TESTO 6681 Instruction Manual
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TESTO 6681 Instruction Manual

Humidity transmitters
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testo 6681 · Humidity transmitters
testo 6610 · Probes
P2A software · Parameterizing, adjusting and analyzing
software
Instruction manual Volume 1
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Summary of Contents for TESTO 6681

  • Page 1 6681 · Humidity transmitters testo 6610 · Probes P2A software · Parameterizing, adjusting and analyzing software Instruction manual Volume 1...
  • 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 About this document Please read this documentation through carefully and familiarize yourself ► with the product before putting it to use. Keep this document to hand so that you can refer to it when necessary. Hand this documentation on to any subsequent users of the product.
  • 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 6681 until it engages. " to " Example entries are in inverted commas, e.g.: The value "0"...

  • Page 5: Table Of Contents

    1.4.3 Password protection ..............43 1.4.4 Structure of user menu ............. 43 1.4.5 Overview of the testo 6681 user menu ........... 45 1.4.6 The individual main menus ............47 1.5 Status, warning and error messages ............. 59 1.5.1 Status messages ..............59 1.5.2...

  • Page 6: Transmitter

    Test benches • Drying processes • Production and storage air quality • Complex room climate applications. • 1.1.2 Scope of delivery The scope of delivery of the testo 6681 humidity transmitter includes the following: Key cover • Rear panel bracket •...

  • Page 7: Accessories

    6681 - 1.1 Specifications 7 1.1.3 Accessories The following accessories are available for the testo 6681 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 or on the website at...

  • Page 8: Dimensions

    6681 - 1.1 Specifications Analog output Housing operating temperature 4 to 20 mA ± 0.03 mA (2-wire) or -40 to 70 °C/-40 to +158 °F, with 0 to 1 V ± 1.5 mV (4-wire) or display from 0 - 50 °C/+32 to +122 °F...

  • Page 9: Product Description

    R 3 and R 4 Eyelet for measuring point panel 10 M 20 x 1.5 screw connection*, e.g. relay R 1 and R 2 11 Probe connector (testo 6610) 12 Upper part of housing Alternatively, NPT cable couplings or M plug-in...

  • Page 10: Usable Probes

    6681 - 1.2 Product description 1.2.2 Usable probes The testo 6681 humidity transmitter can be used with the following probes: probe Article no. Characteristic testo 6611 0555 6610-L11 Wall probe version; accuracy to ± 1 % RH; temperature range -20 °C to +70 °C/-4 to +158 °F...

  • Page 11: Analog Outputs

    In 2-wire operation, channel 1 is used for the supply. The two or optionally three channels are galvanically isolated in both 2- and 4-wire operation. Operation with the testo 6614 heated probe, the testo 6615 trace humidity probe, the relay option or with the background lighting of the optional display are only possible in 4-wire operation.

  • Page 12: Parameters

    6681 - 1.2 Product description 1.2.7 Parameters The following parameters are displayed: Relative humidity in %RH (technical) • Relative humidity in % WMO* (calculation according to the WMO • standard) Temperature °C and °F • Dewpoint in °Ctd and °Ftd •...
  • Page 13 6681 - 1.2 Product description 13 - after exchanging the unit, the measuring range recorded in the instrument is applied as standard. 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.
  • Page 14 6681 - 1.2 Product description Standard scaling Measuring range measuring Physical Parameter Unit probe range at 1013 hPa MIN MAX Dewpoint °Ctd 6611 +100 °Ftd 6611 +158 -112 +212 6612, 6613, 6614, °Ctd +100 +100 6617 6612, 6613, 6614, °Ftd...

  • Page 15: Alarm Handling

    The testo 6681 monitors limit values using relays. If a reading is outside the limit values, a relay to be specified by the user is switched.

  • Page 16: Commissioning

    1.3 Commissioning 1.3.1 Assembling the instrument 1.3.1.1 Wall mounting (for testo 6611/6613/6614/6615/6617 probes)  Attaching rear panel bracket Remove locking screw (item (4) of drawing below) and detach rear panel bracket from plastic bracket (item (2) of drawing below). Hold rear panel bracket in assembly position and mark the three drill holes.
  • Page 17 6681 - 1.3 Commissioning 17  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 18 6681 - 1.3 Commissioning 1.3.1.2 Duct mounting (for testo 6612 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 19: Connecting The Instrument

    6681 - 1.3 Commissioning 19 Fix the correct position of the probe shaft (9) with screw (11) and mark (insert probe shaft as far as possible). Slide plastic bracket (2) on the back of the transmitter onto bracket (3, 4) until it engages.
  • Page 20 6681 - 1.3 Commissioning Loosen and remove housing screws (2). Remove upper part of housing from lower part (3) and place on a clean surface. Warning! Electrical voltage. Danger of injury! De-energize the mains connection before connecting the transmitter! Only have the transmitter wired and connected by authorized personnel with the voltage disconnected.
  • Page 21 6681 - 1.3 Commissioning 21 1.3.2.1 Overview of terminals Lower part of housing M 16 x 1.5 screw connection* Relay board (option) Earthing terminal (external) Relay terminals 10 M 20 x 1.5 screw connection* Insulating trough for relay board...
  • Page 22 6681 - 1.3 Commissioning 1.3.2.2 Connecting voltage supply and analog outputs Terminal strip for voltage supply and analog outputs, item (5) of Overview of terminals, chapter 1.3.2.1. Feed cable with voltage supply and analog signal lines through opened M 16 x 1.5 screw connection (item (8) in Overview of terminals, chapter 1.3.2.1).
  • Page 23 6681 - 1.3 Commissioning 23 If the channels have to be galvanically isolated, a separate mains unit must be used for each channel. Wiring diagram for 4-wire system (0 to 20 mA/4 to 20 mA/0 to 1 V/0 to 5 V/0 to 10 V)
  • Page 24 6681 - 1.3 Commissioning 1.3.2.3 Connecting the relay outputs Only have the transmitter wired and connected by authorized personnel with the voltage disconnected. Relay terminal strip, item (3) of Overview of terminals, chapter 1.3.2.1. There is the option of twelve terminals for a total of four relays. The designations NC/C/NO (normally closed contact/root or pin/normally open contact) are etched on the surface of the board.
  • Page 25 6681 - 1.3 Commissioning 25 Connection note 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 •...
  • Page 26 6681 - 1.3 Commissioning Use of relay as NC contact (NC = normally closed) Alarm/status light (example of installation) 250 V AC/DC, 3 A The busy light (alarm/status light) is permanently on until the relay opens or the circuit is interrupted. This circuit can...
  • Page 27 6681 - 1.3 Commissioning 27 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. Close M 20 x 1.5 screw connection (item (10) in Overview of terminals, chapter 1.3.2.1).
  • Page 28 6681 - 1.3 Commissioning Plug-in connections for power supply and channels M12 plug-in connection (5-pin) socket (1) View of the plug-in connections in the installed state from outside Assignment. V 24 - V 24 + + Ch 1 - Ch 1 M12 plug-in connection (5-pin) connector (2) Assignment.
  • Page 29 1.3.2.5 Creating the PE/earthing terminal As the testo 6681 has a metal housing, we recommend that the instrument be earthed. This can be done using the earthing terminal within the instrument (1) or the earthing terminal outside of the instrument (2).
  • Page 30 6681 - 1.3 Commissioning 1.3.2.6 Closing the instrument Place upper part of instrument on top of lower part (see arrow) and fix in place with housing screws (1). Close the service flap and tighten screws (2).

  • Page 31: Adjusting The Instrument

    - digital signal chain. The testo 6681 transmitter has digital probes whose adjustment information is stored in the probes' internal memory. Both 1-point and 2-point adjustments can thus be carried out on another testo 6681 (e.g. in the calibration laboratory).
  • Page 32 6681 - 1.3 Commissioning 1.3.3.1 Overview: Adjustment keys and test contacts Status LED Contact ch. 1 + Contact ch. 1 - Adjust key 11.3 % Service interface Adjust key 75,3 % Contact ch. 2 + Contact ch. 2 - 1.3.3.2...
  • Page 33 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 34 A 2-point adjustment cancels any previous 1-point adjustment. Adjustment with the standard Testo adjustment salt pots is not suitable for the testo 6614 (heated for high-humidity applications) and testo 6615 (trace humidity) probes. The reference conditions should be generated in a humidity generator to adjust these probes.
  • Page 35 11.3 % (salt pots) (humidity generator)  The service flap of the testo 6681 is open. Expose the humidity probe of the testo 6681 to the reference condition of 11.3 % RH for at least 1.5 hours at 25 °C.
  • Page 36 6681 - 1.3 Commissioning 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. The LED (1) flashes when the adjustment process begins. At the same time, the 2-point adjustment 11.3 % status message...
  • Page 37 P2A software (see volume 2, chapter 3) or enter it via the user menu (see chapter 1.4.6.9). Disconnect connections between multimeter and contacts of the testo 6681 and close service flap.  Adjusting analog output 3 (optional) If the optional third analog output is to be adjusted, a cable connection to measure the analog value must be installed.
  • Page 38 Mist With the testo 6614, the rear of the Testo humidity sensor is heated, creating a microclimate around the sensor (within the filter) that is constantly 5 K warmer than the actual process conditions. As can be seen in the Mollier diagram, this reduces the relative humidity at the sensor from around 100 % RH to a lower value, e.g.
  • Page 39 This means that extremely accurate measuring results are also attained to -60 °Ctd. To this end, a temperature sensor is fitted on the back of the testo 6615 which is used as a heater. A humidity and temperature value pair is taken in both the unheated and heated state.
  • Page 40 6681 - 1.3 Commissioning For the effectiveness of the self-adjustment the following prerequisites are decisive over the duration of the self-adjustment. The process temperature should not vary by more than 0.5K • The dew point temperature should remain stable, as far as possible •...

  • Page 41: Operation

    1.4.1 Relationship between user menu and mini-DIN socket is active The testo 6681 can be parameterized using either the user menu or the P2A software (see volume 2, chapter 3). The testo 6681 humidity transmitter can only be operated via the display and keypad if the display option is available.

  • Page 42: Key Cover

    6681 - 1.4 Operation 1.4.2 Key cover To prevent unauthorized operation of the keys, the standard key frame can be replaced with a key cover (see below). If the key cover has been assembled, the service flap must be opened for operation, see Section Opening the instrument, chapter 1.3.2.

  • Page 43: Password Protection

    6681 - 1.4 Operation 43 1.4.3 Password protection The user menu can be protected with a four-digit numerical code (see Editing Main Menu Settings, chapter 1.4.6.5) so that access to the user menu is denied to unauthorized persons not familiar with this numerical code.
  • Page 44 6681 - 1.4 Operation Four keys enable the user to navigate/scroll through the menus and enter/amend values and settings: Function/description In Measuring Mode: changes to parameterization In Parameterizing Mode: confirms a selection or setting Leaves a menu (without modifying any settings) Selecting: scrolls through menus (downwards) or selectable ...

  • Page 45: Overview Of The Testo 6681 User Menu

    6681 - 1.4 Operation 45 1.4.5 Overview of the testo 6681 user menu...
  • Page 46 6681 - 1.4 Operation...

  • Page 47: The Individual Main Menus

    1.4.6.1 Editing Main Menu Channel 1 An overview is given in Overview of the testo 6681 user menu, chapter 1.4.5. You can perform basic settings for channel 1. In Measuring Mode, press SET, select Main Menu Channel 1 using ...
  • Page 48 6681 - 1.4 Operation 1.4.6.4 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 to be used to monitor limit values or as a collective alarm.
  • Page 49  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 6681 transmitter (or the connected testo 6610 probe) is activated.
  • Page 50 6681 - 1.4 Operation  Editing display settings You can set the brightness and contrast of the display. Select Display Settings using  or  and confirm selection with SET. Select Backlight or Contrast using  or  and confirm selection with SET.
  • Page 51 6681 - 1.4 Operation 51  Editing H proportion by weight (optional with 3rd analog output) This menu is only used to parameterize humidity measurements in H atmospheres (e.g. in sterilization processes) and determines whether °Ctm,°Ftm or %rFm is the output parameter.
  • Page 52 6681 - 1.4 Operation Press SET and return to Abs. pressure value Return to Main Menu Settings by pressing ESC. Continue to Main Menu Analysis using  or  or return to Measuring Mode by pressing ESC.  Editing code settings You can set the access code (password).
  • Page 53 6681 - 1.4 Operation 53 Channel 1 test contacts Service interface Channel 2 test contacts Ends of channel 3 cables Multimeter Analog output 3: Connect measuring cables to terminals for channel 3, guide measuring cables out of housing and perform measurement outside of the transmitter, see diagram.
  • Page 54 6681 - 1.4 Operation 1.4.6.7 Editing Message main menu Messages can be confirmed/acknowledged, 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...
  • Page 55 6681 - 1.4 Operation 55 1.4.6.8 Calling up Main Menu Ident 6681 Instruments or probe type 2.01 Firmware version Serial 11111111 Serial number The serial numbers of the transmitter and probe can be read off. In Measuring Mode, press SET, select Main Menu Ident using  or ...
  • Page 56 6681 - 1.4 Operation  Enter reference value for 1-point adjustment Please also refer to chapter 1.3.3.2. In Measuring Mode, press SET, select Main Menu Adjust using  or  and confirm selection with SET. Reference value % RH is displayed.
  • Page 57 6681 - 1.4 Operation 57  Performing analog adjustment Please refer to chapter 1.3.3.4. 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 58 6681 - 1.4 Operation 1.4.6.10 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 59: Status, Warning And Error Messages

    Warning messages and • Error messages • for either the testo 6681 or the connected testo 661x probe as applicable. All messages are stored in the transmitter with an operating hours stamp. Use the user menu (see chapter 1.4.6.7, page 54) or P2A software (see volume 2, chapter 3, page 111) to view the message history.

  • Page 60: Warning Messages

    2-point adjustment 80 % As part of the 2-point adjustment, an adjustment is performed at 80 % RH 02105 Self-adjustment active For testo 6615 probe only: The probe performs an automatic self-adjustment 02518 Probe reset Probe reset: The probe performs a reset 1.5.2 Warning messages...
  • Page 61 2-point adjustment where necessary) If the problem persists, contact Testo Service 02809 Sensor early For testo 6617 probe only: Carry out visual warning* The cover electrode of the inspection sensor is damaged; this If the mirror-like surface of may soon cause the sensor...

  • Page 62: Error Messages

    T sensor short- Short-circuit in temperature Contact Testo Service circuit sensor 0300D T sensor broken The temperature sensor is Contact Testo Service damaged (sensor broken) 03105 Self-adjustment For testo 6615 probe only: Contact Testo Service error The automatic self- adjustment was faulty...

  • Page 63: Handling Alarm Messages

    6681 - 1.5 Status, warning and error messages 63 1.5.4 Handling alarm messages Shown on the Additional Can be used for collective alarm display Message start/end New limit value Scaling changed Transmitter reset Reset Min/Max Transmitter refresh Probe connection...
  • Page 64 6681 - 1.5 Status, warning and error messages Shown on the Additional Can be used for collective alarm display Message start/end % RH short-circuit %RH sensor broken T short-circuit T sensor broken Self-adjustment error If multiple messages/alarms are activated at the same time, only the last message/alarm is shown.

  • Page 65: Namur Fault Conditions

    6681 - 1.5 Status, warning and error messages 65 1.5.5 Namur fault conditions If the faults named in the following table occur, the analog outputs output special values that enable a general fault warning in the higher-level control system. The values correspond to the "Namur" industry standard.

  • Page 66: Maintenance And Cleaning

    6681 - 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 (chapter 1.4) or • P2A software (volume 2, chapter 3) •...
  • Page 68 Testo SE & Co. KGaA Celsiusstr. 2 79822 Titisee-Neustadt Germany Tel.: +49 7653 681-0 E-Mail: info@testo.de www.testo.com 0970 6681 en 05 Vol1...
  • Page 69 6681 · Humidity transmitters testo 6610 · Probes P2A software · Parameterizing, adjusting and analyzing software Instruction manual Volume 2...
  • Page 71 2.2.4 testo 6613 cable probe.............. 88 2.2.5 testo 6614 heated cable probe ..........92 2.2.6 testo 6615 trace humidity cable probe (self-adjustment) ..95 2.2.7 testo 6617 cable probe (self-monitoring) ........99 2.3 Commissioning ..................103 2.3.1 Installing the probe ..............103 2.3.2...
  • Page 72 ................144 IPS AND ASSISTANCE 4.1 Questions and answers ............... 144 4.2 Accessories and spare parts ............... 145 4.2.1 Ordering options for testo 6681 transmitter (0555 6681) ....148 4.2.2 Ordering options for testo 6610 probes (0555 6610) ...... 152...

  • Page 73: Testo 6610 Probes

    - 2.1 Specifications 73 testo 6610 probes 2.1 Specifications 2.1.1 Functions and use The plug-in, adjusted probes from the testo 6610 range are used in conjunction with the testo 6681 humidity transmitter. These measuring units are suitable for the following applications, for example: Process instrumentation •...
  • Page 74 - 2.1 Specifications 2.1.1.2 The Testo humidity sensor With the Testo humidity sensor, which has been in successful use and continually improved for more than twenty years, the focus has from the very beginning been on both accuracy parameters, namely measuring uncertainty and long-term stability.

  • Page 75: Design Of The Probe

    Early warning when sensor corrosion is starting to develop • The testo 6617 probe is able to signal the first signs of corrosion. The probe can thus be changed at an early stage without interrupting the machine availability.

  • Page 76: Accessories

    Probe Protection cap, sensor underneath probe 2.1.3 Accessories The following accessories are available for probes in the testo 6610 range: Filters and protection caps (see chapter 2.2.1.4). • Calibration certificates according to ISO and DAkkS (see chapter 4.2, • Accessories and spare parts).
  • Page 77 GUM (Guide to the Expression of Uncertainty in Measurement/DIN V ENV 13005). All parts that make up the measuring uncertainty given by Testo are listed below. When comparing the measuring uncertainty/accuracy between manufacturers, which components are included is to be taken into account. In many cases, not all elements that contribute to measuring uncertainty are assessed, for example if the error contribution of the production adjustment is shown separately or not at all.
  • Page 78 6610 - 2.2 Product description The measuring uncertainty of the probe includes the sensor and its electronics as well as the output of the digital measuring signal: 1. Linearity including scatter Systematic error and scattering of the components (due to manufacturing tolerances) 2.
  • Page 79 Nxx Cable length N 00 Without cable (testo 6611) N 01 1 m cable length (testo 6613, 6614, 6615, 6617) N 02 2 m cable length (testo 6613, 6614, 6615, 6617) N 05 5 m cable length (testo 6613, 6614, 6615, 6617)
  • Page 80 M 08 0554 6000 Filter for H atmospheres When ordering the probe, please use this filter code, cf. chapter 2.2.1.3, Ordering options for testo 6610 probes (0555 6610). When purchasing a replacement (filters only), please use this order number...

  • Page 81: Testo 6611 Wall Probe

    6610 - 2.2 Product description 81 2.2.2 testo 6611 wall probe The wireless testo 6611 probe is inserted into the testo 6681 humidity transmitter that is mounted on the wall and ready-wired. At a glance Filter (including: humidity and temperature sensor)
  • Page 82 6610 - 2.2 Product description Technical Data Refer to the charts below for the Parameters correlation between temperature Humidity (% °Ctd/°Ftd), etc. and accuracy. Temperature Length 70 mm As with length of 200 mm, but with Measuring range additional measuring error, specified...
  • Page 83 % RH| as a factor of process humidity % RH % RH Temperature error as a factor of process temperature and temperature of electronics System error 6681 + probe, electronics 25 °C/+77 °F System error 6681 + probe, electronics -25 °C to +70 °C/-13 to °...

  • Page 84: Testo 6612 Duct Probe

    6610 - 2.2 Product description 2.2.3 testo 6612 duct probe The testo 6612 probe measures the humidity and temperature in air ducts. At a glance Filter (including: humidity and temperature sensor) Probe shaft Wall/duct holder (accessories, Order no.: 0554 6651)
  • Page 85 Meeting the top accuracy requirements • Air duct applications for which a metal housing is required. • testo 6681 transmitter testo 6612 duct probe Technical Data Parameters ± (1,0 % RH + 0.007 x reading) for 0 to 90 % RH Humidity (% RH/°Ctd/°Ftd), etc.
  • Page 86 L = approx. 200/300/500/800 mm please use cutting ring screw L – A = 165/265/465/765 mm connection (order no. 0554 1795). Measuring accuracy of testo 6612 duct probe ± Humidity error according to amount | % RH| as a factor of process...
  • Page 87 - 2.2 Product description 87 Temperature error as a factor of process temperature and temperature of electronics System error 6681 + probe, electronics 25 °C/+77 °F System error 6681 + probe, electronics -25 °C to +70 °C/-13 to +158 °F...

  • Page 88: Testo 6613 Cable Probe

    6610 - 2.2 Product description 2.2.4 testo 6613 cable probe The testo 6613 probe is used when the spatial separation of the transmitter and probe is required. At a glance Connector Probe cable Probe shaft Filter (including: humidity and temperature sensor) In the event of overpressures, the probe may become a projectile.
  • Page 89 6610 - 2.2 Product description 89 We recommend that the testo 6614 (heated) probe be used for continuous high-humidity processes. testo 6681 transmitter testo 6613 cable probe Technical Data ± (1,4 % RH + 0.007 x reading) for Parameters 90 to 100 % RH Humidity (% RH/°Ctd/°Ftd), etc.
  • Page 90 A, see Table Filters, chapter 2.2.1.4. please use cutting ring screw connection (order no. 0554 1795). Measuring accuracy of testo 6613 cable probe ± Humidity error according to amount | % RH| as a factor of process humidity % RH...
  • Page 91 - 2.2 Product description 91 Temperature error as a factor of process temperature and temperature of electronics System error 6681 + probe, electronics 25 °C/+77 °F System error 6681 + probe, electronics -25 °C to +70 °C/-13 to +158 °F...

  • Page 92: Testo 6614 Heated Cable Probe

    - 2.2 Product description 2.2.5 testo 6614 heated cable probe The testo 6614 heatable probe is suitable for use in high-humidity processes in which there is the possibility of condensation for the probe. Please also see volume 1, chapter 1.3.3.5, for the functional principle of the testo 6614.
  • Page 93 • higher than +1.5 % RH, is to be expected. To prevent this error and ensure the highest measuring accuracy: Use condensation protector 0554 0166. testo 6681 transmitter testo 6614 heated cable probe Assembly distance max. 10 cm Temperature probe...
  • Page 94 If installing probe under pressure, please use cutting ring screw connection (order no. 0554 1795). Measuring accuracy of testo 6614 heated cable probe ± Humidity error according to amount | % RH| as a factor of process humidity...

  • Page 95: Testo 6615 Trace Humidity Cable Probe (Self-Adjustment)

    Temperature error as a factor of process temperature and temperature of electronics System error 6681 + probe, electronics 25 °C/+77 °F System error 6681 + probe, electronics -25 °C to +70 °C/-13 to +158 °F 2.2.6 testo 6615 trace humidity cable probe (self-adjustment) The testo 6615 probe corrects deviations in measurements by means of self- adjustment.
  • Page 96 6610 - 2.2 Product description At a glance Connector Probe cable Probe shaft Filter (including: humidity and temperature sensor) In the event of overpressures, the probe may become a projectile. For assembly, see Pressure resistance on the following page.
  • Page 97 6610 - 2.2 Product description 97 testo 6681 transmitter testo 6615 trace humidity cable probe Technical Data Parameters ± 0,2 Ktf/K at 25 °C...50 °C/ 77 ° F...+122 °F Dewpoint (°Ctd/°Ftd), etc. ± 0,4 Ktf/K at 50 °C...120 °C/ Temperature +122 °...
  • Page 98 %RH| dependent on the process dewpoint °Ctd Temperature error as a factor of process temperature and temperature of electronics System error 6681 + probe, electronics 25 °C/+77 °F System error 6681 + probe, electronics -25 °C to +70 °C/-13 to +158 °F...

  • Page 99: Testo 6617 Cable Probe (Self-Monitoring)

    - 2.2 Product description 99 2.2.7 testo 6617 cable probe (self-monitoring) The testo 6617 probe is used if spatial separation of the transmitter and probe is required, particularly for media (gases, vapours) which can jeopardize/damage the humidity sensor (the testo 6617 has a self-monitoring and early-warning function for such applications).
  • Page 100 Connections (protected against corrosion) Dielectric layer The testo 6617 has a unique self-monitoring function. This allows early detection of damage to the sensor, e.g.: Mechanical damage (e.g. scratches) • Damage from aggressive gases (e.g. acids in aerosol form) •...
  • Page 101 6610 - 2.2 Product description 101 testo 6681 transmitter testo 6617 cable probe (self-monitoring) Technical Data Parameters 0.02 % RH/K, dependent upon the electronics temperature Humidity (% RH/°Ctd/°Ftd) (with a deviation of 25 °C/+77 °F) Temperature Temperature Measuring range ±0.15 °C (0.27 °F)
  • Page 102 % RH| as a factor of process humidity % RH % RH Temperature error as a factor of process temperature and temperature of electronics System error 6681 + probe, electronics 25 °C/+77 °F System error 6681 + probe, electronics -25 °C to +70 °C/-13 to +158 °F...

  • Page 103: Commissioning

    The testo 6611 probe (wall version) simply has to be inserted into the socket of the testo 6681 transmitter. 2.3.1.2 Installing the testo 6612 duct probe A description of the duct mounting of the testo 6612 probe can be found in volume 1, chapter 1.3.1.2. 2.3.1.3 Installing testo 6613/6614/6615/6617 probes If used with these probes, the testo 6681 transmitter is mounted on the wall, see volume 1, chapter 1.3.1.1.
  • Page 104 When mounting the testo 6614 heated probe version, the temperature probe must be secured as close to the humidity probe as possible (max. 10 cm). An appropriate assembly tool is supplied with the testo 6614. Wall/duct holder Order no. 0554 6651...
  • Page 105 6610 - 2.3 Commissioning 105 Duct mounting of probe Engage transmitter in the holder on the end of the duct probe Hole ∅ 12.5 mm Wall/duct holder Order no. 0554 6651 Only atmospheric processes up to approx. 1 bar positive pressure.
  • Page 106 - 2.3 Commissioning Duct mounting of testo 6614 heated probe When mounting the testo 6614 heated probe version, the temperature probe must also secured at a distance of approximately 10 cm from the humidity probe. An appropriate assembly tool is supplied with the testo 6614.

  • Page 107: Connecting/Removing The Probe To/From The Transmitter

    2.3.2 Connecting/removing the probe to/from the transmitter • Insert probe connector into socket of testo 6681 until it engages. The testo 6681 identifies which probe is connected. To remove the probe, the lock release button on the probe must be •...
  • Page 108 Screw on protection cap by hand, i.e. do not tighten it using a tool. 2.4.1.2 Replacing the filter/protection cap for testo 6612 duct version Do not damage the sensors when exchanging the filter/the protection cap and do not touch their surfaces!
  • Page 109 6610 - 2.4 Maintenance and cleaning 109 Unscrew defective filter/protection cap from probe shaft and screw on new filter/protection cap. Screw on protection cap by hand, i.e. do not tighten it using a tool. Replace O-ring (6) if necessary. Push probe shaft into duct as far as the marking and fix position with screw (9).

  • Page 110: Cleaning The Instrument And Filter/Protection Cap

    To maintain the extremely high accuracy of the testo 6610 probe, customers are not able to replace the sensor. Please contact your Testo Service team for this.

  • Page 111: Parameterizing, Adjusting And Analyzing Software (P2A Software)

    • This upgrade can be downloaded free of charge at any time from the • Testo homepage www.testo.com/download-center (requires registration). The software must only be bought one time, even for owners of several testo transmitters. 3.1.1 Functions and use In the P2A software, two different file types are used: The instrument and the parameter file.

  • Page 112: System Requirements

    P2A software - 3.1 Specifications Parameter file Parameter files are not tied to a specific individual transmitter and contain only parameter data/no history data. If you use various instruments of the same type, you can create parameter files once (e.g. by saving the appropriate instrument file as the parameter file) and transmit these onto the other instruments.

  • Page 113: Scope Of Delivery

    USB driver CD. 3.2.1.3 P2A software upgrade 1. Download and store P2A software upgrade from www.testo.com/download-center (requires registration). 2. Select folder into which the downloaded Zip file was stored, and unzip the file. 3. Start file P2A upgrade.exe.

  • Page 114: Starting The Software

    > Click on All Programs ( Windows ® 7, Windows ® 8, Windows ® Testo | P2A- Software. In Windows 7 the window User account control is ® opened when starting the software the first time > Click on Accept.

  • Page 115: Using The Software

    P2A software - 3.3 Using the software 115 3.3 Using the software 3.3.1 User interface Menu bar: Menu Command Explanation File Open Shows the Windows dialogue for searching and opening files. Save as Saves the parameters of an instrument or parameter file under a new name.
  • Page 116 P2A software - 3.3 Using the software Menu Command Explanation View Toolbar Activates/deactivates the toolbar or status bar. Status bar Check Checks the connections to a connected instrument instrument without the instrument having to be connections activated. Service A text file with the most important information on the computer and the software is opened via Display service data.

  • Page 117: Editing Instrument/Parameter File

    P2A software - 3.3 Using the software 117 Function buttons: [Change parameterization] see chapter 3.3.2 [Test/analyze transmitter] see chapter 3.3.3 [Adjust transmitter] see chapter 3.3.4 [Transmitter history] see chapter 3.3.5 Dialogues on editing and testing the instrument are opened by means of the buttons.
  • Page 118 P2A software - 3.3 Using the software Unit/analog Explanation output All analog outputs are parameterized in this mask. Unit/analog Unit: 0 to 1 V/5 V/10 V or 4 to 20 mA. output Vertical: Current version of the analog output (cannot be (graphic) changed).
  • Page 119 P2A software - 3.3 Using the software 119 Field Explanation Unit Selection of the physical unit. When changing the unit, standard values are set for scale minimum and maximum (see transmitter instruction manual for the scale final values). Caution! When changing the phys. unit, the relay limit values are set to the assigned default values.
  • Page 120 P2A software - 3.3 Using the software Relay limit Explanation values 1 to 4 In this mask, the relays or display alarms are parameterized Only have the transmitter wired and connected by authorized personnel with the voltage disconnected. Relay x Four relays are available (optional).
  • Page 121 P2A software - 3.3 Using the software 121 Field Explanation If switched to ON (NO contact) or OFF (NC contact) monitoring above the limit value; in the event of a subsequent undershooting of limit value minus hysteresis, it is switched to OFF (NO contact) or ON (NC contact). The graphic display in the centre of the screen refers to the relay wiring as a NO contact (ON).
  • Page 122 P2A software - 3.3 Using the software Collective Explanation alarm Selection of the messages (error, etc.) that should result in a collective alarm (OR linkage). List field with Selection of which messages generated in the transmitter checkboxes should be signalled as the collective alarm via the corresponding relay.
  • Page 123 P2A software - 3.3 Using the software 123 Basic Explanation settings Setting the absolute pressure and selection of the H evaporation process for the parameter °Ctm). Absolute The absolute pressure is included in the calculation of the pressure following units: °C or °F g/kg or gr/lb...
  • Page 124 P2A software - 3.3 Using the software Display Explanation Setting the display functions (if a display is available on the transmitter). Display lighting is permanently switched on. Continuous display lighting Display lighting When a particular button on the instrument is pressed, the when button is display lights up for 10 seconds.
  • Page 125 Valid password Display of the current password. Self- Explanation adjustment Parameterizing of testo 6615 probe, if this is used. (See volume 1, chapter 1.3.3.6, page 39 and chapter 2.2.7). Activate self- Perform adjustment of testo 6615 probe (auto- adjustment correction).
  • Page 126 The original name (Instrument type, Serial number) is suggested with the current date/time as standard, e.g. "testo 6681 01234578 061120 1403.cfp". For a standard installation, the files are saved under "C:\Documents and Settings\All Users\Shared Documents\P2A Software". The path can differ depending on the version of the operating system.

  • Page 127: Analyzing/Testing The Transmitter

    P2A software - 3.3 Using the software 127 You can also open parameter files that are stored in other directories. Click on File > Open in the menu bar. Select the storage location and click on the requisite file. Click on [Open]. The selected file is opened.
  • Page 128 P2A software - 3.3 Using the software Click on [Test/analyze transmitter]. The Properties of <Instrument type> <Serial number> dialogue is opened with the Test/analyze transmitter register. Perform action: Action Explanation Carry out factory Reset the unit, limit value and hysteresis parameters to reset: factory settings (see chapter 3.3.3.2).
  • Page 129 P2A software - 3.3 Using the software 129 3.3.3.3 Testing channel 1/2/3 analog output  The required instrument file is marked. Click on [Test/analyze transmitter]. The Properties of <Instrument type> <Serial number> dialogue is opened with the Test/analyze transmitter register. Mark channel and test values.
  • Page 130 P2A software - 3.3 Using the software Field/button Explanation [Activate] The entered default value is forwarded to the corresponding analog output and to the test contacts by clicking. A warning informs that the value is being transmitted to the connected instrument in the event of existing cabling. Now check the analog output using a precise multimeter.
  • Page 131 P2A software - 3.3 Using the software 131 Field/button Explanation Check the relay function (see volume 1, chapter 1.4.6.6). [Activate relay Close contact. A warning informs that the value is being transmitted to a connected PLC, external display, etc. in the event of existing cabling.
  • Page 132 P2A software - 3.3 Using the software 3.3.3.5 Displaying min./max. values The transmitter saves the minimum or maximum value for each channel (measured since the last voltage supply or since the last manual reset).  The required instrument file is marked. Click on [Test/analyze transmitter].

  • Page 133: Adjusting The Transmitter

    P2A software - 3.3 Using the software 133 The values are reset to the default settings. Click on [OK] or [Cancel] to close the dialogue. 3.3.4 Adjusting the transmitter This function is used to adjust an attached instrument. The following adjustments may be carried out using the software: 1-point adjustment (offset) •...
  • Page 134 P2A software - 3.3 Using the software Field Explanation °C/°F Selection of the unit; only for temperature adjustment. Current Reading in °C/°F or % RH. reading Readings are updated every second. Reference Entry of the read-off value from the reference measuring value instrument.
  • Page 135 P2A software - 3.3 Using the software 135 3.3.4.2 2-point adjustment Also see volume 1, chapter 1.3.3.3. Expose the reference measuring instrument and the instrument to be adjusted to the same constant conditions and wait for equalization period to lapse. Mark the instrument file of the connected instrument.
  • Page 136 P2A software - 3.3 Using the software Field Explanation Current Reading in % RH. reading Readings are updated every second. Reference Entry of the read-off value from the reference measuring value instrument. Permissible entries: Lower adjustment point 10.3 to 12.3 % RH Upper adjustment point 74.3 to 76.3 % RH.
  • Page 137 P2A software - 3.3 Using the software 137 3.3.4.3 Adjusting the analog output Connect precision multimeter (see volume 1, chapter 1.3.3.4). Mark the instrument file of the connected instrument. Click on [Adjusting the transmitter]. The Properties of <Instrument type> <Serial number> dialogue is opened with the Adjusting the transmitter register.

  • Page 138: Transmitter History

    P2A software - 3.3 Using the software 3.3.5 Transmitter history Parameterizations, adjustment processes and messages that have occurred are registered in the transmitter with an operating hours stamp. In the history overviews (explained later in more detail), past processes and events can be made visible.
  • Page 139 P2A software - 3.3 Using the software 139 Parameterizati Explanation on history Date/time Format of the PC time is adopted from the settings of the operating system. User Name with which the user is logged into the operating system. "MUF" (= transmitter) if the change was performed at the instrument.
  • Page 140 P2A software - 3.3 Using the software Adjustment Explanation histories Selection: 1-point adjustments/2-point adjustments/Analog adjustments. Date/time Format of the PC time is adopted from the settings of the operating system. User Name with which the user is logged into the operating system.
  • Page 141 P2A software - 3.3 Using the software 141 Column Explanation Actual value 1-point adjustment: If no changes were performed, no before value is displayed. adjustment Offset from 1-point adjustment: Value before the adjustment. Offset to 1-point adjustment: Value after the adjustment. Offset 2-point adjustment: Difference between target and actual value reported by instrument.
  • Page 142 P2A software - 3.3 Using the software Error/status Explanation messages The table is shown only for error and status messages that were generated in the transmitter and were transferred and saved there via the connection to the P2A software. Date/time Format of the PC time is adopted from the settings of the operating system.
  • Page 143 P2A software - 3.3 Using the software 143 The printing job is automatically sent to the default printer for the operating system. The printout can be edited using [Set up printer…]. Click on [OK] or [Cancel] to close the dialogue.

  • Page 144: Tips And Assistance

    When does a stable current reading After approx. 20 seconds appear? If we could not answer your question, please contact your dealer or Testo Customer Service. For contact data, see back of this document or web page www.testo.com/service-contact...

  • Page 145: Accessories And Spare Parts

    4.2 Accessories and spare parts 145 4.2 Accessories and spare parts An overview of the probes that can be used with the testo 6681 can be found in chapter 1.2.2. Designation Article no. Interface and software P2A software (parameterizing, adjusting, analyzing) incl. USB...
  • Page 146 146 4.2 Accessories and spare parts Dewpoint measurement (only with testo 6615) Pre-filter for the protection of the measurement chamber and sensor 0554 3311 from contamination Precision chamber for adjustable flow impact 0554 3312 Ethernet Ethernet module for installation by customer...
  • Page 147 4.2 Accessories and spare parts 147 Calibration Standard ISO calibration certificate, transmitter + probes 0520 0176 Special ISO calibration certificate, transmitter + probes 0520 0066 Standard DAkkS calibration certificate, transmitter + probes 0520 0276 Special DAkkS calibration certificate, transmitter + probes 0520 0236 ISO- calibration certificate humidity, probes 0520 0076...

  • Page 148: Ordering Options For Testo 6681 Transmitter (0555 6681)

    148 4.2 Accessories and spare parts 4.2.1 Ordering options for testo 6681 transmitter (0555 6681) Order code Characteristic Version Currently no further selection of variants Bxx Analog output 4 to 20 mA (2-wire, 24 VDC) (not with relay, not with...
  • Page 149 4.2 Accessories and spare parts 149 Order code Characteristic Channel 1 Unit % RH/Min/Max °C/Min/Max °F/Min/Max °Ctd/Min/Max °Ftd/Min/Max g/kg /Min/Max gr/lb /Min/Max /Min/Max gr/ft /Min/Max /min/max °C /Min/Max (wet bulb) °F /Min/Max (wet bulb) kJ/kg /Min/Max (enthalpy) hPa /Min/Max (water vapour partial pressure) inch H2O/Min/Max (water vapour partial pressure) % Vol / min / max Channel 2 Unit...
  • Page 150 150 4.2 Accessories and spare parts Order code Characteristic % Vol / min / max Relay without relay 4 relay outputs, limit value monitoring 4 relay outputs, channel 1 limit values and collective alarm Optional 3rd analog output no optional 3rd analog output % RH/Min/Max °C/Min/Max °F/Min/Max...
  • Page 151 4.2 Accessories and spare parts 151 Order code Characteristic Instruction manual languages German/English instruction manual French/English instruction manual Spanish/English instruction manual Italian/English instruction manual Dutch/English instruction manual Japanese/English instruction manual Chinese/English instruction manual...

  • Page 152: Ordering Options For Testo 6610 Probes (0555 6610)

    Cable length N 00 Without cable (testo 6611) N 01 1 m cable length (testo 6613, 6614, 6615, 6617) N 02 2 m cable length (testo 6613, 6614, 6615, 6617) N 05 5 m cable length (testo 6613, 6614, 6615, 6617)
  • Page 153 4.2 Accessories and spare parts 153 Order code Characteristic P 50 Probe length approx. 500 mm (testo 6612, 6613, 6614, 6615, 6617) P 80 Probe length approx. 800 mm (testo 6612, 6613)
  • Page 154 Testo SE & Co. KGaA Celsiusstr. 2 79822 Titisee-Neustadt Germany Tel.: +49 7653 681-0 E-Mail: info@testo.de www.testo.com 0970 6681 en 05 Vol2...

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