BALUN BL510 Manuale d'uso - Pagina 18

Sfoglia online o scarica il pdf Manuale d'uso per Apparecchiature di prova BALUN BL510. BALUN BL510 20. Portable deadweight tester

 Corrosive contaminants in the oil may damage the piston and cylinder assembly.

 Fill the oil reservoir through the filler cap with mineral oil or sebacate (≥25MPa) before an instrument is

used for the first time. The oil level must be maintained above the lower end of the cylinder, or the gas

will bypass the oil. When field temperatures are extremely cold, fill the reservoir with SAE 10 non-

detergent motor oil or equivalent oil. Maximum sensitivity of the instrument to pressure requires that

the oil be "light" at the time of measurement.

 For the instrument to be sensitive, the metal-to-metal interface of its piston and cylinder is designed to

allow for the minor escape of oil past the piston to minimize friction and lubricate the piston. Therefore,

some leakage past the piston is normal and necessary. A moderate escape of oil can be controlled by

adding heavier oil. Excessive leakage or "blowing" of oil past the piston indicates excessive wear of the

assembly and requires replacement of the assembly. If the model and serial numbers of the instrument

are furnished, the piston and cylinder assembly and the weights can be replaced without need for

factory calibration.

 Replace hydraulic oil (do not use brake fluid, shock absorber, or transmission fluid) in the reservoir with

mineral oil or sebacate (≥25MPa) when the test fluid or gas (oxygen) will be reactive with the hydraulic

oil. For oxygen gauge test, recommend Baluntech water media deadweight tester.

6.3 Maintenance schedule

 Change oil: Every 6 months or as necessary

 Change O-ring: Every 6 months or as necessary

 Re-calibration: Every 2-5 years

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