Martel Electronics DPC300A - Manual (Page 6)

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• When servicing the calibrator, use only specified replacement
parts.
• To avoid false readings, which could lead to possible electric
shock or personal injury, replace the battery as soon as the battery
indicator appears.
Caution
To avoid possible damage to calibrator or to equipment under test:
• Use the proper jacks, function, and range for your measurement or
sourcing application.
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