Vishay DXP10, Руководство оператора, Страница: 16 / 42

3-5
Table 3-3B. Calibration in Monitor Mode
ASCII Command in Order of
Operation Serial Output Explanation
E CAL Enter Calibration Mode
M 000
ZERO
Zero Setting
Z 000
Acquire
Acquire Zero
E CLEAR Clear Old Span Point(s)
M-Z or E SPANS Span Setting
M 5100.00
166329
Span 1 Value
Internal Counts
X SPANS Skips Span
E Adjust Change Spans
M 000 (flashing)
SPAN 1
Adjust Span1
M 0000 (flashing) Acquire Span 1
M & I/D 1000.0 Enter Span 1 Weight Value
Note: Use M & E to access and
change spans 2-5 if desired.
E E Normal Weighing Exit CAL Mode
3.4 CHECK CAL
The standard transmitter is provided with a check
cal feature that can be operated manually by
pushing a button on the DXp operator panel (see
Figure 3-1) or remotely via the serial port. This
feature provides a check of the instrument
calibration to verify that drift or other problems
have not occurred. Check cal uses an internal
shunt resistor circuit to provide a fixed repeatable
signal into the input of the transmitter. The input
signal produces a known output which can be
verified by viewing the terminal/meter used to
perform calibration.
Due to the infinite variety of calibrations and
applications, a range of shunt calibration values
are available by changing the position of the
resistor circuit component carrier in socket U6 on
the A/D board. Access is obtained by removing the
card rack cover and should be performed by a
qualified technician. In most cases, a value that
produces a signal equal to 80% of system capacity
is desired. Table 3-4 lists the positions and
resulting percent of output given a typical 2.0 mV/V
load cell application.