Eldex Optos 1HM, Operator'S Manual, Page: 21 / 41

15
press the Δ
MENU
key twice. Use the
UP
or
DOWN
arrow key to increase or decrease the low pressure limit. To
return to the main screen, press the
DISPLAY
key.
When the low pressure limit is violated, the pump stops running, the lower red LED lights and the display shows
LO PRESS XXXX
.
Configuration Screens
To access the configuration screens, hold the
DISPLAY
key while pressing the Δ
MENU
key. To cycle to the next
command, press the Δ
MENU
key.
Setting the Compressibility Compensation Factor
Various fluids have different
compressibilities at different pressures.
You can adjust for compressibility by
setting the compressibility compensation
factor. The default setting is 0. The
maximum setting is 60. Each increment
increases motor speed by approximately
1%.
To change the compressibility compensation factor, hold the
DISPLAY
key and press the Δ
MENU
key (from the
main display), or, when in the configuration screens press the Δ
MENU
key to display the “compress” screen. Use
the
UP
or
DOWN
arrow key to increase or decrease the compressibility compensation factor. To return to the
main screen, press the
DISPLAY
key.
Sending the Piston to the Home Position
The piston can be sent to the fully forward
position, useful when changing piston
seals.
To send the piston to the forward position,
hold the
DISPLAY
key and press the
Δ
MENU
key (from the main display). Press the
RUN
key. The motor will drive the piston to the home position.
To return to the main screen, press the
DISPLAY
key.
Changing the Refill Rate Setup
Optos pumps can be set to a variety of refill:output ratios. The default setting, refill: full out, optimizes the ratio
for minimal pulsation throughout the flow
rate range, by minimizing the refill portion
of the duty cycle. Other settings are:
refill: 15 out: 85 (sets the ratio to 15:85),
refill: 30 out: 70 (sets the ratio to 30:70),
refill: 50 out: 50 (sets the ratio to 50:50),
refill: 70 out: 30 (sets to ratio to 70:30).
To change the refill rate, hold the
DISPLAY
key and press the Δ
MENU
key (from the main display), or, when in the
configuration screens press the Δ
MENU
key to display the “refill” screen. Use the
UP
or
DOWN
arrow key to
change the refill:output ratio. To return to the main screen, press the
DISPLAY
key.
Setting the Liquid End Type (Piston size and Liquid End material)
Optos pumps can have one of several different liquid ends and pistons installed. When shipped from the factory,
the setting is for the model purchased.
COMPRESS: XX
C
Hold
DISPLAY
& press Δ
MENU
key
from main display, press Δ
MENU
key
Use
UP
and
DOWN
keys to set
Press
DISPLAY
key to return to
main display
REFILL: FULL OUT
R
Hold
DISPLAY
& press Δ
MENU
key
from main display, press Δ
MENU
key
Use
UP
and
DOWN
keys to set
Press
DISPLAY
key to return to
main display
Hold
DISPLAY
& press Δ
MENU
key
from main display
Press
RUN
to send piston to home
(forward) position
GO HOME: HIT RUN
HP