Barometric Pressure / Humidity and
Temperature Datalogger
Model SD700
Introduction
Congratulations on your purchase of the Extech SD700 Humidity/Barometric
Pressure/Temperature Datalogger. This meter measures, displays, and stores the
measured data over time storing the information on a SD card which can then be
downloaded to a PC. This meter is shipped fully tested and calibrated and, with proper
use, will provide years of reliable service
Features
• LCD simultaneously displays Temperature, Pressure and Humidity data
• 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 and AUTO
• Long battery life or AC adaptor
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Product Description
1. Humidity Display
2. Temperature Display
3. Pressure Display
4. LOG (ENTER) button
5. SET button
6. AC adaptor socket
7. Sensors
8. ▲(TIME) button
9. ▼ button
10. Reset button
11. RS-232 output
12. SD memory card socket
Note: Battery Compartment and Tilt Stand are located on the back of the meter.
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Operation
Note: The unit does not have a power switch. Power is always on when batteries are
installed or the AC adaptor is plugged in.
Battery Warning, Installation and Replacement
1. When the
should be replaced. However, in-spec. measurement may still be made for several
hours after the low battery indicator appears before the instrument reads inaccurately.
2. To replace or install batteries, remove the Philips head screw that secures the rear
battery cover and lift off the cover.
3. Replace the six (6) ‘AAA’ batteries (use alkaline heavy duty type), observing polarity
4. Replace and secure the cover.
Datalogging
1. Open the left side door and insert an SD card
Notes:
• The SD card should be at least 1GB in capacity
• Do not use memory cards formatted by other meters or cameras. Use the SD
• The internal clock must be set to the correct time See the advanced features
• The default data structure uses a decimal point “.” as the numeric decimal
• If the SD memory card is not installed, “EMPTY” will appear in the display
• Displayed error messages:
low battery icon appears in the display the batteries are weak and
card formatting procedure under the advanced features section of this manual
to correctly format the card
section of this manual to set the clock
indicator. See the advanced features section to change this to a comma “,”
CHCArd
LobAt
The memory card is full or there is a problem with the card
The battery is low and datalogging is disabled
No
CArd
2. Press the LOGGER button for >2 seconds to begin logging. “DATALOGGER” will
appear in the display and the meter will beep each time the data is recorded (if the
beeper is enabled).
3. To stop datalogging, press the LOGGER button for >2 seconds. “DATALOGGER” will
change to “DATA” and the meter will count down through the recorded data.
Note: To protect data, do not remove the memory card without properly ending the
record function.
Time/Date/Sample Rate Check
Press and Hold the TIME button for >2 seconds and the display will cycle through the date,
time and sample rate information.
The SD card is not inserted
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SD Card Data Structure
1. When the SD card if first inserted into the datalogger the folder HBA01 is created.
2. The first datalogging session will then create a file HBA01001.xls. All data will be
saved to this file until the number of columns reaches 30,000.
3. After 30,000 columns, a new file (HBA01002.xls) is created. This is repeated every
30,000 columns until HBA01099.XLS. At this point a new folder, HBA02 is created
and the process is repeated; HBA10 is the final folder.
Transferring Data to a PC
1. Remove the memory card from the datalogger and plug it into the SD card slot on the
PC.
2. Launch Excel® and open the data file on the memory card from within the
spreadsheet program. The file will appear similar to the one shown below.
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Advanced Settings
The SET function is used to accomplish the following:
• Format the SD memory card
• Set the date and time
• Set the sampling time
• Set the beeper sound ON/OFF
• Set the SD card decimal/comma character
• Select the units of measure for temperature and barometric pressure
• Set the RS232 data output ON/OFF
Note: The datalogger function must be switched OFF before attempting to enter the
Advanced Settings mode.
Press and Hold the SET button for >2 seconds. The first function (Sd F) will appear in the
display. Press the SET button to step through the all of the functions. Use the ▲ and ▼
buttons to adjust the selected function. Use the “LOG” button to step through fields within a
function. In the SET mode, if no button is pressed within 5 seconds the logger will revert to
the standard mode.
1. Sd F: Format the SD card. Press the ▲ button to select yES or no. For yES, press
the Enter button to format the card and erase all existing data
2. dAtE: Set the date and time. Press the ▲ or ▼ buttons to adjust the selected field.
Press the Enter button to store the value and to step through the various fields
3. SP-t: Set the sample rate. Press the ▲ button to select the desired sample rate and
press Enter to store the selection. The selections are: 5, 10, 30, 60, 120, 300, 600
seconds and AUTO. In AUTO, the data will be stored every time there is a value
change of >1% RH OR > 1°C
4. bEEP: Set the beeper ON or OFF. Press the ▲ button to select ON or OFF and press
Enter to store the selection
5. dEC: Set the SD card decimal character. Press the ▲ button to select USA (decimal)
or Euro (comma) and press Enter to store the selection
6. t-CF: Set the Temp. unit to °F or °C
7. rS232: Set the RS232 data output ON/OFF. Press the ▲ button to select ON or OFF
and press Enter to store the selection
8. Baro: Set the unit of measure for barometric pressure. Use the ▲ button to select
inches of mercury (InHg), millimeters of mercury (-Hg), or hectoPascal (hPa)
9. ESC: Exit the setting mode. Press the SET button to return to normal operation
System RESET
If a condition appears where the CPU does not respond to keystrokes or the meter seems
frozen, press the RESET button on the side of the datalogger (use a paper clip or similar
pointed object) to return the meter to a working state.
RS232 Interface
A serial output is provided to link the meter to a PC’s serial port. Call Technical Assistance
for more information on this interface.
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Specifications
Display 60 x 50 mm (2.4 x 2.0”) LCD
Measurements Temperature, Relative Humidity, and Barometric Pressure
Memory Card SD memory card, 1 GB to 16 GB
Datalogger Sampling Time 5/10/30/60/120/300/600 seconds or Automatic
Temperature Compensation Automatic
Display update rate Approx. 1 second
Data Output RS 232 Serial Interface
Operating Temperature 0 to 50°C (32 to 122°F)
Operating Humidity Less than 90% RH
Power Supply Six (6) ‘AAA’ Alkaline or heavy duty 1.5 V batteries or
Battery life Dependent on sample rate, for new alkaline batteries and 60
Weight 282 g (0.62 lbs.)
Dimension 132 x 80 x 32mm (5.2 x 3.1 x 1.3”)
Temperature
Relative Humidity
Barometric Pressure
Note: Above specification tests under the environment RF Field Strength less than 3 V/M &
frequency less than 30 MHz only.
You, as the end user, are legally bound (EU Battery ordinance) to return all
used batteries, disposal in the household garbage is prohibited! You can
hand over your used batteries / accumulators at collection points 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