LW Measurements LWC 800 - Manual (Page 19)

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4.1.2 Key Functions:
1. The ON/OFF key is to turn the Scale On or Off
2. The HOLD key is to store the weight value.
3. The UNIT key is to toggle different weighing units.
4. The ZERO key: Zero feature if load weight below 4% of full capacity;
TARE feature if load weight between 4% to 100% of capacity.
5. The PRINT key is to send data to external device through RS232
connector.
4.2 Program options
Please see our web-site at
http://www.lwmeasurements.com for practical
demonstrations of applicable usage if you purchased your scale within
the continental U.S.
4.2.1 Interface Settings

Press and hold the HOLD key, and then press ON/OFF key to turn on
the scale, display will show A-ON or A-OFF

Press UNIT key, display will show
“L-ON” or “L-OFF” or “L-Au”

Press UNIT key again, display will show
“P-XX”

Press ZERO key to select CON,OFF, KEY, STB
a) OFF stands for serial data output disabled
b) KEY stands for manual mode by pressing [PRINT]
c) STB stands for automatic print when scale is stable
d) CON stands for continuous print