GHM GREISINGER GMH 3331 User manual

Operating manual
GMH 3331
Digital precision handheld measuring
device
EN

Table of contents
2 / 32 B-H77.0.01.DB2-1.0
Table of contents
1 About this documentation ................................................................................................................. 4
1.1 Foreword............................................................................................................................................... 4
1.2 Purpose of the document...................................................................................................................... 4
1.3 Legal notices......................................................................................................................................... 4
1.4 Correctness of content.......................................................................................................................... 4
1.5 Layout of this document........................................................................................................................ 4
1.6 Further information ............................................................................................................................... 5
2 Safety ................................................................................................................................................... 6
2.1 Explanation of safety symbols .............................................................................................................. 6
2.2 Foreseeable misuse ............................................................................................................................. 6
2.3 Safety instructions ................................................................................................................................ 6
2.4 Intended use ......................................................................................................................................... 7
2.5 Qualified personnel............................................................................................................................... 7
3 Description .......................................................................................................................................... 8
3.1 Scope of delivery .................................................................................................................................. 8
3.2 Functional description........................................................................................................................... 8
4 The product at a glance ..................................................................................................................... 9
4.1 The GMH 3331 ..................................................................................................................................... 9
4.2 Display elements .................................................................................................................................. 9
4.3 Operating elements ............................................................................................................................ 10
4.4 Connections........................................................................................................................................ 11
4.5 Support stand ..................................................................................................................................... 11
5 Operation........................................................................................................................................... 13
5.1 Commissioning ................................................................................................................................... 13
5.1.1 Explanation ......................................................................................................................................... 13
5.2 Configuration ...................................................................................................................................... 13
5.2.1 Explanation ......................................................................................................................................... 13
5.2.2 Opening the configuration menu......................................................................................................... 13
5.2.3 Configuring parameters of the configuration menu............................................................................. 14
6 Bases for measurement ................................................................................................................... 16
6.1 Special functions................................................................................................................................. 16
6.2 Measurements with the TFS 0100E combination measuring probe ................................................... 16
6.2.1 Relative air humidity r.H...................................................................................................................... 16
6.2.2 Environmental temperature T1 ........................................................................................................... 17
6.2.3 Dewpoint temperature Td ................................................................................................................... 17
6.2.4 Enthalpy h........................................................................................................................................... 17
6.2.5 Surface temperature T2...................................................................................................................... 17
6.2.6 Dewpoint distance Δ Td...................................................................................................................... 17
6.3 Measurements with the STS 005 / STS 020 flow measuring probes ................................................. 17
6.3.1 Averaging processes for flow measurement....................................................................................... 18
6.3.2 Additionally with optional Typ-K temperature probe on T2 ................................................................. 18
6.4 Universal output.................................................................................................................................. 18
6.4.1 Interface.............................................................................................................................................. 19
6.4.2 Channel assignment ........................................................................................................................... 19

Table of contents
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7 Operation and maintenance ............................................................................................................ 21
7.1 Operating and maintenance notices ................................................................................................... 21
7.2 Battery ................................................................................................................................................ 21
7.2.1 Battery indicator.................................................................................................................................. 21
7.2.2 Changing battery ................................................................................................................................ 21
7.3 Relative air humidity measurement adjustment.................................................................................. 22
7.3.1 General information for adjustment .................................................................................................... 22
7.3.2 Automatic adjustment ......................................................................................................................... 23
7.3.3 Manual adjustment ............................................................................................................................. 23
7.4 Certificates.......................................................................................................................................... 24
8 Error and system messages............................................................................................................ 26
9 Disposal............................................................................................................................................. 27
10 Technical data................................................................................................................................... 28
11 Spare parts and accessories ........................................................................................................... 30
12 Service ............................................................................................................................................... 31
12.1 Manufacturer....................................................................................................................................... 31
12.2 Repairs processing ............................................................................................................................. 31
12.3 Sales offices ....................................................................................................................................... 31
12.4 Sales subsidiaries............................................................................................................................... 32

1 | About this documentation GMH 3331
4 / 32 B-H77.0.01.DB2-1.0
1 About this documentation
1.1 Foreword
Read this document carefully and familiarise yourself with the operation of the product
before you use it. Keep this document ready to hand and in the immediate vicinity of
the product so that it is available to the personnel/user for reference at all times in
case of doubt.
The product was developed according to the state of the art and fulfils the require-
ments of the applicable European and national Directives. All corresponding docu-
ments are available from the manufacturer.
Only technically qualified persons are permitted to carry out commissioning, operation,
maintenance and decommissioning. The qualified personnel must have carefully read
and understood the operating manual before beginning any work.
1.2 Purpose of the document
– This document describes the operation and maintenance of the product.
– It provides important information for working safely and efficiently with the product.
– In addition to the quick reference guide with all relevant legal and safety content in
hard copy, this document is a detailed reference option for the product.
1.3 Legal notices
The liability and warranty of the manufacturer for damages and consequential dam-
ages are voided with misuse, disregarding this document, disregarding safety notices,
assignment of inadequately qualified technical personnel and arbitrary modifications of
the product.
Only carry out the maintenance and service tasks on this product that are described in
this documentation. In the process, adhere to the specified steps. For your own safety,
only use original spare parts and accessories of the manufacturer. We assume no li-
ability for the use of other products and resulting damage.
This document is entrusted to the recipient for personal use only. Any impermissible
transfer, duplication, translation into other languages or excerpts from this operating
manual are prohibited.
The manufacturer assumes no liability for print errors.
1.4 Correctness of content
The contents of this document were checked for corrected and are subject to a con-
tinuous correction and updating process. This does not rule out potential errors. In the
event that errors are discovered or in case of suggestions for improvement, please in-
form us immediately via the indicated contact information in order to help us make this
document even more user-friendly.
1.5 Layout of this document
Description
Each chapter is explained at the beginning in the description.

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Prerequisite
All mandatory prerequisites are then listed for each step.
Instruction
Tasks to be carried out by the personnel / user are represented as numbered instruc-
tions. Adhere to the sequence of the specified instructions.
Representation
Shows an illustrative instruction or a configuration of the product.
Formula
Some instructions include a formula for a general understanding of a configuration,
programming or a setting of the product.
Outcome of an action
Result, consequence or effect of an instruction.
Emphases
In order to simplify legibility and provide a clearer overview, various sections / informa-
tion are emphasised.
–Mechanical controls
–Product functions
–Product labels
–Cross-reference [}p.4]
–Foot notes
1.6 Further information
Software version of the product:
– V1.0 or later
– After the product has been switched on with the On/Off button, the current soft-
ware version can be viewed by pressing the max button and the min button.

2 | Safety GMH 3331
6 / 32 B-H77.0.01.DB2-1.0
2 Safety
2.1 Explanation of safety symbols
DANGER
This symbol warns of imminent danger which can result in death, severe bodily injury,
or severe property damage in case of non-observance.
CAUTION
This symbol warns of potential dangers or harmful situations which can cause damage
to the device or to the environment in case of non-observance.
NOTE
This symbol indicates processes which can have a direct influence on operation or
can trigger an unforeseen reaction in case of non-observance.
2.2 Foreseeable misuse
The fault-free function and operational safety of the product can only be guaranteed if
generally applicable safety precautions and the device-specific safety instructions for
this document are observed.
If these notices are disregarded, personal injury or death, as well as property damage
can occur.
DANGER
Incorrect area of application!
In order to prevent erratic behaviour of the product, personal injury or property dam-
age, the product must be used exclusively as described in the chapter Description
[}p.8] in the operating manual.
– Do not use in safety / Emergency Stop devices!
– The product is not suitable for use in explosion-prone areas!
– The product must not be used for diagnostic or other medical purposes on pa-
tients!
2.3 Safety instructions
This product has been designed and tested according to the safety requirements for
electronic measuring devices. The product must be used according to the technical
data. Technical data [}p.28].

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CAUTION
Erratic behaviour!
On suspicion that the product can no longer be operated without danger, it must be
decommissioned and prevented from recommissioning with appropriate labelling. The
safety of the user can be impaired by the device if, for example, if it shows visible
damage, it no longer works as specified or if it was stored for an extended period of
time under unsuitable conditions.
– Visual inspection!
– In case of doubt, send the product to the manufacturer for repair or maintenance!
CAUTION
Avoid overvoltage!
Check the voltage when connecting to a mains adapter. Simple mains adapters can
have an excessively high open circuit voltage, which could cause a malfunction or
destroy the product.
– Use a suitable mains adapter with a voltage between 10.5 and 12 V DC!
– The operating voltage on the mains adapter must match the mains voltage!
NOTE
The fault-free function and operational safety of the product can only be guaranteed
under the climatic conditions specified in the chapter Technical data. If the product is
transported from a cold environment into a warm environment, the device can mal-
function due to condensate formation. In this case, wait for the assimilation of the
device temperature to the environmental temperature.
NOTE
This product does not belong in children's hands!
2.4 Intended use
The product is designed for room climate measurements in combination with the com-
bination measuring probe TFS 0100E. This comprises detection of air humidity, tem-
perature, dewpoint, dewpoint distance and enthalpy.
Together with the flow measuring probes STS 005 and STS 020, the product enables
measurement of the flow speed of water and/or air.
2.5 Qualified personnel
For commissioning, operation and maintenance, the relevant personnel must have ad-
equate knowledge of the measuring process and the significance of the measure-
ments. This document makes a valuable contribution to this. The instructions in this
document must be understood, observed and followed.
In order to avoid any risks arising from interpretation of the measurements in the con-
crete application, the user must have additional expertise. The user is solely liable for
damages/danger resulting from misinterpretation due to inadequate expertise.

3 | Description GMH 3331
8 / 32 B-H77.0.01.DB2-1.0
3 Description
3.1 Scope of delivery
Please check to ensure the completeness of the product after opening the package.
You should find the following components:
– Handheld measuring device, ready for operation, including battery
– Operating manual
3.2 Functional description
The product is a universal precision hygrometer/thermometer with flow meter and ad-
ditional thermocouple input in a single device. The interchangeable probes can be
change without recalibration, because they store their calibration data in an integrated
buffer and/or are interchangeable due to the high mechanical precision.
The product can be switched on, switched off and configured and the measurements
and parameters can be adjusted and held with the operating elements. The product
has a universal output, a sensor connection and a temperature input. The T2 thermo-
couple input is optimised to detect surface temperatures, for example, in order to be
able to display the distance from the dewpoint directly.

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4 The product at a glance
4.1 The GMH 3331
LCD Display
GMH 3331
4.2 Display elements
Upper display bar
CAL Humidity calibration If humidity calibration is in progress, an arrow ap-
pears under CAL
m/s Unit The flow speed is displayed in m/s in the main dis-
play
r.H. Relative air humidity in % If a relative air humidity measurement is active, an
arrow is displayed below r.H.
Main display
TFS 0100E
Measurement of the current relative air humidity in
%
STS 005 / STS 020
Measurement of the current flow speed in m/s
Auxiliary display
TFS 0100E
T1: Temperature of the TFS 0100E
Td: Dewpoint temperature of the air
kJ/kg: Enthalpy
With sensor at temperature input: T2
T2: Surface temperature
ΔTd: Dewpoint distance T2 – Td
STS 005 / STS 020
t.AVG: Remaining time until display of the average
flow value in s
With sensor at temperature input: T2
T2: Temperature
Lower display bar
Corr Correction factor Was a customer-side sensor calibration carried, an
arrow is displayed above Corr

4 | The product at a glance GMH 3331
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An arrow indicates which value is displayed in the
secondary display
kJ/kg Enthalpy Kilojoules per kilogramme
ΔTd Dewpoint distance T2 - Td
Td Dewpoint temperature of
the air
Unit in °C or °F
T2 Surface temperature Unit in °C or °F
T1 Temperature of the TFS
0100E
Unit in °C or °F
4.3 Operating elements
On / Off button
Press briefly Switch on the product
Long press Switch off the product
max / min button
Press briefly Min measured value
Max measured value
Value input and changes to settings in configuration
Long press Delete Min/Max measured value
cal button
Press 2s Start humidity calibration
Press 10s Reset humidity calibration to factory calibration
set button
Press briefly Change of the secondary display: kJ/kg ∆Td, Td,
T2, T1
Press 2s View the configuration
store button
In a measuring Hold the current measurement
Start a new measurement
Operation of the logger function
In menus Confirmation of the entry
Return to measuring

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4.4 Connections
Output OUT Connection for galvanically isolated interface ad-
apter e.g. GRS 3100, GRS 3105, USB 3100
Analogue output (only GMH 3351)
The 3rd contact has to be left floating! Only stereo
plugs are allowed!
Sensor connection TFS 0100E, air humidity and temperature T1
STS 020, air flow speed. 0.55 .. 20 m/s
STS 005, water flow speed. 0.05 .. 5 m/s
Temperature input T2 Connection for temperature probe type K for meas-
urement of surface temperatures
Dc connector
This is located on the left side of the product
4.5 Support stand
Description The stand is provided as a means to prop up or support the device in a stable surface,
for hanging on the wall or for attachment to a belt.
Instruction 1. Leave the stand collapsed in order to lay the product flat on a stable surface or to
hang it on a belt.
2. Pull the grip labelled open in order to fold it out to a 90° angle. Now, the product
can be positioned on a stable surface.
3. Pull the grip labelled open again in order to fold it out to a 180° angle. Now the
product can be hung.

4 | The product at a glance GMH 3331
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Representation
Outcome of an action The product can be positioned ideally so that the display can always be read clearly
and easily depending on its use.

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5 Operation
5.1 Commissioning
5.1.1 Explanation
Description The product is switched on with the On/Off button. It may be necessary to configure
the product after switching on. See Configuration [}p.13].
Prerequisite
Instruction
– Press the On/Off button.
Outcome of an action Information about the configuration of the product appears in the display.
– The product is now ready for measurement.
5.2 Configuration
5.2.1 Explanation
The following steps describe how to adapt the product for your purposes.
NOTE
There are various configuration parameters available depending on the product ver-
sion and configuration. They can differ depending on the product version and configur-
ation.
5.2.2 Opening the configuration menu
Description In order to configure the product, you must first open the Configuration menu. The
menu is opened as shown in the illustration.
Prerequisite
Instruction
1. Press the Function key for 2 seconds to open the Configuration menu.
2. SET [ONF appears in the display. Release the function key.
3. By briefly pressing the set button, you can scroll through the submenu of the Con-
figuration menu. Select the parameter you would like to configure with the cal but-
ton.
4. When you have selected the desired parameter, change the parameter to the de-
sired value with the max button and the min button.
5. The changes are saved by pressing the set button again.
6. The Configuration menu is exited with the store button.
Representation Call up menu Select sub-
menu
Select para-
meter
Change value Exit menu and
save changes
Press: Single
step
Hold: Rapid
change
Outcome of an action You exit the Configuration menu with the store button and return to the main display.

5 | Operation GMH 3331
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NOTE
If the product is switched off without saving the configuration, the last save value is re-
produced on the next start-up of the product.
5.2.3 Configuring parameters of the configuration menu
Description
Prerequisite
– The Configuration menu is open. See Opening the configuration menu.
Instruction 1. Select the desired submenu item with the set button.
2. Select the desired parameter you would like to configure with the cal button.
3. Adjust the desired configuration in the selected parameter with the max button and
min button.
4. Confirm your selection with the set button or with the cal button.
5. The available configuration options are listed for each parameter in the following
representation.
Representation Menu Para-
meter
Value Meaning
General settings
SET [ONF General settings
* Only if there is no logger data in the data
buffer
* AUG Averaging process only with the STS 005 /
STS 020
[ONT Averaging in progress
HOLD Averaging process at the push of a button
* T.AUG Duration of the averaging process in s only
with the STS 005 / STS 020
1 .. 30
* UNIT Temperature unit
°[
°F
P.OFF Auto Power-Off
1 .. 120 Shut-down delay in min
OFF Deactivate
Interface and analogue output
SET OVT Interface and analogue output
OVT Universal output
OFF No output function, minimum power con-
sumption
SER Universal output is serial interface
ADR. Address if OUT = SER
01, 11 .. 91 Base address of the interface

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Sensor calibration
SET [ORR Sensor calibration
OFS.1 T1 zero point shift only with TFS 0100E
-10.0 °[ .. 10.0 °[
-18.0 °F .. 18.0 °F
OFF Deactivated
OFS.2 T2 zero point shift
-10.0 °[ ... 10.0 °[
-18.0 °F .. 18.0 °F
OFF Deactivated
S[F.2 T2 display correction factor
0.950 .. 1.200
OFF Deactivated
Outcome of an action The changed value is stored. The Configuration is closed by pressing the store button.
NOTE
The configuration is closed if no button is pressed for 2 minutes. Any changes made
up to that point are not saved.

6 | Bases for measurement GMH 3331
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6 Bases for measurement
6.1 Special functions
Zero point shift
A zero point shift can be made for each of the two temperature channels T1 (only
TFS0100) and T2.
Formula Displayed temperature = measured temperature - zero point shift
Standard setting is off. That means 0.0° and that a zero point shift cannot take place.
The zero point shift is used primarily to compensate for sensor deviations. If a different
value than off is adjusted, it is displayed briefly when the device is switched on and in-
dicated by the Corr arrow in the display during operation.
Display correction factor
This factor only has an effect on the Typ-K input T2.
Formula [°C]: Displayed temperature = measured temperature * Corr
[°F]: Displayed temperature = (measured temperature - 32 °F) * Corr + 32 °F
Standard setting is off = 1.000
This factor is provided to compensate for thermal transition losses in surface measure-
ments. These occur when very high temperatures of objects should be measured, the
surface of which is cooled down by the cooler environment. Similar effects can also
occur with sensors with a greater mass. If a different value than off is adjusted, it is
displayed briefly when the device is switched on and indicated by the Corr arrow in the
display during operation.
Base address
Multiple products can be queried simultaneously via an interface using the GRS3105
interface converter. For this purpose, it is prerequisite that all products have a different
base address. If multiple products are connected together via an interface, the base
addresses must be configured accordingly.
Channel 1 of the product is addressed via the adjusted base address. Channels 2 to 6
have the following addresses.
Example Base address 21 + Channel 1 = 21
+ Channel 2 = 22
etc.
6.2 Measurements with the TFS 0100E combination
measuring probe
The TFS 0100 is specially developed for room climate measurement. TFS 0100
probes are not interchangeable without recalibration. It includes a sensor for measure-
ment of relative air humidity and a sensor for measurement of environmental temper-
ature T1.
6.2.1 Relative air humidity r.H.
Air humidity measured in the probe tip with 0.1% resolution.

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6.2.2 Environmental temperature T1
Temperature measured in the probe tip. 0.1°C or 0.1°F resolution. Additional display
values are calculated according to the Mollier diagram of the product:
6.2.3 Dewpoint temperature Td
Cold air can absorb less water vapour than warm air. Consequently, as the temperat-
ure decreases, the relative air humidity increases. If 100% is reached, the air is satur-
ated with water vapour, and additional cooling has the effect that part of the water va-
pour condenses into water and is visible as mist or precipitation (dew).
The dewpoint temperature indicates the temperature at which 100% saturation is
reached and from which dew should be expected.
6.2.4 Enthalpy h
Enthalpy indicates the energy content of the air. This value is based on dry air at 0 °C
and 0 % relative air humidity. In other words, air with 0 % relative air humidity and 0 °C
has the energy content 0 kJ/kg. The warmer the air is and the higher the relative air
humidity is, the greater the energy content will be. As a result, it is apparent that more
energy is required to heat up humid air than dry air.
NOTE
All display values calculated from the humidity and temperature measurements are
based on normal air pressure of 1013 mbar. The deviations for measurement of atmo-
spheric air are negligible. The values must be corrected based on suitable tables for
measurements in pressure vessels and similar equipment.
6.2.5 Surface temperature T2
Surface temperatures, etc. can be measured with the second temperature channel.
6.2.6 Dewpoint distance Δ Td
This measurement relates to measurements T1, T2 and the relative air humidity.
The environmental air is measured with the combination probe and the dewpoint Td is
calculated from its status.
Now surfaces in this environmental air can be measured with the surface probe,
wherein ΔTd indicates the temperature difference from the dewpoint.
Example:
The measurement of the room air provides a Td of 5 °C. As long as the surface tem-
perature of a pane is >5 °C (ΔTd is positive), the pane is not misted over. If the sur-
face temperature is less than 5 °C (ΔTd is negative), the pane will mist over.
Additional application examples:
Locating damp corners, monitoring of heat exchangers or weather forecasting.
6.3 Measurements with the STS 005 / STS 020 flow
measuring probes
There are two types of measuring probes available for measurement of flow speed:
– STS 005 measures the flow of water

6 | Bases for measurement GMH 3331
18 / 32 B-H77.0.01.DB2-1.0
– STS 020 measures the flow of air
When used incorrectly, the measurement result is unusable!
Observe maximum measuring ranges!
– STS 005: 0.05 .. 5.00 m/s (water)
– STS 020: 0.5 .. 20.00 m (air)
Higher speeds can destroy the measuring head or at least permanently impair the
measuring accuracy. The specified flow direction is marked with an arrow on the
measuring head.
Flow measuring probes are free-jet calibrated, i.e. the diameter of the flow channel to
be measured must be at least 5 times the diameter of the flow measuring head. Ap-
prox. 5 cm, otherwise there will be a measuring error of up to 40%!
When evaluating the measurement results, also observe that the flow speed in the
middle of a channel is higher than at the edge of the channel. There are relevant
tables for calculation of the airflow rate based on the flow speed.
6.3.1 Averaging processes for flow measurement
Significant measurement fluctuations usually occur with measurements of flows. Two
averaging processes can be integrated in order to display a stable measurement:
6.3.1.1 Continuous averaging
This displayed average is calculated from the last measurements over the time period
of the adjusted averaging time and displayed. After the device has been switched on,
the remaining time until the averaging time has expired is displayed in the lower dis-
play line. The Min and Max values are based on the smallest and largest displayed av-
erage.
6.3.1.2 Averaging at the push of a button (Average Hold)
After the product is switched on, it begins to generate the average of the flow meas-
urement for the duration of the averaging time. The current measurement appears in
the main display during the measurement and the remaining measuring time appears
in the secondary display. After the measurement is completed, the average is dis-
played and the product switches to HOLD mode. The Min and Max values are based
on the smallest and largest measurement while the average is being calculated.
The store button must be pressed to start a new measurement.
6.3.2 Additionally with optional Typ-K temperature probe on
T2
The temperature of the medium, for example, can be measured with temperature
channel T2. The unaveraged measurement is display.
6.4 Universal output
The output can be used as a serial interface (for USB 3100, USB 3100N, GRS 3100
or GRS 3105 interface converters). If the output is not required, it should be deactiv-
ated, OVT OFF. The battery consumption will be drastically reduced as a result.

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6.4.1 Interface
The product can be connected directly to a USB interface of a PC with a galvanically
isolated interface converter. Transmission takes place in a binary coded format and is
protected against transmission errors with elaborate safety mechanisms (CRC).
Software:
– Standard software packages are available for purchase online at www.grei-
singer.de.
– A Windows function library with program examples for development of custom
software is available for purchase, as well as the freely available interface descrip-
tion.
NOTE
The following measurement, alarm and range values output via the interface are al-
ways output based on the adjusted base address.
Supported interface functions:
Channel as-
signment
Code Name/function
123456
X X X X X X 0 Read current value
X X X 3 Read system status
X 12 Read ID number
1 1 1 1 1 1 22 Read Min. alarm limit
1 1 1 1 1 1 23 Read Max. alarm limit
2 32 Read configuration flag
2 160 Set configuration flag
X X X X X X 199 Read measurement type display
X X X X X X 200 Read minimum display range
X X X X X X 201 Read maximum display range
X X X X X X 202 Read display range unit
X X X X X X 204 Read display range decimal point
X 208 Read number of channels
X X 216 Read offset
X 218 Read correction factor
X 240 Sensor module reset
X 254 Read program identification
1 = Only possible when alarm is activated for the relevant channel.
2 = Available configuration flags 50: 0 = Logger off; 1 = Logger on.
= Available configuration flags 51: 0 = Manual logger; 1 = Cyclical logger.
6.4.2 Channel assignment
The assignment of channels depends on which temperature probe or sensor is con-
nected to the product.
TFS 0100E

6 | Bases for measurement GMH 3331
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Channel 1 Relative air humidity
Channel 2 Temperature T1
Channel 3 Temperature T2
Channel 4 Dewpoint temperature Td
Channel 5 Dewpoint distance Δ Td
Channel 6 Enthalpy h
STS 005 / 020
Channel 1 Flow speed
Channel 2 Not supported. (NoAck or error code)
Channel 3 Temperature T2
Channel 4 Not supported. (NoAck or error code)
Channel 5 Not supported. (NoAck or error code)
Channel 6 Not supported. (NoAck or error code)
Temperature probe Typ-K without TFS / STS
Channel 1 Not supported. (NoAck or error code)
Channel 2 Not supported. (NoAck or error code)
Channel 3 Temperature T2
Channel 4 Not supported. (NoAck or error code)
Channel 5 Not supported. (NoAck or error code)
Channel 6 Not supported. (NoAck or error code)