BEKA BA374C, Руководство пользователя, Страница: 10 / 27

Once within the programme menu the required
parameter can be reached by scrolling through the
functions using the
Up and Down push-buttons as
shown in Figs 7A and 7B. When returning to the
display mode following changes to any
parameters, the transmitter will display four
decimal points for a few seconds while the new
information is stored in permanent memory.
All new BA374C indicators are supplied calibrated
as requested at the time of ordering. If calibration
is not requested, the transmitter will be set for 3
wire RTD input with 4 to 20mA output correspond-
ing to a display of 0.0°C to 100.0°C.
6.1 Summary of Programme Menu functions
The parameters which may be programmed vary
depending upon which input is selected. For:
Thermocouple and resistance
thermometer inputs
The BA374C transmitter will always display
sensor temperature. Programming allows the
display to be in degrees Centigrade or Fahren-
heit, and for the display resolution to be
selected.
Zero and span of the 4/20mA output current
may be programmed to represent any display
range.
Voltage input
The display may be programmed to show the
input voltage in any engineering units.
Zero and span of the 4/20mA output current
may be independently programmed to repre-
sent any displayed value.
Each of the functions in the programme menu is
described in the following summary with a cross
reference to more detailed information. Figs 7A
and 7B illustrates the location of each function
within the menu.
Display Summary of Programme Menu
functions
'InPut' Transmitter input
Conditions the transmitter to accept
thermocouple 'tHC', resistance
thermometer 'rtd' or a voltage 'UOLt'
input.
See section 6.2.1
For Thermocouple Inputs
Display Summary of Programme Menu
functions
'tYPE' Sensor type
Selects the type of thermocouple input.
See section 6.3.1
'dEg' Units of display
Sets display to o C or o F.
See section 6.3.2
'rESn' Display resolution
Selects low or high display resolution.
See section 6.3.3
'CJC' Cold junction compensation
Turns thermocouple cold junction
compensation ON or OFF.
See section 6.3.4
'burn' Input open circuit drive
Selects up scale drive, down scale
drive or no drive when input is open
circuit.
See section 6.3.5
For Resistance Thermometer Inputs
'tYPE' Sensor type
Selects 3-wire, 4-wire or differential
Pt100 resistance thermometer input.
See section 6.4.1
'dEg' Units of display
Sets display to o C or o F.
See section 6.4.2
'rESn' Display resolution
Selects low or high display resolution.
See section 6.4.3
For Voltage Inputs
''d.P.' Decimal point
Positions the dummy decimal point
between any of the display digits or
turns it off.
See section 6.5.1
'In-LO' Low input sub-menu
Enables the lower voltage input 'InPut'
and the corresponding display 'diSP' to
be defined.
See section 6.5.2
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