HF scientific Micro200BW Turbidimeter - 0-100 NTU - Manual (Page 24)

MICRO 200 BW 0-10 & 0-100 NTU (05/05)
Rev. 3.4
particles in suspension (turbidity). The optical signal
from the photodiodes is amplified and then converted to
a frequency. This frequency is dependent upon the NTU
level of the sample in the sample well. The resultant
signal is sent to the analyzer where it is linearized for
presentation on the display.
All operator controls are located on the front panel of
the MICRO 200 BW. Complete displays include LCD
indicators which blink in the event of an alarm of the
two user set alarms and a sensor alarm.
Each feature is clearly labeled and you will be taken,
step-by-step, through each one later in this section. This
approach ensures EASY use of the HF scientific,
inc., MICRO 200 BW.
One of the most important features of the MICRO 200
BW is the ease of operation. You simply press the
Function Key, <F1-F4> for the selection you want to
access on the LCD screen.
The information contained in this manual will help
users take full advantage of the MICRO 200 BW’s
capabilities. In the event that unusual circumstances
arise that are not addressed in the manual, contact your
local distributor. Our engineering staff is also available
to help you with your specific needs.
The ROM program used in the MICRO 200 BW con-
tains confidential information which is the property of
HF scientific, inc. Unauthorized disclosure, distribu-
tion or copying is prohibited. COPYRIGHT © HF
SCIENTIFIC, INC. All rights reserved.
3.2 MENU GUIDE TO THE MICRO 200 BW
The following pages guide you through the menus in
MICRO 200 BW and provide insight on how to use each
of them. Probably the best way to learn the system is by
“hands on training”. After reading this section in its
entirety the user should follow through each of the
menus on the MICRO 200 BW. The user will find that
each of the menus is arranged in a logical manner. After
going through each of the menus once he will gain a
familiarity with the structure. Each function is clearly
labeled. A menu flow chart figure 26 is provided on page
45 for further clarity.
The functions of F1-F4 will vary according to the menu.
The function will be shown beside each button. The
absence of a function beside a button indicates that the
button is not used in that menu.
Page 12
This button is also used to return to the
turbidity display once you have made
your selections.
Menu
Turns alarm contacts to “OFF”. Once an
alarm condition is met, the display will
continue to flash until the alarm condition
is removed. Once the alarm level has been
exceeded, either Hi or Lo, the alarms will
reset when the alarm condition has returned
to non-alarm value, including the dead
band value.
Once the alarm button is pushed the alarm
relay is inactive until the reading has once
again reached a non-alarm value (keep in
mind the dead band value). After this the
alarm level must be once again exceeded
before the alarm contacts can again close.
Display will change to the next highest level
or previous menu. If this button is pushed
several times you will always return to the
Main Menu.
Used to scroll up or down through
the values of the selected parameter.