Repair, Modification &
Calibration Services
Dosimeter Modification
Keithley 602 modifications include:
- The installation 150/300V electronic bias supply with reversible polarity.
- Replacement of the analog meter with a 4.5 digit LCD.
- Installation of a single 12V rechargeable battery with a wall-mount UL-listed transformer/charger.
- Installation of circuitry to allow bias voltage and battery condition to be read on the display.
Similarly, CNMC can modify and improve your other dosimeters, which includes replacing bias batteries with ±300V, ±150V electronic bias supply and converting the input connector to BNC or TNC.
Dosimeter Repair
CNMC can generally repair and significantly improve your dosimeter/electrometer regardless of its manufacturer. Repairs at ½ the cost and/or ½ the time are common at CNMC.
Ion Chamber Modification
Includes thimble, waterproof, plane-parallel, extrapolation and diode detectors of any manufacturer. Modifications include:
- Conversion of any style of connector.
- Shortening the cable.
- Farmer thimble (non-waterproof) conversion from 0.6cc to 0.2cc, to acrylic, graphite or Solid Water™ chambers.
Ion Chamber Repair
Same day repairs are possible at CNMC; typical chamber repairs include:
- Thimble replacement (non-waterproof types).
- Connector repair or replacement.
- Correcting leakage condition.
- Resheathing waterproof ion chambers.
Triaxial/Coaxial Cable Repair & Modification
CNMC manufactures low-noise triaxial and coaxial cables per your specifications with connectors of your choice and custom lengths. CNMC will repair and modify your extension cable. Repair and modification includes:
- Connector repair or replacement.
- Conversion of any style of connector (BNC, TNC, PET, PTW, MDH, etc.).
- Installation in a wind-up reel.
AAPM ADCL Calibration
When scheduled through CNMC, we will thoroughly inspect dosimeter and ionization chamber and report on conditions requiring attention.