Press either Key to select | Toshiba VF-AS1 guide

			E6581301
[Terminal AM-related parameters]
Title	Function	Adjustment range	Default setting
	AM terminal meter selection	Same as (:AM output disabled)
	AM terminal meter adjustment	–	*1
	AM output gradient	: Negative gradient (downward-sloping),
	characteristic	: Positive gradient (upward-sloping)
	characteristic	: Positive gradient (upward-sloping)
	AM bias adjustment	–~ %
*1: Default setting value is adjusted for connection of frequency meters "QS60T".
	(Between AM and CCA: Approx. 3.6V)

■Resolution

Both the terminals FM and AM have a maximum resolution of 1/1024.

!With the default settings, FM terminal outputs about 4.7V (external impedance is ) or about 1mA (external impedance is 0), when running frequency is 80Hz. AM terminal outputs about 4.7V 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	LED display				Operation
–		Displays the operation frequency.
–		(When standard monitor display selection = [Output frequency])


MODE		The first basic parameter “History function ()” is displayed.

		Press either the	or	key to select “.”

ENT		Press the ENTER key to display the operation frequency.

		Press either the	key or the		key to adjust the meter.
		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.

						[Hint]
						It's easier to make the
						adjustment if you push and
						hold for several seconds.
						hold for several seconds.

		!By setup, before the needle of meter beings to sway, it will take time.
ENT	⇔	The adjustment is complete. and the frequency are displayed
		alternately.
MODE		The display returns to its original indications.
MODE		(When standard monitor display selection = [Output frequency])

!For meter connection, the VF-PS1 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,

: Fixed output 2, : Fixed output 3)

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 . Adjustment levels (a) through (d) shown in the table on the previous page change according to the settings of fixed outputs 1 through 3, as shown in the table below. Use this table as a reference when calibrating the meter(s).

Values adjusted with fixed outputs are put out from the FM (AM) terminal when values in the table are used for operation. For examples of adjustments, see the next page.

Fixed output 1 comes in handy for adjusting items at adjustment level (a) or (c). Fixed output 2 comes in handy for adjusting items at adjustment level (b). Fixed output 3 comes in handy for adjusting items at adjustment level (d).

		Meter adjustment
Adjustment level	Fixed output 1	Fixed output 2	Fixed output 3
Adjustment level	()#	()#	()#
	()#	()#	()#
(a)	*2	54%	40%
(b)	185%	100%	74%
(c)	150%	81%	60%
(d)	250%	135%	100%
*1: The 100% value of input/output power is the product of		3 ×200V (400V) × inverter’s rated current.

*2: When ()=,,~,~,~, fixed output level is 100%.

E-29

Toshiba VF-AS1 Press either Key to select, Press the Enter key to display the operation frequency

Models: VF-AS1

E6581301

Default setting

The first basic parameter “History function ()” is displayed.

Press either the

key to select “.”

Press the ENTER key to display the operation frequency.

The adjustment is complete. and the frequency are displayed

The display returns to its original indications.