TESTO 6651 Instruction Manual
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TESTO 6651 Instruction Manual

Ethernet humidity transmitters, probes
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testo 6651 Ethernet · Humidity transmitters
testo 6600 · Probes
P2A software · Parameterizing, adjusting and analyzing
software
Instruction manual Volume 1
en
Testo-Direct
nfo@Testo-Direct.com
1.888.610.766
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.com

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  • Page 1 6651 Ethernet · Humidity transmitters testo 6600 · Probes P2A software · Parameterizing, adjusting and analyzing software Instruction manual Volume 1 Testo-Direct nfo@Testo-Direct.com 1.888.610.766 www. .com...
  • Page 2 Protecting the environment Send the product back to Testo at the end of its useful life. We will ► ensure that it is disposed of in an environmentally friendly manner.

  • Page 3: About This Document

    Administrator rights are required to install the program under ® Windows 2000, XP and Vista.  Aim of action, e.g.:  Assembling the instrument at the process connection: Requirement that must be met, e.g.:   USB drivers are installed. Testo-Direct nfo@Testo-Direct.com 1.888.610.766 www. .com...
  • Page 4 A step is not numbered if there are no further steps or if the  step is optional, e.g.: ▪ Insert probe connector into socket of testo 6651 until it engages. " ... " Example entries are in inverted commas, e.g.: The value "0"...

  • Page 5: Table Of Contents

    Key cover ..................60 1.4.3 Password protection ..............61 1.4.4 Structure of user menu .............62 1.4.5 Overview of the testo 6651 user menu ...........63 1.4.6 The individual main menus ............65 1.5 Status, warning and error messages............. 76 1.5.1 Transmitter status messages............76 1.5.2 Transmitter warning messages..........77...

  • Page 6: Contents

    6 Contents 1.6 Maintenance and cleaning..............82 1.6.1 Maintaining the instrument............82 1.6.2 Cleaning the instrument............82 Testo-Direct nfo@Testo-Direct.com 1.888.610.766 www. .com...

  • Page 7: Transmitter

    Ethernet. Furthermore, it is possible to issue an alarm for those responsible for the process, if necessary. 1.1.2 Scope of delivery The scope of delivery of the testo 6651 humidity transmitter includes the following: Key cover ...

  • Page 8: Accessories

    6651 - 1.1 Specifications 1.1.3 Accessories The following accessories are available for the testo 6651 humidity transmitter: Protection caps for probes  Mains unit  P2A software (parameterizing, adjusting and analyzing software)  Assembly accessories.  Information about accessories and their order numbers can be found in volume 2, chapter 4.2, page 149 or on the...
  • Page 9 6651 - 1.1 Specifications 9 Display Directives, standards and tests 2-line LCD with plain text line EC Directive: 2004/108/EC (optional) DIN 14644-4 Housing operating temperature EN 61000-6-2 interference - 40 ... 70 °C/-40 to +158 °F, with immunity display from 0 - 50 °C / 32 to EN 61000-6-3 interference +122 °F...

  • Page 10: Dimensions

    6651 - 1.1 Specifications 1.1.5 Dimensions Dimensions in mm With M 20 cable couplings With NPT cable couplings With M plug-in connections Testo-Direct nfo@Testo-Direct.com 1.888.610.766 www. .com...

  • Page 11: Product Description

    R 3 and R 4 Earthing/PE connection 10 M 20 x 1.5 screw connection*, e.g. relay R 1 and R 2 11 Probe connector (testo 6600) 12 Upper part of housing Alternatively, NPT cable couplings or M plug-in...

  • Page 12: Usable Probes

    Hole for fastening to rear panel bracket (M3 x 6 screw) Plastic bracket for assembly on rear panel 1.2.2 Usable probes The testo 6651 humidity transmitter can be used with the following probes: probe Article no. Characteristic testo 6601 0555 6600-L01 Wall probe version;...

  • Page 13: Display And Keypad

    6651 - 1.2 Product description 13 1.2.3 Display and keypad The display option allows the testo 6651 humidity transmitter to be operated via the display and four keys. The LCD display consists of two 7-segment lines for displaying readings and units and of an information line (for status messages, for example).

  • Page 14: Parameters

    6651 - 1.2 Product description The relay option and the background lighting of the optional display are only possible in 4-wire operation. 1.2.7 Parameters The following parameters are calculated: Relative humidity in % RH and (technical)  Relative humidity in % WMO* (calculation according to the WMO ...
  • Page 15 6651 - 1.2 Product description 15 The transmitter even retains its scaling with the voltage disconnected. Measuring range, see table (below). The maximum settings for the manual scaling - the values are not expressly given in the table. The maximum limits can be calculated as follows: X = difference between MIN.

  • Page 16: Alarm Handling

    The testo 6651 monitors limit values using relays. If a reading is outside the limit values, a relay to be specified by the user is switched.

  • Page 17: Commissioning

    1.3.1 Insert Ethernet module (Order no. 0554 6656) The Ethernet module can be ordered retroactively as an accessory. It can easily be installed in the testo 6651 humidity transmitter.  The probe connector must be disconnected. Loosen screw connection (1) of service flap and open the flap.
  • Page 18 6651 - 1.3 Commissioning Place Ethernet module (A) on lower part of instrument (4). If necessary, manually set the address using the rotary encoder switches (see chapter 1.3.3.5, page 31 before fixing the instrument in place. Set on upper part of instrument (5) and fix in place using housing screws (2).

  • Page 19: Assembling The Instrument

    - 1.3 Commissioning 19 1.3.2 Assembling the instrument 1.3.2.1 Wall mounting (for testo 6601/6604/6605 probes)  Attaching rear panel bracket Remove locking screw (item (4) of drawing on page 20) and detach rear panel bracket from plastic bracket (item (2) of drawing on page 20).
  • Page 20 6651 - 1.3 Commissioning  Fastening instrument to rear panel bracket Slide plastic bracket (2) on the back of instrument onto rear panel bracket until it engages (see arrows). Insert screw (4) through hole (3) and screw into rear panel bracket.
  • Page 21 1.3.2.2 Duct mounting (for testo 6602/6603 probes) Hold wall/duct bracket (order no. 0554 6651) (6) against duct wall (8) and mark drill holes for wall/duct bracket and probe shaft. Drill a hole ( 12.5 mm) in the duct wall to feed through the probe shaft.

  • Page 22: Connecting The Instrument

    6651 - 1.3 Commissioning Take the weight of the transmitter into account. Ensure that the brackets (4, 6) are fastened securely. Insert screw (1) through hole on the top of the instrument and screw into bracket (3). Insert probe connector (12) into socket until it engages.
  • Page 23 6651 - 1.3 Commissioning 23 Loosen and remove housing screws (2). Important. The Ethernet module (A) is already separated from the upper and lower parts of the instrument when the housing screws (2) are removed. Remove upper part of housing from lower part (3) and place on a clean surface.
  • Page 24 6651 - 1.3 Commissioning Only have the transmitter wired and connected by authorized personnel with the voltage disconnected. 1.3.3.1 Overview of terminals Lower part of housing Terminal board Relay board (option) M 16 x 1.5 screw connection* Relay terminals...
  • Page 25 6651 Ethernet - 1.3 Commissioning 25 1.3.3.2 Connecting voltage supply and analog outputs Terminal strip for voltage supply and analog outputs (item (5) of Overview of terminals, chapter 1.3.3.1, page 24). Feed cable with voltage supply and analog signal lines through opened M 16 x 1.5 screw connection (item (7) in Overview of...
  • Page 26 6651 Ethernet - 1.3 Commissioning The channel 3 shown on the circuit board cannot be used with this instrument. Requirement for the connecting cable of the supply:  Insulated with cross-section of at least 0.25 sq. mm.  The supply line must be secured against exceeding 8 A.
  • Page 27 6651 Ethernet - 1.3 Commissioning 27 Using plug-in connections (optional) Only insert or disconnect the plug-in connection when the voltage is disconnected. Clean the connector of the probe line and the coupling of any foreign matter. Do not disconnect the connector of the probe line from the instrument for extended periods to protect against contamination.
  • Page 28 6651 Ethernet - 1.3 Commissioning  For the connection, a double-insulated mains cable (sheathed cable) with a cross-section of at least 1.5 sq. mm must be used.  Cable connection (2) may not be routed in a loop within the tray (1).
  • Page 29 6651 Ethernet - 1.3 Commissioning 29 Use of relay as NO contact (NO = normally open) Alarm/status light (example of installation) 250 V AC/DC, 3 A The busy light (alarm/status light) only comes on when the relay is switched (closed). Monitoring the functionality of the alarm circuit is therefore not possible with this switching operation.
  • Page 30 6651 Ethernet - 1.3 Commissioning 1.3.3.4 Plug-in connection option As an option, the M screw connections of the signal and supply lines can be replaced with plug-in connections that are installed at the housing (see Fig. 1 and 2). The relay cabling occurs via standard cable entries and PG screw connections, see Fig.
  • Page 31 6651 is used as a testo Saveris component.  XML server function (DIP switch No. 1 = off) integration of the testo 6651 into the customer's Ethernet system. Important The testo 6651 with Ethernet module is delivered with the switch set at "on"...
  • Page 32 6651 Ethernet - 1.3 Commissioning Set the DIP switch no. 1 (1) on the Ethernet module. In the illustration: DIP switch no. 1 off, DIP switch no. 2 on Set Ethernet module on lower part of housing (see arrow).
  • Page 33 6651 Ethernet - 1.3 Commissioning 33 For the configuration of the Ethernet module, see following chapter. If you do not wish to perform a configuration, close the transmitter. Testo-Direct nfo@Testo-Direct.com 1.888.610.766 www. .com...
  • Page 34 6651 Ethernet - 1.3 Commissioning 1.3.3.6 Closing the instrument Place Ethernet module (A) on lower part of instrument (1). Set on upper part of instrument (2) and fix in place using housing screws (3). Testo-Direct nfo@Testo-Direct.com 1.888.610.766 www. .com...

  • Page 35: Ethernet Communication

    In general, the Ethernet module performs two functions:  a corresponding testo 6651 becomes a Saveris subscriber  a corresponding testo 6651 can be integrated into any Ethernet systems 1.3.4.2 Network connection ▪ Connect the Ethernet network cable to the transmitter via the Ethernet socket.
  • Page 36 The IP address of the transmitter can either be set via the P2A software (transmitter accessories) or via the configuration menu of testo Saveris (testo Saveris Startup Wizard).  Set IP address with the P2A software (see Chapter 117) or with the testo Saveris Startup Wizard (see instruction manual). Using Saveris ...
  • Page 37 6651 Ethernet - 1.3 Commissioning 37 Ensure that the Saveris software is not already open, for example in multi-user operation under ® Windows Vista. If multiple clients are installed in a network, make sure that no simultaneous changes are made to the system configuration by the clients during simultaneous operation of the clients.
  • Page 38 6651 Ethernet - 1.3 Commissioning 1.3.4.5 Integration into customer’s Ethernet system Precondition The user should be familiar with the structure of an XML document. Furthermore, enough knowledge should be available that this type of document can be downloaded and...
  • Page 39  Configuration data of relays (testo 6651)  User settings (testo 6651) XML codes (download) The table of xml codes is available for download at www.testo.de/transmitter as well as on the product CD Description Parameter Answer (see Appendix) Read off serial number of /data/getserialnumber serialnumber.xml...
  • Page 40 6651 Ethernet - 1.3 Commissioning Description Parameter Answer (see Appendix) Read off last status /data/getlaststatusmessage message of connected laststatusmessage.xml transmitter Read off service hour param=0 (for transmitter) /config/gethourscount hourscount.xml counter of transmitter or probe param=1 (for probe) Read off settings of...
  • Page 41 6651 Ethernet - 1.3 Commissioning 41 Description of the XML elements General elements XML tag Description Type measurement_value Parent element. Contains the child elements value, unit, resolution value Reading Numerical, decimal number unit Unit ASCII number_values Qty. Numerical, whole number Elements in calibration.xml...
  • Page 42 6651 Ethernet - 1.3 Commissioning Elements in firmwaredate.xml XML tag Description Type Base element. Contains the child firmware_date elements year, month, day year Year Numerical, whole number month Month Numerical, whole number Numerical, whole number Elements in heatertime.xml XML tag...
  • Page 43 6651 Ethernet - 1.3 Commissioning 43 Elements in options.xml XML tag Description Type Base element. Contains the child elements device_options, options production_options, country_option, option_counter device_options See device_options description Numerical, whole number See production_options Numerical, whole number production_options description Elements in reldefinition.xml...
  • Page 44 6651 Ethernet - 1.3 Commissioning Elements in usersettings.xml XML tag Description Type Base element. Contains the child elements pressure, h2o2, usersettings setting_display, backlight, contrast, language, disp_msg, h2o2_prozess pressure Absolute pressure Numerical, decimal number h2o2 H2O2 value Numerical, decimal number...
  • Page 45 6651 Ethernet - 1.3 Commissioning 45 XML tag Description Type measurement_value See general elements Parent element. Contains the child meas_status elements min, max, mean connector_info Channel (transmitter/probe) ASCII channel_type Parameter details ASCII min. Minimum reading Numerical, decimal number max.
  • Page 46 6651 Ethernet - 1.3 Commissioning statemsg description Content of statemsg is a double word type number (32 bit). The individual status messages are bit-coded here. If statemsg = 0 there are no new messages. If statemsg != 0: xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx ││││...
  • Page 47 6651 Ethernet - 1.3 Commissioning 47 xml files Appendix Note: “xxxx” = text message calibration.xml <?xml version=”1.0” encoding=”UTF-8” ?> <calibration_data> <unit>%rF</unit> <attenuation>1</attenuation> <cal_offset>0.000000</cal_offset> <cal_scale> <cal_min_scale>0.000000</cal_min_scale> <cal_max_scale>0.000000</cal_max_scale> </cal_scale> </calibration_data> collectivealarm.xml <?xml version=”1.0” encoding=”UTF-8” ?> <colalarmtable> <alarm_numbers>4</alarm_numbers> <alarm> <alarm_event>xxxx</alarm_event> <alarm_state>0</alarm_state> </alarm>...
  • Page 48 6651 Ethernet - 1.3 Commissioning firmwaredate.xml <?xml version=”1.0” encoding=”UTF-8” ?> <firmware_date> <year>2008</year> <month>3</month> <day>28</day> </firmware_date> heatertime.xml <?xml version=”1.0” encoding=”UTF-8” ?> <heatertime> <heatertimeoff>60</heatertimeoff> </heatertime> hourscount.xml <?xml version=”1.0” encoding=”UTF-8” ?> <hourcount> <hours>68</hours> </hourcount> identification.xml <?xml version=”1.0” encoding=”UTF-8” ?> <ident> <device_id>31</device_id> </ident>...
  • Page 49 6651 Ethernet - 1.3 Commissioning 49 </measurement_value> <measurement_value> <value>42.4</value> <unit>%rF</unit> </measurement_value> <measurement_value> <value>9.5</value> <unit>td°C</unit> </measurement_value> </online_values> options.xml <?xml version="1.0" encoding="UTF-8" ?> <options> <device_options>00000011</device_options> <production_options>xxxx</production_options> </options> reldefinition.xml <?xml version="1.0" encoding="UTF-8" ?> <relay_data> <relay_channel>0</relay_channel> <relay_number>0</relay_number> <relay_status>0</relay_status> <sw_point_charact>0</sw_point_charact> <sw_point_value>0.0</sw_point_value> <hysteresis_value>0.0</hysteresis_value> </relay_data> serialnumber.xml <?xml version="1.0"...
  • Page 50 6651 Ethernet - 1.3 Commissioning xml files Appendix <!ELEMENT serialnumber (number)> <!ELEMENT number (#PCDATA)> <!ELEMENT ident (device_id)> <!ELEMENT device_id (#PCDATA)> <!ELEMENT firmware_version(version)> <!ELEMENT version (#PCDATA)> <!ELEMENT firmware_date (year, month, day)> <!ELEMENT year (#PCDATA)> <!ELEMENT month (#PCDATA)> <!ELEMENT day (#PCDATA)>...
  • Page 51 6651 Ethernet - 1.3 Commissioning 51 <!ELEMENT contrast (#PCDATA)> <!ELEMENT language (#PCDATA)> <!ELEMENT disp_msg (#PCDATA)> <!ELEMENT h2o2_prozess (#PCDATA)> <!ELEMENT calibration_data (unit, attenuation, cal_offset, cal_scale)> <!ELEMENT attenuation (#PCDATA)> <!ELEMENT cal_offset (#PCDATA)> <!ELEMENT cal_scale (cal_minscale, cal_maxscale)> <!ELEMENT cal_minscale (#PCDATA)> <!ELEMENT cal_maxscale (#PCDATA)>...
  • Page 52 6651 Ethernet - 1.3 Commissioning status.xml <?xml version="1.0" encoding="UTF-8" ?> <mufstatus> <statemsg>0</statemsg> <staterel>0</staterel> <statecounter>1</statecounter> </mufstatus> usersettings.xml <?xml version="1.0" encoding="UTF-8" ?> <usersettings> <pressure>1013.0</pressure> <h2o2>0.0</h2o2> <setting_disp>1</setting_disp> <backlight>3</backlight> <contrast>5</contrast> <language>0</language> <disp_msg>1</disp_msg> <h2o2_prozess>0</h2o2_prozess> </usersettings> version.xml <?xml version="1.0" encoding="UTF-8" ?> <firmware_version> <version>V1.10</version> </firmware_version> viewchannels.xml <?xml version="1.0"...

  • Page 53: Adjusting The Instrument

    </view_channel> </view_channels> 1.3.5 Adjusting the instrument The testo adjusting concept allows the entire signal chain from the sensor signal (probe) and the digital signal (within the transmitter) through to the analog signal (transmitter output signal) to be adjusted (see diagram).
  • Page 54 - digital signal chain. The testo 6651 transmitter has digital probes whose adjustment information is stored in the probe's internal memory. Both 1-point and 2-point adjustments can thus be carried out on another testo 6651 (e.g. in the calibration laboratory). 1.3.5.1 Overview: Adjustment keys and test contacts Contact ch.
  • Page 55 The reference condition can be measured using a precise handheld instrument (e.g. testo 400/650 with precision humidity probe) or be created in an air conditioning cabinet.
  • Page 56 Connect Testo handheld instrument 400/650 (1) with connected humidity reference probe (3) (order no. reference set 0699 3656/20) to the service interface (5) of the testo 6651 via the adjustment adapter (2) (connected to the probe socket 1 of the handheld instrument).
  • Page 57 11.3 % RH and 75.3 % RH or 20 % RH and 80 % RH. The reference conditions are created either by using Testo humidity adjustment set (order no. 0554 0660, only for adjustment points 11.3 %RH and 75.3 %RH) or in the humidity generator.
  • Page 58  The service flap of the testo 6651 is open. Expose the humidity probe of the testo 6651 to the reference condition of 11.3 % RH for at least 1.5 hours at 25 °C. After this equalization period, press the 11.3 % adjustment key (4) for at least 10 seconds with something like a ball-point pen that is not too sharp.

  • Page 59: Analog Output Adjustment

    6651 Ethernet - 1.3 Commissioning 59 Completion of the adjustment is signalled by the LED (1) coming on permanently and the Probe reset status message is shown. Carry out the adjustment analogously for the reference condition 75.3 % RH. Press on the 75.3 % RH adjustment key (6) to do this.

  • Page 60: Operation

    1.4.1 Relationship between user menu and mini-DIN socket is active The testo 6651 can be parameterized using either the user menu or the P2A software (see volume 2, chapter 3, page 113). The testo 6651 humidity transmitter can only be operated via the display and keypad if the display option is available.

  • Page 61: Password Protection

    6651 Ethernet - 1.4 Operation 61  Attaching the key cover  The service flap is open (see Section Opening the instrument, chapter 1.3.3, page 22). Undo screws (3) and remove key frame (2). Insert key cover (1) into service flap and tighten screws (3).

  • Page 62: Structure Of User Menu

    6651 Ethernet - 1.4 Operation 1.4.4 Structure of user menu At the main menu level, the user menu comprises the following: Main menu of channel 1  Main menu of channel 2  Main Menu Alarm  Editing Settings main menu ...

  • Page 63: Overview Of The Testo 6651 User Menu

    6651 Ethernet - 1.4 Operation 63 1.4.5 Overview of the testo 6651 user menu Testo-Direct nfo@Testo-Direct.com 1.888.610.766 www. .com...
  • Page 64 6651 Ethernet - 1.4 Operation Testo-Direct nfo@Testo-Direct.com 1.888.610.766 www. .com...

  • Page 65: The Individual Main Menus

    1.4.6 The individual main menus 1.4.6.1 Editing Main Menu Channel 1 An overview is given in Overview of the testo 6651 user menu (see chapter 1.4.5, page 63). You can perform basic settings for channel 1. In Measuring Mode, press Set, select Main Menu Channel 1 using ...
  • Page 66 6651 Ethernet - 1.4 Operation 1.4.6.3 Editing Main Menu Alarm With the alarm, the relays, available as options, are programmed. In addition, the alarm statuses are shown on the display (top right) (even without relays). You can choose whether the alarm is used to monitor limit values or as a collective alarm.
  • Page 67  Using alarm as collective alarm or not using it at all If the collective alarm is assigned to an alarm, the relay is switched as soon as (at least) one of the warning or error messages of the testo 6651 transmitter (or the connected testo 6600 probe) is activated.
  • Page 68 6651 Ethernet - 1.4 Operation Backlight  The display illumination is changed. Edit/select parameter with  or , confirm with SET or cancel entry with ESC (the effect of the change in parameter can be seen during input). Contrast ...
  • Page 69 6651 Ethernet - 1.4 Operation 69 Continue to Main Menu Analysis using  or  or return to Measuring Mode by pressing ESC. 1.4.6.5 Editing Analysis main menu You can test the functionality of analog and relay outputs. In addition, you can read off the minimum and maximum readings (since the last voltage supply or reset of the min./max.
  • Page 70 6651 Ethernet - 1.4 Operation  Testing functionality of relay outputs Press Set, choose between Alarm 1, 2, 3, 4 with  or . Press SET. The relay can now be tested. You can choose between OFF and ON using ...
  • Page 71 6651 Ethernet - 1.4 Operation 71 1.4.6.6 Editing Message main menu The last messages can be called up and the display of the messages can be switched on or off. Operating hours at the time of message Message number/number of messages present Example: "4/7"...
  • Page 72 6651 Ethernet - 1.4 Operation 1.4.6.7 Calling up Main Menu Ident 6651 Instruments or probe type 2.01 Firmware version Serial Serial number 11111111 The serial numbers of the transmitter and probe can be read off. In Measuring Mode, press set, select Main Menu Ident using  or ...
  • Page 73 6651 Ethernet - 1.4 Operation 73  Enter reference value for 1-point adjustment Please also refer to chapter 1.3.5.2, 1-point adjustment (offset), page 55. In Measuring Mode, press SET, select Main Menu Adjust using  or  and confirm selection with SET.
  • Page 74 6651 Ethernet - 1.4 Operation  Performing analog adjustment Please refer to chapter 1.3.5.4, page 59. In Measuring Mode, press SET, select Main Menu Adjust using  or  and confirm selection with SET. Each channel is adjusted at three points in the analog range (at 10 %;...
  • Page 75 6651 Ethernet - 1.4 Operation 75 1.4.6.9 Editing Reset main menu You can reset the factory settings for the following: Instrument  Sensor/probe  Min./max. values  Resetting to the factory settings means resetting to the order specification, i.e. the specific condition at the time of supply to the customer.

  • Page 76: Status, Warning And Error Messages

    Warning messages and  Error messages  for either the testo 6651 or the connected testo 660x probe as applicable. All messages are stored in the transmitter with an operating hours stamp. Use the user menu (see Chapter 1.4.6.6, page 71) or P2A software (see volume 2, chapter 3, page 113) to view the message history.

  • Page 77: Transmitter Warning Messages

    Message Display Cause Remedying of fault 02101 2-point adjustment In the 2-point adjustment, Send the probe into Testo drift* corrections repeatedly Service occur in the same direction; this may indicate a sensor drift 00E00 T ambient high**...
  • Page 78 6651 Ethernet - 1.5 Status, warning and error messages Message Display Cause Remedying of fault 00E00 T process high** The process temperature Remove the probe from exceeds the temperature the process and take any designated for the probe necessary measures to...

  • Page 79: Transmitter Error Messages

    6651 Ethernet - 1.5 Status, warning and error messages 1.5.3 Transmitter error messages Error messages show a current malfunction. Message Display Cause Remedying of fault 03401 No probe signal The probe communication Ensure that the probe is interrupted connector is fully engaged in the transmitter.

  • Page 80: Handling Alarm Messages

    6651 Ethernet - 1.5 Status, warning and error messages 1.5.4 Handling alarm messages Shown on the Message Can be used for collective alarm display start/end Limit value Scaling changed Transmitter reset Reset Min/Max Transmitter refresh Probe connection Service plug...

  • Page 81: Namur Fault Conditions

    6651 Ethernet - 1.5 Status, warning and error messages 1 If multiple messages/alarms are activated at the same time, only the last message/alarm is shown. If this is cancelled, the other messages that are still active are no longer displayed.

  • Page 82: Maintenance And Cleaning

    6651 Ethernet - 1.6 Maintenance and cleaning 1.6 Maintenance and cleaning 1.6.1 Maintaining the instrument We recommend that the adjustment and settings of the transmitter be checked at regular intervals using the User menu (see chapter 1.4, page 60) or ...

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