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Paperless Humidity/Temperature Chart Recorder
Model RH520A
30
100
Extech RH520A Humidity Temperature Chart Recorder
Extech RH520A-NIST Humidity Temperature Chart Recorder
Extech RH520A-220 Humidity Temperature Chart Recorder
Extech RH520A-240 Humidity Temperature Chart Recorder
Extech RH520A-220-NIST Humidity Temperature Chart Recorder
Extech RH520A-240-NIST Humidity Temperature Chart Recorder
actoolsupply.com
actoolsupply.com
10
0
13:45
04-23-04
actoolsupply.com
USER GUIDE
21.2
C
38
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Table of Contents
Related Manuals for Extech Instruments RH520A
Summary of Contents for Extech Instruments RH520A
- Page 1 Paperless Humidity/Temperature Chart Recorder Model RH520A 21.2 13:45 04-23-04 Extech RH520A Humidity Temperature Chart Recorder Extech RH520A-NIST Humidity Temperature Chart Recorder Extech RH520A-220 Humidity Temperature Chart Recorder Extech RH520A-240 Humidity Temperature Chart Recorder Extech RH520A-220-NIST Humidity Temperature Chart Recorder Extech RH520A-240-NIST Humidity Temperature Chart Recorder...
- Page 2 Introduction Congratulations on your purchase of the Extech RH520A Temperature + Humidity Chart Recorder. The RH520A measures and displays Temperature, Humidity, and Dew Point. The remote (detachable) probe senses the ambient conditions while the LCD display graphs and provides numerical representation of the readings. Programmable audio‐visual alarms alert the user when ambient conditions reach alarm presets. The optional alarm module ...
- Page 3 RH520A Description Remote sensor Sensor cable LCD Display Swivel keypad / table‐top stand PC interface jack Universal alarm module jack AC adaptor jack 10 11 13 14 DATA RESET button (clears recorded measurement data and alarm history) Temperature units select switch (C or F) PROGRAMMING RESET button (clears programming changes but retains measurement data and alarm history) Display CONTRAST adjust Sensor cable storage area ‘AA’ 1.5V batteries Sensor cable run Wall mount holes RH520A-EU-EN v4.4 8/13 actoolsupply.com...
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Page 4: Display Description
DISPLAY DESCRIPTION Temperature measurement graph Internal memory usage meter Vertical axis scale limits Cursor / Alarm indicators Push‐button lock‐out status indicator Time display Relative Humidity (RH) measurement graph Date display Function indicators 10. Numerical temperature reading display 11. Numerical RH reading display 12. Battery status indicator RH520A-EU-EN v4.4 8/13 actoolsupply.com... - Page 5 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 RH520A-EU-EN v4.4 8/13 actoolsupply.com...
- Page 6 TEMP + RH View Dew Point temp. VIEW to exit ALARM Step back through ALARM ALARM selects next Alarm, VIEW points to exit SET + TEMP + Enters Set TEMP Alarm mode ALARM selects HIGH/LOW, SET to ALARM 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 TEMP selects upper/lower, SET to mode save SET + RH + UP Enter Set RH Vertical Scale RH selects upper/lower, SET to mode save RH520A-EU-EN v4.4 8/13 actoolsupply.com...
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Page 7: Getting Started
4. In the unlikely event that the AC power AND the battery back‐up fails, the RH520A will require a “Programming Reset” to reset the display. Press the RESET button located inside the battery compartment. “Reset” clears all settings. Time, Date and the logging interval need to be entered. The measurement data and alarm history, however, will still be retained in the non‐volatile memory. 5. The 5‐segment battery life indicator 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 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 battery compartment has been pressed. Then press the Data Reset button on the rear face of the meter for >4 seconds to clear any recorded data. MOUNTING THE RH520A The RH520A can be used in the following ways: 1. Placed on a table top where the swivel keypad is employed as the table stand 2. Wall mounted using the rear mounting holes MEASUREMENT PROBE The probe is attached to the meter with a 1 meter cable and can be used stored in the RH520A probe cradle or remotely. The probe cable length can be easily extended with an RJ45 cable and a gender changer. PUSH‐BUTTON LOCK‐OUT SECURITY FEATURE The RH520A can be secured from tampering by having its push‐buttons locked. 1. Press for approx. 1 second and release the UP, DOWN, LEFT, and SET arrow buttons simultaneously to lock‐out the push‐buttons. Note: The security lock out can only be performed from the main view screen. If a scroll key or the time button was pressed prior to setting up the lock‐out, the user must scroll back to the main screen. 2. Press for approx. 1 second and release the UP, DOWN, LEFT, and SET arrow buttons simultaneously to restore the operation of the push‐buttons RH520A-EU-EN v4.4 8/13 actoolsupply.com... - Page 8 6. Press VIEW at any time to return to the Standard View without storing any changes Important: After powering on the unit and setting the Date, Time, or Sample Rate you MUST clear the internal data memory. If you do not clear the internal data memory you will not get the correct Time and Date stamps (2004) with your recorded data. Press the Data Reset button on the rear face of the meter for >4 seconds. CLEARING THE INTERNAL MEMORY Press the RESET button (located inside the battery compartment) to clear the display and measurement parameters (sample rate, vertical resolution), and to reset the display. Press the DATA RESET button (located on the back of the unit) to clear all of the stored readings, the MAX/MIN values, and the Alarm history. SELECTING THE UNIT OF MEASURE FOR TEMPERATURE ( F) The F 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. Press the SET, TEMP, and UP arrow buttons simultaneously 2. The upper temperature range indicator will flash and the SET icon will appear 3. Use the UP‐DOWN buttons to change the upper temperature value (5° increments). 4. Press the TEMP button and the lower temperature range indicator will flash 5. Use the UP‐DOWN buttons to change the lower temperature value (5° increments) Note that the upper and lower temperature values cannot overlap and the upper value cannot be less than zero 6. Press the TEMP button to toggle upper and lower range values 7. Press the SET button at any time to store a value and return the instrument to the Standard View 8. Press VIEW at any time to return to the Standard View RH520A-EU-EN v4.4 8/13 actoolsupply.com...
- Page 9 4. The MIN and the SET icons will switch on. All other TEMP and RH indicators and numeric 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‐DOWN arrow buttons to increment/decrement the rate. Use the LEFT‐RIGHT arrow buttons to step through the units of time 7. Sample rates can be set from 0.1 minutes (6 seconds) up to 199.9 minutes 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 SETTING THE TEMPERATURE ALARM LIMITS 1. Press the SET, TEMP, and ALARM buttons simultaneously from the Standard View 2. The ALARM, SET, and MAX indicators will switch on. All of the RH indicators will switch off 3. Use the UP‐DOWN arrow buttons to increment/decrement the HIGH temperature 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 temperature 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 RH520A-EU-EN v4.4 8/13 actoolsupply.com...
- Page 10 SETTING THE RH ALARM LIMITS 1. Press the SET, RH, 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 RH520A-EU-EN v4.4 8/13 actoolsupply.com...
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Page 11: Display Modes
CURSOR The CURSOR location is indicated by a small diamond located between the two graphs. See diagram. There is one diamond for each horizontal pixel in the graph (64 positions). The date, time, and measurements for the data point selected by the cursor are shown in the 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. Holding the button down will speed the scrolling rate. When the cursor reaches the oldest (last) reading, it will stop. Each press of the LEFT ARROW button will move the cursor to the left. When the cursor reaches the left side limit, the graph will move to the right. Holding the button down will speed the scrolling rate. When the cursor reaches the newest (latest) reading, it will stop. Each press of the UP ARROW button will shift the graph to the next set of 64 values; to the left of the ones currently displayed (the cursor will not move). Each press of the DOWN ARROW button will shift the graph to the next set of 64 values; to the right of the one displayed (the cursor will not move). Cursor Position Measurements at current cursor position Time and Date of readings at current cursor position RH520A-EU-EN v4.4 8/13 actoolsupply.com... -
Page 12: Alarm Displays
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 recent alarm activity (temperature or humidity), if any. The ALARM display icon and the relevant upper (temperature) or lower (RH) graph pixel will flash. 2. The cursor will move to the location within the graph. If not within the graph currently displayed, the cursor will move to the right‐most position and the graph will shift accordingly so that the relevant data point can be viewed. 3. Press the ALARM button again to view the second most recent set of Alarms (if no alarms, the Standard View will appear) 4. Press the ALARM button again to view the third most recent set of Alarms (if no alarms, the Standard View will appear) 5. This procedure can continue until no further alarms exist and pressing the ALARM button will MAX Temperature Alarm Mode only bring up the Standard View 6. In the example diagram, the RH520A is showing a high temperature alarm (MAX and ALARM indicators on). RH520A-EU-EN v4.4 8/13 actoolsupply.com... -
Page 13: Dew Point Display
USING THE CLOCK TO SORT THROUGH STORED READINGS 1. Press the TIME button in the Standard View mode 2. Use the ARROW buttons to select a particular time of day. 3. The temperature and humidity readings for the selected Time will display. 4. Press VIEW to return to the Standard View. Use the arrow buttons to scroll to the desired time. Readings recorded at the selected time will display DEW POINT DISPLAY Press the TEMP and the RH buttons simultaneously to view the Dew Point reading. The DEW POINT display icon will switch on above the temperature. See the diagram below. Press VIEW to return to the standard view mode. RH520A-EU-EN v4.4 8/13 actoolsupply.com... -
Page 14: Sample Rate Display
12 Hrs 38 minutes 10 months 28 days 3 years months/days/years. Not the actual date. Factory Default Settings Default LCD mode: Standard View Temperature Graph Vertical Resolution: ‐20 to 40 RH Graph Vertical Resolution: 0 to 100% TEMP and RH Alarm Limits: 0 (low) and 100 (high) Sample Rate: One (1) reading stored per minute RH520A-EU-EN v4.4 8/13 actoolsupply.com... -
Page 15: Battery Replacement
If the ALARM display icon is ON steady – there are past Alarms to view in the Alarm history. Use the ALARM button to view the Alarm history as described elsewhere in this manual. If an Alarm is tripped, press the ALARM button to silence it. Press and hold the SET button for 2 seconds to clear an alarm through the external relay module. When in Alarm View or Time View mode: If the ALARM display icon is flashing – the cursor is currently on an Alarm condition. If the ALARM display icon is ON steady – there are past Alarms to view in the Alarm history. Use the cursors or the ALARM button to view the Alarm history as described elsewhere in this manual. Note that the Alarm display icon and the external alarm relay module can be controlled separately as indicated in the statements above. Battery Replacement The 5‐segment battery life indicator 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 left the batteries must be replaced immediately. Open the battery compartment on the rear of the instrument Remove the old batteries and replace with three (3) heavy duty alkaline ‘AA’ batteries observing polarity Replace the battery compartment cover securely The RH520A will require a “Programming Reset” to reset the display. Press the RESET button located inside the battery compartment. “Reset” clears all settings. Time, Date and the logging interval need to be entered. The measurement data and alarm history, however, will still be retained in the non‐volatile memory. You, as the end user, are legally bound (Battery ordinance) to return all used batteries and accumulators; disposal in the household garbage is prohibited! You can hand over your used batteries / accumulators, gratuitously, at the collection points in our branches in your community or wherever batteries / accumulators are sold! Disposal Follow the valid legal stipulations in respect of the disposal of the device at the end of its lifecycle RH520A-EU-EN v4.4 8/13 actoolsupply.com... -
Page 16: Specifications
Low battery indication 5‐segment battery indicator Alarm output 3.5mm Mono Phone Plug, Maximum: 3.4mA @ 5 Vdc, Minimum Output Voltage: 2.5 Vdc Power supply Three (3) ‘AA’ batteries and AC adaptor (included) DC4.5V 300mA, 3.5mm x 1.35 mm plug Battery life 4 weeks typical, using alkaline batteries Operating Temperature CONTROL MODULE and DISPLAY: 0 to 50 C (32 to 120 F) SENSOR: ‐28 to 60 C (‐20 to 140 F) Operating Humidity CONTROL MODULE and DISPLAY: 90% RH max. SENSOR: 95% RH max. Dimensions 127 x 196 x 23mm (5.0 x 7.7 x 0.9") Weight 357g (12.6oz) Alarm Output The alarm output can be used to power external warning or switching devices when programmed alarm limits are exceeded. We offer the optional SL123 (AC) or SL124 (DC) cable and relay kits for this purpose. Transfer logged data using the PC Interface Software installation procedure and operational instructions are located on the ExChart software disc. RH520A-EU-EN v4.4 8/13 actoolsupply.com...
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