LaMotte 2020t BLE Mode D'emploi page 44

15. Always insert tube into the meter chamber with the same amount of pressure and to
the same depth.
16. Occasionally clean the chamber with a damp lint-free wipe, followed by a Windex
dampened wipe. A clean chamber and tubes are essential for reliable results.
17. For the greatest accuracy during the calibration procedure, be sure that after the
meter is blanked and the blank is scanned as a sample, the reading is 0.00. If not,
reblank the meter and scan the blank again until it reads 0.00. When scanning the
calibration standards as the sample, scan the calibration standard three times
removing the tube from the chamber after each scan. The readings should be
consistent. Use the last consistent reading to calibrate the meter. If the readings are
not consistent, avoid using an aberrant reading to calibrate the meter.
18. Calibrate the meter daily.
19. Calibrate the meter with a standard that is closest to the expected range of the sample
being tested. For example, if the sample is expected to be less than 1.0 NTU, calibrate
with a 1.0 NTU standard and a blank (0 NTU standard). If the sample is expected to be
around 2 NTU also calibrate with the 1.0 NTU standard but if the sample is expected
to be around 8 NTU calibrate with a 10 NTU standard. If the sample is expected to
be over 30 – 40 NTU it is recommended that the meter be calibrated with a 100 NTU
standard.
20. To maintain a consistent lamp temperature, do not turn the meter on and off when
analyzing samples.
TROUBLESHOOTING GUIDE
„ TROUBLESHOOTING
PROBLEM
"Blank?"
Flashing
"Low Battery"
"Shut Down Low Batt"
Shut Down
"Over range"
"Error1"
Unusually large negative
or positive readings when
performing calibration
Trouble connecting to
Bluetooth device
Trouble connecting to
computer by USB
Results not printing
„ STRAY LIGHT
The accuracy of readings on the 2020t/i BLE should not be affected by stray light. Make sure
REASON
Sample is reading lower than the
blank.
Low battery. Readings are reliable.
Battery voltage is very low. Readings
are not reliable.
Battery is too low to operate the
unit.
Sample is outside of acceptable
range.
High readings with 90° and 180°
detectors.
Incorrect standards used to
calibrate meter.
Bluetooth not enabled
Too many Bluetooth devices near
the meter
Broken connection
Printer not on
The meter will only print to the BLE
Mobile Printer (Code 5-0067) .
The Bluetooth Pairing option is not
set correctly.
44
SOLUTION
With samples of very low
concentration reblank or record
as zero. On samples of higher
concentration reblank and read
again.
Charge battery or use USB wall/
computer charger.
Charge battery or use USB wall/
computer charger.
Charge battery or use USB wall/
computer charger.
Dilute sample and test again.
Dilute sample by at least 50%
and retest.
Use fresh 0.0 standard in clean
tube. Recalibrate meter.
Enable Bluetooth
Have only one Bluetooth device
near the meter
Press and hold power button for
1 second
Turn printer on
Connect to the BLE Mobile
Printer (Code 5-0067).
See Setup Bluetooth Printing.
®