Sartorius CH3G Instructions d'exploitation télécharger pdf (Page 63)

Range 1, Range 2, Range 3

Here you can enter the limits for each

of the weighing ranges. When a limit

is exceeded, the accuracy changes.

The following applies when entering

range limits:

Range 1 < range 2 < range 3

< maximum capacity.

Thus, you can divide the weighing

capacity into four ranges.

The resolution changes in intervals

of 1, 2, 5, 10, 20, 50, etc. The lowest

resolution is equal to the specified

lowest scale interval d. Set unused

ranges to 0.

Maximum Capacity (Max. Cap.)

The maximum capacity is the maximum

load that may be placed on the

weighing instrument. If a heavier load

is placed on the platform, the display

shows

The scale intervals are calculated from

the maximum capacity and the lowest

scale interval d. In legal metrology,

the number of intervals must not

exceed 3000 e; for multi-interval

scales, the limits is 3000 e per range.

In Standard operation, as opposed

to legal metrology, you can define

a “SuperRange” weighing instrument

with more intervals. For example, a

maximum capacity of 30,000 kg with

a lowest scale interval d of 0.001 yields

30,000 scale intervals. These parame-

ters, however, may be influenced by

physical restrictions.

Available Units

With this function, you can make

particular weight units (Weight unit x;

x=1, 2) inaccessible during weighing.

Available units are indicated by a circle

(o) on the display (more than one

can be selected). To enable or disable

a unit, select the unit by pressing

the Q or q soft key, and then press

the l soft key (toggle function).

Calibration/Adjustment Unit

This setting defines the weight

unit with which calibration must be

performed. The calibration unit remains

the same, even when a different weight

unit is used during normal weighing

operation. The selected weight unit is

marked by a circle (o). To change the

weight unit, select the desired unit by

pressing the Q or q soft key and press

the l soft key to confirm.

Save Parameters

Select “Yes” by pressing the Q soft key

and press l to confirm; the A/D con-

verter configuration settings are stored.

The device software is reset, and the

scale returns to the normal weighing

mode. The Service mode is deactivated.

To exit the menu without saving

configuration changes, press the

o soft key.

Once these parameters have been

configured, the A/D converter in

conjunction with the load cell(s) is

defined as a weighing instrument.

The A/D converter, in conjunction with

the weighing platform, can now be used

like any standard weighing platform.

In addition, the weight unit must

be defined and the weighing platform

adjusted (calibration, adjustment

and linearization must be performed).

For a detailed description of these

procedures, see the chapter entitled

“Calibration and Adjustment.”

Adjust without Weights

Open this submenu from the

“Calibration/Adjustment” menu

(refer to the menu tree diagram

on the previous pages).

Open the “Input parameters”

submenu to enter the parameters for

“Nominal load” (in kg; specification of

the strain-gauge beam), “Resolution”

(in kg) and “Sensitivity” (in mV/V;

under “Sensitivity 1”). These values

are converted to internal quantities.

Once the A/D converter configuration

data has been stored (by selecting the

“Save parameters” menu item), these

parameters can no longer be read. For

weighing platforms with multiple load

cells, you can either enter sensitivity

of the other load cells individually

(“Sensitivity 2” through “Sensitivity 4”

for load cells 2 through 4), or enter

the mean value of all sensitivities under

“Sensitivity 1” (and enter “0” for

“Sensitivity 2” through “Sensitivity 4”).

Save the values entered for these

parameters by selecting the “Save

parameters” menu item.

Geographical Data

This is a submenu of the “Calibration/

Adjustment” menu (see the menu tree

diagram on the previous pages) and is

described in detail in a separate section,

starting on page 79.

! Note:

After configuring the A/D converter

and adjusting the weighing instrument

(calibration, adjustment and lineariza-

tion), return the menu access switch (17)

to the “closed” position.

Once the A/D converter configuration

has been locked (menu access switch

closed), the indicator can no longer be

used to influence weighing results.

The scope of functions available in the

weighing instrument is defined by the

A/D converter. Weighing functions that

can be activated include:

– Read weight values

– Tare the scale

– Calibration/adjustment

– Read tare value

– Save/delete tare input

– Zero the scale

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Sartorius CH3G Instructions d'exploitation Page 63

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