Dickson TH550 User manual

Digital Temperature, Humidity, Dew Point Monitor
Operation Manual

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Specifications
Range:
Temf)erature-
-22 to +122°F, (-30 to +50°C)
Humidity-
a to 95 0fo RH (non-condensing)
Dew Point-
-22 to + 122°F, (-30 to +50 ° C)
Resolution:
1 Ofo RH, 1o
Accuracy:
Temperature- ± 1.8°F (± 1.0° C)
Humidity-
±20fo RR from 0 to 60%, ±30fo RH
tram 61 to 950fo at+73 °F
Humidity Sensor:
Thin firm capacitor
Dew Point Accuracy:
±3.6°F (±2°C)
Instrument Anatomy
Wand
Temperature Sensor:
Tnermistor
Sample Rate:
Approx . 1 per se cond
Average Response Time:
5 seconds to move 600fo of full
scale in air moving I 5'/seco nd
Ambient Operating Conditions:
+32 to+ T22°F (Ol:o +50°C)
0
to 900fo RH (non- cond ensing)
Power Supply:
One 9V alkaline battery.
Battery life approx.
80nou rs .
Dimensions: 6.25" x 2.5" x 1.9"
( 160mm x 65mm x 45mm)
Probe Dimensions:
.92" diameter (23mmj . 5.9"
(149mm) long on a 6 (1 8 m)
cord
Weight: I Ioz. (.31 kg)
Sanda ---+!HI
Em bout
Lesekopf
Min/Max Key
Ba
ton de min./m ax
Touche Min/M ax
Taste
Min /Max
Hold Key --l§~~~~~
Baton de retenc ion
Touche hold
Taste Hold
Battery Compa rtment _j
Compartimiento de Ia pila
Compartiment
a' pile
Batteriefach
a
r1! If K •y
Baton de en ce nd id y c~p. r qc~do
T au h n/ ff
E in -/ Au
Rh/Dew Pt . Key
Baton de humed ad relat ivdlpu nto cle rocio
Touche
Rh /Dew
Taste Rh/D ew
• c; •F Key
Baton
de •c; •F
Touche •c;•F
Taste •c;•F
Strain Reli ef
Alivio de tension
Soulagement de Traction
Zugentl as tun g
5' Long Cord (I
5 ~ I ll !
Cordon de 154 c "' ( '• '
Gordon de 154 em dl' '"" !J
Spira/schnur, I ' 4 c r"
Operating Instructions
I. On/Off
Press to turn unit on or off.
2.
Set Celsius or Fahrenheit Mode
Press "°CfOF" key to choose Celsius
or Fahrenheit.
3.
Set Humidity or Dew Point Mode
Press "Rh/Dew" key to choose Humidity or Dew Point.
Note:
Dew Points below freezing should be converted to frost points.
•
4. Set Wand Position
, ,oF
• •
2YdP
•
Slide wand upward to first notch or remove wand completely from
cradle. Avoid breathing on or touching wand end as this could distort
readings.
5. Update Indicator
Karet moves up or down each time the unit
takes a new reading, approximat ely once every
second.
6. Hold
Press this key to lock in current reading. The
"Hold " symbol in the display w i ll light up,
indicating
that the instrument is in the "Hold"
mode. To resume reading, press the "Hold"
key again.
Ciil!i]
lB OF•
22rh
a

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Operating Instructions, Ctd.
7. Automatic Shutoff This instrument will
automat ically shut down after "" 34 minutes if
no keys are pressed.
8. Automatic Shutoff Override
You may override the automatic shutoff fea -
ture at startup by pressing
down the "Hold"
key. and the " On" key at the same time. The
letter '
T' will light up in the display, indicating
that the s
hutoff timer is in the override mode .
T
9. Minimum/Maximum
Press "Min/Max" once and the minimum val-
ues will be displayed for approximately 7 sec
onds.
Press "Mi n/Ma x" again during this time and
the r:na x imum values will be displayed for 7
seconds.
Press "Min/Max" a third time during this peri-
od and the unit will return to normal opera
tion.
Unit
will always return to normal operation
after 7 seconds
if no keys are pressed.
Note: Turning the unit off resets the minimum
and maximum values.
a
Minimum Display
Maximum Display
Battery Installation
Battery should be replaced as soon as possible
after
low battery indication to maintain rated
accuracy
of unit
Calibration
Your instrument was carefully tested
and calibrated before being
shipped from the factory.
Additional calibration
is not
required. However. should calibra-
tion be desired in the future.
follow
these procedures:
1. Identify a standard that
is more
accurate than this
unit Factory
supplied calibrati
on salts or elec-
tronic instruments recently cali-
brated
at a certified lab are rec-
ommended. Sling psychron-
meters
and instruments using
mechanical sensing elements
(human hair.
wood
elements. etc.) are NOT
recommended. These instru-
ments can be subject to great
inaccuracies
due to the nature of
mechanical measurement.
2. Place the probe of the unit into
the calibration salt capsule or
into a controlled environmental
chamber
and allow for complete
stabilization. For best results.
calibrate the
unit at levels typical-
ly monitored
during normal a
operation. Calibration in an
open room without the salt cap-
sule
or a chamber is not recom-
mended as temperature and
humidity can vary greatly within
a very small area.
3. To activate the calibration mode.
turn the
unit off . Now press the
"
On/Off' key and the "C/F" key at
the same time. A small "J " will
appear in
the display to indicate
you are in the calibration mode.
Step 3: Activating Calibration
Mode

-
Calibration, Ctd.
4. To lower the humidity or dew
point reading, press the
"RH/Dew" key. To raise the
humidity or dew point reading,
press the "Min/Max" key.
5. To lower the temperature read-
ing, press
the "Hold" key. To
raise the temperature reading,
press the "0C/°F" key.
6. When calibration is complete,
simply
turn the unit off to exit
the calibration
mode .
T emper ature
Down
Notes: This procedure allows for a
I0 digit change in readings. If
greater
change is required, there is
either a need for factory seNice or
the standard being used is inaccu-
rate.
For most accurate full scale calibra-
tion, factory seNice
is recommend-
ed.
Temperature Up
Keypad Functions in Calibration Mode
a
Troubleshooting
Problem
Inaccurate Reading
Display
won't change.
"E" appears in display
Display fad
ing
"Err" appears
LO BAT symbol appears
Probe exposed
to environments exceed ing
95% RH for exte nded period
Parts List
Solution
Allow indi ca tor to stabilize.
Check battery
power ILO BAT) .
Incorr
ect reference being u se d.
Out of ca li br at ion.
Check manual for calibration procedure.
Unit in "HOLD" mode (pre ss HOLD again) or is
locked
up (Turn indicator OFF, remove battery,
re-insta
ll battery & turn ON)
Component failure. Contact factory.
Weak battery. Cha
nge battery.
Bad cord co
nn ection or o ut of ra nge.
Pull
rubb er boots off wa nd and unit. ch ec k
for pr oper connections.
Check to see that environme
nt measured is
within ope rating range of unit---<:heck
manu al p.2- amb ient oper a ting conditions.
Repla ce battery
Probe sho
uld be dried out und er normal
ambient condition
s- Time required va ries
on temperature. RH & air fl ow
Some parts are easily replaced on site. Please refer to table below .
Description Part#
Accessories
Calibra ti on Kit (11 % and 75%1
AB34
NIST Traceable Certificat e, 3- oi nt * N3TH5
NIST Traceable
Ce rtificate,ULTIMA* N4TH5
*Must be requested when ordering. add one weeK to delivery time.
a

Factory Service and Returns
We recommend that damaged
instruments be returned to our
factory for complete repair. Before
returning any instrument or
package, please call for a
Return Authorization
(RAJ Number.
The Dickson Warranty
Dickson warrants that the TH550
will be free from defects in material
and workmanship for a period of
twelve months after delivery. In the
event of a claim under this warran-
ty, the product or part must be
returned to the factory for repair or
replacement (shipping prepaid)
with a Return Authorization
Number (See "Factory Service &
Returns
information above). It will
be repaired or replaced at Dickson's
option without charge.
When calling, please have the
following information available:
I . P.O.
number for out-of-
warranty units.
2. Serial number of unit.
3.
Model number of unit.
4. The problem you're
experiencing with unit.
The
foregoing warranty and
remedy are exclusive and in lieu
of all other warranties either
expressed
or implied.
Dickson shall
not be liable for conse-
quential
or incidental damages
resulting
from failure or malfunction
of its products. Products not
manufactured by Dickson
are excluded
from this
warranty.
Dickson manufactures a complete line
of temperature, humidity, air quality
& pressure instruments. Send
or call for a free catalog of Dickson products.
Toll Free 1-800-323-2448
DICKSON
The Leader In Recorders
930 South Westwood Avenue • Addison. IL 60I 0 I
Telephone
630-543-3747• Fax [phone]
MAN02 Revised
12/96
II
Especificaciones
lntervalos:
• Temperatura-
-300C a 50°(. (-22°F a I22°F)
• Humedad- 0 al 95% (sin con
densaci6n)
• Punto de rocio-
-300C a 50°(. (-22°F a I22°F)
• Resolucion:
I o/o de humedad relativa, I o
• Precision de laTemperatura:
±1°( (±1,8°F)
• Precision de Ia Humedad:
2% from 0 to 60%, ±3% from 61
to 95% RH 23°( (73°F)
• Precision del Punto de rocio:
2°( (3,6°F)
• Detector de humedad:
tipo capacitancia
• Detector de temperatura:
termistor
• Muestras: aproximadamente I
II
par segundo
• Fuente de alimentacion: una
pila alcalina
de 9 voltios. La
duraci6n de Ia pila es de unas
80 horas.
• lntervalo de operacion
ambiental (cuerpoJ:
ooc a 50°C {32°F a I22°F)
Oa 90% HR
• Tamano: I 59 x I59 x 48 mm
• Probe Dimensions:
92" diameter (23mm), 5, 9"
(149mm)
long on a 6' (183cm)
cord
• Peso: 0,31 Kg
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