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.
Getting Started Power ON-OFF • • • Power the meter by pressing and holding the power button for at least 1.5 seconds. 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.
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. 2. 3. 4. 5. Press and hold the SET button for at least 1.5 seconds to access the Setup menu.
Enabling/Disabling the Auto Power OFF Feature 1. 2. 3. 4. Access the PoFF parameter. Use the arrow buttons to select ON (enable) or OFF (disable). With the Auto Power OFF feature enabled, the meter will automatically switch OFF after 10 minutes of inactivity. Press ENTER to confirm setting. 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).
Measurements and related features Basic Thermocouple Mode Thermocouples are connected at the top of the meter to the jacks labeled T1 through T4. Select the thermocouple type (J, K, etc.) to match the thermocouple type used. In normal thermocouple mode the meter will simultaneously display the temperature for thermocouples T1 through T4. Dashes are displayed if a thermocouple is not connected or if the measurement is out of range.
Measurement OFFSET Thermocouple OFFSET Adjustment 1. 2. 3. 4. 5. 6. 7. Set the desired thermocouple type. Insert a probe to the T1 input jack at the top of the meter. Press and hold both OFFSET buttons (up and down arrow keys) for at least 1.5 seconds to access the OFFSET screen The last measured value is shown on the left side of the LCD; the offset adjusted value is shown on the right. Use the arrow keys to set the desired offset.
Datalogging and PC Interface Types of Data Recording • • • Manual Datalogging: Manually log up to 99 readings onto an SD card via push-button press. Automatic Datalogging: Automatically log data onto an SD memory card where the number of data points is virtually limited only by the card size. Readings are logged at a rate specified by the user. RS-232/USB: The meter includes an RS-232/USB PC interface jack located on the lower right side of the meter under the snap-off compartment cover.
8. If the measurement session exceeds 30,000 readings, a new document will be created (TMD01002.xls) where another 30,000 readings can be stored. This method continues for up to 99 documents, after which another folder is created (TMD02) where another 99 spreadsheet documents can be stored. This process continues in this same fashion with folders TMD03 through TMD10 (last allowable folder). SD Data Card to PC Data Transfer 1. 2. 3. 4.
Battery Replacement and Disposal When the low battery icon appears on the LCD, the batteries must be replaced. Several hours of accurate readings are still possible in this condition; however batteries should be replaced as soon as possible: • Remove the two (2) Phillips screws from the rear of the meter (directly above the top of the tilt stand). • Remove and safely place the battery compartment and screws where they will not be damaged or lost. • Replace the six (6) 1.5V ‘AA’ batteries observing polarity.
Electrical Specifications (ambient temperature 23°C ± 5°C) Pt 100 ohm RTD Input (0.00385 alpha coefficient meeting DIN IEC 751) Resolution Range Accuracy 0.1°C -199.9 to 850.0°C ± (0.4 % + 1°C) 0.1°F -327.0 to 999.9°F ± (0.4 % + 1.8°F) 1°F 1000 to 1562°F ± (0.4 % + 2°F) Thermocouple Input (types K, J, T, E, R, and S) Sensor Type Resolution 0.1°C Type K 1°C 0.1°F 1°F 0.1°C 1°C Type J 0.1°F 1°F 0.1°C Type T 0.1°F 0.1°C Type E 0.1°F 1°F 1°C Type R 1°F 1°C Type S 1°F Range Accuracy -50.
