TESTO 6651 User manual

testo 6651 Ethernet · Humidity transmitters
testo 6600 · Probes
P2A software · Parameterizing, adjusting and analyzing
software
Instruction manual Volume 2 en

Contents 87
Contents
2TESTO 6600 PROBES ...............................................................................88
2.1 Specifications.........................................................................................88
2.1.1 Functions and use.....................................................................88
2.1.2 Probe assembly ........................................................................90
2.1.3 Accessories...............................................................................91
2.2 Product description ................................................................................ 91
2.2.1 Overview of probe and filter types ............................................91
2.2.2 testo 6601 wall probe................................................................94
2.2.3 testo 6602/6603 duct probe ......................................................98
2.2.4 testo 6604/6605 cable probe ..................................................102
2.3 Commissioning ....................................................................................105
2.3.1 Installing the probe..................................................................105
2.3.2 Connecting/removing the probe to/from the transmitter .........107
2.4 Maintenance and cleaning...................................................................108
2.4.1 Replacing filters/protection caps.............................................108
2.4.2 Cleaning the instrument and filter/protection cap ...................111
2.4.3 Replacing the sensors ............................................................111
3PARAMETERIZING,ADJUSTING AND ANALYZING SOFTWARE (P2A SOFTWARE)
.............................................................................................................113
3.1 Specifications.......................................................................................113
3.1.1 Functions and use...................................................................113
3.1.2 System requirements..............................................................114
3.1.3 Scope of delivery ....................................................................115
3.2 First steps ............................................................................................115
3.2.1 Installing the software/driver ...................................................115
3.2.2 Starting the software...............................................................116
3.3 Using the software ............................................................................... 117
3.3.1 User interface..........................................................................117
3.3.2 Editing instrument/parameter file ............................................119
3.3.3 Analyzing/testing the transmitter.............................................132
3.3.4 Adjusting the transmitter .........................................................137
3.3.5 Transmitter history ..................................................................142
4TIPS AND ASSISTANCE............................................................................148
4.1 Questions and answers .......................................................................148
4.2 Accessories and spare parts ...............................................................149
4.2.1 Ordering options for testo 6651 transmitter (0555 6651) .................151
4.2.2 Ordering options for testo 6600 probes (0555 6600)......................153

88 testo 6600 - 2.1 Specifications
2 testo 6600 probes
2.1 Specifications
2.1.1 Functions and use
The plug-in, adjusted probes from the testo 6600 range are used in
conjunction with the testo 6651 humidity transmitter.
These measuring units are suitable for the following applications, for
example:
Process instrumentation
Test benches
Production and storage air quality
Complex room climate applications
2.1.1.1 Digital probes:
The probes are adjusted in the factory and transmit their adjustment data to
the internal memory of the testo 6651 transmitter. The information is
transmitted between the probe and transmitter in a purely digital form. The
probes can therefore be disconnected from the transmitter for adjustment or
servicing while the transmitter itself can remain at the measuring point.
Hint:
We recommend in this case that a probe of the same type be
inserted into the transmitter immediately in order to be able to
continue measuring with minimal interruption.
The transmitter identifies the probe and records that a probe was connected
in the history.
The testo 6651 transmitter cannot be run with the testo 6610
probes; testo 6600 probes must be used.

testo 6600 - 2.1 Specifications 89
2.1.1.2 The Testo humidity sensor
With the Testo humidity sensor, which has been in successful use and
continually improved for more than ten years, the focus has from the very
beginning been on both accuracy parameters, namely measuring uncertainty
and long-term stability.
The capacitive humidity sensor is in principle a plate capacitor consisting of
two electrically conductive plates (electrodes (1) and (2), see diagram below)
opposite each other.
A humidity-sensitive polymer (5) serves as the dielectric. The special feature
lies in the perfect way the individual layers are matched to each other. This is
evident particularly in the top electrode, which has to perform two tasks that,
at first glance, appear contradictory: it must be completely permeable to the
water vapour that is to be fed into the polymer dielectric, but at the same time
it must be impervious, smooth and repellent to condensate, oil and dirt in
order to protect the sensor.
1 Cover electrode
2 Bottom electrode
3 Substrate
(Ceramic substrate for
mechanical protection)
4 Connections
(protected against corrosion)
5 Dielectric layer

90 testo 6600 - 2.1 Specifications
2.1.1.3 Self-diagnosis
The probes in the testo 6600 range monitor their functionality themselves and
report the following faults:
Sensor breaks
Sensor short-circuit
Condensation
The condensation message is issued at a reading of 100 % RH and
deactivated once the readings are within the valid range.
Error message with drift at the adjustment points
Value for relative humidity less than 0 % RH.
The trigger threshold is set at -2 % RH. This means that an error
message is only issued once a clear effect is discernible.
Adjustment monitoring with and without PC
Operating hours
Excess temperature
Error message if the permissible process temperature is exceeded
2.1.2 Probe assembly
The probes of the testo 6600 range are made up of the following components
(included in delivery):
Probe connector
Probe shaft with protection cap and sensors (% RH and °C or °F)
Mounting bracket (for testo 6602/6603 duct version)
Probe cable (testo 6602 to 6605 duct and cable versions),
bend radius minimum Ø50 mm.
probe
Probe connector
Probe length
Probe
Protection cap, sensor underneath

testo 6600 - 2.2 Product description 91
2.1.3 Accessories
The following accessories are available for probes in the testo 6600 range:
Filters and protection caps (see chapter 2.2.1.4, page 94)
Calibration certificate in accordance with ISO and DAkkS (see chapter
4.2, page 149).
2.2 Product description
2.2.1 Overview of probe and filter types
2.2.1.1 Probe version
A detailed description of the probe versions can be found
from chapter 2.2.2, testo 6601 wall probe, page 94.
The following probe versions are available for the testo 6651 humidity
transmitter:
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

92 testo 6600 - 2.2 Product description
2.2.1.2 Determining the accuracy/measuring uncertainty
The entries for the measuring uncertainty for the probe are determined in
accordance with GUM (Guide to the Expression of Uncertainty in
Measurement/DIN V ENV 13005). All parts that make up the measuring
uncertainty given by Testo are listed below. When comparing the measuring
uncertainty/accuracy between manufacturers, which components are
included is to be taken into account. In many cases, not all elements that
contribute to measuring uncertainty are assessed, for example if the error
contribution of the production adjustment is shown separately or not at all.
The measuring uncertainty of the probe includes the sensor and its
electronics as well as the output of the digital measuring signal:
1. Linearity including scatter Systematic error and scattering of the
components (due to manufacturing
tolerances)
2. Hysteresis Hysteresis indicates the maximum
deviation of the readings that are
obtained when you set the same value for
the parameter, once coming from a
smaller value, once coming from a larger
value (humidity sensors actually have no
hysteresis, but rather very slow
adjustment effects that appear to be
hysteresis when considered only for a
short period.)
3. Reproducibility Repeatability (scattering of the readings
in the event of the same parameter being
entered successively)
4. Production adjustment area The measuring uncertainty of the
adjustment area (including the reference
instrument) in production
5. Uncertainty of the testing Uncertainty of the procedure for
determining points 1 and 2.

testo 6600 - 2.2 Product description 93
2.2.1.3 Ordering options for testo 6600 probes
(0555 6600)
Order code Characteristic
Lxx Probe type
L 01 Probe 6601
L 02 Probe 6602
L 03 Probe 6603
L 04 Probe 6604
L 05 Probe 6605
Mxx Protective
filter
M 01 Stainless steel sintered filter
M 02 Metal wire protection cap
M 03 Sintered PTFE filter
M 04 Open metal protection cap
M 05 ABS plastic cap (open)
Nxx Cable length
N 00 Without cable (testo 6601)
N 01 1 m cable length (testo 6604, 6605)
N 02 2 m cable length (testo 6604, 6605)
N 05 5 m cable length (testo 6605)
N 23 Cable length specifically for duct versions (testo 6602, 6603)
Pxx Probe length
P 07 Probe length approx. 70 mm (testo 6601)
P 14 Probe length approx. 140 mm (testo 6604)
P 20 Probe length approx. 200 mm (testo 6601, 6605)
P 28 Probe length approx. 280 mm (testo 6602, 6603, 6604)
P 50 Probe length approx. 500 mm (testo 6605)

94 testo 6600 - 2.2 Product description
2.2.1.4 Filters
One of the following filters or protection caps can be used for each probe
version:
Filter* Article no.** Characteristic Length A (mm)
M 01 0554 0647 Stainless steel sintered filter 33
M 02 0554 0757 Metal wire protection cap 40,3
M 03 0554 0759 Sintered PTFE filter 35
M 04 0554 0755 Open metal protection cap 35
M 05 0192 0265 Open ABS plastic cap 25
* When ordering the probe, please use this filter code (see chapter 2.2.1.3,
Ordering options for testo 6600 probes (0555 6600), page 93.
** When purchasing a replacement (filters only), please use this order number.
2.2.2 testo 6601 wall probe
The wireless testo 6601 probe is inserted into the testo 6651 humidity
transmitter that is mounted on the wall and ready-wired.
At a glance
In the event of overpressures, the probe may become a
projectile.
For assembly, see Pressure resistance on the following
page.
1 Filter (including: humidity
and temperature sensor)
2 Probe shaft
3 Key
4 Connector

testo 6600 - 2.2 Product description 95
Application
Monitoring and regulating the production and storage air quality when
manufacturing and storing hygroscopic products.
Technical Data
Parameters
- Humidity (% RH/°Ctd/°Ftd), etc.
- Temperature
Measuring range
- Humidity: 0 ... 100 % RH
- Temperature: - 20 ... 70 °C/-4 to
+158 °F
Material
- Probe shaft: ABS plastic
- Connector: ABS plastic
Accuracy (at 25 °C/77°F)*
- Humidity
- Length 200 mm
- ± (1.7 % RH + 0.007 x reading) for
0 to 90 % RH
- ± (1.9 % RH + 0.007 x reading) for
90 to 100 % RH
- 0.02 % RH/K, dependent upon the
process temperature
(with a deviation of ± 25 °C/+77 °F)
- 0.02 % RH/K, dependent upon the
electronics temperature
(with a deviation of 25 °C/+77 °F)
- Temperature
- ±0.2 °C (±0.38 °F)
- Slope PT1000 class A
* Refer to the charts below for the
correlation between temperature
and accuracy.
- Length 70 mm
- As with length of 200 mm, but with
additional measuring error,
specified for the operating mode
2 channels at 12 mA, without
display light, relay off:
- Humidity: ±1.6 % RH (additional)
- Temperature: ±0.6 °C / ±1.1 °F
(additional)
Reproducibility
- Better than ±0.2 % RH
Sensor
Response time without protective filter:
t 90 max. 15 sec.
testo 6651 transmitter
testo 6601 wall probe

96 testo 6600 - 2.2 Product description
Probe dimensions
- Diameter of probe shaft: 12 mm
- E = 55 mm
- L = approx. 70 mm or 200 mm
- L – A = 35 mm or 165 mm
- A (see Table Filters, chapter
2.2.1.4, page 94).
Pressure resistance
- 1 bar positive pressure (probe tip) **
* Refer to the charts below for the
correlation between temperature
and accuracy.
** If installing probe under pressure,
please use cutting ring screw
connection (order no. 0554 1795).
Measuring accuracy of testo 6601 wall probe
Humidity error according to amount |±% RH| as a factor of process humidity
% RH
% RH

testo 6600 - 2.2 Product description 97
Temperature error as a factor of process temperature and temperature of
electronics
System error 6651 + probe, electronics 25 °C/+77 °F
System error 6651 + probe, electronics -25 °C to +70 °C/-13 to +158 °F

98 testo 6600 - 2.2 Product description
2.2.3 testo 6602/6603 duct probe
The testo 6602/6603 probe measures the humidity and temperature in air
ducts.
At a glance
In the event of overpressures, the probe may become a
projectile.
For assembly, see Pressure resistance on the following
page.
1 Filter (including: humidity
and temperature sensor)
2 Probe shaft
3 Wall/duct holder
(accessories,
Order no.: 0554 6651)
4 Mounting bracket
(permanently joined to
probe shaft)
5 Probe cable
6 Key
7 Connector

testo 6600 - 2.2 Product description 99
Application
Continuous measurement of humidity and temperature in air duct
applications
Monitoring and regulating the production and storage air quality in air
ducts when manufacturing and storing hygroscopic products.
testo 6651 transmitter testo 6602/6603 duct probe
Technical Data
Parameters
- Humidity: (% RH/°Ctd/°Ftd), etc.
- Temperature
Measuring range
- Humidity: 0 ... 100 % RH
- Temperature for
6602: -20 ... +70 °C/-4 to +158 °F -
6603: - 30 ... +120 °C/-22 to
+248 °F
Material
- Probe shaft: Plastic PA66GF30
- Line: Sheathed, FEP
- Connector: ABS plastic
Accuracy (at 25 °C/77°F)*
Humidity
- ± (1.7 % RH + 0.007 x reading) for
0 to 90 % RH
- ± (1.9 % RH + 0.007 x reading) for
90 to 100 % RH
- 0.02 % RH/K, dependent upon the
process temperature
(with a deviation of 25 °C/+77 °F)
- 0.02 % RH/K, dependent upon the
electronics temperature
(with a deviation of 25 °C/+77 °F)
Temperature
- ±0.2 °C (±0.38 °F)
Slope PT1000 class A
Reproducibility
- Better than ±0.2 % RH
Sensor
Response time without protective
filter: t 90 max. 15 sec.

100 testo 6600 - 2.2 Product description
Probe dimensions
- Diameter of probe shaft: 12 mm
- L = 280 mm
- L – A = 245 mm
- A (see Table Filters, chapter
2.2.1.4, page 94).
Cable length incl. probe shaft and
filter
- Customized for duct version
Pressure resistance
- 1 bar positive pressure (probe tip)
**
* Refer to the charts below for the
correlation between temperature
and accuracy.
** If installing probe under pressure,
please use cutting ring screw
connection (order no. 0554 1796).
Measuring accuracy of testo 6602/6603 duct probe
Humidity error according to amount |±% RH| as a factor of process humidity
% RH
% RH

testo 6600 - 2.2 Product description 101
Temperature error as a factor of process temperature and temperature of
electronics
System error 6651 + probe, elect
r
onics 25 °C/+77 °F
System error 6651 + probe, electronics -25 °C to +70 °C/-13 to

102 testo 6600 - 2.2 Product description
2.2.4 testo 6604/6605 cable probe
The testo 6604/6605 probes are used when the spatial separation of the
transmitter and probe is required.
At a glance
In the event of overpressures, the probe may become a
projectile.
For assembly, see Pressure resistance on the following
page.
Application
Monitoring and regulating industrial humidity processes (apart from
high-humidity processes), e.g. food production
Monitoring the production and storage air quality when manufacturing
and storing hygroscopic products.
1 Connector
2 Key
3 Probe cable
4 Probe shaft
5 Filter (including: humidity
and temperature sensor)
1
2
3
5
4

testo 6600 - 2.2 Product description 103
testo 6651 transmitter testo 6604/6605 cable probe
Technical Data
Parameters
- Humidity: (% RH/°Ctd/°Ftd)
- Temperature
Measuring range
- Humidity: 0 ... 100 % RH
- Temperature for
6604: -20 ... +70 °C/-4 to +158 °F -
6605: - 30 ... +120 °C/-22 to +248
°F
Material
- Probe shaft for
6604: Plastic PA66GF30
6605: Stainless steel
- Line: Sheathed, FEP
- Connector: ABS plastic
Accuracy (at 25 °C/77 °F)*
Humidity
- ± (1,7 % RH + 0.007 x reading) for
0 to 90 % RH
- ± (1.9 % RH + 0.007 x reading) for
90 to 100 % RH
- 0.02 % RH/K, dependent upon the
process temperature
(with a deviation of 25 °C/+77 °F)
- 0.02 % RH/K, dependent upon the
electronics temperature
(with a deviation of 25 °C/+77 °F)
Temperature
- 6604: ±0.2 °C (±0.38 °F)
- 6605: ±0,15 °C / ±0,27 °F
6604: Slope PT1000 class A
6605: Slope PT1000 class AA
Reproducibility
- Better than ±0.2 % RH
Sensor
Response time without protective
filter: t 90 max. 15 sec.
Probe dimensions
- Diameter of probe shaft: 12 mm
- L = 6604 140/280 mm
L = 6605 200/500 mm
- L – A = 6604 105 mm/245 mm
- L – A = 6605 165 mm/465 mm
- A, see Table Filters, chapter
2.2.1.4, page 94.

104 testo 6600 - 2.2 Product description
Probe length incl. probe shaft and
filter
- 1/2/5 m
Pressure resistance**
- testo 6604: 1 bar positive pressure
(probe tip)
- testo 6605: PN 10 (probe tip)
* Refer to the charts below for the
correlation between temperature
and accuracy.
** testo 6604: If installing probe
under pressure, please use PTFE
ring screw connection (order no.
0554 1796).
testo 6605: If installing probe
under pressure, please use
cutting ring screw connection
(order no. 0554 1795).
Measuring accuracy of testo 6604/6605 cable probe
Humidity error according to amount |±% RH| as a factor of process humidity
% RH
% RH