GANN RH-T 37 BL flex User manual

1
RH-T 37 BL
Operating Instructions
Version 2.2
Active Electrode
RH-T 37 BL
RH-T 37 BL flex

2
RH-T 37 BL
Table of Contents
0.1 Publication Statement........................................................4
0.2 General Notes ...................................................................5
0.3 WEEE Directive 2002/96/EC Law on Electrical and
Electronic Equipment.........................................................6
1Introduction.......................................................................... 7
1.1 Description.........................................................................7
1.2 Device Layout....................................................................8
1.3 Display Symbols................................................................9
2Basic Functions................................................................. 10
2.1 Display in Measuring Menu ............................................. 10
2.2 Setting Menu ................................................................... 11
2.2.1 Measuring Menu (Main Menu)............................ 11
2.2.2 Measuring Mode Selection Menu (Ring Menu) .. 12
2.2.3 Maximum Value Display..................................... 15
2.2.4 Minimum Value Display...................................... 16
2.2.5 Memory Menu .................................................... 17
3Specifications..................................................................... 18
3.1 Technical Data................................................................. 18
3.2 Prohibited Environmental Conditions............................... 19
3.3 Measuring Ranges .......................................................... 19
3.4 Storage conditions........................................................... 19

3
RH-T 37 BL
4Application Notes .............................................................. 20
4.1 Measuring Air Humidity ................................................... 20
4.1.1 Absolute Humidity............................................... 20
4.1.2 Moisture Saturation ............................................ 20
4.1.3 Relative Air Humidity.......................................... 21
4.1.4 Equilibrium Moisture Content (EMC).................. 21
4.1.5 Water Activity (WA) ............................................ 21
4.1.6 Wet-bulb Temperature........................................ 21
4.1.7 Enthalpy ............................................................. 23
4.2 Measuring the Temperature ............................................ 24
4.2.1 Dew Point Temperature...................................... 25
4.2.2 Dew Point Dependent on the Air Temperature and
the Rel. Humidity for Condensation Calculation. 26
4.3 Handling the Hydromette................................................. 27
4.4 Sorption Isotherms .......................................................... 27
4.4.1 Building and Insulation Materials........................ 31
4.4.2 Wood.................................................................. 36
5Appendix ............................................................................ 38
5.1 Material Table.................................................................. 38
5.2 References...................................................................... 39
5.3 General Concluding Remarks.......................................... 39

Introduction
4
RH-T 37 BL
0.1 Publication Statement
This publication replaces all previous versions. It may not be
reproduced in any form or processed, duplicated or disseminated
using electronic systems without the written permission of Gann
Mess- u. Regeltechnik GmbH. Subject to technical and
documentary changes. All rights reserved. This document was
prepared with the required care. Gann Mess- u. Regeltechnik
GmbH accepts no liability for errors or omissions.
GANN Mess- u. Regeltechnik GmbH, Gerlingen, Germany.
07/11/2014

Introduction
5
RH-T 37 BL
0.2 General Notes
This measuring device fulfils the requirements of the applicable
European and national directives (2004/108/EC) and standards
(EN61010). Appropriate declarations and documentation are held
by the manufacturer. To ensure trouble-free operation of the
measuring device and operational reliability, the user must carefully
read the operating instructions. The measuring device may only be
operated under the climatic conditions specified. These conditions
can be found in Chapter 3.1 "Technical data". This measuring
device may likewise only be used under the conditions and for the
purposes it was designed for. Operational reliability and
functionality are no longer ensured if the device is modified or
adapted. Gann Mess- u. Regeltechnik GmbH is not liable for any
damage arising from such modifications or adaptations. The risk is
borne by the user alone.
Using appropriate means, make always sure that there
are no electrical cables, water pipes, or other utility lines at
the location, at which the measurement is to be carried
out.
The device must not be stored or operated in aggressive
air or air containing solvents!
Material that is frozen or has wet surfaces cannot be
measured.
The notes and tables in these instructions on permitted or
normal humidity conditions in practice and the general
definitions of terms have been taken from the specialist
literature. No responsibility can therefore be taken by the
manufacturer for the correctness of this information. The
conclusions to be drawn from the measurement results
are related to the individual conditions and the knowledge
drawn from professional experience for each user.

Introduction
6
RH-T 37 BL
The measuring device may be operated in residential and
commercial areas, as the stricter class B for emitted
interference (EMC) has been adhered to.
The device may not be operated in the immediate area of
medical equipment (heart pacemakers, etc.).
The measuring device may only be properly used as
described in these instructions. Keep the device and
accessories out of the reach of children!
Measurements must not be carried out on metallic
surfaces.
Gann Mess- u. Regeltechnik GmbH accepts no liability for damage
resulting from non-adherence to the operating instructions or by not
taking proper care during transport, storage or operation of the
device, even if this requirement for care is not specifically
addressed in the operating instructions.
0.3 WEEE Directive 2002/96/EC Law on Electrical and
Electronic Equipment
Disposal of packaging, battery, and device must be undertaken in
accordance with the legal requirements at a recycling centre.
The device was manufactured after 1 Mai, 2010

Introduction
7
RH-T 37 BL
1 Introduction
1.1 Description
The active electrode TH-T 37 BL is a precise thermo-hygrometer
for quick measurement of relative air humidity and air temperature.
Using programmed sorption-isotherms, the weight and mass
percentages can be determines for various building and insulation
materials, as well as hardwoods and softwoods.
The model flex has a flexible sensor tube (6.55mm diameter, swan
neck) and is therefore excellent for measurements of points that
are difficult to access.
The RH-T 37 BL is eminently suited to moisture analyses, damage
evaluation, dehumidifying buildings and checking the readiness of
floor and wall coatings.

Introduction
8
RH-T 37 BL
1.2 Device Layout
Sensor
Hydromette BL UNI 10
Handle

Introduction
9
RH-T 37 BL
1.3 Display Symbols
Main menu symbols
Air humidity in %
Measured value is held;
ready for measurement
Temperature in °C
Dew point (Dp) in °C
Other symbols
Min/Max display
Air humidity in %
Dead battery
Temperature in °C
Memory location 1

Basic Functions
10
RH-T 37 BL
2 Basic Functions
2.1 Display in Measuring Mode
Measured value in %
"Hold" symbol signals readiness to
make a measurement
Measured temperature in °C
Calculated dew point (Dp)
in °C
A measurement is started by pressing the "M" button. During the
measurement process, the "%" symbol blinks and the values adapt
to the surrounding conditions. After releasing the "M" button, the
"%" symbol is displayed steadily and the "Hold" symbol also
appears.
The device is now in Ready mode.
Press the "M" button again to start a new measurement.
Approx. 40 seconds after releasing the measurement button, the
device switches itself off automatically to save battery power. If the
device is switched on again, the last value measured is shown on
the display.
Figure 2-1: measuring mode