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The SRCM can take as input, the signal from two separate pressure transducers as well
as temperature, humidity, and user dened (ex. CO
2
) inputs for up to two rooms. These
are congured for either Primary Room or Secondary Room (an anteroom is an example
of a secondary room). When two transducers are used, the Home screen display of the
SRCM can toggle between each space to indicate the status of each room momentarily
cycling from one to the other. Alternatively, the display can be locked on either of the
two rooms.
*If Ch1 is selected for the Primary room, it will not be an available option for the Sec-
ondary room.
Use the radio button to select the setup parameters for either the Primary Room or Sec-
ondary Room.
It may be necessary to change settings to match the sensor being used. OnBoard is the
default, which uses the sensor manufactured on-board the unit. Alternatively, an exter-
nal sensor (also known as “external transducer” such as a Setra 264 or Setra 267) may
be used. If an external sensor is used, change this selection to ADC Ch1 (Analog Input
1) or ADC Ch-2 (Analog Input 2). The FS output and range of the external sensor will
need to be entered. If the OnBoard Sensor is selected, a box is shown displaying the
pressure range and engineering unit.
It may be necessary to change settings to match sensor being used, if there is one pres-
ent. There is no specic sensor listed at the default. An external sensor (Setra 264 or
Setra 267) may be used for the secondary room, or anteroom. If an external sensor is
used, change this selection to ADC Ch1 or ADC Ch2, which use Analog Input 1 or
Analog Input 2, respectively. The FS output and range of the external sensor will need
to be entered.
Setup Unit
Primary Room sensor:
• OnBoard Sensor
• External Ch1
Secondary Room sensor:
• External Ch1*
• External Ch2
Setup selection to
congure either
Primary or
Secondary Room
Primary room pressure signal
output (AO) scale and units:
• 4-20 mA
• 0-5 Vdc
• 0-10 Vdc
Room label of selected room,
either Primary or Secondary
depending on ROOM radio button
Full Scale (FS) range of transducer
selected, Primary or Secondary
Pressure units, either “ WC or Pa
Room - Primary or
Secondary
Primary Room
Sensor
Secondary Room
Sensor