Extech SDL500 Operating Manual

User's Guide

Hygro-Thermometer / Datalogger

Model SDL500

Introduction

Congratulations on your purchase of the Extech SDL500 Hygro-Thermometer, an SD Logger Series meter. This meter displays and stores Temperature and Relative Humidity readings from the supplied probe and Temperature readings from an optional Type J or K Thermocouple probe. WET BULB and DEW POINT temperature calculations can also be displayed. Logged data readings are stored on an 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.

Meter Description

1. Optional Thermocouple Input jack

2. Supplied Relative Humidity / Temperature Probe input jack

3. LCD Display

4. Power ON-OFF

5. HOLD and Backlight

6. MAX-MIN key

7. Up arrow ▲ key

8. SET and Clock

9. Down arrow ▼ / FUNCTION key

10. ENTER and LOG key

11. PC interface jack

12. Reset Button

13. Power Adaptor jack

14. SD card slot

15. Temperature and Humidity sensors

Notes: Items 11 – 13 are located behind the snap-off compartment cover on meter’s right side.

Battery compartment, tilt stand, and tripod mount are located on the rear of the instrument

key

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Getting Started

Power ON-OFF

• Power the meter by pressing and holding the power button

• Press and hold the power button for at least 1.5 seconds to power OFF the meter.

• This meter is powered by six (6) 1.5VDC ‘AA’ batteries or by optional AC adaptor. If the meter

will not switch ON please check that fresh batteries are installed in the rear battery compartment or, in the case of the AC adaptor, check that the adaptor is connected correctly to the meter and to an AC source.

Connecting the Supplied Relative Humidity/Temperature Probe

The supplied RH/Temperature Probe uses a keyed DIN-style plug to connect to the meter.

• Connect the supplied probe to the top right of the meter in the DIN jack labeled ‘Probe Input’.

• Press and hold the FUNCTION button until the ‘RH’ display icon appears. Release the button

when this ‘RH’ display icon appears. The RH reading in % are now on the upper, larger LCD digits and Temperature in degrees ‘C’ or ‘F’ are now on the lower, smaller LCD digits.

• Use the Setup Mode to further configure the meter.

Connecting an optional Thermocouple Sensor

The SDL500 accepts an optional Type ‘J’ or Type ‘K’ Thermocouple Temperature sensor.

1. Connect a thermocouple to the sub-miniature jack at the top left of the meter labeled ‘Thermocouple Temp. Probe’.

2. Press and hold the FUNCTION button until the ‘TP’ display icon appears. Release the button when this ‘TP’ display icon appears. The thermocouple reading in degrees ‘C’ or ‘F’ is now on the LCD. The thermocouple type (‘J’ or K’) and the unit of measure are also displayed.

3. Use the Setup Mode to further configure the meter.

IMPORTANT SAFETY NOTE: The SDL500 can measure and display temperature up to 1300oC

F), however, thermocouple ratings vary widely; ensure that the thermocouple being used

(2372 is rated accordingly for the temperature being measured.

If an attempt is made to measure temperatures higher than the thermocouple’s rating, damage to the thermocouple and the meter can result. If measurements are made outside the range of a thermocouple personal injury is also possible.

for at least 1.5 seconds.

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Setup Mode

Basic settings at a glance

To view the current configuration of the date and datalogging sampling rate, press the SET button momentarily. The meter will display the configuration in quick succession. Repeat as necessary to observe all the information.

Accessing the Setup mode

1. Press and hold the SET button for at least 1.5 seconds to access the Setup menu.

2. Press the SET button momentarily to step through the available parameters. The parameter type is shown on the bottom of the LCD and the current selection for that type is shown above it.

3. When a parameter is displayed that is to be changed, use the arrow keys to change the setting. Press the ENTER button to confirm a change.

4. Press and hold the SET button for at least 1.5 seconds to exit the Setup mode. Note that the meter automatically switches out of the Setup mode if no key is pressed within 7 seconds.

The available Setup parameters are listed below.

dAtE

Set the clock (Year/Month/Date; Hours/Minutes/Seconds)

SP-t

Set the datalogger sampling rate from 1 to 3600 seconds)

PoFF

Automatic power-off management (Enable or disable the auto-power off function)

bEEP

Set the beeper sound ON/OFF

dEC

Set the numerical format; USA (decimal: 20.00) or European (comma: 20,00)

Sd F

Format the SD memory card

t-CF

Select the temperature unit of measure (oC or oF)

tYPE

Select the thermometer type (‘J’ or ‘K’)

Setting the Clock Time

1. Access the dAtE parameter.

2. Press the ENTER button.

3. Use the arrow buttons to change the YEAR value. Press ENTER to confirm setting.

4. Repeat step 3 above for the MONTH, DAY, HOUR, MINUTE and SECONDS.

5. Press and hold the SET button for at least 1.5 seconds to exit to the normal operation mode (or wait 7 seconds for the meter to automatically switch to the normal operating mode).

6. The clock will keep accurate time even when the meter is switched off. However, if the batteries expire the clock will have to be reset after fresh batteries are installed.

Setting the Datalogger Sampling Time (Rate)

1. Access the SP-t parameter.

2. Use the arrow buttons to select the desired sampling rate. The available settings are: 10, 30, 60, 120, 300, 600, 1800, and 3600 seconds.

Press the ENTER button to confirm the entry.

4. Press and hold the SET button for at least 1.5 seconds to exit to the normal operation mode (or simply wait 7 seconds for the meter to automatically switch to the normal operating mode).

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