Merlin HM9 Manuel D'utilisation page 77

Operation
The temperature of the specimen should have
approximately the same temperature as the
wood moisture meter.
Temperature differences greater than 5 °C can
influence the measuring result negatively. Al-
low the device to adapt to the environment for
a few minutes.
If the temperature of the measuring device or
the wood is outside of the permissible range,
a temperature warning is shown on the dis-
play.
(a)
A blinking "T" (a) indicates that the permissi-
ble temperature range has been undercut or
exceeded.
76
Wood moisture meter