Features:
a. Complete Integrated Corrosion and Deposit Monitoring System
b. Corrosion Rate and Pitting Tendency Of Heated Surface
c. Corrosion Measurements Of two Alloys
d. Integral Data Logging Of All Parameters
e. Field Proven Technologies
Rohrback Cosasco Systems and Bridger Scientific have collaborated
to produce the new Rohrback Cosasco Systems CorrDATSTM integrated corrosion and deposit monitoring system. The main
parameters required for control of a water treatment program have
been combined into this integrated data logging system which may be
interrogated with a local portable or desktop PC, or remotely via
modem over a telephone line.
In the actual field environment of water treatment, it is necessary
to maintain the proper balance between low pH (more acidic) which
increases corrosion, and high pH (more alkaline) which increases
scaling tendency. Consequently, to achieve this balance, the
operator must control pH, conductivity, corrosion, scaling and
deposition. The CorrDATSTM unit was developed to specifically blend comprehensive,
sophisticated yet field-proven technologies into an economical
package.
The heat exchanger flow tube of the system is matched to the alloy
of the plant heat exchanger to be monitored in the field. The flow
through the tube is programmed and controlled to represent the most
critical plant condition, usually the lowest flow velocity. The
heated surfaces are programmed and controlled to represent the most
critical heat transfer conditions, normally the highest heat flux,
and connected to the highest water temperature from the plant heat
exchanger outlet. This sets up the system for scale and deposit
monitoring.
In many systems, the heat exchanger tubing is a copper-based alloy
and the rest of the system is carbon steel. Separate elements of
the corrosion inhibition must be simultaneously regulated to
prevent corrosion of both of these alloys. In addition, the
corrosion rate on the heated exchanger tube material can change
with temperature. The Corr DATSTM system is unique because.
1.It provides CORRATERmeasurements from electrodes which are made
from the same material as the heat exchanger, and;
2.The electrodes are under the same heat flux conditions as the
deposit monitoring section of the system.
The new 9030-Plus corrosion monitoring electronics are used in the
CorrDATSTM system, for increased flexibility (see bulletin #303 for more details). The 9030-Plus unit monitors multiple
parameters, including corrosion rate and pitting tendency from two
CORRATER probes.
In the data logging version of the unit, any four of the measured
parameters from the 9030-Plus unit are data logged, with p to 124
records, at 0.05 to 99 hour intervals. Software is included with
the system for uploading of the accumulated data. Data files are in
ASC][ format, (*.prn files) for importing into standard spreadsheet
programs. Alternately, an analog unit is available with 11 outputs
and 2 inputs.
Specifications:
1. Maximum Heat Flux: 50,000 Btu/hr.ft2
2. Maximum Fluid Temp: +1800 Deg F
3. Flow Velocity Range: 1-10 ft/sec
4. Tube Size: 7/8'' dia.
5. Tube Alloy: Any Commercially available
6. Enclosures: Plastic sealed enclosures
Stainless steel/Aluminum heat exchanger case
7. Corrosion Rate: 0-1000mpy
8. Imbalance (Pitting Index): 0-1000 pitting units
9. Operating Range: Conductivity (umhos/cm) divided by corrosion
rate (mpy)>4
10. AquaCorrTM Data Logged Parameters Max 4
11. 9030-Plus Inputs: 2 Channel Corrosion Rate 2 Channel Imbalance
2 Channel Temperature
