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About Your eXact
®
Micro 8 Instrument
About The Accuracy/Calibration Of The Micro 8 Photometer System
The eXact
®
Micro 8 Advanced Photometric System has been factory calibrated for your convenience.
Customer calibration for your own special application can be performed in the Transmission Menu. You
can expect the fixed calibrations or algorithms in the meter to be valid for the life of the meter because of
the quality, Long-Life LED, the photo cell, and the software as written into the meter. A blue dye
calibration solution is available for verification of meter performance.
To save power, the meter is designed to turn off after 3 minutes (timed from the last button pressed).
Should the meter turn off, the last stored zero in the meter will remain valid when the meter is turned on
again. The eXact
®
Micro 8 Photometer is controlled by three buttons:
1.
ZERO/ON
: When first pressed, this button turns the meter on. When the meter is on and this button is
pressed, it zeroes the sample in the cell. Once the meter is zeroed, this zero value applies to all menu
parameters and is stored and retained even when meter turns off. It is recommended that each new water
sample analyzed is zeroed before testing, to maximize accuracy.
2.
MENU
: With each press, when the meter is on, the MENU button advances through the tests in the
following sequence: CN1, FE2, NH3, PO4, PH5, SS6, TR7. Each test menu can store up to 20 results. To
retrieve the stored results
, go to the desired test using the MENU key. When the desired test is displayed,
release button and allow meter to display the last test result in that MENU. Then,
press and hold down the
MENU key
. Continue holding down the MENU key to scroll the stored results for that test, starting with the
most recent result. The meter will retrieve from stored memory and display the last 20 readings in sequence
beginning with -20, which is the latest result, followed by -19, which is the 2
nd
latest result … finally -01, which
is the oldest result retained. Only the last 20 readings are stored in each menu. This meter is able to store
140 results in memory (20 in each menu).
3.
READ
: When pressed once, this button starts a
20 or 30 SECOND
countdown timer depending on the
parameter being tested. If READ is pressed a second time during the countdown, the meter exits the current
timing and performs the next function.
If the parameter being measured is below or above the detection range, the display will show “
LO
” (Under
Range) or “
HI
” (Over Range), respectively. This feature is menu specific.
