15
WIKA operating instructions, model CTD4000
14366831.01 05/2020 EN/DE
EN
6. Commissioning, operation
The LED isn't lit =
LED OFF
with switch open
1. With the
[F]
button, select the function
run
.
2. With the
[▲]
or
[▼]
button, set to
ON
.
When the LED in this function flashes, this indicates that the
process is active.
■
The thermostat’s release values are recorded in the
parameters
SOn
and
SOFF
.
■
Temperature runs between T
max
and T
min
until the
function is switched off. The
SOn
and
SOFF
values are
continuously updated during each run.
■
By entering
run
OFF
, the switch test is ended.
6.9 Cooling down the metal block
WARNING!
Risk of burns!
High temperatures at the metal block or at the
temperature probe can lead to acute burns.
▶
Before transporting or touching the metal
block and/or calibration instruments, make
sure that they have cooled down sufficiently.
▶
In order that the calibration instruments can
be brought quickly from a higher to a lower
temperature, set the set temperature to a
lower temperature (e.g. room temperature).
▶
In order to cool down the metal block, set the
set temperature to a low temperature, e.g.
room temperature.
1. With the
[▲]
or
[▼]
button, enter the room temperature.
2. Confirm the entry with the
[E]
button.
The installed fan gently and automatically switches to a
higher speed thus providing more cooling air.
After switching off or removing the mains
connection, no cooling air will be provided by
the built-in ventilator. If the voltage supply is
interrupted during the cooling process, sufficient
thermal decoupling is still guaranteed between
the metal block and the case.
