7 VERIFICATION AND CALIBRATION AquaLab TDL
15. To discard the calibration changes and exit without saving,
press the X button and the system will return a calibration
canceled message.
16. Measure a 0.76 a
w
verification standard again in normal sam-
pling mode. It should read the proper value (within ±0.005 a
w
)
at a given temperature (see Appendix B of a second verification
standard (0.25 or 0.50 a
w
) according to the verification proce-
dure described above. If both verification readings are within
±0.005 a
w
then the instrument is ready to begin testing.
17. If you have trouble reading the water activity of standards at
temperatures other than 25
◦
C after performing a multi-point
calibration, contact METER by email at
support.food@metergroup.com or by phone at 509-332-5601 for
further instructions. If you purchased your METER instru-
ment from one of our international distributors, please contact
them for local service and support.
How to Restore Factory Defaults
To restore original calibration settings, do the following:
1. Toggle to the Configuration tab by pressing the Document icon
button. Select Calibration and press the Enter button.
44
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