Ma Audio M600XE Instruction Manual download pdf (Page 16)

12 World Precision Instruments

usage, the batteries will operate satisfactorily for two months or more. Replace

batteries when required or annually. Model A365R requires 16 Nickel-Metal Hydride

9-volt batteries (7.2volt); type IEC-6F22 or equivalent is recommended. Alkaline

batteries in model A365D cannot be replaced with NiMH rechargeable batteries as

model A365D is not equipped for charging. Do not use the higher voltage 9.6.V

rechargeable cells in this instrument.

Procedure

Turn the POWER switch to OFF. Remove four screws on the bottom of the instrument

case. Gently remove the entire internal instrument assembly from the outer case

by sliding the front panel forward. Unscrew and the remove padded cover plate

over the battery assembly. Remove this plate by lifting up and moving out the right

side of the instrument. When removing the batteries work from the front row ﬁ rst

on either side and ﬁ rmly pull up, but without tilting the batteries excessively as not

to damage the battery clips. Insert the new batteries with ﬁ rm but moderate force

to seat the battery in the clips. Match with care the male and female connectors

on the battery tops to the mating connectors on the battery printed circuit board.

When all batteries have been installed, reattach the battery cover plate and test the

instrument by repeating the “Quick Instrument Tests” outlined above. Nickel-Metal

Hydride rechargeable batteries may require an initial 16-hour charge, depending

on their condition when purchased. Reinsert the instrument assembly into the

outer case and secure the bottom screws. Take care to push the copper contacts

down when inserting the case. Nickel-Metal Hydride rechargeable batteries will

discharge by themselves on the shelf. If the A365 is to be stored for a length of

time (up to 3 months), then test the unit and either recharge the batteries or replace

them as necessary. For long term storage remove the batteries from the A365.

Nickel-Metal Hydride rechargeable batteries should last approximately one to two

years with proper care. The replacement batteries should be chosen from the same

manufacturer (and the same manufacturing lot number, if possible) to ensure equal

levels of drain.

Expected Battery Life

9V Alkaline main high voltage stack: 57 hours at 100% duty cycle 10 mA load;

428h @ 1 mA, 1200h @ 100μA.

7.2 V NiMH main high voltage stack: 14 hours at 100% duty cycle 10 mA load;

100h @ 1mA; 306h @ 100μA.

Typical duty cycles are 1 to 5% (At a full load of 10mA and at a 1% duty cycle the

A365 can last approximately 1000hours on alkaline cells, on NiMH this duration

is approxi-mately 260 hours, both are due to the 9V power circuit discharging ﬁ rst.

Control circuit (powered by one 9V or 7.2V battery):

Power on and not stimulating: 1000 hours ( 9 V alkaline), 260 hours (7.2 V NiMH)

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Ma Audio M600XE Instruction Manual Page 16