Bellingham + Stanley do not supply any materials for zero calibration.
Bellingham + Stanley offer a choice of Quartz Control Plates (QCP) for verifying and calibrating polarimeters. QCPs are made to the highest standard and are supplied with a Certificate of Conformity showing values at sodium and NIR for both angular and sugar scales.
In addition, QCPs may be supplied with an optional Certificate of Calibration, showing traceability to PTB.
When used with an ADP polarimeter manufactured by Bellingham + Stanley, a thermal block may be used to provide mechanical contact to the instrument’s external temperature sensor, allowing the use of quartz temperature compensation for added accuracy.
|Order Code||Nominal Value||Description|
|34-20||+100 °Z||+34.6 °A||Standard Quartz Control Plate supplied in soft protective cover, Certificate of Conformity showing optical rotation in ° A & °Z for sodium and NIR wavelengths (only) and packed in a rigid case for transit and storage.|
|34-21||+15 °Z||+5.2 °A|
|34-241||Thermal Block for use with ADP/S|
|Uncertainty (new plates): ±0.017 °Z and ±0.006 °A|
Quartz Control Plates may be supplied from new with a traceable certificate, as an optional service. Additionally, as part of GLP, it is often required to have existing Quartz Control Plates recalibrated at regular intervals.
Bellingham + Stanley, a UKAS accredited Calibration Laboratory number 0834, offer a certification service whereby Quartz Control Plates may be issued with a UKAS Certificate of Calibration at sodium (589.44nm) wavelength and additionally at any other wavelength specified by the customer between 546-900nm, with traceability shown to ICUMSA and PTB. Plates outside of the ranges below may also be certified within the UKAS laboratory to an uncertainty of ±0.05 °Z (±0.017 °A)
|1||13 to 17 °Z||4.5 to 5.9 °A|
|2||95 to 105 °Z||32.9 to 36.4 °A|
|3||-26 to -34 °Z||-9.0 to -11.8 °A|
Ranges 1-3: Uncertainty: ±0.017 °Z
and ±0.006 °A
|90-803||Calibration, quartz control plate at 20.0 °C & 589.44nm.|
|90-805||UKAS Certificate of Calibration for
Quartz Control Plate at 20.0 °C
Any additional specified wavelength 546-900nm other than 589.44nm, per unit (i.e. each wavelength specified).
Must be ordered in addition to Certificate of Calibration at sodium wavelength (589nm – Code 90-803)
Best Measurement Capability (Uncertainty):
The reported expanded uncertainty of measurement is stated as the standard uncertainty of measurement in units of °Z multiplied by the coverage factor k = 2, which for a normal distribution corresponds to a coverage probability of approximately 95%. The standard uncertainty of measurement has been determined in accordance with publication EA-4/02.