Vanguard ATRT-01 S2 - Manual (Page 17)

REV 2 ATRT-01 S2, ATRT-01B S2, AND ATRT-01D S2 USER’S MANUAL
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2.2 ATRT-01B S2 Operating Power
The ATRT-01B S2 is powered by a rechargeable (6 Vdc / 7 AH) sealed lead acid gel battery. The
unit can operate continuously for up to 6 hours between charges. It can also be used while
charging. Plugging the ATRT-01B S2 into an ac power outlet after the battery is fully charged will
not damage the battery.
NOTES
• It is recommended that the ATRT-01B S2 be plugged into an ac outlet when it is
not in use.
• The ATRT-01B S2 battery can be replaced with the Panasonic model
LC-R122R2PU battery.
2.3 ATRT-01D S2 Operating Power
The ATRT-01D S2 is powered by six standard D cell batteries. We recommend industrial (1.5
volts) D cells such as the Duracell 1300.
To turn the unit on or off, press and hold the [POWER] switch for 2 seconds.
2.4 LCD Screen Contrast Control
To increase the LCD screen contrast, press and hold the [∧ Contrast] key for two seconds.
Release the button when the desired contrast level has been reached.
To decrease the LCD screen contrast, press and hold the [∨ Contrast] key for two seconds.
Release the button when the desired contrast level has been reached.
For the ATRT-01B S2 and ATRT-01D S2, the back-light turns off after 30 seconds of operation to
conserve power. Press any key on the keypad to re-light the back-light.