User Manual

SD800-EN v2.7 08/13

Introduction

Congratulations on your purchase of the Extech SD800 CO

/Temperature/Humidity Datalogger. This

meter measures, displays, and stores CO

, temperature and relative humidity readings. Data is stored

on a SD card for transfer to a PC. This meter is shipped fully tested and calibrated and, with proper

use, will provide years of reliable service. Please visit the Extech Instruments website

(www.extech.com) to check for the latest version of this User Guide. Extech Instruments is an ISO-

9001 certified company.

Features

 LCD simultaneously displays Carbon Dioxide, Temperature and Relative Humidity

 Datalogger date/time stamps and stores readings on an SD card in Excel® format for easy

transfer to a PC

 Selectable data sampling rate: 5, 10, 30, 60, 120, 300, 600 seconds

Product Description

1. Humidity/Temperature Sensor

2. Humidity Display

3. Temperature Display

4. CO2 Display

5. LOG (ENTER) button

6. SET button

7. AC adaptor socket

8. CO2 probe socket

9. ▲(TIME) button

10. ▼ button

11. Reset button

12. RS-232 output

13. SD memory card socket

14. CO

probe

15. CO

plug

Note: Battery Compartment and Tilt Stand are located on the back of the meter.