Metrohm 732 IC Detector - Manual (Page 113)

4 Operation
732 IC Detector / 733 IC Separation Center
106
4.6.4 <ZERO OFF> key
ZERO OFF
4
The <ZERO OFF> key is used to switch off the auto-zero function. The
auto-zero function can be triggered using the <ZERO OFF> key in the
standby mode or when a program is running, but not in the edit mode.
When the green LED 66 in the <ZERO> key goes out, this shows that
the electronic background compensation is no longer active.
4.6.5 <MARK> key
MARK
0
The <MARK> key is used to trigger a marking signal. In addition to the
measuring signal, a signal of ca. 10% of the full-scale range is output-
ted briefly at the analog output. This allows, e.g. the start of a chroma-
togram to be marked during recording on a recorder.
Marking can be triggered with the <MARK> key in the standby mode
or when a program is running, but not in the edit mode.
4.6.6 <PUMP R/S> key
PUMP R/S
8
The <PUMP R/S key is used for on/off switching of the pump drive of
the 709 IC Pump. A requirement for this is that the 709 IC Pump is
connected to the 732 IC Detector and the remote control is switched on
at the pump with the <EXT.> key (see section 2.6.1).
With the <PUMP R/S> key the pump drive of the 709 IC Pump can be
switched on or off in the standby mode or when a program is running,
but not in the edit mode. When the pump drive is switched on, the red
LED above the <R/S> key on the pump lights up.
The settings of the pump parameters on the 732 IC Detector 732 are
described under the <CONFIG> key in section 4.4.2, the pump status
messages in the standby mode in section 4.3.2.