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User's Guide 

 

 
 
SuperHeat Psychrometer 
 
Models RH350 and RH355 (kit)

 

 

 
 
 
 
 
 
 

 

 

 

 

 

 

 

 
 
 
 
 
 
 

Introduction 

Congratulations on your purchase of the Extech RH350 SuperHeat Psychrometer. This 
device measures Differential Temperature (T1-T2, Air-T1, T1-DP), Humidity, Air 
Temperature, Dew Point and Wet Bulb. Advanced features include built-in memory and 
recall of up to 99 data points, Min/MAX/Average readings from the captured data, Data 
Hold, selectable Auto Power Off, and an RS-232 for capturing readings to a PC using 
HyperTerminal (cable sold separately). Careful use of this meter will provide years of 
reliable service. 

 

Summary of Contents for RH355

Page 1: ...perature T1 T2 Air T1 T1 DP Humidity Air Temperature Dew Point and Wet Bulb Advanced features include built in memory and recall of up to 99 data points Min MAX Average readings from the captured data...

Page 2: ...lculated from RH and Air temperature measurements Low Battery Indicator Yes Overrange Indicator E2 air E5 T1 E8 T2 Underrange Indicator E3 air E6 T1 E9 T2 Operating Conditions 4 to 122 o F 20 to 50 o...

Page 3: ...ween Air temperature T1 temperature Air T1 and DP Dew Point 7 Pressing the T2 WB button toggles the lower left display between WB Wet Bulb T1 T2 T2 and T1 DP Dew Point Selecting temperature units of m...

Page 4: ...enter auto power off settings Press the MEM button to select non sleep n or 2 5 10 20 40 and 60 minutes autosleep Press T2 WB to confirm the selection Manual Datalogging Manual datalogging allows the...

Page 5: ...reading may vary depending on operating temperature will flash on the LCD screen After 30 minutes the flashing will stop to indicate that the 33 calibration is complete Note To exit from the calibrati...

Page 6: ...x xC Hxx x Txxx xC Txxx xC Txxxx xC Txxxx xCLRCCRLF or Txxx xF Hxx x Txxx xF Txxx xF Txxxx xF Txxxx xFLRCCRLF Where The 1 st value is Air Temperature the 2 nd value is Humidity the 3 rd value is Dew P...

Page 7: ...ee of defects in parts and workmanship for one year from date of shipment a six month limited warranty applies on sensors and cables If it should become necessary to return the instrument for service...

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