E+E Elektronik EE355, Руководство пользователя

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User Manual EE355 Dew Point Sensor
6.2 Modbus Register Map
The measured data is saved as 32 bit floating point values (data type FLOAT) and as 16 bit signed integer
values (data type INTEGER). Depending on the measurement unit selected, the measurements are
saved in SI or US/GB units. Measurement unit selection is made by means of the ordering code or with
the help of the EE-PCS Product Configuration Software.
FLOAT 32 bit:
Parameter SI Unit US/GB Unit Register number 1) [Dec] Register address 2) [HEX]
Read register: function code 0x03 / 0x04
Temperature T °C °F 26 0x19
Relative humidity RH, Uw % RH % 28 0x1B
Water vapout partial pressure e’ mbar psi 30 0x1D
Dew point temperature Td °C °F 32 0x1F
Frost point temperature Tf °C °F 42 0x29
Volume concentration Wv ppm ppm 60 0x3B
INTEGER 16 bit:
Parameter SI Unit US/GB Unit Register number
1)
[Dec] Register address
2)
[HEX]
Read register: function code 0x03 / 0x04
State of auto-calibration
0 ... normal operation
1 ... auto-calibration active
501 0x1F4
Write register: function code 0x06
Modbus address (Slave ID) 1 0x00
RS485 Data Transmission 2 0x01
1) Register number starts from 1
2) Register address starts from 0
7 Maintenance
7.1 Filter Replacement
A contaminated filter cap should replaced by a new one. The order number for new filters is HA010103.
When replacing the filter, please note the following:
ƒ
Unscrew the filter cap very carefully to avoid damaging the sensing element.
ƒ
Handling the filter might clog the pores. Use gloves to screw on the new filter.
Filter cap
Sensing element
Fig. 7 EE355 Filter and Sensor
7.2 Cleaning the Sensing Element
Caution:
ƒ
Never touch the sensing elements.
ƒ
Any attempt to clean the sensing elements mechanically such as rubbing or brushing leads certainly
to their irreversible damage.
Please observe the E+E “Cleaning Instructions”.