4
AC line:
phase
to terminal (P).
neutral
to terminal (N).
earth
to earthing terminal.
Since the instrument is directly wired to the AC power line, an external
mains switch should be provided when recommended by the local
legislation. If a mains failure has occurred, it will always automatically
proceed with the process control when the AC power comes back on.
SET-UP
Procedure to pre-set the different channels and their possibilities
according your applications.
Channels
1.
Press
SET
.
2.
Press
¿
or
À
until the display shows [SEt CHAn] and press
CAL
to
continue or
SET
to cancel.
3.
The display shows [CH1=EC], [CH1=°C], or [CH1=OFF]. Select the
desired mode for channel-1 with
¿
or
À
and press
CAL
to continue
or
SET
to cancel.
4.
The display shows [CH2=EC], [CH2=°C], or [CH2=OFF]. Select the
desired mode for channel-2 with
¿
or
À
and press
CAL
to continue
or
SET
to cancel.
5.
This step is
skipped
unless channel-1 has been programmed for pH.
The display shows [tc1=°C1] or [tc1=°C2]. Select the desired
temperature compensation input for channel-1 with
¿
or
À
and press
CAL
to continue or
SET
to cancel.
6.
This step is
skipped
unless channel-2 has been programmed for pH.
The display shows [tc2=°C1] or [tc2=°C2]. Select the desired
temperature compensation input for channel-2 with
¿
or
À
and press
CAL
to continue or
SET
to cancel.
7.
This step is
skipped
unless channel-1 and channel-2 have been
programmed for the same mode. The display shows [CH.ind.],
[CH.diF.], [CH.And], or [CH.or]. Select the desired mode with
¿
or
À
and press
CAL
to continue or
SET
to cancel. Mode [CH.ind.] means
that both channels operate independently. Mode [CH.diF.] means that
the relays are only activated when a pre-set difference between both
channels is exceeded. Mode [CH.And.] means that both channels
must exceed a pre-set level before the relays are activated. Mode
[CH.or] means that the relays are activated when one of both
channels exceeds a pre-set level.
[CH1=EC]
: Conductivity-measurement
[CH1=°C]
: Temperature measurement
[CH1=OFF]
: Channel switched off
Relays:
There are three relays (REL1) through (REL3) with voltage-free contacts,
which may be programmed to be activated by the high/low levels or a pre-
set alarm. The ratings of the connected load should lie between 100...250
V~, maximum 0.5 A.
