52 MANUAL OF MARINE METEOROLOGICAL OBSERVATIONS 



6232. INSTALLATION OF BAROGRAPH CHART. On most types of 

 barographs the form is removed and the new one put on in the following 

 manner: 



6232.1. Remove the case cover. Barograph Model G-220 is unlatched at 

 the base and the cover swung to the left allowing the case cover to rest 

 on the same plane as the base. Barograph Model G-222 is provided with an 

 airtight case. To remove the cover rotate the catch wings clockwise and 

 swing the catches away from the case. Lift the case cover STRAIGHT UP 

 carefully so that its flange will not catch the pen. 



6232.2. Raise the pen from the form with the lever provided for that 

 purpose and open the case and remove the cylinder from the barograph. 

 Loosen the clip holding the form and remove the used sheet (use care 

 to avoid smearing the wet ink). Wind the clock. If any adjustments are 

 necessary for gain or loss of time, barograph Model G-220 is provided 

 with a small inspection hole in the top of the cylinder for this purpose. 

 Clock adjustments to barographs Model G-222, when necessary, will be 

 made by the Weather Bureau personnel. 



6232.3. Wrap the new chart around the barograph cylinder so that it fits 

 the cylinder tightly, and that its bottom edge is in contact with the flange at 

 the bottom. When the chart is correctly placed, the ends of the horizontal 

 coordinate lines will match. 



6232.4. Place the clip bar over the end of the chart and smooth out the 

 bulges. While holding the chart snugly in place, slide the metal retainer into 

 the slot in the chart drum flange and into the recess in its upper rim. 



6232.5. Fill the pen with No. 10 barograph ink. This is a slow drying ink 

 which does not require a large pen reservoir. Take care to avoid getting 

 ink on the exterior surfaces of the pen or spilling ink on parts of the instru- 

 ment. 



6232.6. Place the cylinder on the barograph and turn it clockwise until the 

 pen has nearly reached the time line on the chart. Lower the pen on the 

 chart. The clock is then set to time by turning the chart drum clockwise 

 until the recording pen is brought to the proper time line on the chart. 



6232.7. Replace the case cover. In the case of Barograph Model G-222 

 care should be taken not to touch the pen with the case flange. The case 

 should be lowered STRAIGHT DOWN. 



6233. CHART ENTRY. On each chart removed from the barograph: 



6233.1. Enter the date and pen-up time in the spaces provided for 

 "Chart- off and date and time." 



