General Tools and Instruments HT50 v.2 - Manual (Page 3)

HT50 USB 温湿度仪中文说明书 V1.1
HT50 USB Humidity and Temperature Data Logger Manual V1.1
3 7/26/2012
hold for 10 seconds for users to check and note; auto hold will be released after 10 seconds.
%RH: humidity units
℃: temperature unit, Celsius
℉: temperature unit, Fahrenheit
GPP: mix ratio symbol, measuring units is GPP
g/kg: mix ratio symbol, measuring units is g/kg
Function Buttons
MEAS button:
——Press to measure object’s surface temperature using the IRT, and the device will switch to
IRT mode;
——Release to finish the IRT measuring, the last reading will be hold on LCD screen. The logger
will exit from IRT mode if this button is not pressed again in 10 seconds; press again to start
another IRT measurement.
Set button:
Short press this button:
——Turn on the LCD screen when it is off
——While the LCD is on, switch between the four display mode: temperature readings, humidity
readings, mix ratio and working status
Working status has 4 states below:
Log: Indicates the logger is in recording mode
―――: Indicates the logger is in standby mode, in this mode, the device can only display current
ambient temperature and humidity without recording them
FUL: Indicates the logger’s memory is full, recording stopped automatically; current ambient
temperature, humidity and IRT readings can be displayed
CON: logger has not been configured from software, a configuration is needed to set up relative
parameters
Press and hold for 3 seconds to start/stop recording, IRT readings will not be recorded, LCD
switches to working status mode; release the button, LCD switches to previous mode.
Sto button:
Short press this button:
——Turn on the LCD screen when it is off
——While the LCD is on, in temperature display mode, press to switch temperature units