Model 8705 DP-Calc Manual
Contents
1. H O 0 1 0 001 mm Hg VELOCITY Range 250 to 15 500 ft min 1 27 to 78 74 m s Accuracy 1 5 of reading at 2 000 ft min 10 00 m s FLOWRATE Displayed Range to 9 999 000 CFM 9 999 000 l s 9 999 000 m hr K factor Range 0 01 to 999 9 INSTRUMENT TEMPERATURE RANGE Operating range 32 to 158 F 0 to 70 C Storage range 40 to 185 F 40 to 85 C LOGGING CAPABILITY Test ID s Up to 500 test ID s Samples Up to 1000 samples Intervals 1 sec 2 sec 5 sec 10 sec 20 sec 30 sec 60 sec 2 min 5 min 10 min 30 min 60 min TIME CONSTANT Values 1 2 5 10 15 or 20 seconds POWER REQUIREMENTS Batteries Four AA size Alkaline or NiCd rechargeable AC adapter 7 VDC nominal 300 mA Approx battery life 12 hours Alkaline 7 hours NiCd PHYSICAL External dimensions 4 0 in x 6 6 in x 1 5 in 102 mm x 168 mm x 38 mm Weight with batteries 0 76 Ib 0 35 kg Display 4 digit LCD 0 6 in 15 mm digit height PRINTER INTERFACE Type Serial Selectable BAUD rates 1200 2400 4800 9600 19800 1 Pressure velocity measurements are not recommended below 1 000 ft min 5 00 m s and are best suited to velocities over 2 000 ft min 10 00 m s Actual range is a function of pressure temperature and barometric pressure 2 Accuracy is a function of converting pressure to velocity Conversion accuracy improves when actual pressure values increase 3 Actual range is a function of maximum2. 12 To View Statistics dines eased lad 12 To Review Data sisi na Hanke in 12 Downloading Data to a 12 Data Acquisition 13 CONTENTS viaria asien 15 aea tadas 15 A O 15 5 TROUBLESHOOTING 17 APPENDICES A 19 DIP SWITCH SETTINGS 21 obtain application information check out our web site at http www tsi com and click Ventilation Test Instruments and then Applications Notes or contact TSI at U S 800 874 2811 651 490 2811 Fax 651 490 3824 International 1 651 490 2811 Fax 1 651 490 3824 ii Chapter 1 Unpacking and Parts Identification Carefully unpack the instrument and accessories from the shipping container Check the individual parts against the list of components in Table 1 1 Ifany are missing or damaged notify TSI or your local distributor immediately Table 1 1 List of Components Qty ______Item Description ______ Part model 1 Carrying Case 1319114 1 Adapter optional 115V NEMA 5 2613033 230 V European CEE 7 16 2613078 230 V Great Britain 800169 240 V Australian 2613105 Parts Identification Figure 1 1 DP CAL
3. Release the key when 0 is displayed The display will flash CLr Note Only the last sample recorded one sample total can be cleared without clearing the entire memory You cannot go back to a previous test ID and clear a single reading Also you cannot add data to a previous test ID Operation 11 STATISTICS review data Key The STATISTICS key has two purposes One is to view the statistics for the currently displayed parameter and the other is review data for a particular test ID To View Statistics Press STATISTICS to view statistics for the current mode The count will be shown first and then the test ID and then the average Press STATISTICS again before the average disappears from the display to proceed to maximum and again to display minimum To Review Data Press and hold the STATISTICS key The DP CALC will beep twice release the key and the test ID number will be displayed Use the A or V key to select the desired test ID Press ENTER to accept the test ID number Use the A or Y key to select and view average maximum minimum count and individual sample numbers with values for the selected test ID The samples will be displayed in the order that they were taken from the first sample of that test ID to the last To view a different test ID press STATISTICS again to return to test ID on the display Use the A or Y key to choose a new test ID then press ENTER to accept the choice and continue as above to review
4. press the ENTER key to accept the K factor and begin measuring flowrate Note Each time you select or change a K factor the selected or changed K factor will be stored in memory slot 1 The other factors will shift slots The previous 1 factor will become 2 2 will become 3 and so on This may result in losing the 5 slot value when a new K factor value is added Flowrate Calculated Using Pressure and Flow Factor This flowrate is calculated by multiplying the square root of the pressure reading by a manufacturer supplied flow factor This flowrate calculation method is applicable for diffusers that contain pressure taps designed for this purpose and for certain flow stations Note When using this option make sure that the DP CALC pressure units and the flowrate units provided by the diffuser manufacturer correspond Ifthey don t match the calculated flowrate will be incorrect Entering Flow Factor With the DP CALC in flowrate mode press and hold the or Y key until the meter beeps Use the A or Y key to scroll through the circle and rectangle and pressure symbols Press the ENTER key to accept the pressure symbol and move to the selection of the flow factor value The flow factor will be stored in the K factor storage slots However these two factors are not to be confused with each other Use the A or V key to choose the flow factor then press the ENTER key to begin measuring flowrate ACTUAL STANDARD Key Pr
5. sample sample value units STATISTICS key AVG of samples average units 6 Chapter 3 STATISTICS again MAX of samples max value units STATISTICS again MIN of samples min value units NEXT TEST NEW TEST ID CLEAR and released before 0 SAMPLE CLEAR CLEAR and released at 0 CLEAR LOG MEMORY PRESSURE and hold ZERO PRESSURE ACTUAL STANDARD FLOW ACTUAL or FLOW STANDARD When viewing statistics the statistics shown on the display for the current test ID will be printed automatically when the STATISTICS key is pressed When reviewing data nothing will print When taking a sample the reading will be printed automatically each time the SAMPLE key is pressed Any change made to K factor or duct size or shape will print the new shape size or K factor value To print all values stored in memory press and hold the ENTER Print key and the display will begin a countdown from 5 to 0 Release the key when 0 is displayed The instrument will beep twice to confirm that it will print everything in memory Note In order to print the baud rate of the DP CALC must be set to the same as the printer default is 1200 PRESSURE HOLD TO ZERO Key Press the PRESSURE key to display pressure Press and hold for three seconds to zero the pressure reading The unit will double beep to confirm that the pressure has been zeroed Note Make sure that all tubing is disconnected or open to ambient conditions before z
6. to accept choice and return to measuring mode Note To operate the instrument in discrete data logging or single point mode the logging interval must be setto OFF To operate the instrument in continuous data logging mode the logging interval must be set to something other than OFF SAMPLE Key Samples will be stored each time you press the SAMPLE key Parameters will be stored according to the mode you are in as indicated in Table 3 1 Table 3 1 Storage Parameters Stored in Memory Pressure Pressure Velocity Velocity and Pressure Flowrate Flowrate Velocity and Pressure Discrete Data Logging Single Point Measurements Discrete data logging allows you to record single data points The instrument must first be in discrete data logging mode default See SAMPLE INTERVAL Key section above Press the SAMPLE key to take a sample The sample number and COUNT will display briefly While the sample is being taken SAMPLE will flash on the display The sampling will last for the length of the set time constant Then the DP CALC will display the value that was recorded Continuous Data Logging Multiple Readings Over Time Continuous data logging allows you to record samples continuously To get into data logging mode and to select a logging interval see SAMPLE INTERVAL key section above 10 Chapter 3 Pressing the SAMPLE key once begins the sampling process The instrument will display LOG briefly indica
7. velocity pressure duct size K factor temperature and barometric pressure 19 Appendix B DIP Switch Settings To access the DIP switches remove the batteries from the battery compartment On the inside of the battery compartment there is a window with eight DIP switches The table below shows the functions for each switch Caution Make certain that power is turned off before changing DIP switch settings Switch Function OFF ON E metric m h Pa and mm Hg Pressure Pa C Factory Calibration Factory Calibration User Calibration 7 Data Format Commas Decimals MM DD YY DD MM YY leave in OFF position mm Hg To select flowrate to display 1 s or m hr DIP switch 1 must be in the ON position To select pressure to display Pa or mm Hg DIP switch 3 must be in the ON position Figure B 1 DIP Switch Location DIP SWITCH Figure B 1 DIP Switch Location 21 TSI TSI Incorporated 500 Cardigan Road Shoreview MN 55126 U S A Tel 1 651 490 2811 Toll Free 1 800 874 2811 E mail answers tsi com For current information www tsi com P N 1980381 Rev E Copyright 2006 by TSI Incorporated Printed in U S A
8. R INSTALLATION DISMANTLING OR REINSTALLATION COSTS OR CHARGES No Action regardless of form may be brought against Seller more than 12 months after a cause of action has accrued The goods returned under warranty to Seller s factory shall be at Buyer s risk of loss and will be returned if at all at Seller s risk of loss Buyer and all users are deemed to have accepted this LIMITATION OF WARRANTY AND LIABILITY which contains the complete and exclusive limited warranty of Seller This LIMITATION OF WARRANTY AND LIABILITY may not be amended modified or its terms waived except by writing signed by an Officer of Seller Service Policy Knowing that inoperative or defective instruments are as detrimental to TSI as they are to our customers our service policy is designed to give prompt attention to any problems If any malfunction is discovered please contact your nearest sales office or representative or call TSI s Customer Service department at 800 874 2811 USA or 001 651 490 2811 International 1 Chapters 1 UNPACKING AND PARTS IDENTIFICATION 1 Parts Identification 0 0 cipal 1 2 SETTING UP ocio cto ea ee 3 Supplying Power to the 3 Installing the 3 Using the Optional AC 3 Selecting the Display UnitS oooono
9. Ventilation Testing Balancing Model 8705 DP CALc Micromanometer Operation and Service Manual 1980381 Revision E July 2006 1 Model 8705 DP CALC Micromanometer Operation and Service Manual SHIP TO MAIL TO TSI Incorporated 500 Cardigan Road Shoreview MN 55126 3996 USA U S amp INTERNATIONAL Sales and Customer Service 800 874 2811 1 651 490 2811 Fax 1 651 490 3824 Y 1980381 Revision E July 2006 E mail address answers tsi com Website http Awww tsi com EUROPE Sales and Customer Service TSI AB 46 18 52 7000 Fax 46 18 52 7070 TSI GmbH 49 241 52 30 30 Fax 49 241 52 30 349 For current information www tsi com TSI CopyrightO TSI Incorporated 1999 2006 All rights reserved Address TSI Incorporated 500 Cardigan Road Shoreview MN 55126 USA Fax No 651 490 3824 LIMITATION OF WARRANTY AND LIABILITY effective July 2000 Seller warrants the goods sold hereunder under normal use and service as described in the operator s manual shall be free from defects in workmanship and material for twenty four 24 months or the length of time specified in the operator s manual from the date of shipment to the customer This warranty period is inclusive of any statutory warranty This limited warranty is subject to the following exclusions a Hot wire or hot film sensors used with research anemometers and certain other component
10. ated for each test ID The maximum number of test IDs is 500 Time Constant The time constant is an averaging period It is used to dampen the display If you are experiencing fluctuating flows a longer time constant will lessen those fluctuations The display will update every second but the displayed reading will be the average over the last time constant period For example if the time constant is 10 seconds the display will update every second but the displayed reading will be the average from the last 10 seconds This is also referred to as a moving average The time constant is adjusted using the SAMPLE INTERVAL key See the SAMPLE INTERVAL key section later in this chapter for more detail Logging Interval The logging interval is a frequency period that the instrument will log readings For example if the logging interval is set to 30 minutes readings will be taken and recorded once every 30 minutes K Factor The factor is a constant that corrects for flow irregularities and is typically close to 1 00 This K factor is defined by the user by doing a duct traverse to find average velocity Then a K factor can be figured and assigned for a specific location within the duct Flowrate is then figured by multiplying velocity times area times the K factor Flow Factor A constant supplied by the manufacturer of duct work piping or any other obstruction to airflow These manufacturers will specify a specific location for a
11. c 1 Keypad 4 RS 232 Printer Port 2 Display 5 Battery Access Cover 3 Pressure Measurement Ports Chapter 2 Setting Up Supplying Power to the DP CALc The DP CALc can be powered in one of two ways four size AA batteries or the optional AC Adapter Installing the Batteries Insert four AA batteries as indicated by the diagram located on the inside of the battery compartment TSI ships the unit with alkaline batteries The DP CALC is designed to operate with either alkaline or NiCd rechargeable batteries Carbon zinc batteries are not recommended because of the danger of battery acid leakage Typical battery life at 20 C is 12 hours for alkaline batteries Using the Optional AC Adapter The optional AC adapter allows you to power the DP CALC from a wall outlet When using the AC adapter the batteries if installed will be bypassed The AC adapter is not a battery charger Selecting the Display Units The DP CALC is capable of displaying the measured values in several different measurement units as shown in Table 2 1 Table 2 1 Choices of Measurement Units Pressure Velocity FlowRate in H O ae ft min mm En m h Vs If you wish to change the display units on your DP CALC refer to Appendix B for DIP Switch Settings Setting the Real Time Clock The DP CALC has an internal real time clock that keeps track of the time of day the format is HH MM where HH is the hour in 24 hour format and the MM is min
12. can be calculated for a round square or rectangular duct You must first indicate the shape and size ofthe duct or other area through which you want to measure flowrate The DP CALC displays the volumetric flowrate in ft min m h or 1 5 depending on the setting of DIP switches 1 and 2 refer to Appendix B Entering Shape Size And K Factor With the DP CALC in flowrate mode press and hold the A or Y key until the meter beeps Use the or Y key to toggle between circle rectangle and pressure symbols Press the ENTER key to accept a shape and move to selection of the size See the following section for information on selecting the pressure symbol For a circular flow shape the DP CALC will ask for the diameter of the circular area Use the A or V key to select the diameter of the circular area Press the ENTER key to accept the size For a rectangular flow shape the DP CALC will ask for two dimensions Use the A or Y key to select the horizontal dimension then press the ENTER key Use the or Y key to select the vertical dimension then press the ENTER key Now the display will flash K and display a number To select a stored K factor use the A key Scroll through the five existing factors pausing to allow the DP CALC to display the value of each If the K factor needs to be changed select K factor 5 Wait a few seconds for the instrument to display the K factor Use the A and Y 8 Chapter 3 keys to adjust the value and
13. cocnnnnicnnnnicocccnnococnnonancannnn nana 3 Setting the Real Time 3 Changing the Baud 4 Connecting the Optional Portable 4 Connecting to a 4 3 OPERATION ci iia a a tia 5 OVEIVIOW n 5 Keypad Functions s 5 COMMON aora aaa 5 ON OFF Key ducati este 6 KOYS lic cta 6 ENTER PRINT 6 PRESSURE HOLD TO ZERO 7 ea ne 7 FLOWRATE KOV oona aaae 8 Flowrate Calculated Using Velocity Duct Area and K factor 8 Entering Shape Size K 8 Flowrate Calculated Using Pressure and Flow Factor 9 Entering Flow 9 ACTUAL STANDARD nenn 9 SAMPLE INTERVAL nenn 10 SAMPLE KOVi di Bi ale enge 10 Discrete Data Logging Single Point Measurements 10 Continuous Data Logging Multiple Readings Over Time 10 NEXT TEST clear Key 11 STATISTICS review data
14. eroing To measure pressure tubing must first be connected to the pressure ports on the top back of the unit Connect the other ends of the tubing to the measurement device or pressure source with the more positive pressure connected to the port marked and the more negative pressure connected to the port marked When the pressure source is connected the same way the pressure ports are marked the meter will display a positive number VELOCITY Key Press the VELOCITY key to display velocity The velocity will be displayed in ft min or m s depending on the setting of DIP switch 1 refer to Appendix B Operation 7 FLOWRATE Key Press the FLOWRATE key to display volumetric flowrate The DP CALC can calculate flowrate in one oftwo ways Both methods are available for use any time you are in flowrate mode The first method to calculate flowrate is by multiplying velocity times the flow area times aK factor This K factor is defined by the user and is usually close to 1 00 The DP CALC can also calculate flowrate with manufacturer supplied flow factors These flow factors are different from K factors in that they are defined by the manufacturer of the airflow product The specific location where pressure measurements are to be taken is also defined by the manufacturer In this case flowrate equals the flow factor times the square root of the pressure Flowrate Calculated Using Velocity Duct Area and K factor Flowrate
15. ess to toggle between displaying actual and standard velocity or flowrate Press and hold to view enter or change ambient conditions When the key is pressed and held the pressure units will flash and the last barometric pressure entered will be displayed Use the A or Y key to change the barometric pressure and press ENTER to accept it Then the temperature units will flash and the last temperature entered will be displayed Use the A or Y key to change the temperature and press ENTER to accept it and return to measuring mode The ranges that can be entered are as follows Pressure 15 to 40 in Hg 381 to 1016 mm Hg 29 92 in Hg 760 mm Hg is default Temperature 80 to 800 F 62 to 426 C 70 F 21 1 C is default Operation 9 When standard velocity or flowrate is being measured the STANDARD symbol will be shown on the display When actual velocity or flowrate is being measured no symbol will be shown on the display SAMPLE INTERVAL Key The SAMPLE INTERVAL key is used to set the time constant and logging intervals Press to display current time constant Use the or Y key to scroll through the time constant choices which are 1 s 2 s 5 s 10 s 15 s 20 s and LOG symbol then press ENTER to accept the choice If LOG was chosen use the or Y keys to scroll through the logging interval choices which are 2 s 5 s 10 s 15 s 20 s 30 s 1 min 2 min 5 min 10 min 15 min 20 min 30 min 60 min and OFF Press ENTER
16. of the DP CALC characters reset it by turning it off and then on again If necessary refer to the Portable Printer Manual Connecting to a Computer Use the Computer Interface Cable provided with the DP CALC to connect the instrument to a computer for downloading stored data or for remote polling A 9 pin to 25 pin adapter may be required if your computer has a 25 pin serial port For more information on how to download stored data see Chapter 3 for Downloading Data to a Computer section 4 Chapter 2 Chapter 3 Operation Overview The Model 8705 DP CALC measures differential pressure calculates velocity and calculates volumetric flowrate It has data logging capability and can store individual readings and calculate statistics Keypad Functions When pressing the keys on the front panel the DP CALC will beep to confirm the function If you press a key and the DP CALC does not beep then the DP CALC does not allow that function during the selected mode Common Terms In this manual there are several terms that are used in different places The following is a brief explanation of the meanings of terms Sample Consists of all of the measurement parameters stored each time the SAMPLE key is pressed or after each logging interval has passed The maximum number of samples is 1000 Test ID A group of samples A test ID can contain one sample or up to 1000 samples The statistics average minimum maximum and count are calcul
17. pressure measurement and the flow factor corresponding with the location Flowrate is figured by multiplying flow factor by the square root of the pressure Contact TSI for more information about flow factors ON OFF Key Press the ON OFF key to turn the DP CALC on and off When the instrument is first turned on it goes through a preprogrammed power up sequence that includes an internal self check when all displayable items are shown Then the DP CALC displays percentage of battery life percentage of LOG memory available baud rate time HH MM entered barometric pressure entered temperature and then the DP CALC begins taking pressure readings Note To skip start up sequence press and hold ENTER any time after the internal self check Arrow Keys AV The two arrow keys are used to scroll through and select values as needed for DP CALC functions Pressing either arrow key on the start up sequence will allow you to change the baud rate barometric pressure temperature or time ENTER PRINT Key Press the ENTER key to accept a value or condition In start up mode you can also press and hold the ENTER key anytime after the internal self check to skip the start up sequence Press the ENTER Print key momentarily to print information on the optional Portable Printer If the optional Portable Printer is connected the following will be printed while pressing the following keys ENTER key sample value units SAMPLE key
18. rage When storing the DP CALC for more than a month removing the batteries is recommended This prevents damage due to battery leakage 15 Chapter 5 Troubleshooting Table 5 1 lists the symptoms possible causes and recommended solutions for common problems encountered with the DP CALc If your symptom is not listed or if none ofthe solutions solves your problem please contact TSI Table 5 1 Troubleshooting the DP CALC Symptom Possible Causes Corrective Action No display Instrument not Switch on the instrument switched on Low or dead batteries Replace the batteries or plug in the AC adapter Dirty battery contacts Clean the battery contacts Display reads Low battery charge Replace or recharge Lo batteries AC adapter voltage or use batteries contacts Display reads The DP CALC has Return to factory for CAL detected an internal service fault Display says The pressure or Use an alternate OVER velocity is too high measurement method Warning The pressure sensor is protected from damage for up to 7 psi 190 48 kPa or 360 mm Hg At higher pressures it can burst 17 Appendix A Specifications Specifications are subject to change without notice Specifications in parentheses indicate metric equivalents PRESSURE Range 5 to 15 in H20 1245 to 3735 Pa 9 3 to 28 0 mm Hg Accuracy 1 of reading 0 005 1 Pa 0 01 mm Hg Resolution 0 0005
19. s when indicated in specifications are warranted for 90 days from the date of shipment b Parts repaired or replaced as a result of repair services are warranted to be free from defects in workmanship and material under normal use for 90 days from the date of shipment Seller does not provide any warranty on finished goods manufactured by others or on any fuses batteries or other consumable materials Only the original manufacturer s warranty applies Unless specifically authorized in a separate writing by Seller Seller makes no warranty with respect to and shall have no liability in connection with goods which are incorporated into other products or equipment or which are modified by any person other than Seller The foregoing is IN LIEU OF all other warranties and is subject to the LIMITATIONS stated herein NO OTHER EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR PARTICULAR PURPOSE OR MERCHANTABILITY IS MADE TO THE EXTENT PERMITTED BY LAW THE EXCLUSIVE REMEDY OF THE USER OR BUYER AND THE LIMIT OF SELLER S LIABILITY FOR ANY AND ALL LOSSES INJURIES OR DAMAGES CONCERNING THE GOODS INCLUDING CLAIMS BASED ON CONTRACT NEGLIGENCE TORT STRICT LIABILITY OR OTHERWISE SHALL BE THE RETURN OF GOODS TO SELLER AND THE REFUND OF THE PURCHASE PRICE OR AT THE OPTION OF SELLER THE REPAIR OR REPLACEMENT OF THE GOODS IN NO EVENT SHALL SELLER BE LIABLE FOR ANY SPECIAL CONSEQUENTIAL OR INCIDENTAL DAMAGES SELLER SHALL NOT BE RESPONSIBLE FO
20. the data To review data of a different measurement type press the desired measurement typed button while AVG MAX MIN COUNT or sample ID being displayed If there is no data for that measurement type COUNT and will be displayed Press another measurement type key to view more data or press ENTER to return to measuring mode Downloading Data to a Computer LogDat is a Windows based program from TSI designed to download the data stored in the memory of the Model 8705 DP CALC to a computer This data includes the test ID measurement unit of measure correction factors actual standard parameter flow area and time constant This data is date and time stamped In addition the statistics for each test ID are provided The file containing the downloaded data is sorted and tab delimited to allow 1t to be imported into a spreadsheet for further data manipulation To install LogDat software run the SETUP EXE file on the LogDat distribution disc Once you open the program it is self directing and provides all the necessary instructions for downloading data 12 Chapter 3 To download data from the DP CALC connect the supplied computer interface cable to the DP CALC and to a computer serial port Any serial port from COM 1 to COM 4 can be used Caution The data port of DP CALC is not intended for connection to a public telecommunications network Connect the data port only to another RS232 port Data Acq
21. ting samples will be recorded the instrument will display SAMPLE briefly along with the log sample value The instrument continues taking samples until you press the SAMPLE key a second time One sample is taken every logging interval and each sample is an average over the entire logging interval Note Ifyou attempt to set the logging interval at less than the time constant the DP CALC will automatically set the time constant equal to the logging interval The display will then scroll through the test ID number number of samples stored and sample average for that test ID To see maximum minimum or individual data points see STATISTICS review data key section NEXT TEST clear Key Press to advance to the next test ID Ifthe current test ID does not have anything stored it will not advance to the next test ID The DP CALC will automatically increment the test ID number under the following conditions e turning off the DP CALC if there is stored data e taking a sample with a different duct size or shape than the last stored sample e taking a continuous data logging sample e taking discrete samples after taking a continuous data logging sample To clear the last sample press and hold the key and the display will begin a countdown from 5 to 0 Release the key at any time during the countdown before zero is displayed The display will flash SAMPLE CLr To clear all memory keep holding key during the countdown
22. uisition Polling The DP CALC is designed to allow the user to perform polling through the use of a computer To do this the user s computer must be connected and in terminal mode The baud rate for the computer and the DP CALC must be set to the same value For details on viewing or changing the baud rate see Changing the Baud Rate section in Chapter 2 You must then send an upper case V to the instrument The user must write their own routine program to obtain information at specific intervals from the DP CALc The meter will only send information when the SAMPLE or ENTER print keys are pressed or after the computer has sent a V command to the DP CALC Operation 13 Chapter 4 Maintenance The DP CALC requires very little maintenance to keep it performing well Recalibration To maintain a high degree of accuracy in your measurements TSI recommends that you return your instrument for annual recalibration For a nominal fee we will recalibrate the instrument and return it to you with a Certificate of Calibration and US National Institute of Standards and Technology NIST traceability This annual checkup assures you of consistently accurate readings it is especially important in applications where strict calibration records must be maintained Cases If the instrument case or storage case needs cleaning wipe it off with a soft cloth and isopropyl alcohol or a mild detergent Never immerse the DP CALC Sto
23. utes and the date It is very important for the DP CALC to have the time and date correctly set otherwise date and time stamping of recorded data will not be correct To set the time and date press and hold either the Aor Y key during the power up sequence while the time is displayed Release key when the DP CALC beeps twice You will have the opportunity to view and or change the hours minutes year month and day in sequence Use the Aor V key to change any setting Press the ENTER key to store each setting and advance to the next one Changing the Baud Rate The DP CALC has a variable baud rate that is used when downloading or printing data from the instrument By changing the baud rate to a higher rate the data will be downloaded faster Note The baud rate must be equal to that of your computer or printer The instrument baud rate is displayed during the initial power up sequence To change the baud rate press and hold either Aor Y key during the power up sequence while the baud rate is displayed Release the keys when the DP CALC beeps twice Use the Aor Y key to scroll through the available values of 1200 2400 4800 9600 and 19200 Press ENTER to set the value that is displayed Connecting the Optional Portable Printer To connect the printer to the DP CALC locate the Printer Interface Cable supplied with the optional printer and connect the 9 pin end labeled PRINTER to the printer and the other end to the data port
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