Control Parameters; Calibration Correction; Figure 10 Extracts From Calibration Certifi Cates - Michell Instruments Optidew User Manual

Optidew Series User's Manual
3.4.7

Control Parameters

3.4.8

Calibration Correction

Every Optidew is delivered with a Calibration Certifi cate detailing the deviation at each
measurement point from a known reference value. Data provided on the Calibration
Certifi cate is normally arranged as shown in the following extracts:
Extract from a UKAS Calibration Certifi cate:
Generated
Dew point
°C
-39.89
-20.10
0.39
Extract from a Standard Calibration Certifi cate:
From time to time the Optidew may be calibrated by an external calibration agency,
where similar data will be provided.
Michell Instruments
The control parameters (protected by a password) should only
be amended by trained personnel in order to adjust the system
for operation in extreme conditions.
Contact a Michell Technical Representative for details
(see contact information at www.michell.com).
Dew-point
Temperature Temperature
°C
-40.11
-20.31
0.20
Generated
Dew point
°C
-40.1
-20.1
0.2
Extracts from Calibration Certifi cates
Figure 10
Test Hygrometer
Sensor Correction
Required
°C °C
-20 +0.22
0 +0.21
21 +0.19
Instrument
Display °C
-40.2
-20.1
0.1
OPERATION
Expanded
Uncertainty
°C
±0.26
±0.22
±0.18
23