Specifications

HE
73
1
2
3
AK
STAND-BY
EX-STBY: External Stand-by input
(for external switch-off)
Possible parameters:
INACTIV - standby input is ignored
ACTIV - standby input is active
Activate the standby input:
1. Under menu item > EXT-STBY <, set the parameter to >ACTIV<.
2. Connect an external contact ‚AK‘ (e.g. for switch-off) or an alarm
contact of the superordinated system.
In case the connection between Pin 2 and Pin 3 is interrupted by opening
the contact ‚AK‘, a complete shutdown of the circulating pump and heater
is effected, and the unit enters the condition „E OFF“.
If the contact is reclosed, the instrument returns to the standby state and
„E OFF“ is displayed. Press
to start.
AK
1
2
3
STAND-BY
 Additional tips for using the STANDBY input:
The standby function can be used in conjunction with the AUTOSTART
feature
1. If the Autostart function is NOT turned ON, the standby input is used
as described above.
2. If the Autostart function is enabled, the instrument will revert back to
the original method of entering the setpoint (i.e. keypad, RS232,
Analog input, etc.).
Entering the setpoint with the keypad.
e.g.
As described above, a bipolar shutdown is accompanied by
displaying the „E OFF“ state. The circulator starts again when the
contact is reclosed. The temperature of the bath fluid changed during
the „E OFF“ state.
Entering the setpoint with the programmer.
The display E OFF appears. The setpoint value and the time are both
held at the current value. The temperature of the bath fluid will be held
constant at this temperature. The programmer continues once the
contact is reclosed.
Notice: This is not an actual shutoff feature.