User manual VDO SUMLOG

[. . . ] They are an indication of particular importance regarding the operation of the system and for your safety. The use of the sumlog does not relieve you of your responsibility for your ship. Always use your personal seafaring experience when interpreting the displayed values. Safety Instructions concerning the installation The system components should be installed by your shipyard or by a specialist. Use adequate working clothes if you install the system yourself. [. . . ] The indicating unit has a front pushbutton for the necessary basic settings and for the selection of the displayed value. Up to two repeaters can be connected to the main instrument. 26 VDO SUMLOG System components The system, as supplied, consists of: Indicating instrument Union nut for indicating instrument fixation Sumlog sending unit with paddle wheel and cable, length 1 m Connecting cable between sending unit and indicating unit, length 10 m Hull sleeve for Sumlog sending unit, with sealing washers and fixation nut Flooding valve for Sumlog sending unit Blind plug for Sumlog sending unit with control rope Installation and operating instructions Accessories (not supplied with the system): - Fixation parts kit (studs and bracket) - Lighting parts kit (24V / 1. 2W) - Second indicating instrument VDO Sumlog 0 - 12 - Second indicating instrument VDO Sumlog 0 - 30 - Second indicating instrument VDO Sumlog 0 - 50 - Second indicating instrument VDO Sumlog 0 - 50 (kn/mph) N05 800 792 N05 800 550 N01 110 902 N01 110 908 N01 110 920 N01 110 914 Spare parts - Paddle wheel with shaft (12 kn, km/h, mph) - Paddle wheel with shaft (30 and 50 kn, km/h, mph) - O-ring for sending unit / blind plug (1x) - Illumination parts kit (12V / 1. 2W) Other spare parts are available on request. 270. 023/005/003 270. 023/005/005 N05 800 374 N05 800 552 27 FUNCTIONS / CALIBRATION The functions of the VDO Sumlog The analog indication shows the boat speed, while the display shows either the total distance or the trip distance travelled, depending on the selection, when the power is switched on. The distance is selected by short activation of the pushbutton. Example: Indication of the total distance (2312. 3 in this example) 23I2. 3 or of the trip distance (12. 96 in the example) The units of the indicated speed and distance depend on the selected calibration factor (see page 29). The total distance is displayed from 0. 0 to 99999. 9 and the trip distance from 0. 0 to 999. 99, thereafter the counter rolls over to zero again. The trip distance is reset to zero by keeping the pushbutton pressed for about 5 seconds when the trip distance is displayed. Calibration of the VDO Sumlog After installation of the system your VDO Sumlog must be calibrated to obtain speed and distance measurements with the maximum accuracy. The distance between these two points defines the measuring length (see page 29). During the trip from one point to the other, the VDO Sumlog measures the covered distance. In flowing waters it is necessary to make the measuring run in both directions to compensate for the influence of the current. For indicating units with a simple graduation (12, 30 or 50 without unit indication): Select the desired display unit (knots, mph or km/h) for your operation prior to the measuring run. Please note that it is not possible to switch to a different indicating unit after calibration; this requires a new calibration. For the indicating unit with twin graduations (50 kn/mph): Select nautical miles as the unit for the measuring length. 28 CALIBRATION Measuring length: Make a measuring run at a cruising speed, which remains as constant as possible. Check that the calibration factor is C=1. 00 (as supplied) at the beginning of the measuring run, and that the trip distance counter is set to zero. The following example refers to a measuring run in water without a current with a measuring length of 2 nautical miles (nm). Approach starting point A of the measuring length. Set the trip distance counter to zero (see page 28) when passing starting point A. Follow the measuring length on a straight line and note the indicated value (1. 74 nm in this example) when passing end point B. Calculate the calibration factor C with the following formula: Effectively covered distance (A-B) 2. 00 nm C = --------------------------------------------------- = -------------- = 1. 15 Indication of the display (A-B) 1. 74 nm Enter the calculated calibration factor C (1. 15 in the example) as follows: Keep pushbutton pressed and switch the indicating unit power supply on. The display shows , , CAL". 2 (3 , 0 , 7 nm km ) CAL Release the pushbutton. The current calibration factor is displayed (as supplied: 1. 00): c 1. 00 29 CALIBRATION Press the pushbutton to increment up to the calculated calibration value. Each press increments the value by 0. 01. Incrementing is automatic if you keep the pushbutton pressed. c 1. 15 The calibration factor setting range is from 0. 50 to 2. 50. On reaching 2. 50 the counter rolls over to the calibration factor 0. 50 again. The set calibration factor is stored if the pushbutton is not activated for a further 5 seconds. The display then automatically changes to display the total distance. [. . . ] Always insert the blind plug when the sending unit has been removed. 35 INSTALLATION Replacement of the paddle wheel The paddle wheel of the sending unit is rotated by the flow of water. The rotational speed of the paddle wheel is measured without contacts, and transmitted to the indicating instrument. Use a screwdriver to replace the paddle wheel and its shaft. Carefully lift the paddle wheel shaft upwards to remove it from the sending unit. Insert the new shaft into the new paddle wheel and install shaft and wheel, again using the screwdriver. [. . . ]