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                                                RHT35-en-GB_V1.0   04/17 

 

Alarm Modes 

Single Event Alarm mode: The LED immediately starts flashing red every 10 seconds 

when the measured value exceeds the alarm threshold. 
Cumulative Alarm mode: The LED begins flashing red only after the 

average value

 

exceeds the alarm threshold and also after any programmed Alarm Delay time. See 

Alarm Delay parameter above. 
Alarm Disable (default): Alarm function disabled. 
Alarm Note: The LED will continue flashing red every 10 seconds (once it is triggered by 

an alarm) even when the measurement later returns to the normal range. To stop the 

LED alarm, plug the logger into the PC USB port to generate a report, or power off the 

logger (short press of the power button while it is not connected to the PC). 

 

Alarm Limits 

Select the alarm threshold ranges for air temperature, %RH, or pressure. For example, 

if the temperature range is set to 2.0~8.0

 o

C, when the measurement falls below 2

o

C or 

exceeds 8

 o

C the LED will flash red every 10 seconds.  

Note

: If an alarm occurs between two logging points, the logged data will not show the 

alarm but the LED may still flash red every 10 seconds, especially in Single Event alarm 

mode. If desired, use the Cumulative Alarm mode to minimize this effect. 

 

Password 

A 16 alphanumeric character (max.) password may be used to prevent unauthorized 

re-programming. 

 

User Company Name 

Input a company name to be included on the log report (20 characters max.).  

 

A Note On Time Zones 

The logger automatically synchronizes the time zone with the connected PC when 

‘SAVE’ is selected. Note: Time zone changes occurring during logging are not taken into 

account. 
 

Once all the programming is complete, press ‘SAVE’ to confirm the settings. Close the setup 

window, remove the logger from the PC USB port, and start datalogging as described in the 

next section. 

Summary of Contents for RHT35

Page 1: ...USER MANUAL USB Multi Function Datalogger Model RHT35 Additional User Manual Translations available at www extech com ...

Page 2: ...start high low alarms bookmarking and password protection Automatically generate PDF and Microsoft Excel datalog reports High accuracy thermistor temperature sensor capacitive humidity sensor MEMS pressure sensor Compact light weight design Large LCD for easy viewing Dual color red and green LED status indicator for datalogger progress PC connection status and high low alarms Large memory capacity...

Page 3: ...talogger will not start unless it has been configured using the PDF Logger Configuration Tool exe program as described later in this user manual Maximum Minimum Reading button At any time short press to step through the highest MX and lowest MIN readings recorded in the current datalogging session Bookmark button Manually place a time stamped bookmark in the datalog report by pressing and holding ...

Page 4: ...ry icon flashes once per second when battery level is critically low MX Displayed when the maximum recorded reading is selected with the MAX MIN button MN Displayed when the minimum recorded reading is selected with the MAX MIN button inHg Displayed when showing pressure in imperial units hpa Displayed when showing pressure in metric units LED Status Indicator Description The dual color red green ...

Page 5: ...GE SELECTION 5 SAMPLING RATE Datalogger recording interval 6 START DELAY Delay period from when START is pressed and datalogging begins 7 UNIT Imperial or Metric unit selection 8 PASSWORD Select a 16 character password for tamper protection 9 COMPANY NAME 20 Character user label for inclusion in logging report 10 SAVE Press SAVE to confirm the configuration 11 CANCEL Abort the configuration 12 MAN...

Page 6: ...ult language is English select German French Italian Spanish or Portuguese as desired The generated logging report format will match the language selected 7 To review the User Manual click Manual to open the User Manual PDF file 8 The parameters needed to configure the datalogger for logging are defined below Refer to the earlier screen shot of the PDF Logger Configuration Tool window for referenc...

Page 7: ...perature RH or pressure For example if the temperature range is set to 2 0 8 0 oC when the measurement falls below 2oC or exceeds 8o C the LED will flash red every 10 seconds Note If an alarm occurs between two logging points the logged data will not show the alarm but the LED may still flash red every 10 seconds especially in Single Event alarm mode If desired use the Cumulative Alarm mode to min...

Page 8: ...ng To place a bookmark manually during datalogging press and hold the MARK button until the measured reading flashes 3 times Up to eight 8 bookmarks can be placed the bookmarks will appear in the logging report MAX MIN Readings Short press the MAX MIN button to step through the highest MX and lowest MN readings stored in memory Checking Battery Status At any time short press the MARK button to vie...

Page 9: ...a 0 60o C 5hPa 20 0o C all other ranges unspecified Logger Type Re usable Datalogger Capacity 16 000 humidity 16 000 temp 16 000 barometric pressure Sampling Intervals 30 seconds and 5 10 30 60 90 120 minutes Start Delay Time 0 5 30 45 60 90 120 minutes and 24 hours Alarm Ranges Temp 30 70o C 22 158o F Humidity 1 to 99 RH Alarm Delay inhibit 0 5 30 45 60 90 120 minutes Alarm Types Single Event Cum...

Page 10: ...ose of this instrument in household waste The user is obligated to take end of life devices to a designated collection point for the disposal of electrical and electronic equipment Battery Status Check To check the approximate number of days of battery life remaining short press the MARK button The display will show the number of days and the d for days XXd Cleaning Wipe the datalogger with a damp...

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