Reference Manual
00809-0100-4022, Rev AA
July 2002
Model 4600
3-8
Rerange with a HART Communicator Only
The easiest and most popular way to rerange is to use the HART
Communicator only. This method changes the values of the analog 4 and 20
mA points independently without a pressure input.
From the
HOME
screen, enter the fast key sequence shown.
1. At “Keypad Input” select 1 and use the keypad to enter lower range
value.
2. From “Keypad Input” select 2 and use the key pad to enter upper range
value.
Rerange with a Pressure Input Source
and HART Communicator
Reranging using the HART Communicator and a pressure source or process
pressure is a way of reranging the transmitter when specific 4 and 20 mA
points are unknown.
NOTE
The span is maintained when the 4 mA point is set. The span changes when
the 20 mA point is set. If the lower range point is set to a value that causes the
upper range point to exceed the sensor limit, the upper range point is
automatically set to the sensor limit, and the span is adjusted accordingly.
1. From the
HOME
screen, enter the fast key sequence shown to configure
lower and upper range values and follow the on-line instructions.
Rerange with a Pressure Input Source and the
Local Zero and Span Targets (option D1)
1.
For Zero based lower range values (gauge only):
Vent the transmitter.
For Non-Zero based lower range values:
Using a pressure source with an accuracy 3 to 10 times the desired
calibrated accuracy, apply a pressure equivalent to the lower range
value to the transmitter.
2. Using the supplied magnetic adjustment tool, touch and hold the
magnetic end to the zero adjustment target for at least two seconds, but
no longer than ten seconds.
3. Using a pressure source with an accuracy 3 to 10 times the desired
calibrated accuracy, apply a pressure equivalent to the upper range
value to the transmitter.
4. Using the supplied magnetic adjustment tool, touch and hold the
magnetic end to the span adjustment target for at least two seconds, but
no longer than ten seconds.
Fast Keys
1, 2, 3, 1, 1
Fast Keys
1, 2, 3, 1, 2
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