WIKA D-11-7 - Manual (Page 20)

20 WIKA operating instructions pressure transmitter model D-1x-7
2478159.05 12/2011 GB/D/F/E
GB
Read temperature
The byte "Temperature value" contains the doubled temperature value in the unit °C.
The second most significant bit should be taken as the algebraic sign (0=positive, 1=negative).
Example
Instrument: D-10-7
Measuring range: -1 ... +2.5 bar
6. Commissioning, operation
Send message
Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7 Byte 8
Pressure
value MSB
with sign
Pressure
value LSB
Factor, unit Error status Error code Service
request
Service
response 1
Service
response 2
Measured value
Pressure value MSB/LSB: 0x9158
MSB = 1: Measured value negative
0x1158 = 4,440
dec
Factor/unit: 0x60
Measurement type: relative
Exponent: -4
Unit: bar
Pressure = -4,440 * 10 -4 bar
Pressure = -0.4440 bar
Error detection
Error status: 0x0A
No error,
The pressure transmitter is
working correctly
Services
Service request: 0x54
Temperature is transmitted
Service response 1: 0x00
Temperature positive
Service response 2: 0x41
0x0041 = 65
dec
Temperature = 65/2 = +32.5 °C