Shimadzu EI-D1003M, Instruction Manual

Page: 52 / 123

6.5 Variable Speed Operation
39
Power Supply Unit
INSTRUCTION MANUAL
6
6.5
Variable Speed Operation
CAUTION
When using the variable speed function to change the pump rotation rate, use a rotation rate
that does not cause resonance with other devices installed at the site.
CAUTION
If an EI-Dxx03M power supply unit is used in combination with an existing pump that was
operated in combination with a power supply unit not having the variable speed function (EI-
xx03MD), the variable speed function cannot be used. (the "xx" number indicates the model of
the corresponding pump.)
If the power supply unit is to be combined with an existing pump, modification and operational
inspections are necessary. Please contact Shimadzu for detailed information.
6.5.1 Outline
(1) The rotational speed settings function sets the rotational speed by selecting between the
NORMAL speed mode or LOW SPEED mode.
(2) Select the NORMAL mode or LOW SPEED mode by LOCAL operation using the setting
mode/rotational speed settings/speed setting set value on the LCD display or by REMOTE
operation using the remote-control connector "LOW SPEED" signal input (see Table 6-3).
(3) The NORMAL mode or LOW SPEED mode selection can be made before or after start-
up. (See the Speed Setting Flowcharts in Figs. 6-4, 6-5, and 6-6.)
(4) Set the low speed value between 25% and 100% of the rated speed in 0.1% increment
with the setting mode/rotational speed settings/low speed setting set value on the LCD
display.
(5) The low speed value can be set while the pump is rotating in the LOW SPEED mode. The
pump then accelerates or decelerates to the new set value and maintains the set speed.
(6) The time required for the speed to change is the same as the time for normal acceleration
or deceleration.
For example, if the low speed value is set to 80% and the LOW SPEED mode is selected
during normal rotation, the time for the speed to drop to 80% is approximately one-fifth the
time required to stop from rated speed.