Calibration And Verification - Novasina LabMaster-aw neo Operating Instructions Manual

6. Calibration and Verification

Contamination by volatiles and ageing of the sensor element can influence the
accuracy of the measurement sensor. Due to that reason, it is necessary to verify
the instrument from time to time. If verification fails, a two or more point calib-
ration has to be performed.
Note: Within scope of supply, there are various salt standard with RFID chip
which allows a flawless identification of used standard by the LabMaster-aw neo.
Please use Novasina standards only to perform verification or calibration. Stan-
dards or own prepared liquids without RFID chip cannot be used for automatic
verification and calibration.
Calibration needs less time if you start with salt standard values bottom-up, i.e.
start with the lowest and end with highest value.
Important!
• If a chemical protection filter is mounted in front of the sensor, remove it
as it just elongates the procedure. The mechanical protection filter which is
installed by default must not be removed.
• Make sure the chamber is absolutely dry. If small water droplets are present,
it might lead to wrong verification/calibration results.
• A calibration at 1.0000aw (SAL-T 100) mainly causes such small droplets of
water, so please calibrate this point as the very last one in the row. Once
finished, left the measurement chamber open for a while until small droplets
have disappeared.
• Verification or calibration must be performed at a target sample tempera-
ture in the range between 15°C (59°F) to 30°C (86°F). If the temperature is
not within this range, the following error message is displayed:
• If the temperature of the measurement chamber is outside of stored data
range for each salt standard, the following error message is displayed. A
calibration is thereby not possible:
• If surface temperature differs more than +/-4°C of the programmed target
sample temperature, time for calibration is much longer than normal. It is
indicated by a pop-up message as below. To avoid it, please store the stan-
dards at more or less the same temperature as target sample temperature
www.novasina.ch
20