Display Symbols - Dickson ET6 Manual De Funcionamiento

Power Supply & Pen Information
Transmitter/Sensor: A powered transmitter is
required to operate the ET6. Any powered transmit-
ter with a 4-20mA, 0-20mA, 0-5Vdc, 1-5Vdc output
signal may be used. To connect a transmitter to the
recorder, locate the terminal block(s) on the back
of the recorder (See "Instrument Anatomy" on p.3,
Fig.2). Connect the positive wire of the transmitter
to the positive terminal (right) of the recorder and
the negative wire of the transmitter to the negative
terminal (left) of the recorder. Tighten screws in
terminal block to hold in transmitter wires. Repeat
steps with second terminal block if using the ET6-2
pen model.
Pen: Hysteresis (a property that occurs when
tension is applied to an object) causes the pens to
move in increments across the chart as the sensor
readings change. However, the display readings
are not affected by the property of hysteresis. For
this reason the display provides smoother and faster
readings than the pen. At any given time there may
be a slight discrepancy in the positions of the pens
and the readings on the display.
For visual spot checks the display is the most accu-
rate but both are within the stated apecifications of
the unit (See "specifications" on page 2).
Alarm Relays
The SPST 24V 500mA relays contacts are normally
open and will close on alarm conditons when the
alarms are enabled. Relay contacts are always func-
tional when the alarm is enabled. Dip Switch #8
For compliance to CE directives do not remove the rubber cover
from the alarm relay terminals when the terminals are not used.

Display Symbols

Pens (2 pen ET6): The blue pen has a longer pen
arm than the red pen. The pens are offset to allow
the red pen to glide under the blue pen. The
blue pen indicates the correct time and the red pen
precedes it by 3/16 of an inch.
Power Supply: We recommend using AC power
with one 9V battery installed as a back-up power
source. This ensures that your recording will not be
interrupted when there is a power failure. The AC
adapter is built into the back of the recorder.
Note: When the unit is in battery back-up mode,
the recorder will update temperature readings at a
much slower rate. The battery should be replaced
once a year and after power failures of more than
a few hours.
To replace the battery:
1.
2.
3.
4.
(Optional)
has no affect on the relay. The relay will close only
during minimum and maximum alarm conditions.
2 pen units have two sets of relay contacts which
operate independently.
(Optional)
O
Zero calibration mode
A
Alarms enabled or alarm set mode
MIN
This symbol is displayed when you are setting a
minimum alarm or during a minimum alarm condi-
tion when alarms are enabled.
MAX
This symbol is displayed when you are setting a
maximum alarm or a maximum alarm condition
whan alarms are enabled. (Min and max flash
when the alarms are enabled and no alarm condi-
Figure 4
tion exists.)
1 - Channel one
2 - Channel two
4
Open the door of the recorder by depressing
the door latch.
Press the home key.
Lift the chart, if there is one present, to fully
expose the battery compartment and press
down on the tab to release battery
compartment door.
Replace 9V battery.
(two channel units only)