Center 31 User manual

31
HYGRO THERMOMETER
CENTER TECHNOLOGY CORP.
4F, NO.415, Jung-Jeng Rd., Shu-Lin Dist., New Taipei City 238, Taiwan
E-Mail:[e-mail]
http://www.centertek.com GCA000031-22000
Symbol Definition & Button Location
n
o
M
i
t
a
c
n
u
r
u
t
a
s
l
n
I
1
2
3
4
5
6
7
8
Sensor
SET Key
UP Key
DOWN Key
MAX/MIN Key
LCD Display
Tilt Stand
Battery Cover
1. Name of Parts & Position:
2. LCD Display:
Battery capacity
indication
Up Limit indication
Lo Limit indication
Buzzer alarm
indication
Maximum/Minimum
indication
Reading indication
Dew Point temperature
indication
Unit indication
Unit indication
Reading indication
MaintenanceIntroduction
Specifications
This is a digital multi-function hygrometer. It measures humidity,
temperature, and dew point. It also includes buzzer alarm function to notify
users when humidity or temperature limits have been exceeded. Large LCD
provides an easy-to-read interface. It can be simply standing on a desk, or
mounted on a wall.
Temperature Accuracy (RP-31)
±0.0 ℃
±0.5
℃
±1.0
±1.5
-20 -10 0 10 20 30 40 50 60
Display:
Measurement Range:
Resolution:
Measurement Rate:
Operating:
Storage Conditions:
Accuracy:
Temperature Coefficient:
Battery:
Dual display
Humidity: 0~100%RH;
Temperature: -20~60 °F°C, -4~140
Dew Point Temperature: -20~60°C, -4~140°F
0.1%RH; 0.1°C; 0.1°F
20 sec.
Temperature: -20~60°C / Humidity: 0~55°C
-10~70 °F); °C(14~160 0~70%RH
(at 23°C)
Battery Life:
Dimension / Weight:
Accessories:
0.1 X (specified accuracy)/°C(< 23°C or > 23°C)
4 each AAA/R03 batteries
140 105 5.5”4.1”× ×26mm ( × ×1.0”) / Approx. 265g
Battery, instruction manual, (Option: extension cable)
Approx. One year (with alkaline battery)
<10%RH, >90%RH
10%RH~90%RH
15~35°C, 60~95°F
<15°C, >35°C, <60°F, >95°F
±5.0%RH
±3.0%RH
±0.8°C / ±1.5°F
see Figure 1.
Figure 1.
<10%RH, >90%RH
10%RH~90%RH
-20~+60°C, -4~+140°F
±5.0%RH
±2.0%RH
±0.8°C / ±1.5°F
The battery indicator shows the status of battery power. As the power
consumes continuously, the number of bars will decrease. Once the
symbol shows only the battery frame , the measurement might be
incorrect. Please replace new batteries immediately.
4 each AAA/R03 batteries
1. Battery Replacement
Do not touch the sensor probe to avoid affecting its sensitivity.
2. Attention
In order to ensure the accuracy of the hygro thermometer for a longer
period of time calibration should be performed once a year.
Clean the device and the window of the display with a clean, lint-free,
antistatic and dry cleaning cloth.
3. Cleaning
Do no use cleaning agents that contain carbon or benzenes, alcohol or anything similar
to clean the product since these substances damage the surface of the measuring
instrument. Moreover, these fumes are hazardous to health and explosive. Do not use
tools with sharp edges, screwdrivers, metal brushes or anything similar to clean the
device.
Probe: RP-31 (15 X 82 mm)
Probe: RP-32 (15 X 94 mm)

Operation Instructions
The LCD will display a self-checking screen for
about 2 seconds right after the batteries are
inserted.
(1) Switch between Relative Humidity (RH)
and Dew Point (DP) Mode:
By default, the LCD displays relative humidity
(RH). Press button to switch between RH and
DP mode. When displaying dew point, the DP
symbol will appear.
(2) Turn On/Off Alarm Function:
To turn on, press . The ALARM symbol
will show up. To turn off, press button again. The
ALARM symbol disappears.
button
(3) MAX/MIN Operation:
Press button to enter MAX/MIN mode. Under this mode the maximum
value and minimum value is kept in the memory simultaneously and
updated with every new data reading.
Press button, MAX indicator and the Maximum value shows
on the display. Press again, MIN indicator will display and the Minimum
value shows on the display. Press again, MAX and MIN indicators will
blink together. This means that these data have been updated in the
memory and the reading is the present temperature and humidity.
To exit the MAX/MIN mode, press and hold for two seconds.
will display
(4) Enter Settings Mode:
Press to enter settings mode. Each time was pressed, it enters next setting as follows:
Set °C/°F set highest RH limit set lowest RH limit set highest Temp limit set lowest Temp limit Quit setup mode
button
4-1. Set °C/°F:
When ℃ (or ℉ ) symbol
blinks, press button to
switch between ℃ and ℉.
Press button to next
setting.
4-3. Set Lo Limit RH:
When RH blinks, press or to adjust
limit value. Press button to next setting.
button
4-2. Set Up Limit RH:
When RH blinks, press or to adjust
limit value. Press button to next setting.
button
4-4. Set Up limit Temperature:
When blinks, press or to
adjust limit value. Press button to next setting.
Temperature button
4-5. Set Lo Limit Temperature:
When Temperature blinks, press or
to adjust limit value. Press button to next
setting.
button
4-6. Press SET to quit setting mode:
Note:
Default Up Limit RH: 80.0 %RH
Lo Limit RH: 30.0 %RH
Up Limit Temperature: 45.0 ℃
Lo Limit Temperature: 10.0 ℃
Buzzer Alarm Function: OFF
The probe can be connected or disconnected from the main unit by the
fastening screw as shown in the graph. Rotate only the fastening screw
rather than the probe body to prevent damage the probe.
Connection between probe and Main unit :
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