Relay Program - Hach BioTector B7000 User Manual

Relay Program

COMMON FAULT
ALARM N/D
CO2 ALARM
STM ALARM 1
STM ALARM 1
STM ALARM 2
STM ALARM 2
................................................................................................
STM ALARM 6
STM ALARM 6
N/E STOP/FAULT
350.0mgC/l
0.0ppm
TOC STREAM 1
N/D 350.0mgC/l
TN STREAM 2
N/D 150.0mgN/l
N/A
N/A
 In COMMON FAULT N/E STOP/FAULT setting, N/E (Normally
Energized by default) defines the idle state of the relay.
STOP/FAULT by default is the activation condition which means
that the Fault Relay activates when BioTector is stopped or
when there is a fault or a warning condition.
 If the COMMON FAULT is programmed as FAULT ONLY, the
Fault Relay activates on a fault or a warning event only. In other
words, when BioTector is stopped, the fault relay does not
activate.
 Depending on the COMMON FAULT setting, the Fault Relay is
restored to its default condition when all faults and warnings are
acknowledged in the Fault Archive menu and when BioTector
starts running again.
 If ALARM is not programmed in Output Devices menu, this
option will not be available in this menu.
 In ALARM N/D 250mgC/l setting, N/D (Normally De-energized
by default) defines the idle state of the relay. The concentration
level determines the alarm condition where the Alarm Relay is
set or reset at the end of each reaction once the calibrated result
is known.
 Note that in TIC & TOC, TC - TIC and VOC analysis types,
alarm relays are controlled by the TOC result of the last
completed reaction. In TC analysis type, alarm relays are
controlled by the TC result.
 If ALARM is not programmed in Output Devices menu, this
option will not be available in this menu.
 CO2 ALARM is a predictor function of a possible high TOC
(COD and/or BOD if programmed) level. By default, this function
is disabled by 0.0ppm setting. If programmed, it provides an
earlier warning of an unusually high TOC result from the rising
slope of the CO peak generated during the reaction.
2
 If programmed, the alarm level (ppm CO
selected carefully considering the temperature effect which could
be significant on the CO
needs to be given for the settings which will create an actual
early warning for an unusually high reading. At the end of the
reaction, the Alarm Relay status is maintained or reset
depending on the real TOC (COD and/or BOD) reading. In
addition, this function is only suitable for multi-stream systems
operating on fixed ranges, or systems operating on a single
range. The use of this function is not recommended for systems
which uses automatic range change.
 Note that in TIC & TOC and VOC analysis types, the CO
used for the CO2 ALARM is the TOC CO
TIC analysis type, the CO
 If STREAM ALARM is not programmed in Output Devices menu,
this option will not be available in this menu.
 Unlike ALARM, which operates on the last reaction result from
any stream valve, STREAM ALARM operates on a specific
stream and reaction result type. In "STM ALARM 1 TOC
STREAM 1" setting, TOC is the desired reaction result which
can also be programmed as TIC, TC, VOC, COD, BOD or TN.
STREAM 1 is the selected stream.
 In STM ALARM 1 N/D 350.0mgC/l setting, N/D (Normally De-
energized by default) defines the idle state of the relay and
350mgC/l defines the desired alarm activation level.
peak) need to be
2
peaks. In other words, enough margins
2
peak. In TC and TC –
2
peak used is the TC CO
2 2
peak
2
peak.
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