Refco REFSCALE-S Manual De Instrucciones página 6

If the electronic charging scale falls, it must be
calibrated.
Intended Use
The electronic charging scale has been developed for measuring
weights in mobile and stationary refrigeration systems. Only trained
refrigeration technicians are permitted to use this REFCO product.
Observe the operating conditions from the specifications (data
sheet).
The weight measurement should only begin when a stable
condition is fulfilled, or the symbol "Stable Measured Value" is
displayed (see Chapter 8.0). To achieve the most accurate
measurement result possible, the weight must be placed in the
middle.
Humidity can cause surface changes to the aluminium housing,
which is harmless. To prevent this, the device must be dried when
damp.
The scale must not be exposed to the sun for long periods of time,
as this can cause damage and discoloration to the plastic housing,
the rubber mat or the display.
Instruction Manual 5