
5
ENT
ENT
MODE
For meter connection, the VF-AS1 inverter has two output terminals; FM and AM, which can be used
simultaneously.
Meter adjustment 1 when the inverter is at rest (adjustment by setting  () to : Fixed output 1)
If it is difficult to calibrate a meter because of large fluctuations of its reading, you may put the inverter out of
operation to make its calibration easier.
It is possible to adjust the meter for the data item selected with the parameter  or . The levels of
items (a) to (d) in the list on the previous page are adjusted, as described below. Refer to the table on the next page
for the calibration procedure.
Adjustment level (a) :The output voltage FM/AM-CC reaches 100% at the maximum frequency ().
Function
Same as  (29:AM output disabled)
–
:Negative gradient (downward-sloping),
:Positive gradient (upward-sloping)
–~%
LED display
Displays the operation frequency.
– (When standard monitor display selection = [Operation

frequency])
The first basic parameter "History function ()" is displayed.

Press either the

Press the ENTER key to display the operation frequency.

Press either the
The meter reading will change at this time but be careful because there will
be no change in the inverter's digital LED (monitor) indication.

The adjustment is complete.  and the frequency are displayed
⇔
alternately.
The display returns to its original indications.
(When standard monitor display selection = [Operation

frequency])
(b) :The output voltage at FM/AM-CC reaches 100% when the reading on the operation panel is 185%.
(c) : The output voltage at FM/AM-CC reaches 100% when the reading on the operation panel is 150%.
(d) :The output voltage at FM/AM-CC reaches 100% when the reading on the operation panel is 250%.
Note:The 100% value of input/output power is the product of √3×200V (400V) × inverter's
rated current.
Adjustment range
or key to select "."
key or the
By setup, before the needle of meter beings to sway, it will take time.
E-28
Default setting
Operation
key to adjust the meter.
[Hint]
It's easier to make the
adjustment if you push and
hold for several seconds.
E6581301

–

