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Marine gravitymeter, S-99

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June 07, 2024, at 11:36 AM
Version: pmwiki-2.3.38

S-99 POWER SUPPLY REPAIR


INTRODUCTION


OLD POWER SUPPLY THAT MUST BE REPLACED


Replacements required for these obsolete Power supply units:

Terminal outputs on GPC225 Power supply. From datasheet (PDF).

  • CONDOR mod GPC225-28 -- 28 Vdc
  • CONDOR mod GPC225-24 -- 24 Vdc
  • Datasheet -- Local copy

REPLACEMENT POWER SUPPLY, RECOMMENDED BY ZLS


Click to enlarge.
  • TDK-Lambda mod GWS250-24
    • Input: 85-264Vac max 3.3A
    • Output 24Vdc, max 10.5A
    • Adjust range: 22 - 28.8V
    • Ripple noise: 150mV
    • Efficiency typ, 230Vac input: 92%
  • Data sheet: PDF - Also local copy
  • Instruction manual: PDF - Also local copy (PDF)
  • Supplier: RS p/n: 747-0881

CHECK AFTER REPLACEMENT


POWER CABLE WIRING -- L&R Update with GyroPack/FogPack -- ZLS_018 (Rev 1-5) -- From manual p. 50

  • Measure on 25 pin D-SUB F-connector on front panel.
  • Pin 4: +24Vdc to sensor heater & cheater motor: Measure 0 ohm to power supply output.
  • Pin 5: +28Vdc to Gyro: This signal is switched ON/OFF so you cannot measure resistance to 28Vdc output on power supply.
  • Pin 6: -28Vdc: Measure 0 ohm to power supply output.

MISC


Replacement Power supply alternatives


MUST BE EVALUATED: Perhaps these PS-modules can replace the old Condor 24 and 28 Vdc power supplies: TRACO POwer TPI 300-M series, 300 W (PDF)

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Page last modified on June 20, 2025, at 01:25 PM
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