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CALIBRATION
6
CALIBRATION
6.1
Traceability
The calibration of this instrument is traceable to national standards. For this reason
the instrument can only be calibrated in an accredited e.g. NIST or UKAS accredited,
standards laboratory.
If these facilities do not exist, the instrument must be returned to the manufacturer,
Kahn Instruments, or one of their approved agents.
The
DCC
function can be disabled for calibration purposes (refer to Section 3.2.1).
A calibration certificate bearing a four point calibration is issued with each instrument. If
required, an option is available to add further specific calibration points. Contact Kahn
Instruments for further information (see www.michell.com for contact details).
34
CERTIFICATE OF CALIBRATION
The under-mentioned item has been calibrated at the following points in the Michell Instruments' Humidity Calibration
Laboratory against Test Equipment traceable to the NATIONAL PHYSICAL LABORATORY, Middlesex, United Kingdom and to
the NATIONAL INSTITUTE OF STANDARDS & TECHNOLOGY, Gaithersburg, Maryland, USA.
Certificate Number
52045
Test Date
21 Dec 2011
Instrument Serial Number 131154
Product Type
S8000 Remote
Generated Dewpoint
-20.1
1.0
18.9
38.4
Remote PRT 131155 read 19.25°C at a temperature of 19.33°C
Comments:
NOTE
Traceability to National Physical Laboratory is over the range -90°C to +90°C.
Traceability to National Institute of Standards and Technology is over the range -75°C to +20°C
Uncertainty of measurement:
+/- 0.20 @ +20°C DP increasing linearly to +/- 0.40 @ -60°C DP then rising linearly to +/- 0.63 @ -75°C DP
+/- 0.31 between +20°C DP and +82°C DP
The uncertainty is based on a standard uncertainty multiplied by a coverage factor k=2, providing a level of confidence of approximately 95 %
Approved Signatory
Figure 27
Optisure Remote User's Manual
Ack Number
A26606
Test Equipment
Q0332/Q0238/Q0354/Q0383
Sensor Serial Number
131047
C
Instrument Display
C
-20.0
1.1
18.8
38.4
Michell Instruments Ltd.
www.michell.com
Typical Calibration Certificate
22 Dec 2011
March 2018
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