Center C317 User manual
TITLE PAGE
1. Introduction.......................................1
2. Specifications....................................1
3. Symbol Definition and Button
Location.............................................2
4. Operating Instructions......................3
4.1 Power-Up........................................3
4.2 Selecting the Temperature Units....3
4.3 Data-Hold Operation.......................3
4.4 DP/WB/Ambient Temperature
Operation.........................................3
4.5 MAX/MIN Operation........................4
4.6 Auto Power Off ...............................4
4.7 Backlight On/Off..............................4
4.8 Low Battery Condition.....................4
4.9 Battery Replacement ......................5
C O N T E N T S
Humidity Temperature Meter
-1-
1. Introduction:
This instrument is a digital meter that measures
relative humidity and temperature. Through the
easy to use control, the meter can show the
ambient temperature, the wet bulb temperature
and the dew point temperature.
2. Specifications:
Display: Dual display.
Measurement Range:
Humidity: 0%RH ~ 99%RH
Temperature: -20°C ~ 60°C (-4°F ~ 140°F)
Wet Bulb Temperature Range:
-20°C ~ 60°C (-4°F ~ 140°F)
Dew Point Temperature Range:
-20°C ~ 60°C (-4°F ~ 140°F)
Accuracy: (at 23°C)
Range Accuracy
10% RH ~ 90% RH ±2.5% RH
<10%RH, >90%RH ±5.0% RH
-20°C ~ 60°C ±0.8°C
-4°F ~ 140°F ±1.5°F
Resolution: 0.1%RH , 0.1°C /0.1°F
Response Time: (@ t90; in slowly moving air)
Humidity: 60 sec
Temperature: 10 sec
Sensor hysteresis:
< ±1.5% RH with excursion of 90% to 10% to
90%.
Temperature Coefficient:
0.1 X (specified accuracy)/ °C(<23°C or >23°C)
Operating Conditions:
Temperature: -20°C~60°C
Humidity: 0°C~55°C
Storage Conditions: -10°C~60°C;<70% RH
Sample Rate: 2.5 times per second
Battery: 4 eachAA/R6 batteries
Humidity Temperature Meter
-2-
Battery Life:
200-hours continuous (with alkaline battery)
Dimension: 204x65x45 mm; 8.0x2.6x1.7 inches
Weight: Approx. 230g
Accessories:
Batteries, instruction manual, carrying case
3. Symbols and Buttons:
WBMIN DP
4
5
10
6
2
3
1
8
9
7
cSensor hON/OFF button
dDust cover i°C/°F select button
eLCD display jBacklight
fHOLD button kDP/WB/Ambient
Temperature button
gMAX/MIN button ○
10 Battery cover
Humidity Temperature Meter
-3-
LCD Definition:
4. Operation Instructions:
4.1 Power-Up:
Press the ○
Ibutton to turn the
Humidity/Temperature meter ON or OFF.
4.2 Selecting Temperature Units:
When the meter is first powered on, the default
scale setting is set to the Celsius (°C ) scale. To
change to Fahrenheit (°F) press the °C/°F button.
Press again to revert to Celsius. The next time
the meter is turned on, the scale setting will be
the same as it was when you powered off last
time.
4.3 Data-Hold Operation:
The present reading may be held on the display
by pressing the HOLD button. When the held
data is no longer needed, release the data-hold
operation by pressing the HOLD button again.
When the meter is in the Data Hold mode, the
MAX/MIN,and °C/°F buttons are disabled.
4.4 DP/WB/Ambient Temperature Operation:
The Meter displays ambient temperature when
first turned on. To display dew point(DP)
temperature, press WB/DP button once. Press
DP/WB button again to switch to wet bulb (WB)
temperature. Pressing DP/WB button a third time
returns the Meter to ambient temperature. The
display indicates when dew point and wet bulb
temperature are selected.
Maximum
Indication
Minimum Indication
Low batter
y
Indication
Readin
g
Indication
Data Hold
Indication
Unit
Indication
Unit
Indication
Reading Indication
Dew point & Wet bulb
temperature Indication
A
uto powe
r
off
Indication
Humidity Temperature Meter
-4-
4.5 MAX/MIN Operation:
Pressing the MAX/MIN button places the meter in
the MAX/MIN mode. Under this mode the
maximum value and minimum value are kept in
the memory simultaneously and updated with
every new data reading.
Pressing the MAX/MIN button will display the MAX
indicator and the Maximum value on the display.
Pressing MAX/MIN button again will display the
MIN indicator and the Minimum value on the
display. Pressing MAX/MIN button again causes
the MAX and MIN indicators to blink together. This
means that these data have been updated in the
memory and the reading is the present
temperature and humidity.
When the meter is in the MAX/MIN mode, the
°C/°F buttons are disabled. To exit the MAX/MIN
mode, one may press and hold MAX/MIN button
for two seconds.
4.6 Auto Power Off:
By default, when the meter is powered on, it is in
the auto power off mode. The meter will power
itself off after 30 minutes if no key operation is
performed. To disable the auto power off feature,
press and hold the HOLD button and then power
on the meter, The auto power off symbol will
disappear to indicate that auto power off is
disabled.
4.7 Backlight On/Off
The display backlight is switched on by pressing
the button. The backlight is switched off by
pressing the button again.
4.8 Low Battery Condition:
When the battery voltage is under proper
operation requirement, the symbol will show
on the LCD and the battery needs to be replaced
with new batteries.
Humidity Temperature Meter
-5-
4.9 Battery Replacement:
1. Back out the screw at the bottom of the battery
door and lift the door away from the Meter.
2. Remove the fourAA batteries from the
compartment.
3. Replace with four new AA batteries, observing
proper polarity as depicted on the bottom of
the battery compartment.
4. Replace the battery door and tighten the screw
to lock it in place.
Caution:
To extend sensor life, keep the sensor’s
protective shutter closed whenever the
meter is not in use
.
Optional Accessories:
33%RH Humidity standard
75%RH Humidity standard
Fig.1 Battery Compartment
4 “AA” size
alkaline batteries
Battery
cover screw
CENTER TECHNOLOGY CORP.
4 / F NO. 415, Jung-Jeng Rd., 238 Shu-Lin, Taipei, Taiwan
http : / / www.centertek.com GCA000317-02000
Distributor in Australia
Pacific Sensor Technologies Pty Ltd
Unit 4, 3 Neutron Place Rowville, VIC 3178 Australia
1300 662 720 | [email protected]
www.pacificsensortech.com.au
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