Delmhorst Instrument TechCheck PLUS - Manual (Page 4)

Copyright  2009, Delmhorst Instrument Co.
Page 4 of 33
OPERATING INSTRUCTIONS
-User Guide-
This guide provides step-by-step instructions on powering up, using and powering down the
meter.
NAVIGATION:
The meter uses an on-screen, menu-driven approach to navigate through the meter features,
allowing for an intuitive understanding of keypad functions. Each screen presents the user with a
number of selectable options. One of the options is always selected and the user can move
(navigate) the selection to any other available option. The keypad is aimed at providing
navigational control, and not at accessing specific features. There are four directional keys
aligned intuitively around a middle (fifth) key (see Figure 1): Above (UP), below (DOWN), to the
right (RIGHT) and to the left (LEFT). The middle key is used to SELECT the option highlighted on
the screen. For purposes of this owner’s manual, the five keys will be referred to as
п р с т and SELECT.
INSTALLING THE BATTERY:
The battery compartment is located on the underside of the case, at the bottom of the handle.
1. Open the battery compartment by sliding the lid back while pressing on the release indent.
2. Ensure correct polarity, and push the battery in flush with the bottom board until the
connectors snap together on both sides.
3. Replace the battery compartment lid.
LOW BATTERY:
The meter features a battery status monitor, designed to warn the user as well as protect
measurement accuracy from impending battery failure conditions. The battery warning is
triggered by either continuous or temporary low voltage conditions. Visible (a battery icon on the
top right side of the display) and audible (buzzer warble) indicators accompany a battery warning.
Once a permanent low battery condition is detected, all measurement functions are disabled. The
battery should be replaced immediately. If the battery reaches critical levels, the meter will refuse
to stay on at power-up. This gradual warning system is intended to provide the user advanced
battery status notice and give ample time for replacement before operational limitations occur.
NOTE: Current meter settings are not lost during battery replacement or low battery conditions.