46
that a specific signal from the input device is equated to a specific pressure and no other, (to
the capabilities of its input resolution)
Apply power to the cabinet and allow the system to stabilize for about 30 minutes. Allow the
transducer or other input device to come up to operating conditions.
7.1.1 C
ALIBRATION
OF
P
RESSURE
T
RANSDUCERS
E
QUIPPED
WITH
AN
I
NTERNAL
S
HUNT
R
ESISTOR
Be sure that the full scale and low scale values (
PI.FSV and PI.LSV) have been set to match the range
of the transducer and that the
SHUNT function is ON and set to the correct percentage (80% for a
typical Dynisco transducer).
To calibrate the transducer to the instrument, 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. 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.
7.1.2 C
ALIBRATION
OF
A
MPLIFIED
P
RESSURE
T
RANSMITTERS
E
QUIPPED
WITH
AN
I
NTERNAL
S
HUNT
R
ESISTOR
Be sure that the full scale and low scale values (
PI.FSV and PI.LSV) have been set to match the range
of the transducer and that the
SHUNT function is turned OFF.
To calibrate the transducer to the instrument, 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. 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
CLEAr. 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.
7.1.3 C
ALIBRATION
OF
P
RESSURE
T
RANSDUCERS
EQUIPPED
WITH
E
XTERNAL
S
HUNT
R
ESISTORS
Install the external shunt resistor across terminals 13 (signal -) and 14 (Cal 2). Be sure that the full
scale and low scale values (
PI.FSV and PI.LSV) have been set to match the range of the transducer
and that the
SHUNT function is ON and set to the correct percentage (as supplied by the transducer
manufacturer. If the value supplied is a different percentage value, or an actual pressure value,
convert to a percentage and enter in
SHNT.%). (See Section 5.3.1)
To calibrate the transducer to the instrument, press the
FUNC
key until
nonE and GROUP show on
Summary of Contents for ATC770
Page 19: ...ATC770 Microprocessor Based Pressure Process Controller 19 Fig 2 ATC770 Outline Drawing...
Page 23: ......
Page 30: ...30 Fig 6 Remote Set Point Jumper Location Board E...
Page 84: ...NOTES...
Page 85: ...NOTES...
Page 86: ...NOTES...
Page 88: ...DYNISCO INSTRUMENTS 38 FORGE PARKWAY FRANKLIN MA 02038 ATTN MARKETING DEPT Place Stamp Here...