3
To take a measurement without having to look at the display while the reading is
taken (for example where the operators head may affect the reading) proceed as
follows:
1. Position the monitor where the reading is to be taken.
2. Push the appropriate button for 1-2 seconds and release.
3. Hold the monitor in position for at least 2 seconds.
4. Without operating any buttons by mistake move the monitor so the reading
can be noted before it turns itself off.
Firmware and Hardware
The unit firmware is the embedded computer program that controls the unit. The
firmware is updated periodically to add additional features and to correct any faults
that have become apparent. Any unit’s firmware is updated at the factory whenever it
is returned for calibration/repair.
The hardware is the physical unit itself including the electronic circuit inside. Units
manufactured after July 2015 have improved hardware (version 10) that allows faster
charging. Further updates in 2019/2020 (V12 & V13).
The firmware and hardware versions are displayed as “F.f : H.h” when the unit is
turned on or by pressing Set\About. F.f is the firmware version H.h is the hardware
version.
Underneath this line, if a humidity sensor is fitted, the sensor version is shown as RHx
where x is the RH sensor type. (Not all versions)
The hardware version is not displayed on units with firmware version less than 2.9
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