Xylem RH 520 User Manual

User Manual

Humidity-Temperature Chart Recorder

Model RH520

Introduction

Congratulations on your purchase of the Extech RH520 Temperature + Humidity Chart Recorder. The RH520 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 audiovisual alarms alert the user when ambient conditions reach alarm presets. The optional alarm module permits automatic relay switching when alarm presets are reached.

The RH520 Internal Memory can store up to 49,152 measurements for later transfer to a PC. Careful use of this instrument will provide years of reliable service.

Warranty

EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment (a six month limited warranty applies to sensors and cables). If it should become necessary to return the instrument for service during or beyond the warranty period, contact the Customer Service Department at (781) 890-7440 ext. 210 for authorization or visit our website www.extech.com for contact information. A Return Authorization (RA) number must be issued before any product is returned to Extech. The sender is responsible for shipping charges, freight, insurance and proper packaging to prevent damage in transit. This warranty does not apply to defects resulting from action of the user such as misuse, improper wiring, operation outside of specification, improper maintenance or repair, or unauthorized modification. Extech specifically disclaims any implied warranties or merchantability or fitness for a specific purpose and will not be liable for any direct, indirect, incidental or consequential damages. Extech's total liability is limited to repair or replacement of the product. The warranty set forth above is inclusive and no other warranty, whether written or oral, is expressed or implied.

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Specifications

Display Large, backlit graphical LCD Temperature measurement range -20.0 to 140.0

F (-28 to 60oC) Humidity measurement range 10 to 95% Dew point temperature -20.0 to 140.0 Accuracy ±3.0% RH and 1.8

F (-28 to 60oC)

F (1oC) for temperature Internal memory storage 49,152 complete reading sets Sampling interval Selectable recording rate: 0.1 to 199.9 minutes Graph scaling User selectable in 10

F, 5oC and 10% increments Low battery indication 5-segment battery indicator Power supply Three (3) ‘AA’ batteries and AC adaptor (included) Battery life 4 weeks typical, using alkaline batteries Operating Temperature CONTROL MODULE and DISPLAY:

0 to 120 SENSOR: -20 to 140

F (0 to 50oC)

F (-28 to 60oC) Operating Humidity CONTROL MODULE and DISPLAY:

90% RH max. SENSOR: 95% RH max. Dimensions 5.0 x 7.7 x 0.9" (127 x 196 x 23mm) Weight 12.6oz (357g)

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RH520 Description

1. Remote sensor

2. Sensor cable

3. LCD Display

4. Swivel keypad / table-top stand

5. PC interface jack

6. Universal alarm

module 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 retains

measurement data and alarm history)

11. Display CONTRAST adjust

12. Sensor cable storage area

13. ‘AA’ 1.5V batteries

14. Sensor cable run

15. Wall mount holes

812 1314

91011

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DISPLAY DESCRIPTION

1. Temperature measurement graph

2. Internal memory usage 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. Numerical temperature reading display

11. Numerical RH reading display

12. Battery status indicator

9 10 9

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