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Instruction Manual
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TESTO 6651, 6600 Instruction Manual

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Page 1
testo 6651 Ethernet · Humidity transmitters
testo 6600 · Probes
P2A software · Parameterizing, adjusting and analyzing
software
Instruction manual Volume 1 en
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Safety and the environment
Safety and the environment
Avoiding electrical hazards
► Never use the instrument and connected probes to measure on or near
live parts!
► Damaged mains cables must only be replaced by authorized personnel.
► Only have the transmitter wired and connected by authorized personnel
with the voltage disconnected.
► You must always comply with the regulations applicable in your country
to the opening and repair of electrical equipment.
Avoiding personal injury/damage to equipment
► Installation, setting and calibration work must only be carried out by
qualified and authorized personnel!
► Only open the instrument when this is expressly described in the
instruction manual for installation, maintenance or repair purposes.
► Observe the permissible storage, transport and operating temperatures.
► Never store or operate the product with solvents and do not use any
desiccants.
► Do not use the instrument for control purposes at the same time as
operating or servicing the transmitter.
► Only operate the product properly, for its intended purpose and within the
parameters specified in the technical data. Do not use force.
► Carry out only the maintenance and repair work that is described in the
documentation. Follow the prescribed steps when doing so. Use only OEM spare parts from Testo.
Any additional work must only be carried out by authorized personnel. Otherwise Testo will not accept any responsibility for the proper functioning of the instrument after repair and for the validity of certifications.
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.
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About this document
3
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.
► The following conventions are followed in this document:
Character/ display:
Explanation/example
With the signal word Warning!:
Warns against hazards which could result in serious physical injury if the precautionary measures indicated are not taken, e.g.:
De-energize the mains connection before connecting the transmitter!
With the signal word Caution!:
Warns against hazards which could result in minor physical injury or damage to equipment if the precautionary measures indicated are not taken, e.g.:
Observe the permissible operating temperature!
Important information, e.g.:
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.
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About this document
1
Steps are numbered if a certain sequence of actions must be followed, e.g.:
1 Loosen and remove housing screws. 2 Remove the upper part of housing.
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" results in ....
Bold type
Elements of the program interface or instrument display, e.g.:
The instrument designation appears in the instrument/parameter file list.
Select Main Menu Channel 1 and confirm with SET.
…>…
Functions/paths within a menu, e.g.:
Start > All Programmes > Testo > Transmitter Software.
[ ]
Buttons which start an action, e.g.:
Confirm the software key with [OK].
CAPITAL LETTERS
Keys on the instrument or keypad, e.g.:
Press ESC.
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Contents
5
Contents
1 TRANSMITTER............................................................................................ 7
1.1 Specifications........................................................................................... 7
1.1.1 Functions and use.......................................................................7
1.1.2 Scope of delivery ........................................................................7
1.1.3 Accessories................................................................................. 8
1.1.4 Technical data.............................................................................8
1.1.5 Dimensions ............................................................................... 10
1.2 Product description ................................................................................11
1.2.1 At a glance ................................................................................11
1.2.2 Usable probes...........................................................................12
1.2.3 Display and keypad...................................................................13
1.2.4 Service interface .......................................................................13
1.2.5 Relay board (option) .................................................................13
1.2.6 Analog outputs ..........................................................................13
1.2.7 Parameters ...............................................................................14
1.2.8 Scaling ...................................................................................... 14
1.2.9 Alarm handling ..........................................................................16
1.3 Commissioning ......................................................................................17
1.3.1 Insert Ethernet module (Order no. 0554 6656)......................... 17
1.3.2 Assembling the instrument .......................................................19
1.3.3 Connecting the instrument........................................................ 22
1.3.4 Ethernet communication ...........................................................35
1.3.5 Adjusting the instrument ........................................................... 53
1.4 Operation ............................................................................................... 60
1.4.1 Relationship between user menu and mini-DIN socket is active
..................................................................................................60
1.4.2 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
1.5.3 Transmitter error messages...................................................... 79
1.5.4 Handling alarm messages ........................................................ 80
1.5.5 Namur fault conditions ..............................................................81
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Contents
1.6
Maintenance and cleaning..................................................................... 82
1.6.1 Maintaining the instrument........................................................ 82
1.6.2 Cleaning the instrument............................................................ 82
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testo 6651 Ethernet - 1.1 Specifications
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1 Transmitter
1.1 Specifications
1.1.1 Functions and use
The testo 6651 humidity transmitter is used in conjunction with plug-in, adjusted probes from the testo 6600 range.
Please refer to volume 2, chapter 2, page 88 for information about commissioning, operating and maintaining the testo 6600 probe.
The testo 6651 humidity transmitter is suitable for the following applications, for example:
Process instrumentation Clean rooms Test benches Drying processes Production and storage air quality Complex room climate applications.
In addition to the signal transmission of the readings to a control unit via analog outputs, the measurement data can simultaneously be recorded, documented and visualized via 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 Rear panel bracket Ethernet module CD-ROM with catalogue files (PDF) and P2A update (this can only be
used in conjunction with the P2A software, which has to be ordered separately).
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testo 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 website at www.testo.com.
1.1.4 Technical data
Parameters
- Humidity (% RH/°Ctd/°Ftd)
- Temperature (°C/°F)
Measuring range
- Depends on probe
Accuracy
- Depends on probe
Resolution
- 0.1 % RH or 0.1 °C/0.1 °F
Meas. cycle
- 1/s
Interface
- Mini-DIN for P2A software
(parameterizing and adjusting software) and handheld testo 400/650
Voltage supply
- 4-wire (separate signal and supply
lines): 20 - 30 V AC/DC, 300 mA power consumption
- 500 Ω (power output)
Analog output
- 0 ... 1 V ± 1.5 mV (4-wire) or
- 0 ... 5 V ± 7,5 mV (4-wire) or
- 0 ... 10 V ± 15 mV (4-wire) or
- 0 ... 20 mA ± 0.03 mA (4-wire) or
- 4 ... 20 mA ± 0.03 mA (4-wire)
Resolution of analog output
- 12 bit
Relay
- 4 relays, 250 V AC/DC, 3 A
(optional)
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testo 6651 - 1.1 Specifications
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Display
- 2-line LCD with plain text line
(optional)
Housing operating temperature
- - 40 ... 70 °C/-40 to +158 °F, with
display from 0 - 50 °C / 32 to +122 °F
- With integrated relay: -40 - +60 °C
Operating humidity
- 0...100 %rF
Storage temperature
- - 40 ... 80 °C/-40 to +176 °F
Housing, weight
- Plastic, 675 g/1.49 lb
- Ethernet module: 0.610 kg
Protection class
- IP 65 only if the transmitter is
wired properly (closed cable entries), Ethernet connector, Harting PushPull connector and humidity probe are inserted and/or sealing plug is inserted.
Directives, standards and tests
- EC Directive: 2004/108/EC
- DIN 14644-4
- EN 61000-6-2 interference
immunity
- EN 61000-6-3 interference
emission
- EN 61326-1+A1+A2
Ethernet module
- Interface:
1 x mini DIN 1 x RJ45 (Ethernet 10 BatesT/100 BaseTX
- LED:
2 x green
Warranty
- Duration: 2 years
- Warranty conditions: See web page
www.testo.com/warranty
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testo 6651 - 1.1 Specifications
1.1.5 Dimensions
Dimensions in mm a b
With M 20 cable couplings 144 147
With NPT cable couplings 144 144
With M plug-in connections 143
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testo 6651 - 1.2 Product description
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1.2 Product description
1.2.1 At a glance
1 Keys (with optional display) 2 Service flap screw connection
(self-locking, 2x) 3 Display (optional) 4 Service flap 5 M 16 x 1.5 screw connection*,
e.g. analog outputs 6 M 16 x 1.5 screw connection*,
e.g. voltage supply 7 Eyelet for measuring point
panel 8 M 20 x 1.5 screw connection*,
e.g. relay R 3 and R 4 9 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 connections are available
A Ethernet module
1 DIP switch 2 Ethernet port 3 LED: LAN connection status 4 LED: Supply
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testo 6651 - 1.2 Product description
5 Housing screws (4x) 6 Socket for probe connector 7 Hole for fastening to rear
panel bracket (M3 x 6 screw)
8 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; accuracy to ± 1.7 % RH;
temperature range -20 °C to +70 °C/-4 to +158 °F, Sensor plugged
testo 6602 0555 6600-L02 Duct probe version; accuracy to ± 1.7 % RH;
temperature range -20 °C to +70 °C/-4 to +158 °F, Sensor plugged
testo 6603 0555 6600-L03 Duct probe version; accuracy to ± 1.7 % RH;
temperature range -30 °C to +120°C/-22 to +248 °F, Sensor plugged
testo 6604 0555 6600-L04 Cable probe version; accuracy to ± 1.7 % RH;
temperature range -20 °C to +70 °C/-4 to +158 °F, Sensor plugged
testo 6605 0555 6600-L05 Cable probe version; accuracy to ± 1.7 % RH;
temperature range -30 °C to +120°C/-22 to +248 °F, Sensor plugged
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testo 6651 - 1.2 Product description
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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).
The brightness and contrast of the display and the background lighting (permanent or off) can be changed via the user menu or the P2A software.
1.2.4 Service interface
Behind the service flap is the parameterizing socket (mini-DIN) as an interface to the P2A software or Testo handheld instrument (testo 400/testo 650).
1.2.5 Relay board (option)
This has a floating switch capacity of 250 V AC/3 A. The switching limits and hysteresis as well as the function as relay for the collective alarm can be set via the display or the P2A software. Further features include:
Function of changeover contacts (NC/NO contacts) freely selectable 12 terminals for a total of 4 relays.
If no relays are available, settings for monitoring limit values or alarms can still be controlled via the display.
Only have the transmitter wired and connected by authorized personnel with the voltage disconnected.
1.2.6 Analog outputs
For analog outputs, the testo 6651 has either
2 current outputs of 4 to 20 mA (2-wire) / 0 to 20 mA (4-wire) / 4 to
20 mA (4-wire) or
2 voltage outputs of 0 to 1 V/0 to 5 V/0 to 10 V (4-wire).
In 2-wire operation, channel 1 is used for the supply. The two channels are galvanically isolated in both 2- and 4-wire operation.
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testo 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
standard)
Temperature °C and °F Dewpoint in °Ctd and °Ftd Absolute humidity in g/m³
*It is possible that condensation appears as of a displayed humidity starting from 70 % and is shown on the display. This unit is used in meteorology, for example. According to the WMO, the Magnus coefficient is used for sub-cooled water in the calculation of relative humidity.
Calculated humidity variables correspond to the medium of air. With other gases/gas compositions, deviations may occur, e.g. with the enthalpy
1.2.8 Scaling
There are three types of min./max. values:
1 The measuring range
The maximum sensor performance is in this range. Values outside of the measuring range are displayed via messages, for example. Measuring range, see table (below).
2 Standard scaling
The output signals are assigned to this measuring range as standard:
- during delivery if no entries are made in the order code
- after exchanging the unit, the measuring range recorded in the instrument is applied as standard.
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testo 6651 - 1.2 Product description
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The transmitter even retains its scaling with the voltage disconnected.
Measuring range, see table (below).
3 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. and MAX. value of the standard scaling
(Max. value of standard) + (50 % of X)
(Min. value of standard) - (50 % of X)
- It is thus possible to scale beyond the measuring range, e.g. for the adjustment of the scaling limits to standard values of a PLC. However, the physical measurement range limits are the deciding factor when defining alarms.
Parameter Unit probe
Measuring
range
physical at
1013 hPa
Standard
scaling
MUF
measuring
range
MIN MAX MIN MAX
Temperature °C 6601, 6602, 6604
-20
+70
-20 +70
°F 6601, 6602, 6604
-4
+158
-4
+158
°C 6603, 6605
-30 +120
-30 +120
°F 6603, 6605
-22 +248
-22 +248
relative humidity % RH, 0 +100
0
+100
WMO relative humidity % RH 0 +100
0
+100
Dewpoint °Ctd 6601, 6602, 6604
-20
+70
-80 +100
at 25 °C Tmax °Ftd 6601, 6602, 6604
-4
+158 -112 +212
°Ctd 6603, 6605
-20 +100
-80 +100
°Ftd 6603, 6605
-4 +212 -112 +212
Absolute humidity g/m3 all probes
0
600
0
2000
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testo 6651 - 1.2 Product description
1.2.9 Alarm handling
For upper and lower alarm limits, individual alarms as well as collective alarms can be specified. If the collective alarm function is activated, an alarm is triggered as soon as the alarm limit of an alarm is exceeded, if this alarm is assigned to the collective alarm.
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.
If the reading reverts to more than a specified hysteresis below or above the limit value, the alarm is cancelled.
In addition, information about the occurrence of error/status messages can be provided by means of a collective alarm relay (see chapter 1.5, page 76).
If multiple alarm messages are activated at the same time, the last alarm is shown. If the alarm is cancelled again, the previous messages are no longer shown.
Example
If the condensation of the probe begins, the "Condensation" message appears on the display and the "Start" status display. If the condensation is over, the status display changes from "Start" to "End".
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testo 6651 - 1.3 Commissioning
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1.3 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.
1 Loosen screw connection (1) of service flap and open the flap.
2 Loosen and remove housing screws (2).
3 Remove upper part of housing (3) and place on a clean surface.
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testo 6651 - 1.3 Commissioning
4 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.
5 Set on upper part of instrument (5) and fix in place using housing
screws (2).
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testo 6651 - 1.3 Commissioning
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1.3.2 Assembling the instrument
1.3.2.1 Wall mounting (for testo 6601/6604/6605 probes)
Attaching rear panel bracket
1 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).
2 Hold rear panel bracket in assembly position and mark the three drill
holes.
3 Drill three holes ( 5 mm) and insert dowels where necessary.
4 Screw on rear panel bracket.
Remember that the clamping brackets (1) must face the wall.
1
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testo 6651 - 1.3 Commissioning
Fastening instrument to rear panel bracket
1 Slide plastic bracket (2) on the back of instrument onto rear panel
bracket until it engages (see arrows).
2 Insert screw (4) through hole (3) and screw into rear panel bracket.
3 Insert probe connector (5) into socket until it engages.
5
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testo 6651 - 1.3 Commissioning
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1.3.2.2 Duct mounting (for testo 6602/6603 probes)
1 Hold wall/duct bracket (order no. 0554 6651) (6) against duct wall (8)
and mark drill holes for wall/duct bracket and probe shaft.
2 Drill a hole ( 12.5 mm) in the duct wall to feed through the probe
shaft.
3 Fasten wall/duct bracket (6) to duct wall with screws (5).
4 Push probe shaft (9) with filter (10) through the middle hole of the
mounting bracket.
The wall/duct bracket (6) has an O-ring (7) to seal it against the duct. Feed the probe shaft (9) carefully through the wall/duct bracket so that the O-ring is not damaged.
5 Fix the correct position of the probe shaft (8) with screw (11) and mark
(insert probe shaft as far as possible).
6 Slide plastic bracket (2) on the back of the transmitter onto bracket (3,
4) until it engages.
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testo 6651 - 1.3 Commissioning
Take the weight of the transmitter into account. Ensure that the brackets (4, 6) are fastened securely.
7 Insert screw (1) through hole on the top of the instrument and screw
into bracket (3).
8 Insert probe connector (12) into socket until it engages.
1.3.3 Connecting the instrument
Opening the instrument
1 Loosen screw connection (1) of service flap and open the flap.
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testo 6651 - 1.3 Commissioning
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2 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.
3 Remove upper part of housing from lower part (3) and place on a
clean surface.
4 Remove Ethernet module (A) from lower part of housing (4) and also
place on a clean surface.
Warning!
Electrical voltage.
Danger of injury! De-energize the mains connection before connecting the transmitter!
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testo 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
1 Lower part of housing 2 Relay board (option) 3 Relay terminals 4 Insulating trough for relay
board
5 Terminal strip for voltage
supply and analog outputs
6 Terminal board 7 M 16 x 1.5 screw connection* 8 Eyelet for measuring point
panel
9 M 20 x 1.5 screw connection*
* Alternatively, NPT cable coupling
or M plug-in connection
The following description of the terminals refer to this overview and its numbering.
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testo 6651 Ethernet - 1.3 Commissioning
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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).
1 Feed cable with voltage supply and analog signal lines through
opened M 16 x 1.5 screw connection (item (7) in Overview of terminals, chapter 1.3.3.1, page 24).
2 Strip the cable ends, clamp wire end ferrules on and screw down onto
voltage terminals.
3 Close M 16 x 1.5 screw connection (item (7) in Overview of terminals,
chapter 1.3.3.1, page 24).
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)
0 V
20 to 30 V AC/DC
2 channels 0 to 20 mA/ 4 to 20 mA/ max. load per 500
0 to 1 V/0 to 5 V/0 to 10 V
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testo 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.  An OFF switch must be installed in an easily accessible
position close by and be marked as such.
4 Feed connection cables of the two channels through opened M 16 x
1.5 screw connection (item (7) of Overview of terminals, chapter
1.3.3.1, page 24).
5 Strip the cable ends, clamp wire end ferrules on and screw to channel
terminals as shown in diagram.
6 Close M 16 x 1.5 screw connection (item (7) in Overview of terminals,
chapter 1.3.3.1, page 24).
1.3.3.3 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 1.3.3.1, page 24)
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.
Using M screw connection
1 Feed connection cables for the relays through opened M 20 x 1.5
screw connection (item (10) of Overview of terminals, chapter 1.3.3.1, page 24).
2 Strip cable ends and clamp on wire end ferrules.
3 Connect relays according to chosen function (NC/NO) (see diagrams
below; relay 1 is shown as an example of a connection).
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testo 6651 Ethernet - 1.3 Commissioning
27
Using plug-in connections (optional)
Only insert or disconnect the plug-in connection when the voltage is disconnected.
1 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.
Connection note
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testo 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).
In order to protect from electrical shock if the wire severs
or falls out, 3 wires must always be bound together with a cable tie (3).
The insulation of the cable must be fed at least 5 mm (4)
into the tray.
Use of relay as NC contact (NC = normally closed)
The busy light (alarm/status light) is permanently on until the relay opens or the circuit is interrupted. This circuit can therefore be used to monitor the functionality of the alarm circuit, as a cable break, for instance, is indicated by the busy light going off.
250 V AC/DC, 3 A
Alarm/status light (example of installation)
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testo 6651 Ethernet - 1.3 Commissioning
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Use of relay as NO contact (NO = normally open)
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.
2 Close M 20 x 1.5 screw connection (item (9) of Overview of terminals,
chapter 1.3.3.1, page 24).
250 V AC/DC, 3 A
Alarm/status light
(
example of installation
)
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testo 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. 3 and 4
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
Pin Assignment.
1 V 24 -
2 V 24 +
3 + Ch 1
4 - Ch 1
5 PE
Transmitter housing
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testo 6651 Ethernet - 1.3 Commissioning
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M12 plug-in connection (5-pin) connector (2)
Pin Assignment.
1 - Ch 2
2 + Ch 2
3 + Ch 3
4 - Ch 3
5 PE
1.3.3.5 Setting the Ethernet module
Using a DIP switch the Ethernet module can be switched between two main functions:
Saveris subscriber function (DIP switch No. 1 = on)
testo 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" (Saveris setting).
The testo 6651 must be disconnected from the Ethernet network.
1 Open transmitter (see Section Connecting the instrument, chapter
1.3.3 page 22).
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testo 6651 Ethernet - 1.3 Commissioning
2 Set the DIP switch no. 1 (1) on the Ethernet module.
In the illustration: DIP switch no. 1 off, DIP switch no. 2 on
3 Set Ethernet module on lower part of housing (see arrow).
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testo 6651 Ethernet - 1.3 Commissioning
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4 For the configuration of the Ethernet module, see following chapter.
5 If you do not wish to perform a configuration, close the transmitter.
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testo 6651 Ethernet - 1.3 Commissioning
1.3.3.6 Closing the instrument
1 Place Ethernet module (A) on lower part of instrument (1).
2 Set on upper part of instrument (2) and fix in place using housing
screws (3).
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testo 6651 Ethernet - 1.3 Commissioning
35
3 Close the service flap and tighten screws (4).
4 Connect the Ethernet network cable to the transmitter via the Ethernet
socket (5).
1.3.4 Ethernet communication
1.3.4.1 Types of operation
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.
The network cable may not be connected directly to the telephone network (ISDN).
In order to guarantee the IP protection, an RJ 2.5 Harting Push-Pull plug must be used.
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1.3.4.3 LED status displays
Characteristic LED 1 LED 2
Colour green green
Status display for Voltage supply LAN connection
Status: off No voltage supply No LAN connection
Status: stays on Voltage supply present
LAN connection
present
Status: flashes
Data transfer
1.3.4.4 testo 6651 as Saveris subscriber
Set the IP address
Network cable must be connected.
The IP address of the transmitter can either be set via the P2A software (transmitter accessories) or via the configuration menu of testo Saveris
TM
(testo SaverisTM Startup Wizard).
Set IP address with the P2A software (see Chapter 117) or with the testo
Saveris
TM
Startup Wizard (see instruction manual).
Using Saveris
Start Saveris software (see instruction manual Measurement data
monitoring with testo Saveris)
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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.
1. [Start] | All Programs | Testo |
• Select Saveris Professional Client
(full version).
The entry is available if Saveris Professional Client is installed
• Select Saveris Viewer
(limited functionality).
The entry is available if Saveris Professional Viewer is installed
- - The Testo Saveris software program window is opened with the
Select project dialogue.
If the software will not start, check whether the testo
tdassvcs service is started in the service management
of the operating system and restart it, if needed.
2. Select the
• Only active projects option if the data from a running project should be opened
• All projects option if the data from a completed project should be opened.
3. In the tree structure, select the project that is to be opened.
4. Confirm with [OK].
1 The Testo Saveris software program window is shown with the
selected data record in the foreground.
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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 decoded via an Internet connection with the aid of a programming/script language
Interface
The communication takes place according to the client/server principle, whereby the Ethernet module takes on the role of the server:
The XML interface will be approached via a URL. The URL consists of the IP address of the Ethernet module, the path for the XML document and, depending on the URL, with a clearly defined parameter. If a parameter is missing or an incorrect value is transferred, the Ethernet module sends back a simple error message.
Example:
IP address = 254.169.100.100 URL for serialnumber.xml: http://254.169.100.100/data/getserialnumber
If a parameter is required, a “?” (question mark) is always in the first place after the URL
then the parameter is transferred to the common query string
form (name=value).
Example:
IP address = 254.169.100.100 URL for / identification.xml: http://254.169.100.100/data/getidentification?param=0 (compare table xml codes)
After calling up the compound URL, if everything was correct, an XML document is returned. With faulty parameters a simple HTML answer comes that points out the reason that an XML answer could not be given.
If an XML document is to be loaded on the server, access is provided by means of a POST request
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Example of an upload via the program wget: IP address = 254.169.100.100 URL for / deviceident.xml: H:/wget/wget-complete-stable/wget—post-file= C:/usersettings.xml 193.168.1.5/config/setusersettings
The Ethernet module supports reading out of
 Readings  Instrument type (testo 6651)  Firmware date and version (testo 6651)  Status and status messages (testo 6651)  Alarm messages (testo 6651)  Service hour counter (testo 6651 and probe)
as well as the reading and writing of the:
Adjustment data (testo 6651)  Configuration data of analog outputs (testo 6651)  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
URL Description Parameter Answer (see Appendix)
/data/getserialnumber
Read off serial number of connected transmitter
serialnumber.xml
param=0 (for transmitter)
/data/getidentification
Read off type of connected transmitter/ probe
param=1 (for probe)
identification.xml
/data/getversion
Read off firmware version of connected transmitter
version.xml
/data/getfirmwaredate
Read off firmware date of connected transmitter
firmwaredate.xml
/data/getonlinevalue
Read off online values of connected transmitter
onlinevalue.xml
/data/getviewchannels
Read off view channels of connected transmitter
viewchannels.xml
/data/getstatus
Read off status of connected transmitter
status.xml
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URL Description Parameter Answer (see Appendix)
/data/getlaststatusmessage
Read off last status message of connected transmitter
laststatusmessage.xml
param=0 (for transmitter)
/config/gethourscount
Read off service hour counter of transmitter or probe
param=1 (for probe)
hourscount.xml
/config/getusersettings
Read off settings of transmitter
usersettings.xml
param=0 (adjustment set 1)
param=1 (adjustment set 2)
/config/getcalibration
Read off adjustment data of transmitter
param=2 (adjustment set 3)
calibration.xml
param=0 (relay 1) param=1 (relay 2)
param=2 (relay 3)
/config/getreldefinition
Read off relay information of transmitter
param=3 (relay 4)
reldefinition.xml
/config/getheatertime
Read off sensor heating information
heatertime.xml
/config/getoptions
Read off options of transmitter
options.xml
/config/getcollectivealarm
Read off alarm messages of transmitter
collectivealarm.xml
Upload XML documents
URL Description Parameter Post
Answer (see
Appendix)
/config/setusersettings
Perform settings of testo 6651
usersettings usersettings.xml
param=0 (adjustment set 1) param=1 (adjustment set 2)
/config/setcalibration
Set adjustment data of transmitter
param=2 (adjustment set 3)
calibration.xml
calibration.xml
param=0 (relay 1) param=1 (relay 2) param=2 (relay 3)
/config/setreldefinition
Set relay information of transmitter
param=3 (relay 4)
reldefinition.xml
reldefinition.xml
/config/setheatertime
Set sensor heating information
heatertime.xml
heatertime.xml
/config/setoptions
Set options of transmitter
options.xml
options.xml
/action/setresettm
Not yet implemented
resettm.xml
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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
XML tag Description Type
calibration_data
Base element. Contains the child elements unit, attenuation, cal_reserved, cal_offset, cal_scale.
Unit See general elements attenuation Damping (0 – 15) Numerical, whole number cal_offset Offset Numerical, decimal number
cal_scale
Parent element. Contains the child elements cal_minscale, cal_maxscale
cal_minscale Scaling value Numerical, decimal number cal_maxscale Scaling value Numerical, decimal number
Elements in collectivealarm.xml
XML tag Description Type
colalarmtable
Base element. Contains the child elements alarm_numbers, alarm
alarm_numbers Number of alarm messages Numerical, whole number alarm
Parent element. Contains the child elements alarm_event, alarm_state
alarm_event Type of alarm ASCII
alarm_state
Status of the alarm 0 = alarm inactive 1 = alarm active
Numerical, whole number
Elements in deviceident.xml
XML tag Description Type
ident
Base element. Contains the child element device_id
device_id ID of transmitter or probe Numerical, whole number
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Elements in firmwaredate.xml
XML tag Description Type
firmware_date
Base element. Contains the child elements year, month, day
year Year Numerical, whole number month Month Numerical, whole number day Day Numerical, whole number
Elements in heatertime.xml
XML tag Description Type
heatertime
Base element. Contains the child element heatertimeoff
heatertimeoff Time sensor heating off in min Numerical, whole number
Elements in hourscount.xml
XML tag Description Type
hourcount Base element. Contains the child
element hours
hours Service hour counter in h Numerical, whole number
Elements in identification.xml
XML tag Description Type
ident
Base element. Contains the child element device_id
device_id Transmitter type Numerical, whole number
Elements in laststatusmessage.xml
XML tag Description Type
mufmsg Base element. Contains the child
elements msg, sn, hours
msg Status message ASCII sn Serial number ASCII, 8 characters hours Service hour counter in h Numerical, whole number
Elements in onlinevalue.xml
XML tag Description Type
online_values
Base element. Contains the child elements number_values, measurement_value
number_values See general elements measurement_value See general elements
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Elements in options.xml
XML tag Description Type
options
Base element. Contains the child elements device_options, production_options, country_option, option_counter
device_options See device_options description Numerical, whole number production_options
See production_options description
Numerical, whole number
Elements in reldefinition.xml
XML tag Description Type
relay_data
Base element. Contains the child elements relay_channel, relay_number, relay_status, sw_point_character, sw_point_value, hysteresis_value
relay_channel
Measurement channel linked to the relay
Numerical, whole number
relay_number
Relay number (0 – 2) Numerical, whole
number
relay_status
Status of relay 0 = off 1 = on
Numerical, whole number
sw_point_charact
Switch point: Switch point: 0 = low-limit monitoring 1 = high-limit monitoring
Numerical, whole number
sw_point_value
Switch point Numerical, decimal
number
hysteresis_value
Hysteresis Numerical, decimal
number
Elements in serialnumber.xml
XML tag Description Type
serialnumber Base element. Contains the child
element number
number Serial number ASCII, 8 characters
Elements in status.xml
XML tag Description Type
mufstatus
Base element. Contains the child elements statemsg, staterel, statecounter
statemsg
Status message See statemsg description
Numerical, whole number
staterel
Status relay See staterel description
Numerical, whole number
statecounter
Counter Numerical, whole
number
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Elements in usersettings.xml
XML tag Description Type
usersettings
Base element. Contains the child elements pressure, h2o2, setting_display, backlight, contrast, language, disp_msg, h2o2_prozess
pressure Absolute pressure Numerical, decimal number h2o2 H2O2 value Numerical, decimal number
setting_display
Auto OFF background lighting 0 -> background lighting auto OFF 1 -> background lighting stays on
Numerical, whole number
backlight
Brightness of background lighting 0 – 9 (0 = off, 9 = max.)
Numerical, whole number
contrast
Display contrast 0 – 9 (0 = min., 9 = max.)
Numerical, whole number
language
Language 0 ->GERMAN 1->ENGLISH 2->FRENCH 3->SPANISH 4->ITALIAN 5 ->JAPANESE
Numerical, whole number
disp_msg
Status messages display 0 = off 1 = on
Numerical, whole number
h2o2_prozess
H2O2 process 0 = via H2O2 water 1 = process with evaporated H2O2
Numerical, whole number
Elements in version.xml
XML tag Description Type
firmware_version
Base element. Contains the child element version
version Firmware version: ASCII, 6 characters
Elements in viewchannels.xml
XML tag Description Type
view_channels
Base element. Contains the child elements number_values, view_channel
number_values See general elements
view_channel
Parent element. Contains the child elements channel_info, measurement_value, meas_status
channel_info
Parent element. Contains the child elements connector_info, channel_type
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XML tag Description Type
measurement_value See general elements meas_status
Parent element. Contains the child elements min, max, mean
connector_info Channel (transmitter/probe) ASCII channel_type Parameter details ASCII min. Minimum reading Numerical, decimal number max. Maximum reading Numerical, decimal number mean Mean value Numerical, decimal number
production_options description
Content of production_options is a double word type number (32 bit). The individual hardware options are bit-coded here.
Xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx │ ││││ │││└ 0 = 2 analog outputs, │ ││││ │││ 1 = 3 analog outputs, │ ││││ └└└─ 0 = 4 – 20 mA │ ││││ 1 = 0 – 20 mA │ ││││ 2 = 0 – 1 V │ ││││ 3 = 0 – 5 V
│ ││││ 4 = 0 – 10 V │ ││││ 5 = EX 4 – 20 mA │ └└└└───── free └────────── 0 = 2 wires, 1 = 4 wires
device_options description
Content of device_options is a double word type number (32 bit). The individual instrument options are bit-coded here.
Xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx ││││ │││└ 0 = no display, ││││ │││ 1 = display present ││││ ││└─ 0 = no relay present, ││││ ││ 1 = relay present ││││ │└── 0 = no Profibus ││││ │ 1 = Profibus installed
│└└└─└── free └────────── 0 = probe is invalid,
1= probe is valid
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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 ││││ │││└- 1 = transmitter error ││││ ││└─ 1 = transmitter warning ││││ │││└- 1 = transmitter information ││││ └─── free │││└──── 1 = probe error ││└───── 1 = probe warning
│└────── 1 = probe information └─────── free
staterel description
Content of staterel is a double word type number (32 bit). The individual relay states are bit-coded here.
Xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx ││└ 0 = relay 1 is not set, ││ 1 = relay 1 is set │└─ 0 = relay 2 is not set, │ 1 = relay 2 is set, └── 0 = relay 3 is not set, 1 = relay 3 is set,
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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> <alarm> <alarm_event>xxxx</alarm_event> <alarm_state>0</alarm_state> </alarm> <alarm> <alarm_event>xxxx</alarm_event> <alarm_state>0</alarm_state> </alarm> <alarm> <alarm_event>xxxx</alarm_event> <alarm_state>0</alarm_state> </alarm> </colalarmtable>
deviceident.xml <?xml version=”1.0” encoding=”UTF-8” ?> <ident> <device_id>31</device_id> </ident>
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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>
laststatusmessage.xml <?xml version=”1.0” encoding=”UTF-8” ?> <mufmsg> <msg>xxxx</msg> <serialnumber>00123456</serialnumber> <hours>163</hours> </mufmsg>
onlinevalue.xml <?xml version="1.0" encoding="UTF-8" ?> <online_values> <number_values>3</number_values> <measurement_value> <value>23.7</value> <unit>°C</unit>
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</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" encoding="UTF-8" ?> <serialnumber> <number>0012345</number> </serialnumber>
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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)>
<!ELEMENT channel_info (connector_info, channel_type)> <!ELEMENT connector_info (#PCDATA)> <!ELEMENT channel_type (#PCDATA)>
<!ELEMENT online_values (number_values, (measurement_value)*)> <!ELEMENT number_values (#PCDATA)> <!ELEMENT measurement_value (value, unit)> <!ELEMENT value (#PCDATA)> <!ELEMENT unit (#PCDATA)>
<!ELEMENT view_channels (number_values, (view_channel)*)> <!ELEMENT view_channel (channel_info, measurement_value, meas_status)> <!ELEMENT meas_status (min, max, mean)> <!ELEMENT min (#PCDATA)> <!ELEMENT max (#PCDATA)> <!ELEMENT mean (#PCDATA)>
<!ELEMENT hourcount (hours)> <!ELEMENT hours (#PCDATA)>
<!ELEMENT usersettings (pressure, h2o2, setting_display, backlight, contrast, language, disp_msg, h2o2_prozess)> <!ELEMENT pressure (#PCDATA)> <!ELEMENT h2o2 (#PCDATA)> <!ELEMENT setting_display (#PCDATA)> <!ELEMENT backlight (#PCDATA)>
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<!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)>
<!ELEMENT relay_data (relay_channel, relay_number, relay_status, sw_point_character, sw_point_value, hysteresis_value)> <!ELEMENT relay_channel (#PCDATA)> <!ELEMENT relay_number (#PCDATA)> <!ELEMENT relay_status (#PCDATA)> <!ELEMENT sw_point_character (#PCDATA)> <!ELEMENT sw_point_value (#PCDATA)> <!ELEMENT hysteresis_value (#PCDATA)>
<!ELEMENT heatertime (heatertimeoff)> <!ELEMENT heatertimeoff (#PCDATA)>
<!ELEMENT options (device_options, production_options)> <!ELEMENT device_options (#PCDATA)> <!ELEMENT production_options (#PCDATA)>
<!ELEMENT colalarmtable (alarm_numbers, (alarm)*)> <!ELEMENT alarm_numbers (#PCDATA)> <!ELEMENT alarm (alarm_event, alarm_state)> <!ELEMENT alarm_event (#PCDATA)> <!ELEMENT alarm_state (#PCDATA)>
<!ELEMENT mufstatus (statemsg, staterel, statecounter, reserved)> <!ELEMENT statemsg (#PCDATA)> <!ELEMENT staterel (#PCDATA)> <!ELEMENT statecounter (#PCDATA)>
<!ELEMENT mufmsg (msg, sn, hours)> <!ELEMENT msg (#PCDATA)> <!ELEMENT sn (#PCDATA)> <!ELEMENT hours (#PCDATA)>
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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" encoding="UTF-8" ?> <view_channels> <number_values>2</number_values> <view_channel> <channel_info> <connector_info>Probe</connector_info> <channel_type>Temperature</channel_type> </channel_info> <measurement_value> <value>23.7</value> <unit>°C</unit> </measurement_value> <meas_status> <min>23.6</min> <max>23.7</max>
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<mean>23.7</mean> </meas_status> </view_channel> <view_channel> <channel_info> <connector_info>Probe</connector_info> <channel_type>Humidity</channel_type> </channel_info> <measurement_value> <value>42.5</value> <unit>%rF</unit> </measurement_value> <meas_status> <min>41.7</min> <max>43.0</max> <mean>43.0</mean> </meas_status> </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).
1-point adjustment 2-point adjustment Analog adjustment
Adjustment via
- testo 400/650 handheld
instrument with adjustment adapter
- P2A software
- User menu
Adjustment 11.3 % RH and
75.3 % RH via
- Adjustment keys (1, 2)
- P2A software
Adjustment 20 % rH and 80 % rH via
- User menu
Adjustment using a precise multimeter and transmission of analog reference value in
- P2A software or
- User menu
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Either the 1-point adjustment or 2-point adjustment is suitable for adjusting the sensor signal - 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
1 LED 2 Contact ch. 1 + 3 Contact ch. 1 ­4 Adjust key 11.3 % 5 Service interface 6 Adjust key 75,3 % 7 Contact ch. 2 + 8 Contact ch. 2 -
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1.3.5.2 1-point adjustment (offset)
In the 1-point adjustment, the reading at the working point is raised to the reference value so that there is no longer any deviation in the working point. 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.
The advantage of the 1-point adjustment is the good measuring result in the working range. But the further away the measurement is from the working point, the greater the deviation can become. The 1-point adjustment should therefore only be used for a relatively narrow measuring range (working range), e.g. clean room applications, air conditioning applications for storage and similar.
The 1-point adjustment can be performed
via the user menu (see chapter 1.4.6.8, page 72) or via the P2A software (see volume 2, Chapter 3, page 113) or directly by means of a Testo handheld instrument (testo 400/650) (see
description of how to proceed below).
Please note that the 1-point adjustment is generally performed on the basis of the % RH and °C/°F parameters.
Deviation
after
before
Working range
WP
e.g. scale = 0 to 100 % RH
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Adjusting testo 6651 using Testo handheld instrument
The service flap is open, a testo 400/650 handheld instrument with a
precision humidity probe is ready.
1 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).
2 Expose the humidity probe (4) of the testo 6651 and the reference
probe (3) to the same reference conditions (e.g. in the humidity generator) and allow climatic conditions to equalize.
3 Switch on the testo 400/650. The two-part display of the handheld
instrument will show the values of the transmitter on the left, and the values of the reference probe on the right. The humidity and temperature values are adjusted to the reference probe using the Probe > Probe Adjustment menu item on the testo 400/650.
4 The 1-point adjustment is performed for both the humidity and the
temperature.
5 Disconnect the adapter (2) from the service interface (5).
1
2
3
4
5
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6 Close the service flap.
1.3.5.3 2-point adjustment
With the 2-point adjustment, the parameter is adjusted to the reference value at the two standard adjustment points 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.
In the 2-point adjustment, the deviations between the reading and the nominal value are minimized across the entire measuring range. The 2-point adjustment is therefore recommended for large working ranges, e.g. in drying processes.
The 2-point adjustment can be performed for the adjustment points
11.3 %RH and 75.3 %RH
via P2A software (see volume 2, chapter 3, page 113) or using the adjustment keys under the service flap, see description of
how to proceed below.
The 2-point adjustment for the adjustment points 20 %RH and 80 %RH is carried out via the user menu.
A 2-point adjustment cancels any previous 1-point adjustment.
Deviation
after
before
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testo 6651 Ethernet - 1.3 Commissioning
Adjusting testo 6651 using adjustment keys
The 2-point adjustment for the adjustment points 20 %RH and 80 %RH is carried out via the user menu.
The service flap of the testo 6651 is open.
1 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.
2 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 appears on the display
11.3 % RH
1.5 h
11.3 % RH
1.5 h
75.3 % RH
1.5 h
75.3 % RH
1.5 h
or
(salt pots) (humidity generator)
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testo 6651 Ethernet - 1.3 Commissioning
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Completion of the adjustment is signalled by the LED (1) coming on permanently and the Probe reset status message is shown.
3 Carry out the adjustment analogously for the reference condition
75.3 % RH. Press on the 75.3 % RH adjustment key (6) to do this.
4 Close the service flap.
1.3.5.4 Analog output adjustment
The purpose of adjusting the analog outputs is to adjust the signal chain from the digital signal (within the transmitter) to the analog outputs. The signal type that was appointed for the transmitter is adjusted respectively for each channel (e.g. 4 to 20 mA or 0 to 1 V, etc.).
1 LED 2 Contact ch. 1 + 3 Contact ch. 1 ­4 Adjust key 11.3 % 5 Service interface 6 Adjust key 75,3 % 7 Contact ch. 2 + 8 Contact ch. 2 -
Adjust analog outputs
A precise multimeter (minimum resolution of 6.5 digits, accuracy of
100
A, e.g. Agilent 34401A) is available.
If only a simple multimeter is available, the analog outputs may not be adjusted.
The service flap is open.
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testo 6651 Ethernet - 1.4 Operation
1 Connect the inputs of the multimeter with the contacts (2) and (3) for
channel 1 or with contacts (7) and (8) for channel 2.
2 Transfer the reference analog value measured with the multimeter to
the P2A software (see volume 2, chapter 3, page 113) or enter it via the user menu (see chapter 1.4.6.8, page 72).
3 Disconnect connections between multimeter and contacts of the
testo 6651 and close service flap.
1.4 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.
If the testo 6651 is connected to the P2A software, the user menu is blocked for the duration of the communication. The message Service plug is shown in the display of the testo 6651. As soon as the P2A software is disconnected, the user menu is accessible again.
1.4.2 Key cover
To prevent unauthorized operation of the keys, the standard key frame can be replaced with a key cover.
If the key cover has been assembled, the service flap must be opened for operation (see Section Opening the instrument, chapter 1.3.3, page 22).
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Attaching the key cover
The service flap is open (see Section Opening the instrument, chapter
1.3.3, page 22).
1 Undo screws (3) and remove key frame (2).
2 Insert key cover (1) into service flap and tighten screws (3).
3 Close and screw down the service flap.
1.4.3 Password protection
The user menu can be protected with a four-digit numerical code (see chapter 1.4.6.4, page 67) so that access to the user menu is denied to unauthorized persons not familiar with this numerical code.
If the password protection is not to be used, the numerical code "0000" must be entered. This is also the status upon delivery.
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testo 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 Analysis main menu Status main menu Ident main menu Adjustment main menu Reset main menu
Four keys enable the user to navigate/scroll through the menus and enter/amend values and settings:
Key Function/description
SET
- In Measuring Mode: changes to parameterization
- In Parameterizing Mode: confirms a selection or setting
ESC
- Leaves a menu (without modifying any settings)
- Selecting: scrolls through menus (downwards) or selectable
alternatives
- Editing: changes to next digit (to the right)
- Selecting: scrolls through menus (upwards) or selectable alternatives
- Editing: increases the value of the current digit by 1
19.3 °C
57.8 % RH
-4.1 °C td
Channel 1 display
Channel 2 display
Display for messages
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1.4.5 Overview of the testo 6651 user menu
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testo 6651 Ethernet - 1.4 Operation
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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.
1 In Measuring Mode, press Set, select Main Menu Channel 1 using
or and confirm selection with set.
One of the following parameters can now be selected using or , after which the selection must be confirmed with SET:
Channel 1 unit
The parameter for this channel is selected. Selection: % RH, °C, °F, °Ctd, °Ftd,
g/m
3
.
Edit/select parameter with or , confirm with SET or abort input with ESC.
Scale minimum for channel 1
The lower scale limit is edited; Unit as selected above (example: 4 mA = 0 % RH).
Editing the value: Scroll one digit to the right using , increase value of digit by 1 using . Confirm with SET or abort entry with ESC.
Scale maximum for channel 1
The upper scale limit is edited; Unit as selected above (example: 20 mA = 100 % RH).
Editing the value: Scroll one digit to the right using , increase value of digit by 1 using . Confirm with SET or abort entry with ESC.
Signal delay ("Damping")for channel 1
The analog signal can be delayed ("Damping"); a time constant is selected for this (1 = no delay; 15 = longest delay). Edit/select parameter using or , confirm with SET or cancel entry via ESC.
2 Continue to Main Menu Channel 2 using or or return to
Measuring Mode by pressing esc.
1.4.6.2 Editing main menu of channel 2
See channel 1.
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testo 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. If an alarm is to be used to monitor limit values, you can choose between monitoring the minimum or maximum value and set a limit value and hysteresis for each alarm.
1 In Measuring Mode, press Set, select Main Menu Alarm using or
and confirm selection with set.
Four alarms can be parameterized.
2 Select Alarm x using or and confirm selection with SET.
Using alarm to monitor limit values
3 Select Channel x (e.g. "Channel 1") using or and confirm
selection with SET.
4 Select Max control or Min control with  or  (see graphic).
5 Press SET and edit limit value and hysteresis: Scroll one digit to the
right using , increase value of digit by 1 using . Confirm with SET or abort entry with ESC.
6 Return to Channel x by pressing ESC.
7 Return to Alarm x by pressing ESC. 8 Change to the other relays using or and perform settings in the
same way.
Monitoring minimum Monitoring maximum
Hysteresis Hysteresis
Limit value Limit value
Off Off
On On
Cannel 2 e.g. °C
NO contact
NC contact
On
Off
Off
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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.
Note:
The messages affecting the collective alarm can be selected in the P2A software (see volume 2, chapter 3, page 113).
Alarm is selected (see previous steps 1 and 2).
1 Specify with  or  whether Alarm x is to be used as the Alarm
relay or is not to be used. Confirm selection with SET and return to Alarm x.
2 Change to another alarm using or and perform settings in the
same way.
3 Continue to Main Menu Settings using or or return to Measuring
Mode by pressing ESC.
1.4.6.4 Editing Main Menu Settings
You can edit instrument settings and other settings.
▪ In Measuring Mode, press SET, select Main Menu Settings using
or and confirm selection with SET.
You can edit settings for:
Display Language Code.
Editing display settings
You can set the brightness and contrast of the display.
1 Select Display Settings using or and confirm selection with set. 2 Select Backlight, Contrast or Backlight on 24 h using  or  and
confirm selection using SET.
One of the following parameters can now be selected using or , after which the selection must be confirmed with SET:
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testo 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
The brightness difference between the display background and the displayed values 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).
Backlight on 24 h
Using or select On or Off and confirm with SET. Off: The display light switches off automatically if no button was
pressed for 30 seconds.
On: The display light is activated
3 Go back to Display Settings by pressing ESC and continue to
Language using  or .
Selecting language
You can select the language for the plain text line in the display.
▪ Press SET, select required language with  or , confirm selection
with SET and return to Language.
Only choose a language that you can understand well.
Editing code settings
You can set the access code (password).
If a code other than "0000" (factory setting) is set, the transmitter can only be operated once this code has been entered via the menu.
1 Select Code using  or  and confirm selection with set. 2 Scroll one digit to the right using , increase value of digit by 1 using
. Confirm with SET or abort entry with ESC.
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3 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. values).
Testing functionality of analog outputs
This function affects the analog outputs directly, not only the test contacts.
1 In Measuring Mode, press Set, select Main menu analysis using or
and confirm selection using set.
Test Analog Output is shown. Any analog output value can be predefined, e.g. for an analog output of 4 to 20 mA, the value "6.0 mA".
2 Press SET, choose between Analog Output 1, 2 with or . 3 Press SET, scroll one digit to the right using , increase value of digit
by 1 using . Confirm with SET or abort entry with ESC.
4 Adopt the settings using SET and test with the multimeter at the test
contacts below the service flap (minimum requirement: resolution of
6.5 digits, accuracy of 100 nA):
1 Channel 1 test
contacts
2 Service
interface
3 Channel 2 test
contacts 4 Multimeter 5 Ends of
channel 3
cables
5 Return to Test Analog Output using ESC and continue to Test Relay
Output using  or .
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testo 6651 Ethernet - 1.4 Operation
Testing functionality of relay outputs
1 Press Set, choose between Alarm 1, 2, 3, 4 with or .
2 Press SET.
The relay can now be tested. You can choose between OFF and ON using or . If ON is chosen, the NO contact is closed, the NC contact opened. If OFF is chosen, the NC contact is closed, the NO contact opened.
3 To test, route a measuring cable from the relay terminals (see chapter
1.3.3.3, page 26) out of the transmitter to a multimeter (resistance measurement) or continuity tester.
4 Go back to Test Relay Output by pressing either SET (starts relay
test) or ESC (exits the menu without relay test).
Reading off min./max. values of channels
To reset the max./min. values, see chapter 1.4.6.9, Editing Reset main menu, page 75.
1 Read off the min./max. values of the two channels in succession by
pressing or and return to Main Menu Analysis using esc.
2 Continue to Main Menu Message using or or return to
Measuring Mode by pressing ESC.
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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.
Using the P2A software (see volume 2, chapter 3.3.2, page
119) you can predefine which of the messages are to be shown in the display.
1 In Measuring Mode, press set, select Main Menu Message using or
and confirm selection with set.
2 Confirm Confirm message using SET. 3 Select Last messages using or and confirm with SET. 4 Scroll between the messages recorded so far using or and press
ESC to return to Last messages.
5 Continue to Display of message with or .
ON: Measurements are shown on the display in Measuring Mode. OFF: No messages shown on display.
6 Select ON or OFF using  or  and confirm selection with SET.
7 Return to Main Menu Message by pressing ESC. 8 Continue to Main Menu Ident using or or return to Measuring
Mode by pressing ESC.
An overview of the messages can be found in chapter 1.5, Status, warning and error messages, page 76.
348 h
4/7
Scaling changed
Operating hours at the time of message
Message number/number of messages present Example: "4/7" refers to the fourth of seven messages
Message text
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testo 6651 Ethernet - 1.4 Operation
1.4.6.7 Calling up Main Menu Ident
The serial numbers of the transmitter and probe can be read off.
1 In Measuring Mode, press set, select Main Menu Ident using or
and confirm selection with set.
The type, firmware version and serial number of the transmitter are displayed.
2 Press ESC to return to the Main Menu Ident or read off the type,
firmware version and serial number of the probe using or and then press or to return to the Main Menu Ident.
3 Continue to Main Menu Adjustment using or or return to
Measuring Mode by pressing esc.
1.4.6.8 Editing Adjust main menu
A reference value can be entered for both relative humidity (% RH) and temperature (°C/°F) for the 1-point adjustment. Please refer to the description in Chapter 1.3.5.2, 1-point adjustment (offset), page 55.
In addition, the analog outputs can be adjusted. See Chapter 1.3.5.4, Analog output adjustment, page 59 how to do this.
The 2-point adjustment for the adjustment points 20 %RH and 80 %RH is carried out via the user menu.
For the adjustment points 11.3 %RH and 75.3 %RH, the 2­point adjustment is carried out via the adjustment buttons or the P2A software (see chapter 1.3.5.3, page 57 or volume 2, chapter 3.3.2, page 119).
6651
2.01
Serial
11111111
Instruments or probe type
Firmware version
Serial number
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Enter reference value for 1-point adjustment
Please also refer to chapter 1.3.5.2, 1-point adjustment (offset), page 55.
1 In Measuring Mode, press SET, select Main Menu Adjust using or
and confirm selection with SET.
2 Reference value % RH is displayed. 3 Press SET, edit value: Scroll one digit to the right using , increase
value of digit by 1 using . Confirm with SET or cancel entry with ESC.
4 Continue to Reference value temp with or .
5 Press SET and Reference value °C is displayed. 6 Press SET, edit value: Scroll one digit to the right using , increase
value of digit by 1 using . Confirm with SET or abort entry with ESC. 7 Continue to Reference value °F with or . 8 Press SET, edit value: Scroll one digit to the right using , increase
value of digit by 1 using . Confirm with SET or abort entry with ESC. 9 Continue to Analog Adj. Ch. 1 with or .
10 Continue with the adjustment of the analog outputs (see below, step 2)
or press ESC to return to Main Menu Adjustment. 11 Continue to Main Menu Reset using or or return to Measuring
Mode by pressing ESC.
Performing the 2-Points-Adjustment for 20% RH and 80 % RH
1 In the Measuring Mode press SET, select main menu Adjust with
or and confirm selection with SET.
2 Continue to 2Pt Adjust 20/80% with or .
3 Press SET. 4 Continue to Adj. Point 20% or Adj. Point 80% with or
5 Confirm selection with SET.
The red LED ADJ flashes.
In the display 2Pt Adjust 20/80%, 1-point adjustment, Probe reset
appe
ars consecutively.
The adjusted measurement values appear after probe reset.
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testo 6651 Ethernet - 1.4 Operation
Performing analog adjustment
Please refer to chapter 1.3.5.4, page 59.
1 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 %; 50 %; 90°% of the analog scale).
2 Select Analog Adj. Ch. 1 using or and confirm with SET. 3 Select Adj. Point 1 using or .
4 Press SET. Read off multimeter display (e.g. 5.601 mA) and enter this
value in the user menu. Do this by scrolling one digit to the right using and increasing the value of digit by 1 using . Confirm with SET or abort entry with ESC.
5 Select Adj. Point 2 using or .
6 Press SET. Read off multimeter display (e.g. 12,001 mA) and enter
this value in the user menu. Do this by scrolling one digit to the right using and increasing the value of digit by 1 using . Confirm with SET or abort entry with ESC.
7 Select Adj. Point 3 using or .
8 Press SET. Read off multimeter display (e.g. 18,401 mA) and enter
this value in the user menu. Do this by scrolling one digit to the right using and increasing the value of digit by 1 using . Confirm with SET or abort entry with ESC.
9 Continue to Analog Adj. Ch. 2 with or (repeat steps 3 to 8).
10 Return to Main Menu Adjust by pressing ESC. 11 Continue to Main Menu Reset using or or return to Measuring
Mode by pressing ESC.
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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.
1 In Measuring Mode, press SET, select Main Menu Reset using or
and confirm selection with SET.
Reset device to factory settings is displayed.
2 Select the setting to be reset using or and confirm selection with
SET.
Reset Completed is displayed.
3 Press ESC or SET to return to reset setting and press ESC to return to
Main Menu Reset. 4 Continue to Main Menu Channel 1 using or or return to
Measuring Mode by pressing ESC.
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testo 6651 Ethernet - 1.5 Status, warning and error messages
1.5 Status, warning and error messages
To achieve optimum operational reliability (machine availability), the transmitter provides the following via the user menu (see chapter 1.4, page 60) or the P2A software (see volume 2, Chapter 3, page 113):
Status 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.
In the transmitter, the last 180 messages are stored in a ring memory, but there is no restriction in the P2A software.
1.5.1 Transmitter status messages
Status messages show the current operating mode of the testo 6651.
Message Display Description
00300 New limit value The limit value has been changed or shifted
00301 Scaling changed The scaling has been changed
00500 Transmitter reset: The transmitter is reset to the factory settings
and is restarted.
0052F Reset Min/Max Resets all saved Min/Max values for all channels
02506 Probe connection A probe has been connected
01D19 Service plug The Mini-DIN socket is connected to: the USB
adapter for P2A software, the adjustment adapter or the service plug (is not recorded/no number)
00307 User Setting Change User Setting Change: General settings were
changed for the transmitter.
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Message Display Description
02d07 Probe disconnected No probe is connected
02104 Analog out adjust An analog adjustment has been made
02101 1-point adjustment A 1-point adjustment is performed.
02102 2-point adjustment
11,3%
As part of the 2-point adjustment, an adjustment is performed at 11.3 % RH
02103 2-point adjustment
75.3%
As part of the 2-point adjustment, an adjustment is performed at 75.3 % RH
02120 2-point adjustment 20 % As part of the 2-point adjustment, an adjustment
is performed at 20 % RH
02130 2-point adjustment 80 % As part of the 2-point adjustment, an adjustment
is performed at 80 % RH
02518 Probe reset Probe reset: The probe performs a reset
1.5.2 Transmitter warning messages
Warning messages show an early warning or a current malfunction which may negatively impact measuring.
Message Display Cause Remedying of fault
02101 2-point adjustment
drift*
In the 2-point adjustment, corrections repeatedly occur in the same direction; this may indicate a sensor drift
Send the probe into Testo Service
00E00 T ambient high** The ambient temperature
exceeds the permissible temperature for the transmitter
Take necessary measures to lower ambient temperature, e.g. through venting or cooling
00E01 T ambient low** The ambient temperature is
below the permissible temperature for the transmitter
Take necessary measures to raise ambient temperature, e.g. through heating
00E02 Supply voltage
low**
The supply voltage is below the minimum voltage required for the transmitter
Ensure sufficient voltage supply
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testo 6651 Ethernet - 1.5 Status, warning and error messages
Message Display Cause Remedying of fault
00E00 T process high** The process temperature
exceeds the temperature designated for the probe
Remove the probe from the process and take any necessary measures to lower the process temperature
02806 Condensation* 100 % RH has been
reached, condensation developing
Take measures to reduce process humidity
02807 Values less than
0 % RH**
The adjustment or sensor is faulty
Check adjustment (via P2A adjustment history, perform 2-point adjustment where necessary)
If the problem persists, contact Testo Service
* Early warning ** Current malfunction
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79
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
is interrupted
Ensure that the probe connector is fully engaged in the transmitter.
- If communication still
cannot be established, contact Testo Service
03508 Wrong probe The connected probe is not
compatible with the present transmitter
Use a compatible probe Note: The 660x probes
match the 665x transmitter, and the 661x probes the 668x transmitter
01528 Watchdog error Due to a processor error,
the transmitter performs an automatic restart
If the problem occurs frequently, contact Testo Service
0300A % RH sensor
short-circuit
Short-circuit in humidity sensor
Contact Testo Service
0300B %RH sensor
broken
The humidity sensor is damaged (sensor broken)
Contact Testo Service
0300C T sensor short-
circuit
Short-circuit in temperature sensor
Contact Testo Service
0300D T sensor broken The temperature sensor is
damaged (sensor broken)
Contact Testo Service
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testo 6651 Ethernet - 1.5 Status, warning and error messages
1.5.4 Handling alarm messages
Shown on the
display 1
Can be used for
collective alarm
2
Message start/end
Limit value x x
Scaling changed x x
Transmitter reset x x
Reset Min/Max x
Transmitter refresh x
Probe connection
Service plug
User Setting Change x
Probe disconnected
Analog out adjust x x
1-point adjustment: x x
2-point adjustment 11,3% x x
2-point adjustment 75.3% x x
Probe reset x x
2-point adjustment drift* x
T ambient high** x
T ambient low** x
Supply voltage low** x
T process high** x
Condensation*: x
Values less than 0 % RH**
x
No probe signal x
Wrong probe
Watchdog error x
% RH sensor short-circuit x
%RH sensor broken x
T sensor short-circuit x
T sensor broken x
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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.
2 The message can be assigned the collective alarm function, which means
that the collective alarm is activated as soon as at least one of the messages assigned to it is activated. The collective alarm can be assigned to each of the 4 optional relays. The collective alarm is then always the same, as it can only be defined once.
Execute Confirm message function (via control keys at transmitter):
The message / alarm is no longer shown on the display. If multiple
messages/alarms are active at the same time, all are reset simultaneously.
If at least one message is assigned to the collective alarm, the collective
alarm is reset. If the collective alarm is set on a relay, the relay is also reset, meaning switched to its neutral position.
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.
Analog output
Display message Class 0-20mA 4-20mA 1V 5V 10V
No probe signal Error 21mA 21mA 1.2V 5.5V 11V
Wrong probe Error 21mA 21mA 1.2V 5.5V 11V
Watchdog error Error 21mA 21mA 1.2V 5.5V 11V
Values < 0 %RH Underrange 0mA 3.8mA 0V 0V 0V
Condensation Overrange 20.5mA 20.5mA 1.2V 5.5V 11V
%RH short-circuit Error 21mA 21mA 1.2V 5.5V 11V
%RH sensor broken Error 21mA 21mA 1.2V 5.5V 11V
T short-circuit Error 21mA 21mA 1.2V 5.5V 11V
T sensor broken Error 21mA 21mA 1.2V 5.5V 11V
Probe disconnected Error 21mA 21mA 1.2V 5.5V 11V
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testo 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 P2A software (see volume 2, chapter 3, page 113)
Convenient "remote monitoring" of the transmitter can be implemented, for example by using a relay as a collective alarm (see chapter 1.4.6.3, page 66) whose messages are forwarded to a local alarm transmitter (horn, light) or PLC.
1.6.2 Cleaning the instrument
▪ Only clean the instrument carefully with a moist cloth. ▪ Do not use aggressive cleaning agents. ▪ Do not use any solvents. ▪ Do not touch or damage the sensor
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