Display Summary of Programme Menu
functions
'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
'In-HI'
High input sub-menu
Enables the higher voltage input 'InPut'
and the corresponding display 'diSP' to
be defined.
See section 6.5.3
Other functions
'CAL'
Calibration of 4/20mA output
This sub-menu defines the relationship
between the transmitter 4/20mA output
and the transmitter display. 'ZEro'
defines the display at which the output
is 4mA, and 'SPAn' the display at which
the output is 20mA.
See section 6.6
'Cond'
Conditioning of internal references
WARNING!
Adjusting the internal
references will alter the
instrument performance. Do
not attempt to recalibrate these
references unless you have
adequate test equipment and
have read section 6.8
This sub-menu enables the internal
references to be calibrated against
external voltage, resistance and current
standards.
If the Trim Menu is used to calibrate the
transmitter, the internal references do
not require routine re-calibration.
See section 6.8
'COdE'
Security code
Defines a four digit numeric code which
must be entered to gain access to the
programme and the trim menus.
Default code 0000 disables the security
function and allows unrestricted access
to all functions in the programme and
trim menus.
See section 6.7
6.2 Description of Programme Menu functions
The following sections contains a detailed
description of each function in the Programme
Menu. They should be read in conjunction with the
summaries in section 6.1 and the programme
structure shown in Figs 7A and 7B.
6.2.1 Transmitter input 'InPut'
This function conditions the transmitter to accept a
thermocouple 'tHC', resistance thermometer 'rtd' or
a voltage 'UOLt' input. To define the transmitter
input select 'InPut' from the Programme Menu and
press
P
which will reveal the current setting. This
setting may be changed by scrolling through the
menu using the
Up
or
Down
buttons. When the
required input is displayed, pressing
P
will reveal a
sub-menu enabling the type of sensor to be
selected and associated parameters programmed.
6.3 For thermocouple inputs
6.3.1 Type of thermocouple 'tYPE'
After selecting a thermocouple input, pressing
P
will
reveal the 'tYPE' sub-menu which contains seven
different thermocouples:
Type Display Standard
E
E
BS4937 Part 6 : 1974
J
J
BS4437 Part 3 : 1973
K
h
BS4437 Part 4 : 1973
N
n
BS4437 Part 8 : 1986
R
r
BS4937 Part 2 : 1973
T
t
BS4937 Part 5 : 1973
Pallaplat
PALL
Pfaulder BA302e
Pressing
P
again will display the current type of
thermocouple which may be changed by scrolling
through the menu using the
Up
or
Down
buttons.
When the required type is displayed, press
E
to
return to the sub-menu.
6.3.2 Display units 'dEg'
The transmitter display may be in degrees
centigrade or Fahrenheit. To check or change the
display units select 'dEg' from the sub-menu and
press
P
to reveal the current setting. The setting
may be changed by pressing the
Up
or
Down
button. When the required units are displayed,
press
E
to return to the sub-menu.
6.3.3 Display resolution 'rESn'
The output of each type of thermocouple can be
displayed with high or low resolution as shown
below. Low resolution can improve the readability
of a noisy or rapidly changing display, but does not
degrade the performance of the 4/20mA analogue
output.
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