Testo 6681 Manual de Usario

Testo No categorizado 6681

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Optimum adjustment concept thanks to adjustability of the
entire signal chain incl. analog adjustment
Ethernet, relay and analog outputs allow optimum
integration into individual automation systems
Self-monitoring and early warning guarantee high system
availability
Calculation and presentation of all relevant humidity
parameters
P2A software for parameterization, adjustment and analysis
saves time and costs in commissioning and maintenance
Display with multi-language display
Robust, easy-to-clean metal housing
The industrial humidity
transmitter
testo 6681 + probe
series testo 661x
Industrial humidity measurement demands absolute
professionalism. Not only in running the system, but also
in the measuring technology used. The industrial humidity
transmitter testo 6681, combined with the probe series
testo 661x fulfils these high demands. The testo 6681
has a number of additional features, above and beyond
the properties and benefits of a conventional transmitter,
which will delight practitioners. This and other reasons
make the testo 6681 the first choice in drying technology,
trace humidity and compressed air process technology, as
well as in demanding air conditioning technology, e.g. in
cleanrooms.
www.testo.com
%RH
°C
Supply
Analog outputs
Further outputs
Measurement rate 1/s
Quantity 2, optionally 3 channels (channel freely
selectable)
Resolution 12 bit
Max. load 500 Ω at 24 VAC/DC
Inputs and outputs
Output type 0/4 to 20 mA (2-wire/4-wire)
0 to 1/5/10 V (4-wire)
Ethernet Optional: module can be fitted as
intermediary layer
Voltage supply 2-wire: 24 VDC ±10 %
4-wire: 20 to 30 VAC/DC
Display
Design
Miscellaneous
Installation
Display Optional: 2-line LCD with clear text line
and relay status display
General technical data
Material Metal
Dimensions 122 x 162 x 77 mm (without probe)
Resolution
Protection class IP65
EMC 2004/108/EG
Weight 1.960 kg
(without probe, without Ethernet module)
Operation
Parameterization 4 operating buttons for display / P2A
software
Operating conditions
Humidity
Measurement parameters
Measuring range 0 to 100 %RH
Selectable units Dependent on probe, available are:
relative humidity %RH; normed atm. dewpoint
in °CtdA (°Ftd); dewpoint in °Ctd (°Ftd);
absolute humidity in g/m³ (gr/ft³); degree of
humidity in g/kg (gr/lb); enthalpy in kj/kg (BTU/
lb); psychrometer temperature in °Ctw (°Ftw);
water vapour partial pressure in hPa/H20; water
content in ppmV; mixture dewpoint H2O2 in
°Ctm/°Ftm; %RH acc. to WMO; temperature in
°C/°F
Trace humidity
Measuring range -60 to +30 °Ctd / -76 to +86 °Ftd
(only with testo 6610 L15)
Selectable units Dewpoint in °Ctd/°Ftd
Galvanic isolation Galvanic isolation of the output
signals (2-wire and 4-wire), isolation
of supply from outputs (4-wire)
Accuracy of the analog
outputs
0/4 to 20 mA ± 0.03 mA
0 to 1 V ±1.5 mV
0 to 5 V ±7.5 mV
0 to 10 V ±15 mV
Relays Optional: 4 relays (free allocation to
measurement channels or as collective alarm
with operating menu/PsA software), up to
250 V AC/DC / 3 A (NO/NC)
Other outputs Mini DIN for Testo P2A software
Current consumption max. 300 mA
Probe connection Digital probe connection
Temperature
Measuring range Dependent on probe (testo 661x)
Selectable units Temperature in °C/°F
Operating temperature
(with integrated relay)
-40 to +60 °C
Measurement medium Air, nitrogen
Operating temperatureWithout
display
With display
-40 to +70 °C / -40 to +158 °F
Storage temperature -40 to +80 °C / -40 to +176 °F
Operating temperature 0 to +50 °C / +32 to +122 °F
Storage temperature -40 to +80 °C / -40 to +176 °F
0.1 %RH / °Ctd / °Ftd / °Ctw / °Ftw
or 0.01 °C/°F 1g / kg / g/m³ / ppm
testo 6681 – The industrial humidity transmitter + probe series testo 661x
Technical data testo 6681
testo 6681 – The industrial humidity transmitter + probe series testo 661x
Technical data probe range testo 6610
* Other accuracies apply for wall probe length 70 mm combined with a
current output (P07):
Operation: 2 channels at 12 mA, without display illumination, relay
off, additional measurement error to above values at +25 °C (+77°F),
humidity ± 2.5 % RH
**The determination of measurement uncertainty takes place
according to GUM (Guide to the Expression of Uncertainty in
Measurement):
For the determination of measurement uncertainty, the accuracy of
Humidity
Selectable units %RH; °Ctd/°Ftd; g/m3 / gr/ft3; g/kg / gr/lb; kj/kg; BTU/lb; °Ctw/°Ftw; hPa; inch H
2O2; ppm vol %; %vol;
°Ctm (H2O2)/ °Ftm (H2O2)
Reproduceability
t90 max. 10 sec.
Measuring range 0 to 100 %RH***
Measurement
uncertainty*
(+25 °C)**
testo 6611/12/13: ±(1.0 + 0.007 * mv) %RH for 0 to 100 %RH / ±(1.4 + 0.007 * mv) %RH for 90 to 100 %RH;
testo 6614: ±(1.0+ 0.007 * mv) %RH for 0 to 100 %RH;
testo 6617: ±(1.2 + 0.007 * mv) %RH for 0 to 90 %RH / ±(1.6 + 0007 * mv) %RH for 90 to 100 %RH
+0.02 %RH per Kelvin dependent on the process and electronics temperature (for a deviation of 25 °C / 77 °F)
General technical data
Sensor
Response time
testo 6611 testo 6612 testo 6613 testo 6614 testo 6615
Testo capacitive
humidity sensor,
plug-in
better than ±0.2 %RH
Testo capacitive humidity sensor; soldered
Temperature
Selectable units °C/°F
Measuring range
Measurement
uncertainty*
(at +25 °C / +77 °F)
Probes
Cable
Plug
Type
Probe shaft
Probe dimensions
(probe shaft length)
Cable length
Probe dimensions
(diameter)
testo 6617
Measurement parameters
see trace humidity 0 to 100 %RH
-20 to +70 °C/
-4 to +158 °F
-30 to +150 °C/
-22 to +248 °F
-40 to +180 °C/-40 to +356 °F -40 to +180 °C/-
40 to +356 °F
-40 to +120 °C/
-40 to +248 °F
±0.15 °C / 0.27 °F (Pt1000 Class AA) Pt100 Class AA Pt1000 Class AA
Trace humidity
Trace humidity -60 to +30 °Ctd / -76 to +86 °Ftd
Measurement
uncertainty
±1 K at 0° Ctd
±2 K at -40° Ctd
±4 K at -50° Ctd
Wall Cable Cable Heated cable Cable trace
humidity (self-
adjustment)
Cable with cover
electrode monitoring
Stainless steel
FEP coated
Plastic ABS
12 mm
70/200 mm 200/300/500/800
mm
120/200/300/500/
800 mm
200/500 mm
— specially for duct
versions
1/2/5/10 m
Operating conditions
1 bar positive pressure (probe tip) PN 10 (probe tip)
PN 1 (probe tip)
PN 16
(probe tip)
1 bar positive pressure
(probe tip)
Pressure tightness
Operating range Room climate probe
wall mounting
Process humidity
probe duct mounting
Process humidity
probe flexible with
cable
Humidity probe
for high humidity
applications / when
risk of condensation
Humidity probe for
trace humidity /
dewpoint (with self-
adjustment)
Humidity probe with
self-monitoring for
sensor-damaging
media
the measuring instrument (hysteresis, linearity, reproduceability), the
uncertainty contribution of the test site as well as the uncertainty of
the adjustment site (works calibration) are taken into account. For this
purpose, the value of k=2 of the extension factor, which is usual in
measurement technology is used as a basis, which corresponds to a
trust level of 95%.
***For continuous applications in high humidity (>80 %RH at ≤30 °C for
>12 h, >60 %RH at > 30 °C for >12h), please contact us via www.testo.
com. testo 6614 is suitable for high humidity applications.

Especificaciones del producto

Marca: Testo
Categoría: No categorizado
Modelo: 6681

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