Hach BioTector B7000 User Manual page 129

Relay 17, 18 and 19 together with the Auxiliary Relays (if fitted) may be programmed to any one of the following options:
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STREAM
STM ALARM
MANUAL
FAULT
WARNING
FAULT OR WARN
NOTE
STOP
MAINT SIGNAL
CAL SIGNAL
CAL
ALARM
SYNC
MAN MODE TRIG
4-20mA CHNG
4-20mA CHNG 1-6
4-20mA READ
SAMPLER FILL
SAMPLER EMPTY
SAMPLE STATUS
SAMPLE FAULT 1
Relay not programmed.
Output set for stream valves 1-6.
Stream alarm relay 1-6.
Output set for Manual Valves 1-6.
(Normally energized output) set to operate on fault condition.
(Normally energized output) set to operate on warning condition.
(Normally energized output) set to operate on fault or warning conditions.
(Normally energized output) activated when a notification is logged in the fault archive.
Output set to operate when the BioTector is stopped condition. Note that remote stand-
by is not considered as a stop condition.
Output when MAINTENANCE SWITCH (input 22 by default) is activated.
Output set to operate on Zero/Span Check and Zero/Span Calibration reactions.
Calibration Valve used during calibration reactions.
Alarm relay, activated upon programmed alarm conditions.
Synchronization relay, use to synchronize the system with external control units.
Indicates that manual reactions are activated and going to be executed regardless of
the activation is carried out manually on the keyboard or remotely from Input 7 by
default.
4-20mA output change flag relay, which is always activated for a period of 10s, when a
new result causes update of any of the 4-20mA output channels.
4-20mA output change flag relay, which is always activated for a period of 10s, when a
new result causes update of a given 4-20mA output channel for a specific stream.
This signal is used to indicate valid/stable values on 4-20mA output channels in 4-
20mA Stream & Full Multiplex operation modes.
Fill signal, sent to the sampler, which remains on from start of sampler fill time to the
completion of the sample injection.
Empty signal, sent to the sampler, which is a pulse of 5 seconds duration and is
triggered after the Sample Pump reverse operation is complete.
Digital output activated (energized) when BioTector Sample Sensor detects no sample
or when the sample quality is less than the default 75% threshold value (i.e. when
there is significant quantity of air bubbles in the stream/manual grab sample lines).
Output when the external SAMPLE FAULT 1 input signal is activated.
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