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	682 Piston Meter - Operations & Storage  Return to TCS 682 FLOW RATE When installing a meter into a system, several factors must be considered. The flow rate of the system must be within the meter's capability. The 682 Meter can operate between 0.2 and 40 gallons per minute. The flow rate of the system is dependent upon the system's pump capabilities, and the plumbing configuration, and the product to be measured. OPERATING PRESSURE Similarly, the operating pressure of the system must be considered. The 682 Meter can operate at pressures up to 150 PSI. COMPATIBILITY Products with suspended solids in them will scratch the piston liners and tear the plunger cups. The liquid to be metered must also be compatible with the meter. The 682-15SP is for service in petroleum applications. The 682-15AF is for many industrial and agricultural products. The 682-15SS is for service on products which require 316 stainless steel for proper handling Note that the 682 Meter is not a water meter. Water has no lubricity and will drastically shorten the meter's service life. OPERATING TEMPERATURE The temperature range of the product to be metered must be within the meter's range. The SP meter can operate between -20°F and 200°F. The AF and SS meters can operate between -20°F and 400°F. (A heat extension is required for temperatures above 200°F). REGISTRATION The 682 Meter normally uses a Veeder Root 5-wheel resettable register in U.S. gallons. Liters, ounces, pounds or nearly any other unit of measure can be accommodated. STORAGE INSTRUCTIONS Short periods of non-use of the meter (a week or less) will present no problem, provided that the meter remains full of product. For long periods of non-use, such as winter storage, the following procedure is recommended. Before long term storage, a good practice is calibration of the meter to determine that it is functioning properly. To store the meter when it is left in line, flush the system with clean water until 40-50 gallons have gone through the meter. Pump a 50% anti-freeze / 50% water solution through the entire system (100% RV antifreeze may be used instead). With the pump running, shut off a valve downstream from the meter, making sure that anti-freeze solution is present at that point. Then close an upstream valve, such that the meter remains full of anti-freeze solution. Remove the register from the meter, and lubricate the drive coupling shaft. After lubricating it, replace the register onto the meter. When starting the system after a period of storage, rechecking the meter's calibration as detailed in the calibration guide is recommended.
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