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.
9.06
LVDT Testing and Replacement
The following explains how to test and replace a LVDT(s). First stop the conveyor and
disconnect power from the WP20. Then remove the side cover on the scale carriage to allow
access to the SC400 signal conditioner (SC). Next, disconnect the green connector from the SC
that the LVDT wires are connected to. If more than one LVDT is connected to the green
connector, to get an accurate reading, the wires of the LVDT to be tested must be removed from
the connector. Then, using an ohmmeter, verify the following resistance values. If even one
resistance value varies by more than +/- 20 %, replace that LVDT.
ORG - YEL = 70
Ω
GRN - BLK = 100
Ω
BLU - RED = 100
Ω
If replacement of a defective LVDT is necessary, use the following instructions. Refer to the
following figure. First remove the LVDT wiring from the green connector. Then remove the two
bolts from the LVDT clamp. Next, remove the LVDT assembly from the carriage. Now loosen
the clamp screw and slide the LVDT out of the clamp. Install the new LVDT in approximately
the same position, and assemble in reverse order. Re-wire it to the green connector, being careful
to keep the wiring away from the deflection arm. The new LVDT(s) must be aligned (Section
7.02) and the scale re-calibrated (Section 7.03) after a LVDT has been replaced.
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Страница 10: ... 9 2 09 I O Quick Reference Guide ...
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Страница 24: ... 23 4 03 WY15 and WY25 Scale Wiring load cells ...
Страница 25: ... 24 4 04 HY15 and HY25 Field Wiring ...
Страница 26: ... 25 4 05 WY10 WY10HD and WY20 Scale Wiring LVDTs ...
Страница 27: ... 26 4 06 Chart Recorder Data Logger using the 4 20 ma output ...
Страница 28: ... 27 4 07 Chart Recorder Data Logger using the HFR output ...
Страница 29: ... 28 4 08 Remote Rate Total Display 4 09 Remote Tons Counter ...
Страница 30: ... 29 4 10 Radio Transceivers Local Scale Remote Processor ...
Страница 31: ... 30 4 11 Radio Transceivers Local Processor Remote PLC PC or Remote Display ...
Страница 32: ... 31 4 12 Radio Transceivers Local DC Generator Remote Processor ...
Страница 33: ... 32 4 13 Radio Transceivers Local DC Generator and Processor ...
Страница 34: ... 33 4 14 Multiple Processors to Tecweigh Multi Scale Display MSD ...
Страница 35: ... 34 4 15 Interposing Relay External 120 vac Power 4 16 Interposing Relay Internal 30 vdc Power ...
Страница 61: ... 60 SC300 PCB WY15 and WY25 SC400 PCB WY10 and WY20 ...
Страница 71: ... 70 10 01 WY10 Dimensions CHAPTER 10 DIMENSIONS ...
Страница 72: ... 71 10 02 WY10 HD Heavy Duty Dimensions ...
Страница 73: ... 72 10 03 WY15 Dimensions ...
Страница 74: ... 73 10 04 WY20 Dimensions ...
Страница 75: ... 74 10 05 WY25 Dimensions ...
Страница 76: ... 75 10 06 HY15 and 25 Dimensions ...