Specifications

02/09
Sumlog Sensor
TU00-0752-7307102
1-4
4
TU00-0752-7307102
GB
Technische Änderungen vorbehalten - Technical details subject to change
INSTALLATION INSTRUCTIONS: Viewline 85 mm
5
Calibration
After installation of the system your Viewline Sumlog must be calibrated to obtain speed and distance measurements with
the maximum accuracy.
On the Viewline Sumlog display, select the setting for the die function.
On the Viewline display, depending on the impeller being used, set the value to one of the following pulse
numbers: 12 kn: 54737 Imp/nm
50 kn: 41748 Imp/nm
60 mph: 41748 Imp/nm
Mark two distinct points on the map. The distance between these two points defines the measuring length. During the trip
from one point to the other, the Viewline 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.
Make a measuring run at a cruising speed, which remains as constant as possible.
Check 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 when passing starting point A.
Follow the measuring length on a straight line and note the indicated value
(1.7 nm in this example) when passing end point B.
Calculate the calibration factor C with the following formula:
Effectively covered distance (A-B) 2,0 nm
C= ------------------------------------------------------------ = ------------ = 1,18
Indication of the display (A-B) 1,7 nm
Multiply the calculated value C by the pulse number set on the Viewline display and set the calculated result as the new
pulse number.
In the case of a measuring run in flowing water repeat the same distance measuring steps in the opposite direction (mea-
suring length C-D).
The calibration factor is calculated with the following formula:
Effectively covered distance (A-B) + (C-D)
C= -----------------------------------------------------------------
Indication of the display (A-B) + (C-D)
Do not use the GPS navigator as a reference for Viewline Sumlog calibration. The GPS Navigator indicates speed
over ground (SOG), but the Viewline Sumlog measures speed through water.
Connection to Viewline Sumlog
5
✄
white
green
brown
+12V
Sensor
minus
Remove the plug
Strip the individual lead
Measuring length:
2,0 nm
(3,7 km)