Water testing method and apparatus

摘要

An automated water testing apparatus and to a method of using the apparatus to test the amounts of dissolved salts and other solids in a water sample, where the apparatus includes a specially constructed sample bottle which preferably has a flexible wall and is fitted with a filter cap having a mesh top wall through which sample water can be poured to remove suspended matter, several beakers, a desiccator enclosure, a computer containing a database and an inventive computer program for executing method steps, and several devices in communication with and controlled by the computer and the program for executing the method, these devices preferably including a conductivity meter having a meter electrode, a robotic arm having a gripper, an analytical scale, a top loader balance scale and an oven.

主权项

1. A method of testing water to determine concentrations of dissolved solids, comprising the steps of:
providing a testing apparatus comprising a sample bottle fitted with a removable cap and having a filter comprising a filter mesh, a plurality of testing vessels, a desiccator enclosure, a computer containing a database and a water testing computer program in operational communication the database, a computer operated robotic arm having a gripper in communication with the computer, a computer operated conductivity meter having a meter electrode and in communication with the computer, a computer operated scale for recording and storing weights in the computer database, and a computer operated oven in communication with the computer; one of a person or the computer operated robotic arm delivering a first water sample into the sample bottle and securing the removable cap onto the sample bottle; the robotic arm grasping the meter electrode and inserting the electrode into the water sample; the conductivity meter relaying sample water conductivity data to the database; the robotic arm sequentially placing the at least one of the testing vessels into the oven; the computer signaling the oven to heat to a first temperature for a first length of time to thereby evaporate any moisture on or within the testing vessels; the robotic arm removing the testing vessels from the oven; the robotic arm placing the testing vessels sequentially into the desiccator enclosure; the robotic arm placing the testing vessels one at a time onto the analytical scale to transmit to the database and record the tare weight; the robotic arm placing each tared testing vessel on the scale one at a time; the robotic arm lifting the sample bottle and moving the sample bottle toward a first one of the testing vessels on the scale; the robotic arm moving the sample bottle to mix the water sample; inverting the sample bottle over the first one of the testing vessels; the robotic arm gripper then proportionately squeezing the sample bottle while the computer monitors the weight of the testing vessel and sample water as the sample water enters the first testing vessel; the gripper discontinuing the sample bottle squeezing once a desired volume of sample water is reached in the first testing vessel; the computer operating the robotic arm to sequentially repeat these testing vessel filling steps to fill a plurality of additional testing vessels; the computer operating the robotic arm to grip, lift and place the testing vessels into the oven; the computer operating the oven to increase its internal temperature to a second temperature to evaporate the water from the testing vessels, leaving residue in the testing vessels; heating the testing vessels and the residue within the testing vessels to the second temperature and permitting the testing vessels to remain heated at the second temperature until all of the water in the testing vessel is evaporated; the robotic arm removing the testing vessels from the oven; and placing the testing vessels into the desiccator enclosure to cool to a temperature of the balance; the robotic arm placing the testing vessels one at a time onto the scale; the scale transmitting the weights of each successive testing vessel and its corresponding contained residue to the database; the computer calculating the net weight of the residue in each testing vessel by subtracting the tare weight of the corresponding testing vessel; the computer calculating the quantity of total dissolved solids from the net weight and volume for each testing vessel; the computer repeating the weighings of each testing vessel to obtain constant weights according to stored criteria for each testing vessel; and, once the constant weight criteria is met for each testing vessel, the computer using the most recent weight to calculate the final total dissolved solids and storing and recording the final total dissolved solids for each testing vessel in the database.