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Operating Information
Pen(s): Hysteresis (a property that occurs when ten-
sion 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 descrepancy in the position of the pen
and the reading on the display.
For visual spot checks the display is the most accu-
rate but both are within the stated specifications of
the unit. (See "Specifications" on page 2).
Pens (2 Thermocouple Units): 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.
Probe: One or two submersible K thermocouple
probe(s) is supplied with your unit. These probe(s)
may be used as disposable attachment and
re-ordered when needed.
Alarm Relays (Optional)
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 (Optional)
C
Indicates °C
F
Indicates °F
O
Zero calibration mode
A
Alarms enabled or alarm set mode
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.
Open the door of the recorder by depressing
the door latch.
2.
Press pen home key.
3.
Lift the chart, if there is one present, to fully
expose the battery compartment and press
down on the tab to release battery compart-
ment door.
4.
Replace 9V battery.
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.
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 condition exists.)
1 - Channel one
Figure 4
2 - Channel two
4
(two channel units only)
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