Dickson THDx Podręcznik - Strona 5
Przeglądaj online lub pobierz pdf Podręcznik dla Rejestrator głosu Dickson THDx. Dickson THDx 9 stron. Temperature, humidity & dew point recorder
Drukuj stronęKeypad Operations
ON/OFF
MIN/MAX
DISPLAY
CHANGE
PEN
HOME
On/Off
When you press the "ON/OFF" key the pens will move to
the correct reading.
Alarm Set
The alarm set keys are labeled with arrows that point up
and down. You can set a minimum and maximum alarm
for both of the two variables you are recording.
1. To set the alarms press the "ALARM SET" key. The
MIN symbol will be displayed and the temperature
will flash. (Note: The alarm set function always
starts with temperature. If you do not want an
alarm to sound for temperature readings set the
alarms for points that are outside of the range.)
2. Use the up arrow button to increase the
minimum temperature alarm setting and the down
arrow to decrease the minimum temperature alarm
setting.
3. Press "ALARM SET" key a second time. The MAX
symbol will appear and the temperature will flash
indicating that you can now set the maximum
temperature alarm. Use the same procedure as in
step 2 above for setting the temperature maximum
alarm setting.
4. Press the "ALARM SET" key a third time and the
MIN symbol will appear and humidity (or dew
point dip switch #5 is on) will flash. Use the same
process as in steps 2 and 3 above to set humidity
and dew point alarm.
5. When you have set alarms for both variables press
"ALARM SET" a final time to lock in settings.
The defaults for alarm settings are:
Temperature: +40°F min to +110°F max
Humidity: 20% min, 80% max
NOTE: Alarm settings will return to the default when AC
power fails and there are no batteries installed for back-
up power.
ALARM
SET
ALARM
ON/OFF
Figure 3
Alarm ON/OFF
This button turns the alarms on and off. When alarms are
"ON" the alarm symbol appears on the display. When
alarm sounds it will sound audibly for approximately 1
minute and then it will stop. For a visual, the variable
that has moved outside of the minimum or maximum
points that you set will flash (i.e. if you set a maximum
alarm for +80°F and temperature reaches +80°F the
temperature portion of the display will flash).
MIN/MAX
1. Press the "MIN/MAX" key once and the minimum
values, during the recording time, will be displayed
for 7 seconds.
2. Press the "MIN/MAX" key again and the
maximum values, during the recording time, will
be displayed for 7 seconds.
3. Press the "MIN/MAX" key a third time during this
period and the display will show current readings.
The unit will always return to current readings
mode after 7 seconds.
NOTE: Turning the unit off resets the minimum and maxi-
mum values.
Pen Home
Press the "PEN HOME" key while the unit is operating
and the pens move to the outside of the chart. Press the
"PEN HOME" key again and the pens will return to cur-
rent reading points on the chart.
Display Change
Press the "DISPLAY CHANGE" key and the display will
temporarily show the reading opposite of what is being
recorded (i.e. if dip switch #5 is off and you are recording
the RH, pressing the "DISPLAY CHANGE" key will tempo-
rarily change the display to show the dew point reading).
NOTE: If the unit does not respond to keypad, check to
see that dip switch #8 is off.
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