geo-FENNEL FHT 100 User manual

1. INTRODUCTION
The digital Humidity & Temperature Meter & Wet Bulb
Temperature Dew Point temperature has been designed to
combine the functions of Humidity Meter, Temperature Meter,
Wet Bulb Temperature and Dew point temperature.
It is an ideal Humidity & Temperature Meter Instrument with
scores of practical applications for laboratorial, industrial,
Engineer and professional use.
The Humidity & Temperature Meter is for use a humidity &
temperature semiconductor sensor. This operation manual
contains general information and specification.
2. FEATURES
Fast Response Time %RH: 10S (90% at 25@still air)
High Accuracy
Dew Point Temperature (-30@~100@/-22°F~199°F)
Wet Bulb Temperature ( 0@~80@/32°F~176°F)
Resolution 0.01%RH, 0.01@/0.01°F
Max Hold and Data Hold Function
Micro Processor-based Design
Dual Display Temperature & Humidity
Auto Power Off, Disable Sleep Mode
Backlight
Mini Size
Size (H*W*D): 225*45*34mm
Weight: 200g
3. SPECIFICATIONS
Display: Large 4-1/2 dual digital LCD display with backlight
Sensor Type: A single chip relative humidity and temperature
multi sensor module comprising a calibrated
digital output.
Response Time: %RH:10S (90% at +25@still air)
Accuracy Note: Accuracy is specified for the following
ambient temperature range: 64 to 82°F (18
to 28°C)
Sampling Rate: 2.5 samples per second
Polarity: Automatic, (-)negative polarity indication.
Over-range: “OL” mark indication.
Low Battery Indication: The “ ” is displayed when the
battery voltage drops below the
opera-ting level.
Operating Conditions: 32 to 104
o
F (0 to 40
o
C); < 80% RH
non-condensing
Storage Conditions: 14 to 140
o
F (-10 to 60
o
C); <80% RH
non-condensing
Auto Power Off: Meter automatically shuts down after
approx.15 minutes of inactivity (Sleep
Mode)To override Auto Power Off function (Non-Sleep Mode): Firstly
press hold/backlight button, then press power button. After the full
display appears, release both buttons. lcon“ ” will not shown
on the LCD. The unit will not auto power off now.
Power: One standard 9V, NEDA1604 or 6F22 battery.
Dimensions/Wt.: 225 (H) x 45 (W) x 34 (D) mm/200g

Humidity / Temperature Measurement Range:
Humidity: 0%~100%RH
Temperature: –30@~ 100@, -22Ｒ~ 199Ｒ
Resolution : 0.01% RH, 0.01@/Ｒ.
Humidity Accuracy: + 2%RH (at 25@, 20%Ｅ80% RH).
+2.5%RH (at other ranges)
Note: The measuring range is from 0% to 100%, but above
80% and below 20% the deviation is not specified.
Air Temperature Accuracy: + 0.5@/+ 0.9Ｒ(at 25@)
+ 0.8@/+ 1.5Ｒ(all other ranges)
4. PANEL DESCRIPTION
DewPo int
Wet B ulb

p
pp
pHumidity / Air Temperature Probe : Humidity & and
Temperature Semiconductor Sensor inside.
q
qq
qLCD Display: 4-1/2 dual digits LCD display with units of
@, Ｒ, %RH dew point, wet bulb and low battery “BAT”
MIN /MAX HOLD, indication.
r
rr
r MAX/ MIN Button: Press MAX/MIN button to enter MAX, MIN
Recording mode (manual range only ). Select the proper range
before selecting MAX MIN to ensure that the MAX/MIN reading
will not exceed the testing range. Press once to select MIN.
Press again to select MAX. Press and hold the Button for over 2
second to turn off MAX, MIN Recording.
s
ss
sＲ
ＲＲ
Ｒ,@
@@
@, Dew Point＄
＄＄
＄Wbt Select Button: Press Ｒ,@, Dew
Point＄Wbt select Button to enter select Ｒ,@,Dew Point,
Wet Bulb Measurement.
WET BULB is the evaporation temperature at the current
humidity. DEW POINT is the temperature at which humidity
condenses.
t
tt
t!
!!
!Power ON/OFF Button: Turn the meter power ON/OFF.
u!HOLD /Backlight Button: Press Hold/backlight Button to
enter hold function. The reading will be held when Data
Hold button is pressed. Press Hold/backlight Button for
over 2 seconds to turn on or off backlight function.
v
vv
v!
!!
!Battery Compartment
5. HUMIDITY AND AIR TEMPERATURE
MEASUREMENTS
1. Hold the probe in the area to be tested & allow
adequate time for readings to stabilize.
2. Press Ｒ,@, dew point, WBT select Button to enter
select Ｒ,@, dew point Wet Bulb Measurement.
3. Read the Relative Humidity and Air Temperature, dew
point temperature wet bulb temperature.
NOTE:
Do not immerse the probe in liquid; it is intended for use in air
only.
Warning:
Don’t expose the sensor to direct sunlight ( in solation ).
Don’t touch or manipulate the sensor.
6. BATTERY REPLACEMENT
If the sign “ ” appears on the LCD display, it indicates
that the battery should be replaced. Open the battery case
and replace the exhausted battery with new battery. (1 x 9V
battery NEDA 1604, 6F22 or equivalent).

INSTRUCTION MANUAL
Humidity & Temperature Meter &
Wet Bulb Temperature
Dew Point Temperature
FHT100
De wP oin t
Wet Bulb
TABLET OF CONTENTS
TITLE
1. INTRODUCTION
2. FEATURES
3. SPECIFICATIONS
4. PANEL DESCRIPTION
5. HUMIDITY AND AIR TEMPERATURE
MEASUREMENTS
6. BATTERY REPLACEMENT