Table of Contents
Advertisement
If the determination time is set to 10 000 ms, a new weight is determined e.g. every
10 ms with the "Zero setting" instruction. After 10 seconds have elapsed,
the average value of all measurements will be defined as a new adjustment point.
5.3 Theoretical Adjustment – Adjustment Without Adjustment Weights
If performing the adjustment is not possible using adjustment weights, the scale
can also be put back into operation without adjustment weights, if the mechanical
structure of the scale is correct and the measuring logs are available for the
individual load cells. Execution is handled with the help of SIWATOOL FTC_B
(not in operating mode "Force measurement") during the processing of the
adjustment parameters. We call the procedure "theoretical adjustment".
First, the characteristic value range (1mV/V, 2mV/V or 4mV/V) must be defined in
the "Adjustment" tab of the data record for the adjustment data. Then, switch to the
"Theoretical adjustment" tab.
To execute the theoretical adjustment, the rated load for all load cells is defined
first, e.g. 3 load cells with 1,000 kg each result in a rated load of 3,000 kg.
The adjustment zero offset (unit μV), and the characteristic value (unit mV/V) is
then entered for each individual load cell. These values are taken from the
respective load cell measurement log. The characteristic value is normally entered
with up to 5 decimal places, e.g. 2.01201.
After entering the data for each load cell, the adjustment digits are calculated and
the result is displayed by actuating the button "Calculate adjustment digits". Then,
the calculated adjustment digits can be integrated into the data record with
adjustment data (DR 3) by actuating button "Accept calculation". The data record is
then sent to the weigh module with the new adjustment data.
Depending on the mechanics of the device, a completely empty scale may indicate
a value that deviates from the adjustment zero slightly. In this case, the instruction
"Characteristic curve shift" can be executed.
5.4 DR 4 Basis Parameter
The basis parameters define other features of a scale, which are responsible for
the basic behavior. The parameters must be checked and sometimes have to be
changed. DR 4 is not subject to write protection in calibrating operation.
Procedures:
Check all parameters and change if necessary
o
Send the DR 4 to the scale
o
Name
Reserve_4_0
BYTE
Reserve_4_1
BYTE
Reserve_4_2
WORD
Monitoring time for
TIME
recording
Device for log output
BYTE
5-48
SIWAREX FTC
Type
Address
Default
DBB000
0
DBB001
0
DBW002
0
DBD004
2000
DBB008
1
Range of Values / Meaning
Reserved
Reserved
Reserved
Time within which, a recording task must be
ended (msec)
Bit 0 :
0 = Log output to RS232 interface
1 = Log output to MMC
Reference
5.4.1
5.4.2
Advertisement
Table of Contents
