NOSHOK KING-GAGE 5900, Руководство по эксплуатации и калибровке

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page 7
Model 5900 D/P Module EX-1710-1
D/P Range Adjustment DIP Switch Settings
The D/P transmitter span can be adjusted from 70%
to 140% of the nominal range indicated by the model
number. (Refer to Model No. Designation on page 3.) This
is how the transmitter’s pressure range can be changed
for a specific application. When the D/P transmitter is
used with a KING-GAGE
®
digital tank level indicator,
the “Application Datapack” (iButton memory module) is
generally programmed with the nominal range setting. The
indicator programming will correlate the output signal to
tank capacity regardless of whether the maximum tank level
generates less than 20 mA output from the transmitter.
WHEN NOT TO CHANGE SPAN —If a KING-GAGE indicator
is part of the system, you should not have to change the
range (span) of the transmitter.
Coarse Range Setting
An initial coarse range setting is provided by the DIP switches.
Use the previously outlined Zero/Span Calibration to achieve
the final trim setting for precise 4–20 mA output over the
intended pressure range.
The DIP switches on the transmitter circuit board affect
the span (range) of the transmitter. These provide coarse
adjustment in addition to the fine span adjustment of the
potentiometer. Please refer to the individual DIP switch
positions listed for adjusting the existing setting of the
transmitter.
The four (4) switches provide 16 increments of coarse
adjustment. Prior to changing any switch setting, check
the current output of the transmitter at the desired upper
pressure value. Also note the existing switch setting.
1. Apply the desired maximum pressure to the sensing
diaphragm of the D/P transmitter (requires a pressure
test shell available from King Engineering).
2. Record the existing setting positions of the DIP
switches.
3. Adjust the potentiometer to maximum output by
turning clockwise until it “clicks”.
4. To increase the milliamp output, use a higher switch
setting arrangement; to reduce the milliamp output,
use a lower switch setting arrangement. (The goal is
to achieve a output signal value just slightly above
20 milliamps and then use the potentiometer to
trim the setting.)
5. Follow the Zero/Span Calibration procedure to check
both the zero and span output.
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
DIP Switch
Increase
Maximum mA
Output
Minimum mA
Output
Decrease
Increase
Decrease
Increase
Decrease