TH800/02/03/05
Temperature & Humidity Recorder
www.DicksonData.com • 1-800-323-2448 • Fax 1-800-676-0498
2.
Both pens will move to the outer edge of the chart,
and then the shorter red pen will move to the
current position. Use the
Adjust-Up
and
Adjust-
Down
buttons to move the pen to the maximum
temperature line on the chart. Once the shorter
red pen is set, the
Pen Home
button will move the
shorter red pen to the outer edge of the chart and the
longer blue pen will move to its current position. The
Adjust-Up
and
Adjust-Down
buttons will adjust
the longer blue pen position. Once the pen is set, the
Pen Home
button will move the longer blue pen to
the outer edge of the chart and the shorter red pen
will move to its new position. Each time pen home is
pressed the two pens will switch positions (moving
the most recently adjusted position) until the
On/
Off
button is pressed to exit pen adjust mode.
Note:
Pressing the
On/Off
button will exit the adjustment
and return the unit to normal operation. Each time the
Pen Home
or
On/Off
button is pressed, the adjustment
currently in progress will be stored. The unit will take one
minute to exit
Pen Adjust Mode
once the
On/Off
button
is pressed.
TROUBLESHOOTING
Why isn’t the chart keeping time or running slow?
• The chart may be “hung up” or restricted, possibly
caused by a rip on the outer edge of the chart or the
chart hub, or the chart may be caught between the
arm and pen arm platform.
• Incorrect chart installed for the selected chart speed.
Why did the chart stop turning?
• Chart hung up or restricted, (ripped chart)
• Unit may be “locked up”? This can be confirmed by
pressing any of the buttons on the keypad. If the
unit is locked up there will be no response to button
presses and the Chart Recorder may appear to be
working, but the readings won’t change. Also, the
chart will not rotate. Remove power and battery, and
then re-power.
Why don’t the display and chart match?
• Dip switches are set for a specific range, but using
chart for another range, or vice versa.
• Pen(s) not inserted on pen arm(s) all the way
• To adjust pen to match chart see
Pen Adjust
in the
Need to Know
section of this manual.
Note: TH800
does not have a display.
Why does calibration seem to be off?
• What is the tolerance of the unit it’s being compared to?
• It’s ok if the unit is within the sum of the two
tolerances.
• Has an outside calibration house attempted
calibration? It may not have been adjusted properly.
• Walk through calibration adjustment, found in
the manual
Why won’t the battery backup work?
• Are there good batteries in the Chart Recorder?
• Keep in mind that battery backup varies significantly
depending on temperature, pen movement and chart
rotation speed.
• If there was a momentary power outage (brown out),
the unit may not have had enough time to recognize
this and switch to
Battery Mode
. (The Chart Recorder
may lock up or shut off in this situation) This situation
may also occur if the unit is plugged into an outlet
that shares the circuit with other machinery that has
phase motors or compressors that cycle periodically.
As these other machines cycle, they momentarily have
a high current draw, therefore drawing from the unit.
Note: TH800
does not have a battery backup.
Why won’t the chart recorder respond to changes?
• Is the unit “locked up”? This can be confirmed by
pressing any of the buttons on the keypad. If the
unit is locked up there will be no response to button
presses and the unit may appear to be working,
but the readings won’t change. Also, the chart will
not rotate. Remove power and battery, and then
re-power.
Why won’t the unit power up?
• Remove the batteries and power adapter for a
minute or two, this will reset the unit. The unit should
respond when the adapter is plugged in.
Warranty
Dickson warrants that this line of instruments will be
free from defects in material and workmanship under
normal use and service for a period of twelve months
after delivery.
This warranty does not cover routine calibration and
battery replacement.
For
Specifications
and
Technical Support
go to
www.DicksonData.com