My question is: How we can explain the customer that they will need to change the lamp every one or two years when with the old instrument (CQXE) they changed the lamp after 5 or 6 years and as you know the customer will claim for that and we want to had the correct answer for it.
This customer has a USVIs not a CQXE. They CANNOT expect them to behave the same. The CQXE wavelength resolution was 2.34 nm/pixel, the USVis wavelength resolution is 1.64 nm/pixel a 40% improvement. To achieve this improvement the polytube is larger to accommodate a bigger dual detector array. This requires more light so a larger amount of energy (30% more) is used to flash the lamp, 4.8 Joules compared to 3.75 joules. This causes the lamp life to be decreased.
Question : I have a customer looking for the certificate of traceability for their green tile. Do you have this on file?
The White Tile was supplied with a certificate of traceability for its calibration relative to a perfect reflecting diffuser. The Green tile was supplied with Read at Factory values, and is not a calibrated tile, it is a working reference tile. It's assigned values occurred when the sensor was in a known good state of calibration, its tile values are unique to the instrument that measured it. Light Traps do not require calibration. They are assigned a value of 0.00 at all wavelengths.
The ColorQuestXE and UltraScan Vis share the same sphere, lamp, and collection optics, they differ in the spectrograph size and range, detection and electronics to be compatible with these changes. The UltraScan Vis can detect over the full range of Visible light, 360nm to 780nm compared to the ColorQuest XE which only detected light in the range of 400nm to 700nm, the minimum accepted range to calculate color measurements.
The APHA index was developed by reading a standard test of actual APHA solutions on a ColorQuestXE and UltraScanVis. This was done to insure the two instrument types had very close agreement in how they report APHA. We followed ASTM D5386 recommendation and used the YI E313 index as the basis for our polynomial fit. Each sensor has its own specific fit equation. The EasyMatch QC software determines which equation to use based on which instrument it is currently connected.
We do not have a published specification. If we did it would vary based on the Haze Value. Please note that Haze Standards are usually assigned by either ISO14782 or ASTM D1003 Procedure A compliant instruments. The UltraScanVis is an ASTM D1003 Procedure B compliant instrument. Expect to see greater variance for Haze standards with value 5 and under than for Haze standards with value 10 and higher.
When a sample clamp does not appear to work properly, I would first examine the two components of the Sample Clamp assembly.
1) The Sample Clamp arm and actuator,
2) The Sample Clamp mounting channel.
Sample Clamp Arm- Exercise each button on the sample clamp.
- One button moves the "teeth" that allows the clamp to engage or release from the channel. To test this function, remove sample clamp from channel. Exercise the "in/out" button. If teeth move, the clamp is probably ok.
- The Second button, allows the Sample Clamp arm to swing. If both of these function properly, I would move to the next assembly.
Sample Clamp mounting channel- The channel is mounted to the sensor base plate. To examine the channel, you first need to carefully move the sensor on its side so that you can view the channel. The channel functions to guide and position the Sample Clamp. Within the Sample Clamp channel is a spring loaded detent that catches the teeth of the Sample Clamp and allows the Clamp to lock at the desired position. The detent is the most common point of failure in the channel.
If the Sample Clamp slides freely in the channel and does not lock, check to ensure the detent is present and has not frozen in place or been broken by pulling the Sample Clamp out of the channel without first actuating the Sample Clamp buttons.
Most Sample Clamp repairs can be made by a qualified technician in the field or can be done by returning the Sample Clamp assembly to the factory.
Attached are two poster sessions from the Well Characterized Biological Product 2015 (WCBP 15) Conference in Washington DC, January 2015.
The presentations describe the use of colorimetry in the Pharma industry.