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– 27 –
Symbols lit besides
the numbers
Key
Description
All the symbols are
lit for a few seconds
after switching on.
lx/fcd
°C/°F
RCD
Key for switching the instrument on
and off. The instrument switches off
automatically about 8 minutes after
this key has been pressed, as it has
a built-in switch-off device. If any
key other than the ON/OFF key is
pressed, the instrument switches
off 8 minutes after the last key was
pressed.
For measuring ILLUMINANCE;
when this key is pressed the rea-
ding may be in the photometric unit
lux or foot candle if a photometric
probe is fitted in the instrument.
If a temperature probe of the TP870
series is fitted in the instrument, this
indicates the temperature measu-
red by the probe. The key may be
pressed alternately to give a rea-
ding in °C or °F.
When the key is pressed it erases
from the memory and resets the
maximum, minimum and integrated
Q energy values, then resets the
count of the time elapsed.
When the key is pressed the instru-
ment stores and updates the maxi-
mum, minimum and integrated Q
energy values for the time elapsed,
recorded by the measurement pro-
be fitted. The battery symbol fla-