GREISINGER EBHT EASYBus Sensor Module Instruction Manual

: June 13, 2024
: GREISINGER

GREISINGER EBHT EASYBus Sensor Module

Intended Use

The device measures the relative humidity and temperature of air or non corrosive / non ionizing gases.
From this values others can be derived and displayed instead of the rel. humidity.
Field of application

Room climate monitoring
Monitoring of storage rooms etc…

The safety instructions (see chapter 3) have to be observed.
The device must not be used for purposes and under conditions for that the device had not been designed.
The device must carefully dealt with and has to be used according to the specifications (do not throw, knock, etc.). It has to be protected against dirt.
Do not expose the sensor to aggressive gases (like ammonia) for longer time.
Avoid condensation, as after drying there may remain residues, which may affect the precision negatively.
In dusty environment additional protection has to be applied (special protection caps).

General Advice

Read through this document attentively and make yourself familiar to the operation of the device before you use it. Keep this document in a ready-to- hand way in order to be able to look up in the case of doubt.

Safety Instructions

This device has been designed and tested in accordance to the safety regulations for electronic devices.
However, its trouble-free operation and reliability cannot be guaranteed unless the standard safety measures and special safety advises given in this manual will be adhered to when using it.

Trouble-free operation and reliability of the device can only be guaranteed if it is not subjected to any other climatic conditions than those stated under “Specification”.
Transporting the device from a cold to a warm environment condensation may result in a failure of the function. In such a case make sure the device temperature has adjusted to the ambient temperature before trying a new start- up.
General instructions and safety regulations for electric, light and heavy current plants, including domestic safety regulations (e.g. VDE), have to be observed.
If device is to be connected to other devices (e.g. via PC) the circuitry has to be designed most carefully.
Internal connection in third party devices (e.g. connection GND and earth) may result in not-permissible voltages impairing or destroying the device or another device connected.
Whenever there may be a risk whatsoever involved in running it, the device has to be switched off immediately and to be marked accordingly to avoid re-starting. Operator safety may be a risk if:
– there is visible damage to the device
– the device is not working as specified
– the device has been stored under unsuitable conditions for a longer time
In case of doubt, please return device to manufacturer for repair or maintenance.
Warning : Do not use this product as safety or emergency stop device or in any other application where failure of the product could result in personal injury or material damage.
Failure to comply with these instructions could result in death or serious injury and material damage.

Disposal Notes

This device must not be disposed as “residual waste”.
To dispose this device, please send it directly to us (adequately stamped).
We will dispose it appropriately and environmentally friendly.

Assignment

2-wire connection for EASYBus, no polarity, at terminals 1 and 2

Dimension

Display Functions

(only available for devices with option …-VO)

Measuring display

During normal operation the selectable humidity display value is displayed alternating to the temperature in [°C] or [°F].
display of selectable humidity value display temperature

If the relative humidity in [%] should be shown, although other display is selected (e.g. dew point temperature, mixing ratio…):
press ▼ (middle key) and ▲ (right key) simultaneous: display changes between „r.H.„ and measurand

Min/Max Value Memory

Note : the keys will be accessible by removal the cover.
watch Min values (Lo) : press ▼ (middle key) shortly once display changes between „Lo„ and Min values
watch Max values (Hi) : press ▲ (right key) shortly once display changes between „Hi„ and Max values
restore current values : press ▼ or ▲ once again current values are displayed
clear Min-values : press ▼ for 2 seconds Min values are cleared. Display shows shortly „CLr„.
clear Max-values : press ▲ for 2 seconds Max values are cleared. Display shows shortly „CLr„.

Usage of Unit-Labels

Min/Max Alarm Display

Whenever the measured value is exceeding or undershooting the alarm-values that have been set, the alarm-warning and the measuring value will be displayed alternating.
AL.Lo the lower alarm boundary is reached or is undershot
AL.Hi the upper alarm boundary is reached or is exceeded

Error And System Messages

Display	Description	Possible fault cause	Remedy
Err.1	Measuring range exceeded	Wrong signal	Temperature above 70°C not

Configuration Of The Device

Configuration via interface

The configuration of the device is done by means of the PC-software EASYBus- Configurator or EBxKonfig.
The following parameters can be changed:
– Adjusting of humidity and temperature display (offset and scale correction)
– Setting of the alarm function for humidity and temperature
The adjusting by means of offset and scale is intended to be used to compensate errors of the measuring’s.
It is recommended to keep the scale correction deactivated. The display value is given by following formula:
value = measured value – offset
With a scale correction (just for calibration laboratories, etc) the formula changes:
value = (measured value – offset) * ( 1 + scale adjustment/100)

Configuration at the device (only available for device with option …-VO)

Note : If EASYBus sensor modules are operated by a data acquisition software, there can be problems if the configuration is changed during a running acquisition. Therefore it is recommended not to change configuration values during a running recording and furthermore to protect it against manipulation by unauthorised persons. (please refer to right picture)

Follow these instructions to configure the functions of the device:

Press key 1 (SET) until the first parameter UNIT appears in the display
If a parameter should be changed, press key 2 (▼) or key 3 (▲),
The device changed to the setting – edit with ▼ or ▲
Confirm the value with 1 (SET).
Jump to the next parameter with 1 (SET).

Parameter	value	information
SET	▼ and ▲
Unit and Range of humidity display factory setting: rel.H
reL.H	0.0 100.0 % relative air humidity
F.AbS	0.0 … 200.0 g/m3 absolute humidity
FEU.t	-27.0 … 60.0°C wet bulb temperature
t.d.	-40.0 … 60.0°C dew point temperature
Enth	-25.0 … 999.9 kJ/kg Enthalpy
F.G.	0.0 … 640.0 g/kg Mixing ratio (atmospheric humidity)
Unit of temperature displays factory setting: °C
°C	Temperatures in °Celsius
°F	Temperatures in °Fahrenheit
*Offset correction of humidity measuring )**
oFF	deactivated ( factory setting)
-5.0 … +5.0	Selectable from -5.0 to +5.0 % rel. humidity
*Scale correction of humidity measuring )**
oFF	deactivated ( factory setting)
-15.00 … +15.00	Selectable from -15.00 to +15.00 % scale correction
*Offset correction of temperature measuring )**
oFF	deactivated ( factory setting)
-2.0 … +2.0	Selectable from -2.0 to +2.0 °C
*Scale correction of temperature measuring )**
oFF	deactivated ( factory setting)
-5.00 … +5.00	Selectable from -5.00 to +5.00 % scale correction
Altitude input (not at all units available) factory setting: 340
-500 … 9000	-500 … 9000 m selectable
Min. alarm-point for humidity measuring
-0.1 … AL.Hi	Selectable from: -0.1 %RH to AL.Hi
Max. alarm-point for humidity measuring
AL.Lo … 100.1	Selectable from: AL.Lo to 100.1 %RH
Alarm-delay for humidity measuring
oFF	deactivated ( factory setting)
1 … 9999	Selectable from 1 to 9999 sec.
Min. alarm-point for temperature measuring
Min.MB … AL.Hi	Selectable from: min. measuring range to AL.Hi
Max. alarm-point for temperature measuring
AL.Lo … Max.MB	Selectable from: AL.Lo to max. measuring range
Alarm-delay for temperature measuring
oFF	deactivated ( factory setting)
1 … 9999	Selectable from 1 to 9999 sec.

Pressing SET again stores the settings, the instruments restarts (segment test)

Please note : If there is no key pressed within the menu mode within 2 minutes, the configuration will be cancelled, the entered settings are lost!
) if higher values are needed, please check sensor, if necessary return to manufacturer for inspection.
Calculation: corrected value = (measured value – Offset) (1+Scale/100)

Notes To The Calibration Services

Calibration certificates – DKD-certificates – other certificates:
If device should be certificated for its accuracy, it is the best solution to return it with the referring sensors to the manufacturer. (please state desired test values, e.g. 70 %RH)
Only the manufacturer is capable to do efficient recalibration if necessary to get results of highest accuracy!
Humidity transmitters are subject to ageing. For optimum measuring precision we recommend a regular adjusting at the manufacturer (e.g. every 2nd year). Cleaning and checking of the sensors is part of the service.

Specification

Display ranges humidity| Relative air humidity: 0.0. 100.0 %RH

Wet bulb temperature: -27.0 … 60.0 °C (or -16,6 … 140,0 °F)

Dew point temperature: -40.0 … 60.0 °C (or -40,0 … 140,0 °F)

Enthalpy: -25.0…. 999.9 kJ/kg

Mixing ratio (atmospheric humidity): 0.0…. 640.0 g/kg

absolute humidity: 0.0…. 200.0 g/m3

---|---
Recommended humidity measuring range| Standard: 20.0 … 80.0 %RH
Option “high humidity”: 5.0…. 95.0 %RH
Working range of humidity sensor:

Meas. range temperature| -25.0 … 70.0 °C or -13.0…. 158.0 °F
Accuracy Display| (at nom. temperature 25°C)
Rel. Air humidity: ±2.5 %RH (within recom mended measuring range)
Temperature: ±0.4% of meas. value. ±0.3°C
Media| Non corrosive gasses
Sensors| capacitive polymer humidity sensor and Pt1000
Temperature compensation| automatic
Meas. frequency| 1 per second
Adjusting| Digital offset and scale adjustment for humidity and temperature
Min-/Max-value memory| Min and max measured values are stored
Output signal| EASYBus-protocol
Connection| 2-wire EASYBus, polarity free
Busload| 1.5 EASYBus-devices
Display (only with option VO)| approx. 10 mm high, 4-digit LCD-display
Operating elements| 3 keys
Ambient conditions Nom. temperature Operating temperature
Relative humidity Storage temperature| 25°C
Electronics: -25 … 70 °C
Electronics: 0 … 95 %RH (not condensing)
-25 … 70 °C
Housing| ABS (IP65, except sensor head)
Dimensions| 70 x 70 x 28 mm
Mounting| Holes for wall mounting (in housing – accessible after cover has been removed).
Mounting distance| 60 mm, max. shaft diameter of mounting screws is 4 mm
Electrical connection| 2-pin screw-type terminal, max. wire cross section: 1.5 mm²
EMC| The device corresponds to the essential protection ratings established in the Regulations of the Council for the Approximation of Legislation for the member countries regarding electromagnetic compatibility (2004/108/EG).
In accordance with EN 61326-1 : 2006, additional errors: <1 % FS.
When connecting long leads adequate measures against voltage surges have to be taken.