IB-106-340
2-10
Table 5-1. The assignment of alarms which
can actuate this contact can be modified to
one of seven additional groupings listed in
Table 3-1.
The logic contact is self-powered, +5 VDC,
340 ohm series resistance. An interposing
relay will be required if this contact is to be
utilized to annunciate a higher voltage
device, such as a light or horn, and may also
be required for certain DCS input cards. A
Potter & Brumfield R10S-E1Y1-J1.0K
3.2 mA DC or an equal interposing relay
will be mounted where the contact wires
terminate in the control/relay room.
d.
Install terminal block cover (27, Figure 6-1) and
secure with cover lock (34), gasket (33), and
screw (32).
2-3.
ELECTRICAL INSTALLATION (FOR OXY-
MITTER 4000 WITH SPS 4000). All wiring must
conform to local and national codes.
Disconnect and lock out power before
connecting the unit to the power supply.
Install all protective equipment covers
and safety ground leads after installation.
Failure to install covers and ground leads
could result in serious injury or death.
To meet the Safety Requirements of IEC
1010 (EC requirement), and ensure safe
operation of this equipment, connection
to the main electrical power supply must
be made through a circuit breaker (min
10 A) which will disconnect all current-
carrying conductors during a fault situa-
tion. This circuit breaker should also
include a mechanically operated isolating
switch. If not, then another external
means of disconnecting the supply from
the equipment should be located close by.
Circuit breakers or switches must comply
with a recognized standard such as IEC
947.
Autocalibration systems will inject gases into the
probe and make electronic adjustments with no
operator attention required. The SPS 4000 provides
solenoid valves and circuitry for calibrating a single
Oxymitter 4000 unit.
The SPS 4000 autocalibration system utilizes the
Oxymitter 4000’s bidirectional logic contact as a
“handshake” signal. Therefore, this signal is not
available for alarming purposes.
The following contacts are provided through the
autocalibration system:
a.
One contact closure per probe from the control
room to the SPS 4000 for “calibration initiate”.
b.
One contact output per probe from the SPS 4000
to the control room for “in calibration” notifica-
tion.
c.
One contact per probe from the SPS 4000 to the
control room for “calibration failed” notification,
which includes output from pressure switch indi-
cating “cal gas bottles empty”.
NOTE
The 4-20 mA signal can be configured to re-
spond normally during any calibration, or
can be configured to hold the last O
2
value
upon the intitiation of calibration. Factory
default is for the 4-20 mA signal to operate
normally throughout calibration. Holding
the last O
2
value may be useful if several
probes are being averaged for the purpose
of automatic control. Unless several probes
are being averaged, always place any con-
trol loops using the O
2
signal into manual
prior to calibrating.
Electrically connect the probe as follows:
a.
Remove screws (26, Figure 6-11) securing
terminal cover (27). Remove the cover to expose
terminal strip (25).
b.
Connect Line Voltage. Route the line voltage
leads into the manifold through the 1/2 in. line
voltage conduit fitting (Figure 2-2) and out through
the bottom of the manifold. Connect the LINE IN
and NEUTRAL leads to terminals L and N, re-
spectively, as shown in Figure 2-10. Also, be sure
to connect the ground wire to the ground lug. The
unit automatically will configure itself for 90 to
250 VAC line voltage and 50/60 Hz. The power
supply requires no setup.
Содержание Oxymitter 4000
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