LD4
LD3
LD2
LD1
SW3
SW2
SW1
DIS1
SW4
LK1
VR1
R8
R7
IC1
LK3
LK4
R6
R4
R5
R3
LK2
R2
R1
RESET
CAL
UP
DOWN
8195
70.01
1.6 THICK
70.01
6.0
3.0 RAD.
1
58.1
1
75.0
DISPLAY BOARD LAYOUT (Dimensions in millimetres)
DX600 OVERVIEW
Calibration is performed using the DX600 and is menu driven
and performed by the 3 calibration switches:
CAL
steps through the calibration menu in the order zero,
span and sensitivity (SW2).
UP
allows positive adjustment of the displayed value
(SW3).
DOWN allows negative adjustment of the displayed value
(SW1).
The menu is entered by pressing the CAL button, the value
adjusted by pressing the UP and DOWN buttons and the
resulting calibration constants are stored when the CAL button
is pressed again to step through the menu. Temperature
compensation is automatic and the temperature is measured
inside the associated IR600 series head. The sensitivity adjust is
used to provide a variable full-scale range, if the default range is
not appropriate.
The display/calibration board also contains the following:
*
An LCD display to show the output (DIS1).
*
A RESET pushbutton, used to clear any fault indications
and reset the CPU for a full restart (SW4).
*
A decimal point link to show or remove the decimal on the
displayed output (LK1).
*
A series of 3 links (of which only one is selected), to set the
full-scale output value to either 100, 2000 or 500 (LK2, LK3
and LK4).
*
Four status LEDs (LD1, LD2, LD3 and LD4)
*
A potentiometer for zeroing the display board (VR1).
*
An 8 x 2-way connector for attachment to the transmitter
board (PL1).
Changing the settings on the sensor select switches forces a
reset and erases any existing calibration data. If the RESET
button is pressed during the set span or set sensitivity
sequence, then the calibration data is erased. Whenever the
calibration data is invalid or erased, the transmitter forces a
calibration sequence by automatically entering the set zero
sequence after a reset or power up.
LED INDICATOR DESCRIPTION
The green LED indicator, labelled OK, indicates the system
condition as follows:
Green LED
Cause
OFF
Non-recoverable
fault,
system
not
functioning.
FLASHING @ 2 Hz
Initial startup and self-checking in
progress.
FLASHING @ 4 Hz
Normal functioning.
ON
Fault
designator
when
illuminated
along with the red F LED (see below).
The yellow Z LED indicator illuminates when in the set zero
mode. It is also used as a fault designator if the red F indicator
is also illuminated (see below).
The yellow S LED indicator illuminates when in the set span
mode. It is also used as a fault designator if the red F indicator
is also illuminated (see below).
The Red F indicator is used as the fault indicator with guidance
as to the source of the fault being indicated by the other LEDs
as follows:
DX600, page 2
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e2v technologies