TH800/02/03/05
Temperature & Humidity Recorder
www.DicksonData.com • 1-800-323-2448 • Fax 1-800-676-0498
Power
The
TH8
operates on AC power with an optional 4 AA
battery backup. Depending on chart rotation selected and
model; battery backup will last
TH802/03/05
24-Hour Chart Rotation = 1 Day Backup
7-Day Chart Rotation = 2 Day Backup
31-Day Chart Rotation = 1 Week Backup
Note:
Alarm and relays will not operate under battery
only power.
TH800
At 70°F
24-Hour Chart Rotation = 1 Month
7-Day Chart Rotation = 6 Months
At 32°F
24-Hour Chart Rotation = 3 Weeks
7-Day Chart Rotation = 4 Months
Note:
(Unit should not be placed in an environment
below 32°F)
LED Indicators
• AC Power with battery backup–Solid green
• AC Power with low battery or no battery–Blinks red
• Battery only–Blinks green
• Battery only (Low battery)–Solid red
Note:
TH800
operates on battery only and will blink
one time every minute to conserve battery life.
CALIBRATION
Your instrument was carefully tested and calibrated before
being shipped from the factory. For greatest accuracy, we
recommend factory re-calibration every 6–12 months. Call
customer service at (630) 543-3747.
If you wish to do calibration yourself, follow these
procedures.
1.
To activate Calibration Mode, turn the unit on
and press and hold both the
On/Off
button and
the
Adjust-Down
button (making sure to press the
Adjust-Down
button first so the unit will not turn
off). The LED will blink in amber rapidly for about
five seconds, and turn solid green. Release the
On/Off
button and the
Adjust-Down
button. The
LED will then blink amber at which point only the pen
being adjusted will show on the display.
2.
To raise the unit of measurement, press the
Adjust-Down
button. To lower the unit of
measurement, press the
Adjust-Up
button.
Pen home
switches between the red and blue
pens on a two-pen unit and stores the current
adjustment value.
3.
When calibration is complete, press the
On/Off
button. Calibration is stored in memory even after
you turn the unit off. User calibration information
will not be lost if AC power fails.
Note:
After two hours, if no buttons are pressed, the
unit will time out of user calibration and resume normal
operation. The user calibration is stored separately
from the factory calibration. If you wish to cancel out
your user calibration, simply enter
Calibration Mode
and
toggle through the steps without adjusting displayed
readings. Exit by pressing the
On/Off
button. You have
now restored factory calibration.
Note:
It is recommended that you use a controlled
chamber when calibrating temperature and humidity.
Calibrating in an open room is not recommended as
humidity can vary greatly within a very small area.
NEED TO KNOW
TH800 Pen Movement
The pen movement for the
TH800
is slower than on the
AC powered models in order to conserve battery power.
In 24-hour mode the pen will move every 1 minute and 30
seconds. In 7-day mode the pen will move every 8 minutes
and 30 seconds.
The recorder takes temperature readings every 50 seconds.
An average of the readings taken between pen movements
is what is drawn on the chart.
Pen Adjust
Pen adjust may be needed if the pen(s) and display do
not match.
1.
While the unit is on, press and hold both the
Pen
Home
button and the
On/Off
button (making sure to
press the
Pen Home
button first so the unit will not
turn off). The led will blink rapidly between amber
and green for about five seconds. The LED will then
turn green. Release the
Pen Home
and
On/Off
buttons. The LED will flash amber and green for one
second and the LED will turn off.
