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Instruction Manual
IM-106-340, Rev. 4.0
May 2006
3-3
Oxymitter 4000
SW2 Setting
The factory sets this switch as follows:
1. Position 1 is HART/LOCAL. This switch setting controls the configura-
tion of the Oxymitter 4000. The defaults cannot be changed via
HART/AMS unless the switch is in the HART position. Placing SW2,
position 1 in the LOCAL position forces the O
2
range to the setting of
position 2. The position 1 switch must be placed in the LOCAL position
or changes in SW2, position 2 will have no effect.
2. Position 2 determines the O
2
range. This can be set to either 0 to 10%
O
2
or 0 to 25% O
2
. The factory setting is 0 to 10% O
2
. If necessary, the
O
2
range can be configured from 0 to 40% O
2
. To select values within
this range, set SW2, position 1 to HART and then enter the range via
HART/AMS. Do not change SW2, position 1 to LOCAL unless you want
to operate in the range specified by SW2, position 2.
3. Position 3 determines the output at startup or at an alarm. The settings
are 3.5 mA or 21.6 mA. The factory setting is 3.5 mA. At startup, the
current at the analog output is 3.5 mA or 21.6 mA.
4. Position 4 can be used to set the heater for 115 or 220 VAC operation.
This switch is functional only when the software is set for manual
voltage selection (Auto Tune = No). Otherwise, the internal electronics
auto detect the input line voltage and sets the heater voltage
accordingly (Auto Tune = Yes).
Typically, the probe's sensing cell, in direct contact with the process gases, is heated to
approximately 1357°F (736°C). The external temperature of the probe body may exceed
842°F (450°C). If operating conditions also contain high oxygen levels and combustible
gases, the Oxymitter 4000 may self-ignite.