(1) A recording thermometer device may not be installed on or attached to a farm tank. It may be suspended on metal brackets from the ceiling, firmly attached to the inside wall of the milk room, firmly attached to the wall on the passageway side of the milk house, or at any location acceptable to the Bureau of Dairy Service.

(2) The sensor bulb or device shall be so located as to record the temperature of the milk in the tank before the milk reaches 10 percent of the tank volume. Any capillary system containing any toxic gas or liquid shall not be used in a bare-bulb censoring device.

(1) The recorder chart, if circular, may make one revolution in 24 hours, 48 hours, or 72 hours, with the recommendation that the chart rotation time coincide with the maximum storage period of the milk in the farm tank. If a strip chart is used, it shall move not less than one inch an hour and may be continuous to a maximum of one calendar month.

(2) The recorder clock may be manually wound or electrically operated. The recorder pen must reflect the actual time.

(3) The circular recorder chart shall have a minimum diameter of 10 inches if the minimum temperature is recorded near the circumference of the chart. The chart shall have a minimum diameter of 12 inches when the minimum temperature is recorded near the center of the chart. The circular recorder chart may be 8 inches in diameter if the recorder is equipped with an accurate dual-movement mechanism of the writing stylus and the minimum temperature is recorded near the circumference of the chart. If a strip chart is used, the minimum temperature may be at the top or the bottom of the chart and the width shall be such as to meet the requirements of (b)(5) of this section.

(4) The case of the recording device shall be moisture proof under operating conditions. The design of the rotating chart support shall meet the requirements of Administrative Code Section 583(h).

(5) The recorder must be capable of recording from 30 to 160°F. or above with one degree or less lines of demarcation between 30 and 60°F. with an accuracy of plus or minus one degree in the 30 to 60°F. range.

(6) If at any time the recording device becomes inoperable, the inspection service and the buyer shall be notified immediately by the dairyman. Repair or replacement of the device shall be made immediately.

(1) The control of the recording device shall be sealed by a representative of an Approved or Established Inspection Service.

(2) The dairyman shall maintain an adequate supply of recording charts. The charts shall be those recommended for the specific instrument which is installed.

(3) The licensed Weigher and Sampler, in making a milk pick up, shall remove the chart from the recorder, mark the date and time of the pick up and sign the chart. He shall date and install a new chart on the recording device. He shall file the used charts under protected conditions provided for by the dairyman, unless they are taken to the buyer's premises for his review. If the charts are taken from the dairy, they shall be returned to the dairy within ten days from the date they were taken.

When all the milk goes to the same buyer and all lots of milk meet the temperature requirements, the temperature recording charts may be used for more than one pickup, provided that all of the pickups occur within the maximum time interval of the chart. When the chart is used for more than one pickup, the licensed Weigher and Sampler shall identify each lot of milk with the date, time of pickup, and signature.

A non-profit cooperative as defined in Food and Agricultural Code Section 61331 which maintains a processing plant, receiving station, or regular place of business may, subject to the approval of its members, file the recording thermometer charts at its place of business, provided that a copy of any chart indicating a failure to meet temperature standards is filed with the inspection agency in whose jurisdiction the dairy is located.

(4) Before removing market milk from the farm tank, the licensed Weigher and Sampler shall check the recorder chart, and if he finds temperature variations which would preclude acceptance of the product as market milk, he shall immediately notify his superior and the dairyman.

(5) If the milk is subsequently picked up as manufacturing milk, the licensed Weigher and Sampler shall sign the chart noting the date, time of receipt, and stick reading.

(6) Recorder charts shall be held at the producer dairy except as otherwise provided for 60 days and shall be available to the dairy inspector.

(7) The agitator in the farm tank shall be in operation a sufficient time during the second and subsequent milkings to preclude temperature stratification.

(8) Recording thermometers purchased prior to November 23, 1970 for installation on farm tanks or installed prior to November 23, 1970 may be accepted by the Director on an individual basis.

(9) If the vat pasteurizer is used in lieu of a storage tank on a producer/distributor dairy, the recording thermometer of the vat pasteurizer may be used in lieu of the recording thermometer which meets the requirements of Section 480.75(b).

(10) When the temperature recording device shows the temperature of the milk to be a fractional degree greater than 50°F. but less than 51°F., the milk shall be deemed to meet the 50°F. requirement.