Plus-Minus Weighing; Weighing With Free Factor And/Or Selectable Display Increments - Mettler Toledo AL Serie Instrucciones De Manejo

Functions
20

5.4 Plus-minus weighing

The plus-minus weighing function enables the parts or quantities dispensed on the weighing pan to be compared with a target
weight and tolerances set by the user. Symbols in the display (ÇokÉ) help the operator to assess the weighing result quickly.
Requirement
The function "F PM" must be activated in the menu (Section 4).
0. 0 0 g
15. 1 3 g
F
- ok +
tArGEt
ok
*
15. 1 3 g
± ± ±
± ±
▼
-
toL•
▼
-
1. 0 0
" " " " "
-
1. 0 1
" " " " "
-
5. 0 0
ok
15. 1 3 g
±

5.5 Weighing with free factor and/or selectable display increments

In this menu option a custom "free factor" can be defined at will.
This value is then either multiplied ("F FAC M") by the weighing result (in grams), i.e. reading = factor * weight, or it is divided
("F FAC d") by the weight, i.e. reading = factor / weight. The range over which this factor can be selected depends on the weighing
range and the readability of the model concerned.
The "free factor" (FAC M) function can, for example, be used to calculate the price of the material weighed directly or to calculate
the weight per defined unit of surface area. It can also be used to convert the weight into any desired alternative unit. This facility
for dividing the factor by the weight (FAC d) is required for instance in the textile industry to determine yarn count.
The ability to select the display increments makes it possible to specify how the weighing result is to be presented, the choice of
display increments being limited by the set factor and the resolution of the balance model itself.
Setting target weight and tolerances (+/-)
➞ Place the target weight on the weighing pan. Minimum weight = 10d (display
increment)
➞ Hold down the «F» key until "tArGEt" appears.
➞ Press the «"
deactivated).
➞ Confirm this with the «±
seconds if no action is taken.
The target weight is displayed again for a further two seconds, following which the
display changes ("toL="), prompting you to enter the tolerances as a percentage of
the target weight.
The displayed default value can be changed:
➞ Pressing the «"
+
%
Pressing the «1/10d» reduces the tolerance.
Pressing the key once changes the value by one increment. If the key is held down,
+
%
the value changes increasingly rapidly.
➞ Confirm the selected tolerance with the «±
after 7 seconds if no action is taken. The target weight and the tolerances have
+
%
now been set.
Displayed weighing results
The display indicates the weighing status as follows:
+
%
"Ç" lights up: The weight on the pan is less than the set lower tolerance.
"Ç" and "ok" light up: The weight on the pan is within the set tolerances, but below
target weight.
"ok" lights up: The weight on the pan is exactly equal to the target weight.
"ok" and "É" light up: The weight on the pan is within the set tolerances but greater
than the target weight.
"É" lights up: The weight on the pan is greater than the set upper tolerance.
Toggling between plus-minus weighing with weight display and percent display
➞ Place the sample on the weighing pan. Its weight is shown in unit 1.
➞ Press the «"
balance is activated for unit 2 and the key is pressed again).
➞ To return to the plus-minus weighing display: press the «"
" » key to select "tArGEt" and "notArGEt" (Plus-minus weighing
" "
"
± » key; the target weight is adopted automatically after 7
± ± ±
" » key increases the tolerance.
" "
"
" » key. The weight is then displayed as a percentage (provided the
" "
"
± » key; it is adopted automatically
± ± ±
" » key again.
" " "