Extech SDL200 Operating Manual

User's Guide

4-Channel Thermometer / Datalogger

RTD and Thermocouple Inputs

Model SDL200

Introduction

Congratulations on your purchase of the Extech SDL200 Thermometer, an SD Logger Series meter.
This meter displays and stores temperature readings from up to four (4) Type K, J, T, E, R, or S
thermocouple temperature probes and two (2) Pt100 RTD probes. Logged data readings are stored
on an SD card for transfer to a PC. In addition, an RS232 port allows data streaming to a PC. This
meter is shipped fully tested and calibrated and, with proper use, will provide years of reliable
service.

Meter Description

1. Thermocouple inputs

2. LCD Display

3. Power ON-OFF

4. HOLD and Backlight

5. MAX-MIN key

6. Up arrow ▲ / T1-T2 key (also offset key)

7. SET and Clock

8. Down arrow ▼ (also offset key)

9. ENTER and LOG key

10. PT1 and PT2 RTD input jacks

11. PC interface jack

12. Power Adaptor jack

13. SD card slot

Notes: Items 10 – 12 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

key

key

Display Description

1. Thermometer input jack T1 and PT1 (RTD) identifier

2. Temperature reading for T1 thermocouple or PT1 RTD
input

3. Thermocouple input jack T2 and PT2 (RTD) identifier

4. Temperature reading for T2 thermocouple or PT2 RTD
input

5. Thermocouple input jack T3 identifier

6. Thermometer input type

7. Temperature reading for T3 thermocouple input

8. Temperature reading for T4 thermocouple input

9. Unit of measure

10. Thermocouple input jack T4 identifier

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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
(refer to the battery replacement section later in this guide) or, in the case of the AC adaptor,
check that the adaptor is connected correctly to the meter and to an AC source (refer to the AC
Power Adaptor section later in this guide).

Connecting the RTD and Thermocouple Sensors

This meter offers two modes of operation: RTD temperature probe mode (platinum 100 ohm) and
Thermocouple temperature probe mode (thermocouple Types K, J, T, E, R, or S).

• Connect up to four (4) thermocouples to the sub-miniature jacks at the top of the meter labeled

T1 through T4.

• Connect up to two (2) RTD probes to the 3.5mm ‘phono’ jacks labeled PT1 and PT2 located

under the snap-off compartment cover on the lower right side of the meter .

• Select the desired mode of operation, and other setup features, in the Setup Mode. Refer to the

Setup Mode section below.

IMPORTANT NOTE: The supplied thermocouple probes are useable in the range of -20 to +250°C
(-4 to +482°F) only; even though the meter can display temperature values outside of this range.
For measuring outside of the range specified here, please obtain thermocouples rated accordingly.

for at least 1.5 seconds.

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Setup Mode

Basic settings at a glance

To view the current configuration of the meter with regard to time, date, and datalogging sampling
rate press the SET button momentarily. The meter will now display the configuration in quick
succession. If the information is not gleaned on the first try, simply press the SET button again until
all of the information is noted.

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.

5.

The available Setup parameters are listed below. Additional detailed information is provided
below this list:

dAtE

SP-t

PoFF

bEEP

dEC

Sd F

t-CF

tYPE

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 1.5 for 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.

3.

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).

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

Set the datalogger sampling rate

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

Set the beeper sound ON/OFF

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

Format the SD memory card

Select the temperature unit of measure (C or F)

Select the thermometer type (Pt, K, J, T, E, R, or S)

0, 1, 2, 5,

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