User manual VAISALA PTB330TS

[. . . ] USER'S GUIDE Vaisala Barometric Pressure Transfer Standard PTB330TS M210983EN-A PUBLISHED BY Vaisala Oyj P. O. Box 26 FI-00421 Helsinki Finland Visit our Internet pages at http://www. vaisala. com/ © Vaisala 2009 No part of this manual may be reproduced in any form or by any means, electronic or mechanical (including photocopying), nor may its contents be communicated to a third party without prior written permission of the copyright holder. Please observe that this manual does not create any legally binding obligations for Vaisala towards the customer or end user. All legally binding commitments and agreements are included exclusively in the applicable supply contract or Conditions of Sale. [. . . ] 6. Position the battery pack in inside the case, replace the back plate, and tighten the screw. Refer to section Charging on page 29. Changing the HMP155 Probe Filter New filters for the HMP155 probe can be ordered from Vaisala; see Options and Accessories on page 85. After removing the filter, check the O-ring and replace it if necessary. 3. 42 ___________________________________________________________________M210983EN-A Chapter 4 ______________________________________________________________ Maintenance 0802-159 Figure 19 where 1 2 3 4 = = = = Filter HMP155 Sensor and Filter Structure O-ring HUMICAP® sensor Pt100 temperature sensor VAISALA _______________________________________________________________________ 43 User's Guide ______________________________________________________________________ Changing the Sensor in the HMP155 If your HMP155 uses the HUMICAP® 180R sensor, you can change it yourself without sending in the probe for service. After changing the sensor, you must calibrate the new sensor using serial line. For instructions on how to change the sensor and calibrate it, refer to the HMP155 User's Guide. It is available for download from www. vaisala. com. CAUTION HUMICAP® 180RC sensors cannot be changed by the user. Calibration and Adjustment The PTB330 and HMP155 are fully calibrated and adjusted as shipped from factory. Calibration must be done always when there is reason to believe that the device is not within the accuracy specifications. When defining the calibration interval the long term specifications and the requirements of the customer must be taken into consideration. It is recommended that calibration and adjustment should be carried out by Vaisala. Using the service port is recommended; see section Connecting to the Serial Line on page 61. The calibration and adjustment procedure, as well as the calibration commands, are described in section Calibration and Adjustment of PTB330 on page 45. The HMP155 can be adjusted using the MI70 indicator, or through the serial port. For instructions on using the serial port, refer to the HMP155 User's Guide. 44 ___________________________________________________________________M210983EN-A Chapter 4 ______________________________________________________________ Maintenance Calibration and Adjustment of PTB330 In PTB330, the raw measured pressure value of each barometer module is first corrected using the corresponding multipoint adjustment values. The additional linear adjustment (if enabled) is applied to the corrected values. This allows the user to fine-tune the pressure reading using the linear adjustment without performing a complete readjustment for the barometer module, see Figure 20 on page 45. 0708-053 Figure 20 PTB330 Adjustments To measure new adjustment values and perform the actual adjustment, first disable the corresponding adjustment on each barometer module you are going to adjust (see the procedure above). If you are going to perform a multipoint adjustment, disable also the linear adjustments. If you are going to do only a linear adjustment, leave the multipoint adjustments untouched. After disabling the previous adjustments, calibrate the PTB330 against your pressure reference. Make a note of the pressure reading of each PTB330 barometer module separately (quantities P1, P2, and P3). Then use the display/keypad to enter and activate the new multipoint/linear adjustment factors. NOTE Making adjustments is possible only after adjustments have been unlocked. To unlock the adjustment menu, press the ADJ button on the motherboard of the transmitter. The user can select a simple offset or a two-point offset and gain adjustment and use the LCP command for adjustment of the barometer module. [. . . ] Example: >echo off Echo : OFF send pressure = 1013. 00 hPa echo on Echo : ON > 76 ___________________________________________________________________M210983EN-A Chapter 6 ______________________________ Serial Line Communication With PTB330 Barometer Other Commands ? Use the serial line command ?info : Date : Time : Start mode : Baud P D S : Output interval: Address : Echo : Module 1 : Module 2 : Module 3 : Module 4 : > D5050002 D4120001 P #R #N 2008-12-12 Vaisala/HEL 2000-01-01 00:00:24 TS 19200 N 8 1 1s 0 ON EMPTY BARO-1 EMPTY EMPTY ERRS Use the command ERRS to display all unacknowledged errors (and clear them). If an error is still active, it will be displayed again with the ERRS command. Example: >errs PASS No errors > VAISALA _______________________________________________________________________ 77 User's Guide ______________________________________________________________________ RESET Use the RESET command to reset the barometer. [. . . ]