MBW 973-SF6 User manual

SF6Analyzer 973
Operation Manual
Version 973-SF6
V3.1
MBW Calibration Ltd.
Seminarstrasse 57
CH-5430 Wettingen / Switzerland
[phone] Phone
[phone] Fax
[e-mail]
www.mbw.ch

MBW973-SF6_MANUAL_E_V3.1 i
Table of Contents
TABLE OF CONTENTS ......................................................................................I
GENERAL ..........................................................................................................1
SHORT DESCRIPTION......................................................................................3
OPERATION.......................................................................................................5
Front Panel without SO2Option................................................................................................. 5
Front Panel with SO2Option...................................................................................................... 5
Back Panel without SO2Option ................................................................................................. 8
Back Panel with SO2Option ...................................................................................................... 8
INITIAL SETUP ................................................................................................11
Preparation............................................................................................................................... 11
Electrical Connection ............................................................................................................... 11
Connection of the Serial Interface............................................................................................ 11
SF6Gas Connection ................................................................................................................ 12
Evacuate the Sampling Tube................................................................................................... 13
Evacuate the Internal Cylinder................................................................................................. 14
SF6Gas Connection to the Compartment ............................................................................... 15
MEASUREMENT OPTIONS.............................................................................17
Navigating the Menus .............................................................................................................. 17
MEASUREMENT..............................................................................................19
Measurement without SO2Option ........................................................................................... 19
Termination of Measurement................................................................................................... 20
Measurement with SO2Option................................................................................................. 21
Termination of Measurement................................................................................................... 22
Measuring Range Limitations .................................................................................................. 23
Alarm Messages ...................................................................................................................... 23
Measurement Aborted ............................................................................................................. 24
Measurement of Air or Nitrogen (N2) ....................................................................................... 24
DATA COLLECTION IN EXCEL......................................................................25
RS-232 – USB Converter Installation ...................................................................................... 25
Data Collection over RS-232 with the Excel Protocol.............................................................. 26
SO2MODULE...................................................................................................29
Replacement of SO2Measurement Cell.................................................................................. 29
Activation of SO2Measurement............................................................................................... 30

ii MBW973-SF6_MANUAL_E_V3.1
TEST FUNCTIONS...........................................................................................31
Ice Test .................................................................................................................................... 31
ADDITIONAL SETTINGS.................................................................................35
Selection of Languages ........................................................................................................... 35
Selection of the indicated Parameters..................................................................................... 36
Selection of Units..................................................................................................................... 37
Changing Color........................................................................................................................ 38
Storage of the Actual Settings ................................................................................................. 39
Restore Color Settings and Baud Rate.................................................................................... 40
MAINTENANCE ...............................................................................................41
Touch Screen Calibration ........................................................................................................ 41
Mirror Cleaning......................................................................................................................... 42
Exterior Cleaning...................................................................................................................... 43
SPECIFICATIONS............................................................................................45

MBW973-SF6_MANUAL_E_V3.1 1
General
This manual explains the function of the 973-SF6Analyzerwith and without the SO2option.
Throughout this manual the instrument will be called 973.
This manual refers to instrument software versions 110525a and higher.
Should the 973 be used in any other way than that described in this
user’s manual, or outside the limits described, the built-in safety pro-
tection of the instrument may be compromised.
Vol SF6 %
All descriptions in
bold
italic
are related to the text on the front panel,
the display and the back panel of the 973.
If you wish to use the instrument as quickly as possible, we recommend reading the chapters
Initial Setup (page 11) and Measurement (page 19). Standard use of the instrument is ex-
plained in these two chapters.

2 MBW973-SF6_MANUAL_E_V3.1

MBW973-SF6_MANUAL_E_V3.1 3
Short Description
Reliable Measurements in SF6
The 973 was specifically designed for measurement of humidity, SF6purity and SO2concentra-
tion in gas insulated switchgear systems. Humidity measurement data is displayed in ppmv,
ppmwand Frost/Dew Point at either gas compartment pressure or standard pressure. SF6purity
measurement is displayed directly in % Volume SF6. Both the humidity and purity measure-
ments utilize accurate and reliable condensation techniques. SO2 concentration is measured
with an electrochemical cell with results displayed in ppmv.
Gas Recovery and Pressure Measurement
The 973 is equipped with a gas recovery system that stores the sampled gas during the meas-
urement process in its internal storage cylinder. After completion of the measurement, the
stored gas is pumped back into the original compartment or into another vessel. The compart-
ment pressure is also measured.
Easy, Automated Measurement
The 973 is equipped with a user configurable full color active matrix LCD with integrated touch
screen. The 973 may be configured for measurement of Humidity and % Volume SF6with either
automatic or manually initiated Pump Back. Using the bi-directional RS-232 communications
port, all measurement data may be easily transferred to a computer.
Calibration
Users can easily check the 973 calibration at any time using the built-in Ice Test function,
providing instant verification of system accuracy and integrity.
LCD Display with Touch Panel
The 973 utilizes a full color active matrix liquid crystal display with an integral touch panel. It has
a high contrast ratio and a wide viewing angle for easy readability. Data is displayed in large,
easy to read fonts. Using the on screen function and menu keys, you can easily configure each
line of the display and navigate the menus.
Versions equipped with the SO2option will have alternative display and data line formats.
Please refer to page 21 for further information on the measurement of SO2concentration.
Connect and Go
The system is supplied ready for immediate use.
973-SF6with Standard Accessories
•Transport Case
•6 m Stainless Steel armored PTFE tubing
•SF6coupling DN20 and DN8
•3 m RS-232 cable incl. USB adapter with USB cable
•2.5 m power cable
•Operation Manual
•CD-ROM

4 MBW973-SF6_MANUAL_E_V3.1

MBW973-SF6_MANUAL_E_V3.1 5
Operation
Front Panel without SO2Option
Front Panel with SO2Option
Status of Measurement
Measuring Head
Keypad
Menu Keys
Internal
Cylinder Capacity
Fixed Function Keys
Touch Screen
Data Lines

6 MBW973-SF6_MANUAL_E_V3.1
Data Lines
The first four lines of the display are for numeric representation of the measured data. We refer
to those first four lines as Data Lines. Numeric data lines contain the value to the left, with the
parameter description and units to the right. The displayed parameters and units can be
changed, but after a restart of the instrument, the values will be reset to the stored standard
configuration.
Data Line 1
This line displays the measured Dew/Frost Point.
The unit is °C at atmospheric pressure.
In the standard configuration, instruments equipped
with the SO2option show the SO2concentration
expressed in ppmv. The standard SO2configuration
is shown on the second display.
Data Line 2
This line displays the humidity content in either
ppmv(parts per million by volume) or ppmw(parts
per million by weight). Both units are pressure inde-
pendent.
Data Line 3
This line displays the purity in % Volume SF6.
Data Line 4
This line indicates the current pressure of the gas
compartment. The unit is kilo Pascal absolute pres-
sure.
The data lines indicating the measured humidity and SO2concentrations as well as
the % Volume SF6will only be displayed after completion of the measurement. Dur-
ing the measurement only the current gas pressure of the measured compartment
is indicated.
Fixed Function Keys and Status Line
Without SO2Option
With SO2Option
The bottom line of the display contains two fixed
function keys. The measurement process is started
by pressing the Start button. With the Pump button,
pump back of stored gas in the internal cylinder can
be activated manually. These function keys are not
changeable and are always available. Additionally
this line contains the status indication, which indi-
cates the current operation mode. The level indica-
tor of the internal cylinder indicates the current stor-
age capacity. A 973 without the SO2option will dis-
play an Xnext to SO2to indicate that the meas-
urement of SO2concentration is not available.