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RH520A-en-GB_v4.8   6/19

 

 

9.

 

Press VIEW at any time to return to the Standard View without saving the changes 

SETTING THE RH ALARM LIMITS 

1.

 

Press the SETRH, and ALARM buttons simultaneously from the Standard View 

2.

 

The ALARM, SET, and MAX indicators will switch on. All of the TEMP indicators will switch off 

3.

 

Use the UP-DOWN arrow buttons to increment/decrement the HIGH RH alarm limit. Use the 
LEFT-RIGHT arrow buttons to step through the decades 

4.

 

Press the ALARM button. The MIN (low alarm) indicator will switch on 

5.

 

Use the UP-DOWN arrow buttons to increment/decrement the LOW RH alarm limit. Use the 
LEFT-RIGHT arrow buttons to step through the decades 

6.

 

The HIGH and LOW alarm limits cannot overlap 

7.

 

Use the ALARM button to toggle between the HIGH and the LOW alarm limits 

8.

 

Press the SET button at any time to save changes and return to the Standard View 

9.

 

Press VIEW at any time to return to the Standard View without saving the changes 

Summary of Contents for RH520A

Page 1: ...USER MANUAL Paperless Humidity Temperature Chart Recorder Model RH520A Additional User Manual Translations available at www extech com...

Page 2: ...n Use protective gloves when necessary Do not short circuit batteries or discard them in a fire FCC Compliance This equipment has been tested and found to comply with the limits for a Class B digital...

Page 3: ...odule jack 7 AC adaptor jack 8 DATA RESET button clears recorded measurement data and alarm history 9 Temperature units select switch C or F 10 PROGRAMMING RESET button clears programming changes but...

Page 4: ...ge meter 3 Vertical axis scale limits 4 Cursor Alarm indicators 5 Push button lock out status indicator 6 Time display 7 Relative Humidity RH measurement graph 8 Date display 9 Function indicators 10...

Page 5: ...n with other buttons to set new parameter values Stores new parameter values and returns to the Standard View TEMP Used in combination with other buttons to set the vertical graph range Used in combin...

Page 6: ...xit TEMP RH View Dew Point temp VIEW to exit ALARM Step back through ALARM points ALARM selects next Alarm VIEW to exit SET TEMP ALARM Enters Set TEMP Alarm mode ALARM selects HIGH LOW SET to save SET...

Page 7: ...ator has only one segment left the batteries must be replaced immediately NOTE Always set the Date Time and Sample rate immediately after batteries have been installed or after the RESET button in the...

Page 8: ...RE o C o F The oC oF switch located inside the battery compartment is used to select the unit of measure for temperature displays SETTING THE VERTICAL RESOLUTION FOR THE TEMPERATURE GRAPHIC DISPLAY 1...

Page 9: ...displays will switch off 5 The projected TIME and DAYS representing the moment the internal memory will be full based on the sample rate is displayed in the TIME and DATE display areas 6 Use the UP D...

Page 10: ...H alarm limit Use the LEFT RIGHT arrow buttons to step through the decades 4 Press the ALARM button The MIN low alarm indicator will switch on 5 Use the UP DOWN arrow buttons to increment decrement th...

Page 11: ...Time Date and numerical measurement display fields Each press of the RIGHT ARROW button will move the cursor to the right When the cursor reaches the right side limit the graph will move to the left H...

Page 12: ...the MAX or MIN indicator is ON under the RH reading digits the display is showing the MAX or MIN relative humidity ALARM DISPLAYS 1 Press the ALARM button from the Standard View to analyze the most re...

Page 13: ...time of day 3 The temperature and humidity readings for the selected Time will display 4 Press VIEW to return to the Standard View DEW POINT DISPLAY Press the TEMP and the RH buttons simultaneously t...

Page 14: ...AYS that the internal memory will be full based on the current sample rate is displayed in the TIME and DATE display areas 4 To change the sample rate refer to the programming section of this manual 5...

Page 15: ...r allows the user to track the status of the battery When all 5 segments are dark the battery is fully charged Segments switch off as the battery ages When the battery indicator has only one segment l...

Page 16: ...imum 3 4mA 5 VDC Minimum Output Voltage 2 5 VDC Power supply Three 3 AA batteries and AC adaptor included DC 5V 500mA 3 5mm x 1 35 mm plug Battery life 4 weeks typical using alkaline batteries Operati...

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