BEKA BA678C, Руководство пользователя, Страница: 8 / 27

If the transmitter displays ‘LoC’ when the P and E
buttons are operated simultaneously, the transmitter
push buttons have been locked by a HART

command - see the the BA47X/67X Indicating
Temperature Transmitter HART

Interface Guide
which may be downloaded from
www.beka.co.uk/manuals.
6.1.2 Summary of functions
The functions that may be configured vary depending
upon the input selected.
Thermocouple and RTD inputs
The BA678C will always display sensor temperature.
Configuration allows:
Digital display units and resolution to be selected.
Bargraph display to represent required part of the
digital displayed range.
4/20mA output current to have required input
range.
Voltage and resistance inputs
The BA678C can display the voltage or resistance
input in any engineering units.
Configuration allows:
Zero and span of digital display to be adjusted.
Bargraph display to represent required part of the
digital displayed range.
4/20mA output current to have required input
range.
Each of the functions in the configuration menu is
summarised below, including a cross-reference to a
more detailed description.
Transmitter Summary
display of function
‘InPut’ Transmitter input
Selects o ne of the following inputs:
Thermocouple ‘tHC’
3 wire RTD
‘3rtd’
4 wire RTD ‘4rtd’
Differential RTD ‘d_rtd’
Voltage ‘Volt’
3 wire resistance
‘3rES’
4 wire resistance ’4rES’
See section 6.2.1
The content of the configuration menu depends upon
which transmitter input is selected, see following
summary and Figs 5, 6 and 7.
For Thermocouple Input – see Fig 5
Transmitter Summary
display of function
‘t.tYPE’ Thermocouple type
Selects 1 of 8 common types of
thermocouple.
See section 6.2.2
‘dEG’ Units of digital display
Selects 1 of 4 units of temperature.
See section 6.2.3
‘rESn’ Display resolution
Selects low or high display resolution.
See section 6.2.4
‘CJC’ Cold junction compensation
Turns thermocouple cold junction
compensation on or off.
See section 6.2.5
‘FAuLt’ Sensor fault analogue indication
Selects 1 of 3 under/over range output
currents to indicate that a sensor fault has
been detected. Analogue fault indication
may be disabled.
See section 6.2.6
‘CAL’ Configuration of 4/20mA output
Defines transmitter input at which
transmitter output is 4 & 20mA.
See section 7.2.7
‘bAr’ Configuration of bargraph display
Defines digital display at which bargraph
is zero and full scale.
See section 6.2.8
‘CodE’ Access code for configuration menu
Enters four digit configuration menu
access code. Default code 0000 disables
this function.
See section 6.2.9
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