User's Guide Humidity + Temperature + Pressure Datalogger Model RHT50
Introduction Congratulations on your purchase of the Relative Humidity / Temperature / Pressure Datalogger. This datalogger measures and stores up to 10,000 readings. The user can easily configure the logging rate, high/low alarm and start-mode, and download the stored data by plugging the module into a PC's USB port and running the supplied PC software. Data can then be graphed, printed and exported to other applications.
Operation INSTALLING THE GRAPHING SOFTWARE TM Install the supplied Windows PC Datalogger Software by placing the supplied program disk in the PC’s CD-ROM drive. If the installation program does not automatically open and provide on-screen prompts, open and browse the CD-ROM drive, then find and double-click on the SETUP.EXE file included on the program disk. Follow the on-screen prompts to complete the installation.
LED STATUS GUIDE LEDs Record Alarm Green Meaning No LED Logging not started No LED Logging stopped * No LED Battery discharged ** Green flash (single): Logging indication ***** Green flashes (five) Reset Green flashes (six) Start Logging Red double flash every 30 sec.
Specifications Range Relative Humidity Temperature Accuracy 0 to 20 and 80 to 100% ±5.0% 20 to 80% ±3.5% o o o -40 to 32 F and 104 F to 158 F o o -40 to 0 C and +40 to +70 C o o o o 32 F to104 F/0 C to +40 C Pressure o o o o ±3.6 F/±2 C ±1.8 F/±1 C o 950 to 1050hPa Accuracy: ±0.25%FSO @ (25 C) Repeatability: ±0.25%Max+±0.3%FSO) Linearity/Hysteresis: ±0.24%FSO Temperature coefficient: ±0.1%FSO Notes: FSO: Full Scale Output 1psi = 68.947 mbar = 0.068947 bar 1 psi = 6894.7 Pa = 68.
Battery Replacement It is highly recommended that the battery be replaced every 12 months, or prior to logging critical data. The RHT50 does not lose its stored readings when the battery weakens or when the battery is replaced; the data logging process will however be stopped and cannot be re-started until the battery has been replaced and the logged data has been downloaded to PC. Use only 3.6V lithium batteries. Before replacing the battery, remove the datalogger from the PC.
