Related Manuals for Comet System W0710
Summary of Contents for Comet System W0710
- Page 1 Calibration manual W0710 W0711 W0741 W3710 W3711 W3721 W3745 W4710 W5714 W7710 Manual for Calibration and Adjustment for WiFi sensors...
- Page 2 © Copyright: COMET SYSTEM, s.r.o. Is prohibited to copy and make any changes in this manual, without explicit agreement of company COMET SYSTEM, s.r.o. All rights reserved. COMET SYSTEM, s.r.o. makes constant development and improvement of their products. Manufacturer reserves the right to make technical changes to the device without previous notice.
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Page 3: Table Of Contents
Table of contents TERMINOLOGY ....................4 CALIBRATION (ACCURACY VERIFICATION) ............ 5 Calibration recommendations ..............5 General calibration conditions ..............5 Preparing the WiFi sensor for calibration ..........7 Calibration procedure ................7 ADJUSTMENT ....................8 WiFi sensor Adjustment Conditions ............8 Adjustment Procedure ................ -
Page 4: Terminology
Terminology Device – In case of this manual is by the device meant WiFi sensor. DUT (Device Under Test) – Device to which is carried out accuracy verification (that means calibration of the device). Standard – Measurement equipment (e.g. thermometer) or reference scale of certain quantity (e.g. -
Page 5: Calibration (Accuracy Verification)
Calibration (accuracy verification) To verify the measurement accuracy (calibration) of temperature, relative humidity, CO concentration and barometric pressure a specific equipment for generating these quantities (calibration chamber) is required. Calibration of the instrument is performed by placing sensing element of WiFi sensor (DUT) and sensing element of standard into calibration chamber. - Page 6 between the calibration chamber and the environment - especially over the cables of standard or DUT. When calibrating the temperature and/or the relative humidity, the airflow in the chamber must be about 0.5 to 1 m/s. It is strongly recommended to insert only the probe to the chamber without body of DUT.
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Page 7: Preparing The Wifi Sensor For Calibration
Preparing the WiFi sensor for calibration Perform an optical check for mechanical or other visible damage. In case of damage, hand over the device for repair. Check if the device is not reporting a weak battery for real-time clock backup. If so, follow recommendation in User manual. -
Page 8: Adjustment
Adjustment Adjustment means action resulting in setting WiFi sensor to the state, when its actual measurement accuracy is identical or better than measurement accuracy specified in instruction manual. Adjustment is possible only for measured values (temperature, relative humidity, CO concentration or pressure). -
Page 9: Adjustment Procedure
Adjustment Procedure For adjustment of WiFi sensors is WifiSensorUtility used. This software can be obtained from technical support on the request. Install WifiSensorUtility software at computer with Windows operating system. Administrator rights for installation of software are required. ... - Page 10 For device with external temperature probes, it is advisable to place only an external probe into the calibration chamber generating the relevant quantity. If the calibration is carried out at different temperature than ambient temperature, a sufficient part of the cable with the probe must be inserted into calibration chamber.
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Page 11: Saving Of The New Adjustment
Saving of the new Adjustment Temperature Adjustment (W0710, W0711, W0741, W3745) Input adjustment can be performed using Service – Device adjustment menu item, however, we do not recommend this way. The device inputs for Pt1000 RTD sensors are very stable. From this reason is not recommended to change calibration constants if the probe does not measure accurately. - Page 12 If correction to cable length is correct, it can be set user calibration: If the WiFi sensor measured 25 °C before this setting, then 26 °C will measure after it. IE-WFS-KAL-WiFi-01...
- Page 13 Temperature/Humidity Adjustment (W3710, W3711, W4710, W3721, W3745, W7710) Important note: The calibration constants are not stored in the instrument itself, but inside the probe. Calibration constants at Digi probe cannot be restored by backup file downloaded from device. Digi probes can be restored into factory defaults only.
- Page 14 Relative humidity adjustment. Enter the measured values of the standard and the device. Click Save new calibration button finally: If the device measured 73.2 %RH before adjustment, then measures 75.3 %RH after it. Important note: Capacitive humidity sensors usually drifts at high humidity and not at low humidity values.
- Page 15 Barometric pressure adjustment (W4710, W7710) select Service – Device adjustment menu item: two-point calibration: select Barometric Pressure channel (1) Click Enter Adjustment (2) Enter standard value for calibration point No. 1 (3) Enter device value for calibration point No. 1 (4) ...
- Page 16 Enter device value for calibration point No. 2 (6) Save new calibration to device (7) CO2 concentration Adjustment (W4710, W5714) select Service – Device adjustment menu item: one-point offset can be used: select CO concentration channel (1) ...
- Page 17 Enter a zero value (3) Enter a zero value (4) Enter standard value for calibration point (5) Enter device value for calibration point (6) Save new calibration to device (7) IE-WFS-KAL-WiFi-01...
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Page 18: Revision History
Revision history Document version Date Note IE-WFS-KAL-WiFi-01 January 2021 Initial document version Note: Page numbers may to differ between document versions. IE-WFS-KAL-WiFi-01...
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