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Contrast, IR Linkup, Set Clock and Reading
Menu. Within each menu, pressing MENU will
enter each menu option. Any changes made
within a menu will revert the screen back to
the main screen upon completion.
5.0 Calibration
To perform a water calibration, press CAL from
the main screen, apply distilled water to the
well, and press CAL again to calibrate or
MENU to exit. To perform calibrations of other
points, press MENU and then scroll up to the
Calibration screen (shown below). Enter the
Calibration
calibration menu by pressing MENU. The Set
(Water) screen will appear first. Scroll through
(
or
) the calibration menu to find the span
Set (Water)
Span 1.40229
Apply 1.40229
CAL = calibrate
point you wish to calibrate. Only the active
Span calibration points will be visible (up to 4
span points, a minimum of 1). The Set point
(water) is always active. To calibrate the Set
point or an active Span point, press MENU to
enter calibration menu for the particular point,
apply the calibration fluid or distilled water ,
allow 30 seconds to temperature equilibrate,
and press CAL. The example above shows
screens from a 1.40229 Span point calibration.
The message "Set (or Span) point cal
successful" appears when the calibration is
complete. If the calibration can't take place
Set point cal
successful
4
due to insufficient sample or lack of sample, the
message "Image fuzzy or no sample" will
appear. Clean the prism surface and apply fresh
distilled water or calibration fluid. Press MENU
to cancel the calibration and return to the main
screen. Repeat this process for all the active
points you want to calibrate. For optimum
precision, the AR200 requires a 1 point (water)
calibration daily and a 2 point calibration
performed on a routine basis (set and 1 span
point). Unsuccessful calibrations do not alter
current calibration data stored in the AR200.
Activating (Add), editing (Edit), or deactivating
(delete) a calibration point may be achieved
using the Add/Delete/Edit menu within the
Calibration menu. To enter this menu from the
calibration menu, press MENU. Scroll (
or
Add/Delete/Edit
to use the Add, Delete or Edit point functions.
The "Add" point will allow the operator to
activate only the calibration points currently
deactivated. The "Delete" point function allows
for deactivating any point (other than water)
that is currently active. If all span points are
deactivated, the instrument will prompt the
operator to perform a calibration. The AR200
will not function without a set point (water)
AND 1 span point calibration. The set point
(water) will always be active and cannot be
modified.
The AR200's available calibration points are:
Set Point:
1.33299 (distilled water)
Span Pt. 1: 1.40299
Span Pt. 2: 1.45755
Span Pt. 3: 1.48993
Span Pt. 4: 1.51416
The Edit point function allows a new calibration
standard to be used that is not listed. The Edit
point menu will display all the calibration points
and indicate which points are active as
indicated by an (*) next to the index value. If a
new calibration standard is used, you must
enter the refractive index, the reference
temperature, and the temperature coefficient.
This function should not be used by novice
operators.
Leica
recommends
experienced operators consider using the Edit
point option.
6.0 Contrast
This option will allow the operator to adjust
contrast of the LCD screen. With the Contrast
menu on the screen, press MENU to enter the
Adj Contrast menu, then use CAL and READ
keys to adjust the contrast.
7.0 Change Menu
Every AR200 features four basic reading modes
)
to choose from. In the "Change Mode" menu
option, you can switch between nD, Brix, nD-
TC and Brix-TC (TC modes are temperature
compensated). Use the CAL and READ keys to
scroll through the four choices. Press MENU
to choose your preferred reading mode.
Reading Mode
nD-TC
8.0 IR Linkup
This option allows operators to download
reading data and calibration data to a PC and
only
to upload new custom channels (scales) to the
AR200.
This
requires
optional
receiver/transmitter
adapter
connected to a PC and Leica IR-Linkup
software. Attempting the IR Linkup without
these components will result in linkup failure
when connecting. AR200 IR Linkup will not
operate via the IrDA port
found on many
notebook
computers.
Contact
additional instructions and information on
using this exclusive feature.
9.0 Set Clock
This option allows an operator to change time
on the internal clock. Press MENU to enter the
menu, then CAL and READ to change the time
or
date
and
MENU
to
switch
hours/min/secs or month/date/year.
IR
hardware
Leica
for
from
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