Service Manual RU OHAUS
Page 8 / 53 11/01/2010 Ohaus
2.4 Weighing Capacity
The RU is available in 3/6kg x 0.001/0.002kg, 6/15kgx0.002/0.005kg, 12kgX0.002kg
and 30kgx0.005kg capacities. The scale is designed to withstand static overloads up to
five times the rated capacity without sustaining permanent damage. A weight greater
than five increments over capacity causes the weight display to "-----" and printing is
inhibited. If the scale is under zero by more than five increments, the weight field will
display dashes "|_____|". When zero can not be captured, the weight field will display
EEEEE.
2.5 Tare
Tare is limited to a maximum of 2/3 full capacity.
2.6 Memory Specifications
The Main Logic PCB contains a rechargeable lithium battery that will retain backup
PLU's and the time/date in the SRAM memory for up to one month. Other data,
including calibration data are retained in the EEPROM which requires no battery for
memory retention.
2.7 Label Printer
Labels can be printed with the built-in thermal label printer. The standard printer uses a
54mm wide, high resolution, 8 dots/mm, thermal Printer head. The printer driver PCB
incorporates a heat detection circuit to ensure the best possible print quality while
eliminating any possibility of overheating the head. Overheating is the major cause of
premature Printer head failure. The print speed and density can be adjusted via
SERVICE MODE to compensate for varying types of labels.
The printer supports standard label sizes ranging from 25mm to 102mm long, and
continuous strip stock or continuous thermal paper. Labels can be loaded in a stripped
or unstripped mode. In stripped mode, the labels automatically peel from the backing
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