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Instrument setup procedure
The required language option is selected from the top level tabbed window. Use the right arrow key to navigate across
the tabs to the language screen. The flag symbol is used as an icon representing language option. Simply use the up/
down arrow buttons to select the required language and press ‘OK’.
The following actions, accessed from the Settings tab window, should be taken before running a test:
1. Set date and time – Time/Date option.
2. Adjust the display backlight for optimum legibility – Display Setup option.
3. Select units - metric or imperial.
4. Set printer options.
A library of international oil test standards is preloaded into the instrument. It is important to select the test standards
that will actually be used to prevent having to navigate through the complete list. Navigate across the top level tabs
using left/right arrow buttons to the ‘Tools’ window and use the up/down arrow buttons to go to ‘Select Favourite
Tests’.
Navigate to a required test and press OK to select or deselect a standard test. Functions like, ‘SELECT ALL’ and ‘RETURN’
when all required standard tests have been selected.
Calibration
The Oil Test Sets are calibrated in the factory prior to delivery so there is no need to calibrate on initial setup.
The VCM100D/VCM80D voltage check devices can be used to confirm the output voltage of the instrument by reading
the voltage directly at the electrode before running tests. Periodic checking of actual test voltage using the VCM100D/
VCM80D is recommended. The voltage check test is accessed from the Tools tab window.
Test vessel motorised stirrer
Unpack the optional motorised stirrer assembly from its box and fit the stirrer
shaft to the underside of the stirrer assembly. The unit is ready for use. The oil
test vessel lid is removed and the stirrer assembly used as a lid for tests that
require stirring.
Megger supplies as standard with the stirrer lid assembly three impellors.
Firstly there’s the large red impeller which is useful for very dirty oil. This has larger blades to help ensure the effective
circulation of any particulates between the electrodes during the test so that the full potential of their effect on
breakdown voltage may be assessed.
The other two impellers are alternative impellers. The Impeller on the left is optimised for IEC 60156, whilst the one on
the right is ideal for ASTM D1816.
Vigorous circulation can exacerbate the inclusion of any moisture captured on the surface film of oil left behind after
rinsing at the vessel preparation stage, making the need for rapid filling even more critical, so as not to detrimentally
affect breakdown results.
Refer to application note ref “OTS_VESSEL_AN_en” for further information on vessel and impeller preparation.
Transportation and storage
The Oil Test Sets are precision instruments that generate high voltage upto 100 kV (model dependent) and need to be
transported and stored carefully.
A transportation case is available as an option and required by customers wanting to transport the OTS80PB or
OTS60PB instruments by road, rail or air.
The unit should be stored in a room or area where the environment is within the temperature range of -30 ºC to 65 ºC
and maximum humidity of 95% at 45 ºC.
