Dynalab SMP40 - Manual (Page 33)

10.2 Maintenance Settings
In the Settings and Calibration menu screen touch the Change maintenance settings section of the
screen. The Maintenance screen allows the user to upgrade the version of software on the instrument
and to recalibrate the touch screen.
1 To upgrade the instruments software, firstly
download the new software version onto a
USB flash drive. Insert the USB flash drive into
one of the SMP40’s USB ports and touch the
“Press to upgrade” button. The new software
version will be automatically installed onto
the instrument.
Do not switch off the device or attempt to
remove the USB flash drive during this
process.
2 To recalibrate the touch screen touch the
“Press to enter screen calibration” button and
follow the on-screen instructions.
10.3 Instrument Calibration
To ensure that the instrument is operating correctly, periodic checks on the accuracy of the instruments
temperature readings are commonly performed. If the accuracy of the instrument is found to deviate
from the specification or if it is a requirement of your local quality policy, the following procedure can
be used to recalibrate the displayed temperature on the instrument.
It is recommended that the recalibration procedure is performed using suitable certified reference
materials (CRM’s), as this will ensure the highest levels of confidence is maintained in the results
generated with the instrument. The World Health Organisation (WHO) gives a list of suitable CRM’s
which includes the following materials:
Material Nominal Melting Point
Azobenzene 69 °C
Vanillin 83 °C
Benzil 96 °C
Acetanilide 116 °C
Phenacetin 136 °C
Benzanilide 165 °C
Sulfanilamide 166 °C
Sulfapyridine 193 °C
Dicyanodiamide 210 °C
Saccharin 229 °C
Caffeine 237 °C
Phenolphthalein 263 °C
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