15
5.2.1.13 Restore Factory Cal Menu
5.3 System Start-up
Once the SSR-Ex is powered on, air has been purged, and all
configurations have been completed, it is ready for use.
5.3.1 Flush Water Sample Line
Before sampling any sample water, the water line from the source
water to the enclosure must be flushed to ensure that the sample line
has a representative sample and is not impacted by any debris or other
foulants. Flush the sample line by using the WATER PRIME feature
found under the SERVICE menu. When this feature is selected, the
connect- ed water sample line will automatically flush water to drain.
Reference section 4.2.1.1 main menu.
5.3.2 Prepare Reagents
Prepare and install the reagents according to the instructions provided
on the reagent bottles. In the SERVICE menu, select PRIME to prime
the reagents. You can access the bottom of the enclosure to service
these items, if needed.
5.3.3 Remote Start
Once the line is flushed and the reagents primed, initiate a cycle
remotely through RMT or MODBUS.
The SSR-Ex will only operate using a remote start signal.
5.4 Typical Cycle
During normal operation, the SSR-Ex will run through a timed cycle. A
simplified cycle will consist of the following sequences:
Flushing – sample flow Purging – PURGE valve opens
Zeroing – no flow with cuvette full
Adding Reagents – one pulse of the reagent pumps
Sample Reaction – reaction of reagents with oxidant sample Reading
resulting sample – no flow with cuvette full
Purging – PURGE valve opens to remove the reacted sample and water
The cycle above is simplified and does not describe all the actions
and testing that occurs. The CPU continuously diagnoses the entire
system for correct operation and sample water flow. If an error occurs,
a message is posted on the LCD screen and is indicated on a Modbus
address. Alarm contact closure can be user configured to provide an
alarm in the event of an error message.
5.5 Observe Operation
Observe the process in the optical assembly, you should see a vortex
of water form as the SSR-Ex flushes water through the cuvette, then
the unit will stop water flow and “zero” on the source water, flush again
and then actuate the reagent pumps and take
6.0 Maintenance
Under normal operating conditions, it is recommended that the
main enclosure door is closed. If the electrical or power devices in
the purged (upper) section of the enclosure needs to be accessed
for service, ensure all power has been removed from a safe location
before accessing the electrical or powered devices in the electrical
enclosure.
The SSR-Ex instrument is sectioned such that all the electrical or powered
devices are in the upper, purged section of the enclosure, while the lower
(wetted parts) section contains no power at all and can be operated and
maintained in a safe condition even with the main enclosure door open. In
the interest of safety, if the electrical or power devices in the purged (upper)
section of the enclosure needs to be accessed for service, ensure all power
has been removed from a safe location prior to accessing the electrical or
powered devices in the electrical enclosure. All components in the lower
(wetted parts) section of the enclosure can be accessed for service or routine
Figure 13 - Pressure regulator and T-strainer
6.1 Calibration
Calibration kit (Cat. No. 28144S) includes:
125 ml of zero solution (solution #1)
125 ml of calibration solution (solution #2) 1 each replacement cuvette
The SSR-Ex instrument was tested and calibrated prior to leaving the
factory. The instrument operates from a pre-determined calibration
curve for high accuracy of residual oxidant concentration. It is not
necessary to recalibrate to maintain stated accuracy specifications. If
re-calibration is required by a regulatory authority, calibration can easily
be accomplished in the field using the procedure below.
Step 1: Ensure the supply water is shut off. From the control buttons,
enter the calibration screen. Follow the on-screen instructions.
Step 2: Disconnect the black tubing from the pressure regulator to
the pump. Some water may drain from the regulator, this is
normal and it may be appropriate to use a container to catch
the small volume of water.
Step 3: Insert the black tube into solution #1. This is used to set a
zero reference. Follow the instructions on the display.
Step 4: When the SSR-Ex has completed the zero procedure you
will be instructed to move the tube to solution #2. Follow the
instructions on the display.
Step 5: The SSR-Ex will take a reading of the solution. If this reads
from 9-11 mg/l (PPM), the instrument is operating within
the stated specifications and no further action is required.
If the reading is outside of this range the SSR-Ex will allow
you to make an adjustment to bring it into range. Follow the
instructions displayed on the SSR-Ex.
Step 6: Restore the black tube to the pressure regulator and turn
the water supply back on. Check for leaks before closing the
enclosure door.
maintenance, while the SSR-Ex instrument is powered, air supplied, and
while the main enclosure door is open. Under normal operating conditions,
it is recommended that the main enclosure door is closed. In cases where
the SSR-Ex instrument is in an environment considered to be Zone 0 for a
period of time, power and air to the instrument must be removed.
General Condition Check - Once a month check the general condition
of the instrument in operation by opening the enclosure door and
visually inspecting the instruments wet chemistry section components to
confirm proper operation and to also check for any leaking components
or other concerns. The wet section components can be accessed for
maintenance, reagent replacement and visual inspection during voyages.
Specific condition of use: Parts of the enclosure are non-conducting
and exceed the maximum permissible resistance according to
the IEC 60079-0. Therefore, to avoid electrostatic charge build-
up, it must not be rubbed or cleaned with solvents or a dry cloth
when installed/used within a potentially explosive atmosphere.
