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RH520A-en-GB_v4.8   6/19

 

 

KEYPAD QUICK REFERENCE (ALSO SHOWN ON REAR OF THE RH520A HOUSING) 

Key-press 

Function 

Second / Alternate Keystrokes 

VIEW 

Selects view mode 

VIEW modes: Normal, TEMPmax, 
RHmax, TEMPmin, RHmin 

SET 

Saves new settings 

VIEW to cancel, exit mode  

ARROW KEYS 

Scroll through selections 

Movers cursor through stored 
points 

TIME 

View reading at specific 
time/date 

Arrow keys to select, VIEW to 
exit 

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 + RH + ALARM 

Enters Set RH Alarm mode 

ALARM selects HIGH/LOW, SET to 
save 

TIME + VIEW 

View Sample Rate 

VIEW to exit 

SET + TIME + VIEW 

Enter Set Sample Rate mode 

SET to save, VIEW to exit 

SET + TIME 

Enter Set Time/Date mode 

SET to save, VIEW to exit 

SET + TEMP + UP 

Enter Set TEMP Vertical Scale 
mode 

TEMP selects upper/lower, SET to 
save 

SET + RH + UP 

Enter Set RH Vertical Scale 
mode 

RH selects upper/lower, SET to 
save 

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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