Real Calibration (With Sample Weight) - LAUMAS TLU Installation And User Manual

where: xxxxxx = 6 characters to indicate the required weight value;
t = 1 character to indicate the weight (116 ASCII).
Example: Zeroing the weight of the instrument with address 2:
For the calibration you have to make sure that the system is unloaded or that the instrument
measures a signal equal to the mV in the same situation:
query: $02z78(Cr)
If the zeroing works correctly the instrument sends the zeroed weight value ( "000000").
The zero values are stored to the EEPROM memory, please note that the writing
number allowed is limited (about 100000). If it is necessary to reset the weight quite
often, it is recommended to perform it by PC or PLC program, keeping in mind the
weight deviation respect to the zero instrument.
8.

REAL CALIBRATION (WITH SAMPLE WEIGHT)

After the tare zero-setting, this function allow the operator to check the calibration obtained
by using sample weights and correct automatically any change between the displayed value
and the correct one.
Load onto the weighing system a sample weight, which must be at least 50% of the Full Scale, or
make so that that the instrument measures a corresponding mV signal.
The PC transmits the following ASCII string containing the calibration command: $aasxxxxxxckckCR
where: s = calibration command (115 ASCII)
xxxxxx = 6 characters to indicate the value of sample weight;
Possible instrument responses:
- correct reception: &aaxxxxxxt\ckckCR
- incorrect reception or Full Scale equal to zero: &&aa?\ckckCR
where: t = character of gross weight identification (116 ASCII).
xxxxxx = 6 characters to indicate the value of current weight.
In case of correct reception, the read value has to be equal to the sample weight.
Example: calibration of the instrument no. 1 with a sample weight of 20000 kg:
query: $01s02000070(Cr)
In case of correct calibration, the read value has to be "020000".
response: &02000000t\76(Cr)
response: &01020000t\77(Cr)
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