1. SCALE EQUIPMENT a. Scales shall be CHLOR-SCALE Model DR40 or equivalent. 2. DIGITAL DISPLAY EQUIPMENT a. Chlorine Digital display equipment must be WAZARD 4000 digital display Model 4000-4, as manufactured by FORCE FLOW, or equivalent. b. Sulfur Dioxide Digital display equipment must be WAZARD 4000 digital display Model 4000-2, as manufactured by FORCE FLOW, or equivalent. 3. SCALE PLATFORM a. A quantity of four (4) chlorine scales and two (2) sulfur dioxide scales shall be provided and shall be of the digital redout/electronic load cell type. A total of six (6) scales shall be provided. b. Scale frame shall have a 2-part epoxy powder coated finish and be sized to accept one (1) 3,600 lb. chlorine or sulfur dioxide container. c. The frame shall have four (4) heavy duty, zinc-plated, steel trunnion rollers with bronzebushed bearings installed to allow for easy container rotation. i. UHMW polyethylene or other non-metallic rollers or wheels shall not be acceptable. d. Scale shall be of such a size that it is within the dimensions of the tank it supports. e. Scale shall be of the single load cell design. f. Weight shall be transferred via lever to a single load cell of the shear beam strain gauge type. g. Flexible cable shall connect load cell to indicator to allow easy remote installation of the readout. i. Cable length shall be 20 feet in length. 4. INSTRUMENT ENCLOSURE, OUTPUTS, AND ALARMS a. Indicator shall have four (4) channels to allow individual monitoring of up to four scales. b. Indicator shall carry CE marking if manufactured in a European country, and shall be housed in a NEMA 4X, UL approved enclosure. c. Indicator shall have a 20-key digital keypad & ability to display the data from two (2) scales simultaneously on a backlit, alphanumeric display. d. If more than two scales are being monitored, display shall automatically scan all scales in the system. e. Indicator shall have adjustable 4-20 mA signals that output net weight for each scale. f. Indicator shall display an alarm in any of the following conditions: i. Low level ii. Low feed rate iii. High feed rate iv. Maximum daily use v. Minimum daily use vi. Supply exhausted vii. Load cell failure g. An alarm log shall store the most recent ten (10) alarm conditions with tame and date of occurrence.
