Electro-Chemical Devices (ECD) SMS22 - Manual (Page 15)

2.3 PLUMBING
2.3.1 Sample Requirements
Minimum flow: 0.4 gal/hour, (1.5 L/hr)
Temperature: 32° to 122°F (0° to 50°C)
Sample Pressure: Drawn from atmospheric pressure
The Sample Conditioning Cell provides an atmospheric sample point that can adapt to changing sample
flows between 0.4 and 10 gal/hr (1.5 -37 L/hr).
2.3.2 Connecting the Inlet and Drain fittings
Sample Inlet:
The sample must be drawn from atmospheric pressure. The sample feed tube is 8 mm OD x 4.8 mm
bore (5/16” OD x 3/16” bore). The sample tube can be placed directly in an open reservoir of the sample
water or connected to the reservoir with a 3/16” barb fitting.
A Sample Conditioning Cell is available for pressurized samples. This Fast Flow Reservoir allows the
sample to fill a 200 ml sampling cell and overflow the balance of the feed to an atmospheric drain. The
input to the sample cell is a ¼” barb fitting is supplied for sample
connection but a compression style tube fitting can also be used (not
supplied). The sampling port is a stainless steel tube that
accommodates the sample feed tubing to the analyzer. The overflow
drains through the 12 mm overflow tubing exiting the bottom of the
Sample Conditioning Cell. Attach a length of 12 mm soft tubing and
allow the overflow to drain to open atmosphere. Do not restrict the
drain line. The pressurized feed must have an adjustable shut off
valve. Adjust the feed so that the Sample Conditioning Cell fills and
starts overflowing in 2 minutes or less. Filling the cell in 2 minutes
provides the minimum sample flow (1.5 liters/hour), faster feed rates
simply overflow to the drain.
Sample Drain:
The neutralized sample and the water from the rinse cycles drain
from the measurement cell when the solenoid valve is actuated. The
drain line must drain to atmospheric pressure.
2.3.3 Connecting the Reagents
DANGER: Read any precautions and the (MSDS) datasheets, wear protective gloves,
clothes and glasses before handling chemical products.
Hazard of severe burns or injury due to handling of dangerous chemicals
Connect the tubing from the reagent pumps to the insertion tubes. Press the insertion tube from
Reagent Pump 1 through the grommet in the cap of the 16% KOH solution. Press the insertion tube from
Reagent Pump 2 through the grommet in the cap of the 7.5% HCl solution.
SMS-22 Page 6