DSTCAL Software User Manual 09/16/09 WD1037 Rev E Revised 09/09/14

DSTCAL Software User Manual 09/16/09 WD1037 Rev E Revised 09/09/14 Wahl Instruments, Inc. 234 Old Weaverville Road Asheville, NC 28804 Toll Free 800-421-2853 Phone 828-658-3131 Fax 828-658-0728 www.palmerwahl.com

Table of Contents 1. INTRODUCTION... 3 1.1. DSTCAL... 3 1.2. DSTCAL-Pro... 3 2. DSTCAL KIT INSTALLATION AND SETUP... 4 2.1. Kit Contents... 4 2.2. DSTCAL Software Installation... 4 2.3. Hardware Installation... 4 2.4. Driver Installation... 4 3. SCREEN DEFINITIONS RTD Models... 5 4. CALIBRATION RTD Models... 8 4.1. Theory of Calibration... 8 4.2. Meter Calibration... 8 4.3. Probe Calibration... 10 4.4. Error Windows... 11 5. SCREEN DEFINITIONS - DSX Models:... 12 6. CALIBRATION DSX Current Loop... 14 6.1. Theory of Calibration... 14 6.2. Current Loop Calibration... 14 7. DST600 PROBE ID... 15 7.1. Theory of Operation... 15 7.2. Definitions... 15 7.3. Probe Association... 16 8. SCREEN DEFINITIONS Thermocouple Models... 17 9. CALIBRATION Thermocouple Models... 20 9.1. Theory of Calibration... 20 9.2. Meter Calibration... 20 9.3. Cold Junction Compensation Calibration Window... 22 Page 2 of 24

1. INTRODUCTION This software package is for use with the DST400, DST/DSX500 and DST600 family of Digital Thermometers. There are 2 versions of software, one for customer use and one for use by the factory. The version is indicated on the first line under the Poll for Module button. The 2 versions are: 1.1. DSTCAL Allows the following: Setting of LCD Refresh (display update rate) for all models; R0 Value for all RTD models; Selection of Thermocouple Type for all Thermocouple models; Programming of the 4-mA value, 20-mA value and burnout selection on the DSX models; Association and enabling of probe ID s for DST600 series Models; Setting of Low Battery Check rate; Calibration of the meter s measurement electronics, resistance input for RTD models and mv input for T/C models; Calibration of the meter and probe using an ice bath for RTD versions; Calibration of the Cold Junction Compensation electronics for T/C versions; Calibration of the 4-20 ma output circuit for DSX models NOTE: This software does not calibrate the transmitter section of Models DST620 or DST621, which require the transmitter manufacturer s software and interface module. 1.2. DSTCAL-Pro Only available for the Wahl Factory, same as DSTCAL but also allows setting of the unit s serial number and setting of the Factory default calibration values. Page 3 of 24

2. DSTCAL KIT INSTALLATION AND SETUP 2.1. Kit Contents The DSTCAL Kit is delivered with a CD-ROM that includes the following files: Application files Autorun.inf DSTCAL.application Setup.exe WD1035 DSTCAL Load Instructions WD1037 DSTCAL User Manual The DSTCAL kit also includes: P/N 12436-07 13506 13507 Description Cable, USB2.0A to Mini-B, 5 pin, 6 Ft. DST/USB Interface Module Cable, DST/13506 Interface, 4 pin 2.2. DSTCAL Software Installation 1. Install DSTCAL CD-ROM into the computers CD drive and the AutoPlay window should pop up. 2. Click on Run setup.exe 3. Follow the on-screen prompts. 2.3. Hardware Installation 1. Connect the 12436-07 cable, with the USB2.0A end to your PC s USB port and the Mini-B connector to the USB port on the DST/USB Interface Module. 2. Connect the 4 pin cable assembly, p/n 13507, to the DST/USB Interface Module port labeled DIGI-STEM. 3. With the Digi-Stem unit open, connect the opposite end of the 13507 cable to J3 on the back of the PCB assembly with the RED wire going to Pin 1. Pin 1 is marked on the PCB and is the pin closest to the blue jumper for the C/ F switch. 2.4. Driver Installation Once the software is loaded and the hardware is connected, your computer may report that it needs a driver for the interface box. Usually, the automatic driver search window will find it. If not, you can manually load the driver by: 1. Open your web browser and go to www.ftdichip.com 2. On the left hand menu, click on Drivers, and then click on the sub menu of VCP Drivers. 3. Scroll down to the table labeled Currently supported VCP Drivers: 4. Find your operating system, such as Windows X86 (32-bit) and click on the version in the table, ie. 2.08.28. 5. Follow the auto install wizard. 6. Close the web browser. Page 4 of 24

3. SCREEN DEFINITIONS RTD Models Wahl DST/DSX Series Calibration Software (vx.x.x.xx) window; reference Fig. 1. Note: Rolling the mouse indicator over a title or box will show additional information on the specific subject. File: Activation This command allows entry of the Activation Key to change between versions. User installation installs the DSTCAL version. Key for DSTCAL-Pro is only available for the factory. Check for updates Checks the Wahl Instruments website (www.palmerwahl.com) to see if there are updates available and reports status of your software. Software will prompt you to download new software if it is available. Exit Closes the Calibration Software Settings: Fahrenheit / Celsius - Selects Fahrenheit or Celsius as the temperature scale to be used when programming the 4 ma and 20 ma values (DSX models only). SPY COM - Serial Communication Debug Tool. Not used during normal operation. Help: About Displays software version and contact information for Wahl Instruments. Select OK to close. Poll for Module: This button is used to establish communication between the PC and the Instrument being programmed/calibrated. In some cases, it may need to be clicked multiple times, but usually no more than three. Select COM Port: This button opens the COM port selection window. This is used to select the proper COM port. If the COM port the module is connected to does not show, click Refresh then Scan All COM Ports. Highlight the COM port and click OK. Module Configuration Information Module settings for S/N 99999001: Identifies serial number of instrument. Size: Size of the configuration data in bytes. Model: Identifies instruments model number currently connected to DSTCAL software. Firmware Revision: Identifies firmware revision of instrument. Build Date: Identifies date firmware was compiled. Page 5 of 24

Build Time: Identifies time firmware was compiled. Hardware Revision: Identifies Hardware revision level. This parameter is hard coded into firmware. Serial number: Identifies serial number of PCB, programmable on DSTCAL-Pro only. LCD Refresh: Sets update period for the LCD. 1 period = 250 ms, thus, LCD Refresh: 2 = 500 ms or 0.5 second update rate for LCD. Default value is 8. LCD Refresh is not available for model DST550, which is hard programmed for sample intervals. Low Battery Check: Sets update period for checking of low battery. 1 period = 250 ms, thus Low Battery Check: 1200 = 300,000 ms or 5 minute interval for battery checking. Calibration Information Module Calibration Data RTD Models Active Rref Resistance of nominal 248 ohm reference resistor as calculated by measurements during the Ohm Meter Calibration process. Active Roffset Offset value for reference resistor as calculated by measurements during the Ohm Meter Calibration process. R0 Resistance at 0.0 C. R0 value is used for calculating temperature from the measured resistance. For the highest accuracy of measurements, it should be set to match the R0 value of the probe being used. It may be manually entered or may be automatically calculated and updated by performing Probe (system) Calibration. Box will turn red if value is out of acceptable range of 100 ± 10 ohms. Select Calibration to Perform: The Drop down box allows the user to select one of two calibration routines. To select, simply highlight the desired routine and click the Calibrate button. A calibration routine with step by step instructions will take you through the calibration process. See DSX section for DSX current loop calibration instructions. 1) Ohm Meter Calibration Performs the calibration of the Electronics to ensure it accurately measures resistance. This routine requires the use of known precision resistances. A precision resistor decade box or precision fixed resistors may be used. Some electronic RTD simulators may also work, but we recommend validating their use with the Digistem prior to using them for calibration. R0 will automatically be set to 100.00 ohms for this calibration and upon completion, the user will be given the option to return to the initial R0 or leave it at 100.00 ohms. Page 6 of 24

2) Probe (system) Calibration Performs the calibration of the RTD probe to the meter electronics. This method can be performed when equipment to measure the probes R0 value is not available. This should not be performed if the R0 value is manually entered into the R0 field. Existing Meter Calibration Settings Factory These settings are the default settings and can only be set at the factory. Active These settings are the calibration coefficients used in calculating temperature from the measured probe resistance. These may be changed by the user via the Ohm Meter Calibration routine. Restore Factory Settings This button loads the Active settings registers with the current values displayed under the Factory settings. This is used in the event the Active settings have been corrupted by invalid calibration. NOTE: Restoring the Factory settings will cause the current active settings to be deleted. A new calibration will need to be performed if new Active settings need to be acquired. Showing info box when mouse is over LCD Refresh: title. Fig. 1 Page 7 of 24

4. CALIBRATION RTD Models 4.1. Theory of Calibration With respect to calibration, the RTD thermometer can be viewed as two independent systems with different calibration requirements. The first system is comprised of the meter electronics. The meter calibration is performed so that the meter will measure resistance accurately. This is accomplished by using known, fixed resistances of a specified accuracy. Wahl recommends using resistances with a known accuracy equal to or greater than ±0.009 ohms. The calibration routine also allows entry of the exact resistance. This will allow the technician to enter the calibrated resistor value from a NIST traceable laboratory data sheet or by measuring a nominal valued resistance with a precision ohmmeter, such as an HP3458A, and entering the measured value. See METER CALIBRATION below for details. The second system is the addition of a specific probe to the meter. Due to manufacturing processes, there are variations in the RTD s R0 coefficient. To increase the total system accuracy, the electronics may be programmed with this value so that the microprocessor can accurately calculate the actual temperature from the measured resistance. See PROBE CALIBRATION below for details. 4.2. Meter Calibration Ohm Meter Calibration Window Selecting Resistance Screen 1. Sets R0 to 100 ohms in the event it is set otherwise. 2. Prompts user to Connect 50 ohm Standard Resistance to Meter Input (90 ohm for DST600 series), user may optionally enter exact value of Resistance into the Measured Resistance box. Box will turn red if value is out of acceptable range. 3. Click Next to continue (Clicking Cancel will return to main screen). Waiting for Stabilization Screen 4. Unit waits 10 seconds for stabilization of capacitors Averaging Samples Screen 5. Unit takes 10 readings to average for calibration Selecting Resistance Screen 6. Prompts user to Connect 280 ohm Standard Resistance to Meter Input (194.1 ohm for DST600 series), user may optionally enter exact value of Resistance into the Measured Resistance box. 7. Click Next to continue (Clicking Cancel will return to main screen). Waiting for Stabilization Screen 8. Unit waits 10 seconds for stabilization of capacitors Page 8 of 24

Averaging Samples Screen 9. Unit takes 10 readings to average for calibration Finalizing Calibration Screen 10. Displays results of calibration 11. Click Set Calibration to continue (Clicking Cancel will return to main screen). Set Active Calibration? Window 12. Do you wish to calibrate the module with the values below? Set Active calibration pair to: (xxx.xxxx, x.xxxx) 13. Click Yes to continue. Clicking No will return to Finalizing Calibration Screen. Pro version will send to Set Factory Calibration? window, below. Set Factory Calibration? Window (DSTCAL-Pro only) 14. Do you wish to calibrate the module with the values below? Set Factory calibration pair to: (xxx.xxxx, x.xxxx) 15. Click Yes to continue or No to return to Finalizing Calibration Screen Meter Calibration Success Window 16. One of the following 3 messages will be displayed, depending on previous choices: A meter calibration was performed successfully on this module. Both Active and Factory calibration set to: (xxx.xxxx, -x.xxxxxx) A meter calibration was performed successfully on this module. Only Active calibration set to: (xxx.xxxx, -x.xxxxxx) A meter calibration was performed successfully on this module. Only Factory calibration set to: (xxx.xxxx, -x.xxxxxx) 17. Click OK. Program displays the following message: Page 9 of 24

Press yes to return R0 to its original value or press no to leave R0 set to 100.00 ohms. 4.3. Probe Calibration There are two methods of calibrating the probe to the meter. The first method is done without the aid of the Probe (system) Calibration routine found under the Select Calibration to Perform window. For this method, a precision 4-wire ohmmeter is required. The second method can be used if a precision 4-wire ohmmeter is not available. Probe with Precision 4-wire Ohmmeter Calibration 1. Insert the probe (disconnected from the Digistem) into an ice bath and allow it to stabilize. 2. Measure its resistance with a precision 4-wire ohmmeter. 3. Enter the measured resistance value into the R0 field of the Calibration software. 4. Click the SET button. Probe without Precision 4-wire Ohmmeter Calibration - Probe (system) Calibration Window 1. Click on the Select Calibration to Perform drop down box, and select Probe (system) Calibration 2. Click the Calibrate button 3. Placing probe in Ice Bath window will open. Place probe in Ice Bath and allow to stabilize. 4. Click Next button. (Click Cancel to abort the calibration) 5. Waiting for stabilization window will appear for 10 seconds, followed by Averaging Samples window. When the sample count gets to 10 the Capture R0 button will become active. The software continues to collect samples at approximately once per second and displays a running average of the most recent 10 samples. This allows the user to verify the probe has stabilized in the ice bath. 6. When the probe stability is acceptable, click Capture R0. 7. Capture R0 window will appear asking if you wish to use this value for R0. Click Yes to capture or No to return to the Averaging samples window. The unit will continue to collect samples and display them. You may re-capture R0 or Cancel to exit the program. Page 10 of 24

8. Software will display Probe Calibration Success window. 9. Click OK 10. Software will return to main screen and new value will be loaded into the R0 register and window. 4.4. Error Windows The following error box may occur when in the Meter Only Calibration routine and if the input resistance is not within approximately 4 ohms of the requested nominal setting. One or both of the following error messages may occur when in the Meter Only Calibration and the calculated calibration values don t meet the expected results. The most likely cause of this is that the resistances applied were not equal to the specified resistance or the resistance was changed during the calibration measurements. This may be corrected by entering the actual resistance of the standard used. Page 11 of 24

5. SCREEN DEFINITIONS - DSX Models: Additionally to the previous standard definitions the DSX model software contains the following, reference Fig. 2: Module Configuration Information Module settings for S/N xxxxxxxx: 4 ma Temp. ( C): 0.0: Shows the equivalent current setting for the 4-mA output in F or C. Temperature scale is changed under the Settings menu. The 4-mA value must be a minimum of 10 C (18 F) below the 20-mA setting. 20 ma Temp. ( C): 100.0: Shows the current setting for the 20-mA output in F or C. Temperature scale is changed under the Settings menu. The 20-mA value must be a minimum of 10 C (18 F) above the 4-mA setting. Burnout Setting: 22.0 Upscale (22.0 ma): User selectable setting for fault indication to drive the current to a low or high setting in the event a sensor gets disconnected, or opens. The current values are selected to comply with the NAMUR recommendation NE43 (18.01.1994). The two settings available from the drop down menu are: Upscale (22.0 ma) drives the current to 22.0 ma if fault is detected. Downscale (3.5 ma) drives the current to 3.5 ma if fault is detected. Calibration Information Module Calibration Data 4-20 ma Cal. Slope: 0.000244 - Displays slope correction for D/A converter. 4-20 ma Cal. Offset: -0.00925 Displays offset correction for D/A converter. Select Calibration to Perform: For DSX models, there is a third option on the Select Calibration to Perform drop down box that allows the user to perform calibration of the current loop output. Select the 4-20 ma Calibration and click the Calibrate button. A calibration routine with step by step instructions will take you through the calibration process. 4-20 ma Calibration Performs calibration of the electronics for the 4-20 ma current output. This calibration requires a precision current meter with resolution of 1 microamp or less. Page 12 of 24

Fig. 2 Page 13 of 24

6. CALIBRATION DSX Current Loop 6.1. Theory of Calibration Calibration of the 4-20 ma current loop is performed by selecting the 4-20 ma Calibration on the drop down menu and following the on-screen prompts. This routine performs calibration of the absolute current. It is not intended to make adjustments for temperature to current equivalency. The Module Settings portion of Module Configuration Information should be used for temperature assignments. 6.2. Current Loop Calibration 4-20 ma Calibration Window Enter Measured Current (~4 ma) Screen 1. Forces DSX unit to output 4 ma signal and prompts user to enter actual value measured on precision DC current meter. Box will turn red if value is out of acceptable range. 2. Click Next to continue or Cancel to abort. Enter Measured Current (~20 ma) Screen 3. Forces DSX unit to output 20 ma signal and prompts user to enter actual value measured on precision DC current meter. Box will turn red if value is out of acceptable range. 4. Click Next to continue or Cancel to abort. Verify Output Current Screen 5. Forces unit to output 20 ma. Prompts user to verify the output current using a precision DC current meter. 6. Click Yes if current is within ±.002 ma and calibration will be complete with new coefficients being loaded into registers. 7. Click No if current is not within ±.002 ma and routine will restart to perform calibration again. If the error is greater than.002 ma we suggest running the calibration routine again. Typing a wrong value in one of the windows is a likely cause of error. In the event the unit cannot be calibrated, please contact the factory. Page 14 of 24

7. DST600 PROBE ID 7.1. Theory of Operation Probe ID allows a specific probe to be associated with a specific meter. The meter will only display a temperature when it has the correct probe connected to it. The primary reason for this association is that in case of a failed probe, it helps prevent someone from replacing the probe without going through a calibration process. The unit will display Prb indicating an unauthorized probe is being used. To authorize a new probe, the unit must be connected to the programming or calibration software, where it is recommended the unit be recalibrated to ensure accuracy. The Probe ID may be overridden using the Enable Probe ID field. When the box is checked, the probe ID will function normally. Unchecked will disable the feature. Due to the technology used, on remote cables with connectors the Probe ID has a limit of about 28 meters (92 feet) maximum cable length. Fig. 3 7.2. Definitions (Reference Fig. 3) Additionally to the previous standard definitions, the DST600 software contains the following information for Probe ID: Page 15 of 24

Module Calibration Data Probe ID: 0536B5120000 - Displays serial number of current probe with which the module is associated. Enable Probe ID: Not Enabled Shows current status of Probe ID Enable Probe ID Capture Probe - Used to associate a new probe with the DST600. 7.3. Probe Association Upon connecting a unit to the pc and starting the software the unit is connected via the Poll for Module button. If the probe connected to the unit is not the one associated with the DST600 the following screen will appear: Clicking OK will close this window. To associate the new probe, click the Capture Probe button (Fig. 3). The following screen will appear: To associate the new probe, clicks yes, otherwise click no and the current probe will remain associated. Upon association of the new probe, the DST600 display should change from Prb to the current temperature being measured by the probe within a few seconds. Page 16 of 24

8. SCREEN DEFINITIONS Thermocouple Models Wahl DST/DSX Series Calibration Software (vx.x.x.xx) window Note: Rolling the mouse indicator over a title or box will show additional information on the specific subject. Reference Fig. 4. File: Activation This command allows entry of the Activation Key to change between versions. User installation installs the DSTCAL version. Key for DSTCAL-Pro is only available for the factory. Check for updates Checks the Wahl Instruments website (www.palmerwahl.com) to see if there are updates available and reports status of your software. Software will prompt you to download new software if it is available. Exit Closes the Calibration Software Settings: Fahrenheit / Celsius - Selects Fahrenheit or Celsius as the temperature scale to be used when programming the 4 ma and 20 ma values (DSX models only- currently not available on 400 series). Help: About Displays software version and contact information for Wahl Instruments. Select OK to close. Poll for Module: This button is used to establish communication between the PC and the Instrument being programmed/calibrated. In some cases, it may need to be clicked multiple times, but usually no more than three. Select COM Port: This button opens the COM port selection window. This is used to select the proper COM port. If the COM port the module is connected to does not show, click Refresh then Scan All COM Ports. Highlight the COM port and click OK. Module Configuration Information Module settings for S/N 99999001: Identifies serial number of instrument. Size: Size of the configuration data in bytes. Model: Identifies instruments model number currently connected to DSTCAL software. Page 17 of 24

Firmware Revision: Identifies firmware revision of instrument. Build Date: Identifies date firmware was compiled. Build Time: Identifies time firmware was compiled. Hardware Revision: Identifies Hardware revision level. This parameter is hard coded into firmware. Serial number: Identifies serial number of PCB, programmable on DSTCAL-Pro only. LCD Refresh: Sets update period for the LCD. 1 period = 250 ms, thus, LCD Refresh: 2 = 500 ms or 0.5 second update rate for LCD. Default value is 8. Low Battery Check: Sets update period for checking of low battery. 1 period = 250 ms, thus Low Battery Check: 1200 = 300,000 ms or 5 minute interval for battery checking. Thermocouple Type Allows selection of J, K, E, T or S thermocouples. Changing of the thermocouple type requires the recalibration of the Cold Junction Compensation using the newly selected thermocouple type cable and input source. See section XXXX for instructions. Selection will display the following Caution: Calibration Information Thermocouple Models Module Calibration Data Thermocouple Models mv Cal. Slope Slope correction value for millivolt measurement as calculated by measurements during the Millivolt Calibration process. Displays active values used for the measurement. mv Cal. Offset Offset correction value for millivolt measurement as calculated by measurements during the Millivolt Calibration process. Displays active values used for the measurement. Select Calibration to Perform: Page 18 of 24

Millivolt Calibration: Used to calibrate the mv measurement capabilities of the meter. This is performed by inserting known millivolt signals via copper wires to the DST400 input connector. If this calibration is going to be performed, it must be performed before the Cold Junction Calibration, as Millivolt Calibration will alter the Cold Junction Calibration. Cold Junction Calibration: Used to calibrate the Cold Junction Compensation correction for a given thermocouple type. This is performed by using a Thermocouple Simulator to insert a 25 C equivalent signal, via thermocouple wire of the selected type, to the DST400 input connector. This calibration must be performed after changing thermocouple type. Existing Thermocouple Calibration Settings Factory These settings are the default settings and can only be set at the factory. Restore Factory Settings This button loads the Active settings registers with the current values displayed under the Factory settings. This is used in the event the Active settings have been corrupted by invalid calibration. NOTE: Restoring the Factory settings will cause the current active settings to be deleted. A new calibration will need to be performed if new Active settings need to be acquired. Showing info box when mouse is over LCD Refresh: title. Fig. 4 Page 19 of 24

9. CALIBRATION Thermocouple Models 9.1. Theory of Calibration Meter Calibration is performed to ensure that the meter will measure mv signals accurately. This is accomplished by using known, DC millivolt signals of a specified accuracy. Wahl recommends using mv signal generators with a known accuracy equal to or better than ± 6.0µV and thermocouple emissions of ±0.30 C (includes CJC) at 25 C. The calibration routine also allows entry of the exact millivolt signal. This will allow the technician to enter the calibrated mv value from a NIST traceable laboratory data sheet or by measuring a less accurate mv signal with a precision voltmeter, such as an Agilent 3458A, and entering the measured value. See METER CALIBRATION below for details. Cold Junction Compensation (CJC) Calibration is required to calibrate the cold junction circuit to provide the proper amount of correction for the specific thermocouple type being used. It is essential that this calibration be performed after changing the meter s thermocouple type. While the millivolt calibration is performed with copper wire connected to the meter, the CJC calibration must be performed with the specific thermocouple type wire. The correction factor used by the meter is the mv equivalent of the temperature offset measured in accordance with the selected thermocouple type s mv to temperature table. 9.2. Meter Calibration mv Meter Calibration Window Selecting Millivolt Screen 1. Prompts user to Connect 0 Millivolt Standard to Meter Input, user may optionally enter exact value of millivolt signal into the Measured Millivolts (mv) box. 2. Click Next to continue (Clicking Cancel will return to main screen). Waiting for Stabilization Screen 3. Unit waits 10 seconds for stabilization of capacitors Averaging Samples Screen 4. Unit takes 10 readings to average for calibration Selecting Millivolt Screen 5. Prompts user to Connect 75 Millivolt Standard to Meter Input, user may optionally enter exact value of millivolt signal into the Measured Millivolts (mv) box. 6. Click Next to continue (Clicking Cancel will return to main screen). Note: When performing the Millivolt Calibration, during the calibration of the 75mV, on occasion the calibrated value will show as the maximum mv value of 74.999996 mv. If this occurs, the unit is at its maximum value and may show inaccuracy at higher temperatures. To remedy this potential problem, simply recalibrate the unit and when DSTCAL prompts you to input 75mV, set the mv source to 74.0mV and type 74.0 into the DSTCAL window for the actual value entered. This will likely correct the problem. Page 20 of 24

Waiting for Stabilization Screen 7. Unit waits 1 second for stabilization of capacitors Averaging Samples Screen 8. Unit takes 10 readings to average for calibration Finalizing Calibration Screen 9. Displays results of calibration 10. Click Set Calibration to continue (Clicking Cancel will return to main screen). Set Active Calibration? Window 11. Do you wish to calibrate the module with the values below? Set Active calibration pair to: (xxx.xxxx, x.xxxx) 12. Click Yes to continue. Clicking No will return to Finalizing Calibration Screen. Pro version will send to Set Factory Calibration? window, below. Set Factory Calibration? Window (DSTCAL-Pro only) 13. Do you wish to calibrate the module with the values below? Set Factory calibration pair to: (xxx.xxxx, x.xxxx) 14. Click Yes to continue or No to return to Finalizing Calibration Screen Meter Calibration Success Window 15. One of the following 3 messages will be displayed, depending on previous choices: A meter calibration was performed successfully on this module. Both Active and Factory calibration set to: (xxx.xxxx, -x.xxxxxx) A meter calibration was performed successfully on this module. Only Active calibration set to: (xxx.xxxx, -x.xxxxxx) A meter calibration was performed successfully on this module. Only Factory calibration set to: (xxx.xxxx, -x.xxxxxx) 16. Click OK. Program displays the following message: Page 21 of 24

9.3. Cold Junction Compensation Calibration Window Selecting Standard Thermocouple Input Screen 1. Prompts user to Connect appropriate Thermocouple Standard to Meter Input. This must be with the same type of wire as the DST4xx meter is set to, ie. if meter is set to Type K, you must use Type K wire. Wire can be any limits of error and standard or extension grade. 2. Prompts user to set thermocouple standard s output to 25 C, user may optionally enter exact value of measured temperature signal into the Measured Temperature ( C) box. Waiting for Stabilization Screen 3. Unit waits one second for stabilization of capacitors. Averaging Samples Screen 4. Unit takes 10 readings to average for calibration. Finalizing Calibration Screen 5. Displays results of calibration 6. Click Set Calibration to continue (Clicking Cancel will return to main screen). Set Active Calibration? Window 7. Do you wish to calibrate the module with the values below? Set Active calibration to: (x.xxxxxx mv) 8. Click Yes to continue. Clicking No will return to Finalizing Calibration Screen. Pro version will send to Set Factory Calibration? window, below. Set Factory Calibration? Window (DSTCAL-Pro only) 9. Do you wish to calibrate the module with the values below? Set Factory calibration to: (x.xxxxxx mv) 10. Click Yes to continue or No to return to Finalizing Calibration Screen Meter Calibration Success Window 11. One of the following 3 messages will be displayed, depending on previous choices: A meter calibration was performed successfully on this module. Both Active and Factory calibration set to: (x.xxxxxx mv) A meter calibration was performed successfully on this module. Only Active calibration set to: (x.xxxxxx mv) Page 22 of 24

A meter calibration was performed successfully on this module. Only Factory calibration set to: (x.xxxxxx mv) 12. Click OK. Program displays the following message: Page 23 of 24

234 Old Weaverville Road, Asheville, NC 28804 800-421-2853 828-658-3131 828-658-0728 www.palmerwahl.com info@palmerwahl.com Page 24 of 24