MTS Series 315 Load Frame - Manual (Page 31)

Series 315 Load Frame Maintenance 31
Checking the Accumulators’ Precharge
An accumulators’ correct precharge pressure is written on its label. Begin by
checking precharge pressures at least once a month.
See the Series 111 Accumulator Product Information manual for the complete details on
checking the precharge intervals and servicing the accumulators.
Record both the pressures and the room temperature in a log book. Use these
readings as a basis for increasing or decreasing the interval between pressure checks.
Generally, recharging is required when there is a change of ±1.4 MPa
(200 psi) in the pressure line accumulator or ±50% in the return line accumulator.