|
Home Page |
|
|
|
|
Home Page |
|
|
|
|
|
Excellent
Re-calibration Service We offer an excellent recalibration service for all CTG Ltd products and recommend that instruments are calibrated by us on a regular basis to ensure optimum performance. We can guarantee fast turn round times and competitive prices. Calibration Facility Chelsea Technologies Group Ltd has an extensive state of the art calibration facility in Surrey, UK. This facility is ISO9001 accredited and provides calibration for conductivity, temperature, pressure and acoustic measuring instrumentation. Calibrations can be provided through the range according to the International Temperature Scale 1990 (ITS90) and, or IPTS68.
Please
click
below for |
Eleanor Jones, Calibration Manager |
|
|
A 50 litre capacity temperature controlled bath has been installed, with a working volume of 550x300x250 mm. This has a stability of better than 1mK over the temperature range -1o to 65oC. The temperature of the fluid is independently measured with a platinum resistance thermometer with 0.2mK resolution and 1mK accuracy. Routinely, calibrations are performed in the range 2.5 to 29.5oC, but work outside this range can be undertaken to special order. Reporting can be either on the ITS-90 or IPTS-68 scale.
Reporting can be in any pressure units (corrected to standard atmospheric pressure) or depth units corrected to a given latitude, temperature and salinity.
Reporting can be either in conductivity ratio or electrical conductivity units (assuming a conductivity of 4.2914 S/m for standard sea-water at 15o).
Standard calibrations of fluorimeters can be undertaken using chlorophyll-a in acetone, Rhodamine in water, carbazole in water (for hydrocarbon fluorimeters) or perylene in ethanol (for Gelbstoffe fluorimeters) in the range 0.0001 to 100µg/l concentration. Measurements using other fluorophors, solvents and concentrations can be undertaken to special order. Nephelometers can also be calibrated to BS6068.
|
||||
|
|
|||||
|
Chelsea
Technologies Group Ltd |
Two
new dead weight testers (pressure balances) have been installed. One is a
pneumatic instrument covering the range 0.1 to 7MPa absolute (0 to 700m depth),
with a measurement uncertainty of 0.0035% of reading, plus 0.1kPa (1mBar). The
second is a hydraulic unit covering the range 0.3 to 60MPa gauge (30 to 6000m
depth), with a measurement uncertainty of 0.01% of reading.
Five
new 400 litre capacity baths, each with continuous filtration, have been
installed for conductivity calibration in the range 0 to 5 Siemens per metre.
The salinity of each is determined at the time of calibration by comparison to
IAPSO standard sea-water with an autosalinometer.
