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 Error 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. |
