ATC770 Microprocessor-Based Pressure/Process Controller
47
the display. Press the
▲
key until
2 shows in the upper display. Press the
FUNC
key and the lower
display changes to
ZERO.C. The upper display shows OFF. Press the
▼
or
▲
keys until the upper
display changes to
ON. Press the
FUNC
key to calibrate the zero value. The lower display changes
to
SPAN.C. The upper display shows OFF. Press the
▼
or
▲
keys until the upper display changes to
ON. Press the
FUNC
key to calibrate the span value. When the legend
DSP.FL appears in the lower
display, calibration is complete. Press
A/M
to return to the operating screen.
7.1.4 C
ALIBRATION
OF
A
NALOG
I
NPUTS
U
SING
A
P
RESSURE
C
ALIBRATION
S
OURCE
Be sure that full scale and low scale values have been set to the range of the process sensor. Press
the
FUNC
key until
nonE and GROUP show on the display. Press the
▲
key until
4 shows in the
upper display. Press the
FUNC
key and the upper display should show
OFF while the lower display
shows
SHUNT. If the upper display does not show OFF, press the
▼
or
▲
key until the upper display
changes to
OFF. Press the
FUNC
key to set the value and press
A/M
to return to the operating
screen.
Press the
FUNC
key until
nonE and GROUP show on the display. Press the
▲
key until
2 shows in
the upper display. Press the
FUNC
key and the lower display changes to
ZERO.C. The upper display
shows
OFF. With low scale equivalent signal applied from an appropriate calibration source, press
the
▼
or
▲
keys until the upper display changes to
ON. Press the
FUNC
key to calibrate the zero
value. When the lower display changes to
SPAN.C, zero calibration is complete. With signal applied
equivalent to full scale value from an appropriate calibration source, press the
▼
or
▲
keys until the
upper display changes to
ON. Press the
FUNC
key to calibrate the span value. When the legend
DSP.FL appears in the lower display, calibration is complete. Press
A/M
to return to the operating
screen.
These inputs are factory pre-calibrated for the following ranges, and require no further calibration.
Voltage:
0-10 VDC
Current:
4-20 mA; 0-20 mA.
7.1.5 C
ALIBRATION
OF
THE
ATC770
TO
C
ALIBRATED
L
INEAR
A
NALOG
I
NPUT
Be sure that full scale and low scale values have been set to the range of the process sensor. Press
the
FUNC
key until
nonE and GROUP show on the display. Press the
▲
key until
4 shows in the
upper display. Press the
FUNC
key and the upper display should show
OFF while the lower display
shows
SHUNT. If the upper display does not show OFF, press the
▼
or
▲
key until the upper display
changes to
OFF. Press the
FUNC
key to set the value and press
A/M
to return to the operating
screen.
Press the
FUNC
key until
nonE and GROUP show on the display. Press the
▲
key until
2 shows in
the upper display. Press the
FUNC
key and the lower display changes to
ZERO.C. The upper display
shows
OFF. With the input at the low scale value, press the
▼
or
▲
keys until the upper display
changes to
ON. Press the
FUNC
key to calibrate the zero value. When the lower display changes to
SPAN.C, zero calibration is complete. Press the
▼
or
▲
keys until the upper display changes to
Summary of Contents for ATC770
Page 19: ...ATC770 Microprocessor Based Pressure Process Controller 19 Fig 2 ATC770 Outline Drawing...
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Page 30: ...30 Fig 6 Remote Set Point Jumper Location Board E...
Page 84: ...NOTES...
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