Rice Lake SCT-10 - Manual (Page 48)

44 SCT Weight Transmitter Operator’s Manual
'8' for division value = 50
'9' for division value = 100
Zero Setting
(See Section 2.1.3)
The PC transmit the following ASCII string containing the zeroing command:
$aazckckCR
in which:
z = weight zeroing command (122 ASCII)
Possible instrument responses:
- correct reception: &aaxxxxxxt\ckckCR
- incorrect reception: &&aa?\ckckCR
- If the instrument is not in gross weight displaying condition, the
response is: &aa#CR
in which:
xxxxxx = 6 characters for the required weight value;
t = weight identification code (116 ASCII).
Example: Weight zero setting for instrument with address 2:
For the calibration, make sure that the scale is empty and the instrument
measures a corresponding mV signal.
query: $02z78(Cr) response: &02000000t\76(Cr)
In case of correct weight zero setting the read value (response) must be 0 (in the
string “000000”).
The zero values are stored to the EEPROM memory, please
note that the number of writes 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.
Weight (Span) Calibration (With Test Weights)
(See Section 2.1.5)
After having performed the ZERO SETTING (see Section 2.1.3 “Zero Setting”
on page 15), this function allows correct calibration to be done using test weights
of known value and, if necessary, any deviations of the indicated value from the
correct value to be corrected.
Load onto the weighing system a test weight, Load the test weight onto the scale,
use as high a percentage of the maximum quantity to be weighed as possible.
Otherwise make sure that the instrument measures a corresponding mV signal.
The PC sends the following ASCII string containing the calibration command:
$aasxxxxxxckckCR
in which:
s = calibration command (115 ASCII)
xxxxxx = 6 characters for test weight value.
Possible instrument responses:
- correct reception: &aaxxxxxxt\ckckCR
- incorrect reception or full scale equal to zero: &&aa?\ckckCR
Important