Mettler Toledo MT User's Guide download pdf (Page 45)

IND780 User’s Guide

Power-Up Zero

Power-Up Zero enables the IND780 terminal to capture a new zero reference point

after power is applied. If there is motion during a power-up zero capture function,

the terminal will continue to check for a no-motion condition until zero is captured.

Power-up zero can be disabled (RESTART on power up) or enabled (Reset on

power up), and a range above and below calibrated zero can be configured. The

range is programmable from 0% to 100% of capacity and can include a positive

range and also a range below calibrated zero.

Pushbutton Zero

The pushbutton (semi-automatic) zero function can be accomplished by pressing

the ZERO

scale function key, by programming a discrete input, by a PLC or

serial command, or by an application.

The range for all types of semi-automatic zero is selectable (0% to 100%) plus or

minus from either the calibrated zero point (if power-up zero is disabled) or from

the initial zero setting point (if power-up zero is enabled).

Remote initiation of the semi-automatic Zero command is possible via a discrete

input, an ASCII ‘Z’ command sent serially (CPTZ and SICS), a command initiated

by the PLC interface, or from an application.

Tare

Tare is the weight of an empty container. A tare value subtracts from the gross

weight measurement, providing the computation of the net weight (material without

the container). The tare function can also be used to track the net amount of

material being added to or removed from a vessel or container. In this second

case, the weight of the material in the container is included with the tare weight of

the container as tare. The display then reflects the net amount being added to or

removed from the vessel.

The tare value can be displayed with the net weight. The operation of this

secondary display is determined in Setup at Terminal > Display.

Tare value

Tare units

Tare t

–

T, PT or M

Net

wei

display

Figure 2-14 Screen Displaying Captured Tare

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Mettler Toledo MT User's Guide Page 45