Dickson Industrial THDx Manual - Halaman 4

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Halaman Cetak
Dickson Industrial THDx Manual
Charts
(for current pricing go to www.dicksonweb.com or call 1-800-323-2448)
Range
-20 to +120°F
+40 to +110°F
-20 to +50°C
+5 to +40°C
Accessories
(for current pricing go to www.dicksonweb.com or call 1-800-323-2448)
Description
NIST Traceable Calibration 3-pt. (new unit)
A2LA Accredited Calibration 3-pt. (new unit)
RH Calibration Kit (33% and 75%)
Pens (3 red/3 blue)
10' Probe Extension Cable
50' Probe Extension Cable
100' Probe Extension Cable
Carrying Case
Probe Dust Filter (see note)*
*to protect probe & increase life - please use dust filter in dusty environments or where RH exceeds 70%. Probe dust filter will slow down
response time.
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. Factory supplied calibration salt
capsules or electronic instruments recently calibrated
at a certified lab are recommended. Sling psychrom-
eters and instruments using mechanical sensing ele-
ments (human hair, wood elements, bimetals, etc.)
should not be used. NOTE: The unit does not have to
be recalibrated if you used a longer probe cord.
Calibrate Humidity/Dew Point (using a
controlled chamber)
1. Turn the unit on and use dip switch #5 to select
humidity or dew point (RH=#5 off, Dew
Point=#5 on). Use dip switch #3 to select °F or
°C (°F=#3 off, °C=#3 on).
2. To activate the calibration mode, turn the unit
off. Now press the "On/Off" key and the up
arrow key at the same time. The "UC" symbol
will appear in the display to indicate you are in
"User Calibration" mode.
3. Place the probe of the unit along with your
precision relative humidity/dew point instrument
(RH/Dew Point standards) into a controlled
environment chamber and allow 15 minutes for
the unit to stabilize. For best results, calibrate
the unit at levels typically monitored during
normal operation.
4. Match the THDx reading with your precision
RH/Dew Point instrument. To raise the RH/Dew
24 Hour Chart
C415
C476
C472
C478
Point reading, press the up arrow key. To lower
the RH/Dew Point press the down arrow key.
5. When calibrating is complete, simply press the
"On/Off" key to save calibration setting.
Calibrating in an open room, without the use of a
salt capsule or a chamber, is not recommended as
humidity can vary greatly within a very small area.
Calibrate Temperature
1. Press the "On/Off" key and the up arrow
simultaneously to enter the "User Calibration"
mode. Use dip switch #3 to select °F or °C.
(°F=#3 off, °C=#3 on). The display should read
"UC" in the upper right hand corner of the
display.
2. Place the THDx probe, along with your precision
temperature instrument (your temperature
standard) into a controlled environmental
chamber allowing both instruments to completely
stabilize for approximately 1 hour.
3. Match the THDx reading with your precision
temperature instrument.
4. To raise temperature reading, press the "Alarm
Set" key. To lower the temperature reading press
the "Alarm On/Off" key. Each key press adjusts
the reading by 1°F.
5. When calibration is complete, simply press the
"On/Off" key to save calibrated changes.
Calibration is stored in memory even after you turn
the unit off. User calibration information will not be
lost of AC power fails.
7 Day Chart
31 Day Chart
C417
C477
C473
C479
C480
C481
C482
C483
Order #
N300
N400
A834
P246
A860
A865
A866
A709
A867