AKM 345 Gen2 Instruction Manual
(Rev No. ECN-27992)
1
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1. General
The AKM345 next generation, GEN2 for short, is a world class, robust CE approved fully
weather proofed temperature indicator, used globally for electricity transformers. It is
designed and manufactured for long and trouble free outdoor operation under all conditions.
To secure maintenance-free operation, the installation on the transformer must
be made with care.
2. Installation
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Before installation check for possible damage from transport handling.
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Do not carry the instrument by the capillary. Do not twist the capillary when unwinding
it, or bend too sharply – min radius 25 mm. Clamp it along its entire length at approx
400 mm intervals. Excess capillary can be wound in a spiral with min diam.100 mm.
•
Leave at least 15% thermal expansion space in oil filled pockets.
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The non-vibration mountings included must be used to prevent mechanical wear out
caused by transformer vibrations.
•
Installation shall prevent instrument casing temperatures over +70°C for standard
types.
3. Calibration
Check
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Each instrument is factory calibrated and no further calibration is required.
•
Check calibration put the bulb in boiling water (+100°C) or in a well stirred bath (min
water or oil volume 5 litres) with a control thermometer. Read the thermometer after 15
minutes. If indication error is larger than 5°C we recommend contacting local agent or
manufacturer for further assistance.
4. Switch
Setting
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Switches are factory calibrated.
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Each switch is individually adjustable and provided with a scale.
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Open instrument front cover by loosening the two lower retaining bolts.
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Loosen the knurled-head screw on the red pointer.
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Hold the screw in position and rotate the scale drum until the red pointer under the
knurled screw points at the desired contact point on the scale.
