TESTO 6681 Profibus User manual

testo 6681 Ethernet · Humidity transmitte
r
with Ethernet module
testo 6610 · Probes
P2A software · Parameterizing, adjusting and analyzing
software
Instruction manual Volume 1 en

Safety and the environment 3
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.

4 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.
►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.

About this document 5
Character/
display:
Explanation/example
1 Steps are numbered if a certain sequence of actions must
be followed, e.g.:
1Loosen and remove housing screws.
2Remove 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 6681 until it
engages.
" to " 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 > P2A 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.

6 Contents
Contents
SAFETY AND THE ENVIRONMENT ......................................................................... 3
ABOUT THIS DOCUMENT ..................................................................................... 4
CONTENTS......................................................................................................... 6
1TRANSMITTER............................................................................................ 8
1.1 Specifications........................................................................................... 8
1.1.1 Functions and use....................................................................... 8
1.1.2 Scope of delivery ........................................................................ 8
1.1.3 Accessories................................................................................. 9
1.1.4 Technical Data ............................................................................ 9
1.1.5 Dimensions ............................................................................... 11
1.2 Product description................................................................................ 12
1.2.1 At a glance ................................................................................ 12
1.2.2 Usable probes ........................................................................... 13
1.2.3 Display and keypad................................................................... 14
1.2.4 Service interface ....................................................................... 14
1.2.5 Relay board (option) ................................................................. 14
1.2.6 Analog outputs .......................................................................... 15
1.2.7 Parameters................................................................................ 15
1.2.8 Scaling ...................................................................................... 16
1.2.9 Alarm handling .......................................................................... 18
1.3 Commissioning ...................................................................................... 19
1.3.1 Insert Ethernet module (Order no. 0554 6656)......................... 19
1.3.2 Assembling the instrument........................................................ 21
1.3.3 Connecting the instrument ........................................................ 24
1.3.4 Ethernet communication ........................................................... 38
1.3.5 Adjusting the instrument ........................................................... 57
1.4 Operation ............................................................................................... 68
1.4.1 Relationship between user menu and mini-DIN socket is active
.................................................................................................. 68
1.4.2 Key cover .................................................................................. 69
1.4.3 Password protection ................................................................. 70
1.4.4 Structure of user menu .............................................................70
1.4.5 Overview of the testo 6681 user menu............................................ 72
1.4.6 The individual main menus ....................................................... 74
1.5 Status, warning and error messages..................................................... 87
1.5.1 Status messages ...................................................................... 87
1.5.2 Warning messages ................................................................... 88

Contents 7
1.5.3 Transmitter error messages......................................................90
1.5.4 Status codes in cyclical service ................................................91
1.5.5 Handling alarm messages ........................................................91
1.5.6 Namur fault conditions ..............................................................93
1.6 Maintenance and cleaning.....................................................................94
1.6.1 Maintaining the instrument........................................................ 94
1.6.2 Cleaning the instrument ............................................................94

8 testo 6681 Ethernet - 1.1 Specifications
1 Transmitter
1.1 Specifications
1.1.1 Functions and use
The testo 6681 humidity transmitter with Ethernet module is used in
conjunction with plug-in, adjusted probes from the testo 6610 range.
Please refer to volume 2, chapter 2, page 103 for information
about commissioning, operating and maintaining the
testo 6610 probe.
The testo 6681 humidity transmitter is suitable for the following applications
with Ethernet networking, 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 6681 humidity transmitter includes the
following:
Key cover
Rear panel bracket
Ethernet module

testo 6681 Ethernet - 1.1 Specifications 9
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, page 179 or on the
website at www.testo.com.
1.1.4 Technical Data
Parameters
-Humidity (various variables and
units)
-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
Maximum load
- 4-wire: 500 Ω(power output)
Analogue output*
-0 to 1 V ± 1.5 mV (4-wire) or
-0 to 5 V ± 7.5 mV (4-wire) or
-0 to 10 V ± 15 mV (4-wire) or
-0 to 20 mA ± 0.03 mA (4-wire) or
-4 to 20 mA ± 0.03 mA (4-wire)
Resolution of analog output
-12 bit
Relay
-4 relays, 250 V AC/DC, 3 A
(optional)
Display
-2-line LCD with plain text line
(optional)

10 testo 6681 Ethernet - 1.1 Specifications
Housing operating temperature
--40 to +70 °C/-40 to +158 °F, with
display from 0 to 50 °C/+32 to +122 °F
-With integrated relay: -40 - +60 °C
Operating humidity
-0...100 %rF
Storage temperature
-- 40 to 80 °C/-40 to +176 °F
Housing, weight
-Metal: 1.960 kg
-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