SSi's Model 9120 Redundant Probe System -
Color (RPS-C)
Features
include: |
 |
- Data logging using
operator interface memory card
- Operator interface trend
line display
- Indication showing which
probe is being used for the % C calculation
- Allows customer
selection of probe "A" or "B", or automatic selection
The two (2) SSi Gold
Probes shown in the picture (below) MUST BE ordered
separately. |
RPS - C with Dual Reference - Purge Air
System
Model 4500 | P/N 13493 |
SSi's
Model 9120 Redundant Probe System (RPS)
includes: |
- The Model 9120
- A 24 VDC power
supply
- Two - 24 VDC relays are
mounted and wired on a piece of DIN rail for easy mounting by the
customer
- The 2-line operator
interface
- The cable connecting the
operator interface to the Model 9120-RPS
The two (2) SSi Gold
Probes shown in the picture MUST BE ordered
separately |
Function:
The Model
9120-RPS reads the signal from two oxygen probes located in the same
furnace automatically switching the output from the Model 9120 RPS
to the probe with the highest millivolt output. It sends that
probe's output to the existing carbon controller to control the
enriching gas being added to the furnace.
The probe millivolt
"deviation band" and the "alarm delay" time is set using the
operator interface. When connected per the electrical drawing, the
Model 9120-RPS selects the probe with the highest millivolt output
and sends that signal to the controller. As time passes and the
other probes millivolt output becomes greater (dependent on the
deviation band), the Model 9110 RPS will switch the output from one
probe to the other and send the "new" higher millivolt signal to the
carbon controller.
The " asterisks (*) " on the operator
interface display indicates which probe's millivolts is being used
by the furnace atmosphere controller. When the Model 9120-RPS
switches the output from one probe to the other it indicates a
"deviation band" alarm condition, flashing an "A" on the operator
interface. The "A" continues to flash until the probe's output is
back within the "deviation band".
The operator can manually
select the probe that he wishes to be used in the carbon
calculation. If this feature is used the 9120 RPS will use the
operator selected probe, and NOT switch from one probe to the other
automatically. |
