TH800/02/03/05
Temperature & Humidity Recorder
www.DicksonData.com • 1-800-323-2448 • Fax 1-800-676-0498
Figure 2
TH802/03/05
Power
LED
Pen
Home
Pen
Home
On/Off
On/Off
Alarm
TH800
Power
LED
On/Off
The On/Off key turns the unit on and off.
Pen Home (Down Arrow)
If the pens are located on the outside edge of the chart,
press the
Pen Home
to move pen(s) to recording position.
If the pens are located on the chart, press the
Pen Home
key to move the pen(s) to the outside edge of the chart.
Alarm Optional
Pen 1: = Red Pen
Pen 2: = Blue Pen
1.
To set the alarm, make sure unit is on and press and
hold the
Alarm
button. The LED will blink red rapidly
for about five seconds, then the LED will turn solid
green. Release the
Alarm
button and the LED will
turn solid red. At this point the display will show “On”
or “Off”.
Pressing either the
Adjust-Up
or
Adjust-Down
buttons, located on the back of the unit next to the
dip switch, will toggle the alarm on or off.
2.
Pressing
PEN HOME
will scroll to the next alarm
options.
Alarm “on” or “off”
Figure 3
Adjust Buttons Dip Switches
Relay Contacts
(TH805)
AC
Adapter
Jack
Battery
Compartment
Pen 1 alarm minimum
Pen 1 alarm maximum
Pen 2 alarm minimum
Pen 2 alarm maximum
3.
In order to set pen alarm minimums and maximums,
pressing
Adjust-Up
will increase the alarm value,
and pressing
Adjust-Dowm
will decrease the alarm
value. There is acceleration if the
Adjust-Up
button
is held down.
Repetitively pressing the
Pen Home
button will
scroll through the five options until the alarm button
is pressed to exit from alarm adjust. Each press of
the
Pen Home
or
Alarm
button will store the new
settings. The unit will take one minute to exit
Alarm
Set Mode
once the
Alarm
button is pressed.
4.
If the alarm is triggered, the LED will show as solid
red and the alarm will sound. Press the
Alarm
button
to silence the audible alarm.
Alarm Relays
The SPST 24V 500mA relay contacts are normally open and
will close on alarm conditions when the alarms are enabled.
Relay contacts are always functional when the alarm is
enabled. The relay will close only during minimum and
maximum alarm conditions. Two pen models have 2 sets
of relay contacts which operate independently. Relays will
not operate under battery only power conditions.
Button Operations
Re
m
ot
e
RH P
ro
be
(T
H8
03
/0
5)
