Center 31 Instruction Manual

31
HYGRO THERMOMETER
CENTER TECHNOLOGY CORP.
4F, NO.415, Jung-Jeng Rd., Shu-Lin Dist., New Taipei City 238, Taiwan
E-Mail:center@centertek.com
http://www.centertek.com
Introduction
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.
Specifications
Display: Dual display
Measurement Range: Humidity: 0~100%RH;
Temperature: -20~60
Dew Point Temperature: -20~60°C, -4~140°F
Resolution: 0.1%RH; 0.1°C; 0.1°F
Measurement Rate: 20 sec.
Operating:
Temperature: -20~60°C / Humidity: 0~55°C
Storage Conditions:
-10~70 °C(14~160
Accuracy: (at 23°C)
Probe: RP-31
(15 X 82 mm)
<10%RH, >90%RH ±5.0%RH
±3.0%RH
10%RH~90%RH
±0.8°C / ±1.5°F
15~35°C, 60~95°F
<15°C, >35°C, <60°F, >95°F see Figure 1.
Probe: RP-32
(15 X 94 mm)
±5.0%RH
<10%RH, >90%RH
±2.0%RH
10%RH~90%RH
-20~+60°C, -4~+140°F ±0.8°C / ±1.5°F
0.1 X (specified accuracy)/°C(< 23°C or > 23°C)
Temperature Coefficient:
4 each AAA/R03 batteries
Battery:
Approx. One year (with alkaline battery)
Battery Life:
140 105 × ×26mm (
Dimension / Weight:
Accessories: Battery, instruction manual, (Option: extension cable)
GCA000031-22000
°C, -4~140 °F
°F); 0~70%RH
Figure 1.
Temperature Accuracy (RP-31)
℃
±1.5
±1.0
±0.5
±0.0
℃
-20 -10 0 10 20 30 40 50 60
5.5" 4.1" × ×1.0") / Approx. 265g
Symbol Definition & Button Location
1. Name of Parts & Position:
Sensor
1
SET Key
2
UP Key
3
DOWN Key
4
2. LCD Display:
Battery capacity
indication
Reading indication
Up Limit indication
Buzzer alarm
indication
Lo Limit indication
Maintenance
1. Battery Replacement
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
incorrect. Please replace new batteries immediately.
2. Attention
Do not touch the sensor probe to avoid affecting its sensitivity
3. Cleaning
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.
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.
MAX/MIN Key
5
LCD Display
6
Tilt Stand
7
Battery Cover
8
Maximum/Minimum
indication
Dew Point temperature
indication
Unit indication
Unit indication
Reading indication
, the measurement might be
4 each AAA/R03 batteries
.