Maintenance In The Electronics Compartment; Fuses; Memory Batteries - Hach 910 Instrument Manual

Sigma flow meter

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5.6 Maintenance in the Electronics Compartment

Maintenance.fm

Important Note: The electronics compartment is only serviceable by a qualified

electronics technician familiar with static sensitive CMOS components. Permanent

damage to electronic circuitry may result from improper handling. Always wear a wrist

grounding strap when handling CMOS electronic components.

To open the electronics compartment, remove the four pins that hold the

electronics compartment end cap in place. The pins are located under a

protective tape on the outside surface of the logger near the end cap. The end

cap pulls straight off after all pins are removed.

All internal fuses are self-resetting and require no maintenance. There are no

other user-serviceable components inside the electronics compartment

An internal battery pack that contains two, 1.5 V dc alkaline "C" batteries

powers RAM memory, the real time clock, and associated circuitry. The

batteries also prevent the loss of programmed settings and logged data if the

main power fails or is removed.

Model 910, 920 and 930 memory batteries are located inside the electronics

compartment. The two cells will provide many years of trouble-free operation.

Use only alkaline replacement batteries.

You can set a low memory battery indicator using InSight

Software. See the software manual for details.

or Vision

Maintenance in the Electronics Compartment

Section 5

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