Seca 780 - Optional functions; Tare; Hold and Autohold; Replace weight in repeat measurements

function. To initiate the function, another button must be pressed when the scale is started. The
verification counter is then displayed which is incremented whenever the scale is recalibrated. It
enables the user to check whether the scale was manipulated. If, within five seconds, the button is
pressed longer than 1.5 s, the scale switches to recalibration mode. The scale now measures the
zeropointand waits to be loaded with at least Vi of the maximum load. By briefly pressing the button
the weight displayed can be decremented or incremented in steps of lOg until the weight of the load
placed on the scale is reached. The direction can be changed by pressing the button longer. To
stop recalibration the button must be pressed longer than 5s. The scale can be switched off any time
using the on/off button or by not actuating it for a while, thus aborting recalibration.
Optional functions
The functions "Tare", "Hold", "Autohold" and "Replace weight in repeat measurements" and various
menu functions can be implemented via a program on the EEPROM (on the weight measuring
module). The functions are explained below:
Tare:
The tare function can be assigned to a button by the EEPROM program. If the button is pressed, the
weight is tared out as soon as the display has settled, if it is within the permissible range. Pressing
the button again alternatively switches the tare function off or causes the weight to be tared out
again.
Hold and Autohold:
If the hold function is assigned to a button by means of the EEPROM, the weight reading is held on
display when the button is pressed as soon as the value has stabilized. Alternatively, the hold
function can be automated so that the weight will always be frozen when it has exceeded a certain
threshold and is stable.
The hold function is switched off after expiry of a predetermined time or by pressing the button
again. In addition the scale can be configured so that the hold function will be deactivated when the
scale is relieved, when the scale is relieved and then loaded again and / or when the load on the
scale changes significantly.
Replace weight in repeat measurements:
The scale can be configured so that the weight last displayed is displayed again in a measurement
when the scale detects that it has been loaded with almostthe same weight.
Menu functions:
Not all the functions listed below can be activated on the same scale.
When the menu button is pressed long enough, the scale switches to the setting mode. Here,
damping and weight display settings can be made.
When the button is pressed briefly, the scale switches to function mode. The following functions are
possible:
• BMI: From weight and height the body mass index is calculated using the following formula
BMI = weight[kg] / length[m] 2 BMI = weight [kg] / height [m] 2 .
• IDE: The deviation from the ideal weight calculated using the formula
0,9 x (length[cm\ - 100 ) 0.9 (height[cm] - 100) is displayed.
• UL: When a limit weight is overshot or undershot an acoustic signal is generated.
• DIFF: The difference to a second weight is output. The second weight can have been measured
using the autohold function, entered manually or stored when the difference function was last
called.
Technical data
Supply voltage:
Supply current:
Quiescent current:
30-34-00-618
2.7V - 3V and 2.7V - 15V (via SeSAM bus)
typ. 0.5mA + power supply for backlighting (typ. 100mA)
typ. 2pA
3 06.09.1999
EE/Jensen