Varian Cary 50
Varian · Model Cary 50
Software and Interconnect cable are included The maximum scan rate is 24,000 nm per minute Can scan the whole wavelength range of 190-1100 nm in less than 3 seconds Measure samples up to 3 Abs so users won't have to dilute them as often The Xenon lamp flashes only when acquiring a data point, unlike a diode array which exposes the sample to the whole wavelength range with each reading, causing degradation of photosensitive samples As the Xenon lamp is very intense, the Cary 50 can use a beam splitter without the loss in energy causing excessive photometric noise The beam splitter allows simultaneous reference beam correction, so peaks will not shift as the scan speed changes The Cary 50's super-concentrated beam makes it ideal for fibre optic work The light beam is narrow and very intense, so even if users are using microcells they will still get excellent noise performance The Cary 50 is unaffected by room light Users can operate with the same compartment open or closed.
Typical Failure Modes
Compiled for this model from its own documentation and established engineering knowledge for this equipment class - not from a verified service record. Confirm against the manufacturer's service manual.
Low lamp energy / high photometric noise
HighSymptoms: Noisy baseline, low energy warning, poor signal-to-noise.
Root cause: Xenon flash lamp at end of life.
Baseline / photometric drift
MediumSymptoms: Baseline will not flatten, absorbance offset, peaks shift.
Root cause: Contaminated sample-compartment optics or beam splitter, or a dirty/again cuvette holder.
Will not initialise / no PC communication
MediumSymptoms: Cary WinUV will not connect or control the instrument.
Root cause: USB/serial interconnect cable, port, or driver.
Wavelength accuracy off
MediumSymptoms: Holmium or known-peak check fails, wrong peak positions.
Root cause: Monochromator wavelength drive calibration.
Serviceable Parts & Consumables
Serviceable items for this model, compiled from its documentation and engineering knowledge for this equipment class. Service class and relative cost are estimates, not manufacturer figures; no part numbers are given. Confirm intervals and pricing against the manufacturer.
Xenon flash lamp
Class Periodic replacementRel. cost $$$R&R Moderate
Sample-compartment optics / beam splitter
Class Major service partRel. cost $$R&R Moderate
Interconnect / communication cable
Class Periodic replacementRel. cost $R&R Easy
Cuvette holder
Class Major service partRel. cost $R&R Easy
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Xenon flash lamp | Periodic replacement | $$$ | Moderate |
| Sample-compartment optics / beam splitter | Major service part | $$ | Moderate |
| Interconnect / communication cable | Periodic replacement | $ | Easy |
| Cuvette holder | Major service part | $ | Easy |
Relative cost: $ lowest · $$$$ highest service-part cost for this equipment class. Not a price.
Troubleshooting Approach
A starting sequence for this model, compiled from its documentation and engineering knowledge for this equipment class. Follow the manufacturer's service documentation for the actual procedure.
Symptom: Noisy baseline / low energy
- Run the instrument performance test in Cary WinUV.
- Check for a low-energy or lamp warning.
- Replace the xenon flash lamp if energy is low.
- Clean the sample-compartment optics.
- Re-run the performance test.
Symptom: Software will not connect
- Confirm the interconnect cable is seated at both ends.
- Check the PC port and driver.
- Try another cable / port.
- Reinstall the Cary WinUV software if needed.
- Re-test communication and instrument control.
Documents & Manuals
Related calculators
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