Humboldt H-3250 Length Comparators - Manual (Page 8)

TOTAL RESET:
To clear all settings and return to factory set defaults:
Press and hold 2ND until 2nd appears on bottom display
and then release.
Press and release ON/clr within 3 seconds
Press and release CHNG within 3 seconds
Internal Memory
Digital indicators include internal non-volatile memory to store all factory default
and user settings. When the indicator is turned on, user settings and preset
numbers will be the same as when the indicator was turned off.
Note: Many of the user settings are stored when the indicator is turned off by
using the "OFF" key, or when the indicator turns itself off (AUTO OFF). However,
if the indicator is turned-off by removing power (disconnecting the AC adapter
or cutting power through the Data I/O connector), some or all of the user set-
tings and/or changes may be lost.
Maintenance
Since indicators have precision bearing surfaces, frequent cleaning of the
spindle to prevent sluggish or sticky spindle movement is recommended.
Although dry wiping of the spindle with a lint free cloth will usually suffice, iso-
propyl alcohol can be used if necessary to remove gummy deposits.
Do not apply any type of lubricant to the spindle.
The bezel and front face can be cleaned using a soft cloth dampened with a
mild detergent. Use of aromatic solvents could cause damage. Spindle dust cap
and spindle boot are available if the gauge is to be operated in very dirty or
abrasive environments.
For digital indicators removal of batteries is highly recommended if the
indicator is to be stored or operated on AC adapter power for an extended
period of time, to prevent damage to the indicator from battery leakage or
corrosion. A periodic check of the batteries for corrosion or leakage is also
recommended.