Instruction Manual
D102005X012
846 Transducer
June 2017
18
Standard Performance: Full Range Input, Direct Action
WARNING
Refer to the WARNING at the beginning of the Maintenance section.
Use the following procedure to achieve a standard 0.2 to 1.0 bar (3 to 15 psi) output span for a 4 to 20 mA input signal:
1. Remove the module final assembly from the housing. Refer to Removing the Module Final Assembly in the
Maintenance section for an explanation of how to disengage the module final assembly.
2. Confirm that the unit is direct acting. A green electronic circuit board identifies direct‐acting units. Refer to Action
under the heading Electronic Circuit Board in the Maintenance section for more information on direct acting units.
3. Position the range jumper in the Hi position for High Range. Figure 18 shows the circuit board jumper positions.
4. Replace the module final assembly in the housing. Refer to Replacing the Module Final Assembly in the
Maintenance section for an explanation of how to engage the module final assembly.
5. Connect the air supply to the air supply port.
6. Connect a precision output indicator to the output signal port.
7. Make sure that the output gauge port has an output gauge or a threaded plug installed. A threaded plug is provided
for units shipped without output gauges.
8. Remove the terminal compartment cover.
9. Connect the current source (or voltage source) positive lead (+) to the terminal block positive (+) and the current
source (250‐ohm resistor lead) negative lead (-) to the terminal block negative (-). Refer to figure 9.
CAUTION
Excessive current can damage the transducer. Do not connect an input current of more than 100 mA to the transducer.
10. Apply a 4.0 mA (Vm = 1.0 V) signal, and adjust the zero screw to achieve a 0.2 bar (3.0 psi) output. The output
increases with clockwise rotation of the zero screw.
11. Apply a 20.0 mA (Vm = 5.0 V) signal, and adjust the span screw to achieve a 1.0 bar (15.0 psi) output. The output
increases with clockwise rotation of the span screw.
12. Repeat steps 10 and 11 to verify and complete the calibration.
Multirange Performance: Full Range Input, Direct Action
WARNING
Refer to the WARNING at the beginning of the Maintenance section.
Note
Consult your Emerson sales office
or Local Business Partner for calibration of multirange performance units with split range input.
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