Travel Sensor Adjustment With A Multimeter; Potentiometer Resistance Measurement - Emerson Fisher Fieldvue DVC6030f Instruction Manual

PIN 2
KEYED
TRAVEL SENSOR
CONNECTOR
TYPE DVC6010f,
DVC6020f AND DVC6030f
NOTE:
1 THE POTENTIOMETER RESISTANCE BETWEEN PINS 2 AND 3 CAN
BE MEASURED AT THE CONNECTOR. INSERT TWO SHORT LENGTHS
OF 22 AWG WIRE INTO THE PIN 2 AND 3 RECEPTACLES IN THE
CONNECTOR. CLIP ON LEADS FROM A DVM (DIGITAL VOLTMETER) TO
MEASURE THE RESISTANCE.
A6481/IL
Two methods are available for adjusting the travel
sensor. You can use a multimeter to measure the
potentiometer resistance, or if you have a Field
Communicator, you can use the procedure in the
Calibration section. To use the multimeter, perform
steps 5 through 13. To use the Field Communicator,
skip to step 14.

Travel Sensor Adjustment with a Multimeter

5. Align the feedback arm (key 79) to the housing
(key 1) by inserting the alignment pin (key 46) through
the hole marked "A" on the feedback arm. Fully
engage the alignment pin into the tapped hole in the
side of the housing. Position the feedback arm so that
the surface is flush with the end of the travel sensor
shaft.
6. Connect a multimeter set to a resistance range of
50,000 ohms. Measure the resistance between pins 1
and 3 of the travel sensor connector. Refer to figure
10-6 for pin location. The resistance should be
between 40,000 and 50,000 ohms.
March 2006
PIN 1
PIN 3
1
1
Figure 10-6. Potentiometer Resistance Measurement
TRAVEL SENSOR WIRES,
REMOTE MOUNT FEEDBACK UNITS
(TYPE DVC6015, DVC6025 AND DVC6035)
3
CW
2
7. Multiply the result in step 6 by 0.048 to get a
calculated resistance. The calculated resistance
should be in the range of 1920 to 2400 ohms.
8. Re-range the multimeter to a resistance of 3000
ohms between pins 2 and 3 of the travel sensor
connector. Refer to figure 10-6 for pin location.
9. Adjust the travel sensor shaft to obtain the
calculated resistance determined in step 7, $100
ohms.
Note
In the next step, be sure the feedback
arm surface remains flush with the end
of the travel sensor shaft.
10. While observing the resistance, tighten the screw
(key 80) to secure the feedback arm to the travel
Maintenance
10-11
10