User's Manual

8 LS420 Universal User Manual V2.91 2003-01-21.doc
1.4 LS420 Display Options
1.4.1 Weight units
To change from pounds (lbs.) to kilograms (kg) or vice versa:
Step 1) Press the bypass and tare buttons simultaneously to enter the calibration menu.
Step 2) Press the hoist button to advance to the weight units selection screen.
Step 3) Press either the limit+ or limit- button to change from pounds to kilograms.
Step 4) Turn the display off, then on again. Adjust all load limits to conform to the new units.
1.4.2 Lock limits
To prevent the operator from changing the set limits.
Step 1) Press the bypass and tare buttons simultaneously to enter the calibration menu.
Step 2) Press the hoist button to advance to the limit locked selection screen.
Step 3) Press either the limit+ or limit- button to lock or unlock the set limits.
1.4.3 Indicator light intensity
To adjust indicator light intensity,
Step 1) Press the test button to enter the test function.
Step 2) Press the limit+ or limit- button to raise or lower indicator light intensity.
1.4.4 Display screen contrast
To adjust display screen contrast,
Step 1) Press the test button to enter the test function.
Step 2) Press the hoist button to select the display screen contrast control screen.
Step 3) Press the limit+ or limit- button to increase or decrease display screen contrast.
1.4.5 Display Screen Back-light
There are two different control systems that regulate the display screen back-light.
1) The back-light generates heat: the temperature control system permits the LS420 display to
turn the back-light on or off in reaction to extremes in internal temperature. This allows the
system to better maintain its optimum working temperature. To override the temperature
control system (i.e. when operating the display unit from a battery pack in low temperatures
or when conditions are both hot and poorly lit):
Step 1) Press the test button to enter the test function.
Step 2) Press the hoist button to select the back-light control screen.
Step 3) Press the limit+ or limit- button to select the temperature control system or the
back-light always on override.
2) When the display is operated from a battery pack, using the 4-second standby mode can
double battery life. In this mode the back-light will turn off after four seconds and turn on
immediately when a display button is pressed. To engage the standby mode:
Step 1) Press bypass and tare simultaneously to enter the calibration menu.
Step 2) Press the hoist button to advance to the back-light control screen.
Step 3) Press either the limit+ or limit- button to select the 4-second standby mode or
the normal back-light always on mode.