RH520 Datasheet, PDF (6/15 Pages) Extech Instruments Corporation. – Humidity-Temperature Chart Recorder

PUSH-BUTTON DESCRIPTION
VIEW
Return the LCD to the Standard View
Escape from any setting function without storing value changes
Scrolls highest and lowest (MAX/MIN) readings when in Standard View
ALARM
Display or Set alarm values
TIME
Display a reading stored at specific Time and Date
Set and Display the recording Sampling Rate
Set the Time and Date
SET
Used in combination 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 combination with other buttons to set temperature alarm values
Used in combination with the RH button to display Dew Point
RH
Used in combination with other buttons to set the vertical graph range
Used in combination with other buttons to set RH alarm values
Used in combination with the TEMP button to display Dew Point
Right, left, down, and up arrow buttons for scrolling data and navigating
the display
KEYPAD QUICK REFERENCE (ALSO SHOWN ON REAR OF THE RH520 HOUSING)
Key-press
VIEW
SET
ARROW KEYS
TIME
TEMP + RH
ALARM
SET + TEMP + ALARM
SET + RH + ALARM
TIME + VIEW
SET + TIME + VIEW
SET + TIME
SET + TEMP + UP
SET + RH + UP
Function
Selects view mode
Saves new settings
Scroll through selections
View reading at specific time/date
View Dew Point temp.
Step back through ALARM points
Enters Set TEMP Alarm mode
Enters Set RH Alarm mode
View Sample Rate
Enter Set Sample Rate mode
Enter Set Time/Date mode
Enter Set TEMP Vertical Scale mode
Enter Set RH Vertical Scale mode
Second / Alternate Keystrokes
VIEW modes: Normal, TEMPmax,
RHmax, TEMPmin, RHmin
VIEW to cancel, exit mode
Movers cursor through stored points
Arrow keys to select, VIEW to exit
VIEW to exit
ALARM selects next Alarm, VIEW to exit
ALARM selects HIGH/LOW, SET to save
ALARM selects HIGH/LOW, SET to save
VIEW to exit
SET to save, VIEW to exit
SET to save, VIEW to exit
TEMP selects upper/lower, SET to save
RH selects upper/lower, SET to save
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RH520 V2.9 3/07