Center 374, Instruction Manual

DATALOGGER THERMOMETER 

4

6. OPERATION INSTRUCTIONS 

6.1 Power ON/OFF & Backlight Operation: 

6.1.1 Power on/off: 

Press the 

  button to turn on the unit. To turn the unit off, press and hold 

  button down until 

the screen shows “

OFF 3

, 

2

, 

1

,” then the LCD screen goes off. 

Note:  When the unit is on, the LCD will show the following initial information before entering the 
main function: Current date/time 

t

 Available memory 

t

 Entering main function 

6.1.2 LCD backlight on/off: 

Press 

  to turn on the LCD backlight, making it easier to read in dark environment. Press 

again to turn off backlight. The backlight will turn itself off automatically after 30 seconds to save 
battery power. 

6.1.3 Auto power off: 

To save battery life, by default, every time the unit is powered on, it is under auto power off mode. 
The unit will power itself off after 30 minutes if no key operation.   
Auto power off will be automatically disabled under the following 2 circumstances: 

ƒ

  When connecting to PC. 

ƒ

  When data logger function is on process. 

6.1.4 Disabled auto power off: 

(1) Turn off the unit. 

(2) Press and hold 

  button, and keep holding 

 button. 

(3) Press 

  to turn on the unit. 

(4) The LCD shows the initial information and then enters main function. 

(5) Release 

 button. 

(6) Make sure the auto power off 

  symbol disappears from display screen. 

6.2 REC button: 

Press 

 button to start recording data. The 

REC

 symbol will display on the screen. To stop 

recording, press 

 button again. 

6.3 T1-T2 button: 

Toggle showing the T3 or T1-T2. 
(see Fig.1) 
 
 

6.4 MAX/MIN mode (only for channel T1): 

Under this mode, the unit simultaneously monitors and stores the maximum, minimum and average 
value in the memory. The unit will keep updating/refreshing the data. 

To start: 

(1) Press 

 button. 

MAX

 symbol lights up on LCD, the reading shows the maximum data. 

(2) Press 

  button again to show minimum data; the 

MIN

 symbol lights up on LCD. 

(3) Press 

  button again to show average data; the 

AVG

 symbol lights up on LCD. 

Fig.1