User Manual Pressure and Flow Meter Model 20250-13 - Cole
Contents
1. mode off Fig 12 Fig 11 4 Press Avg Rec button to store the new setting re into memory 0 Note meter defaults back to On once meter is aed SLEEP SETUP Fig 12 Measuring Pressure The gauge differential pressure value is shown on the primary display 1 Press P V F button to enter the pressure measuring mode PRESS icon will appear 2 Use A Unit or Unit V button to toggle between five units of measurement psi mbar in H20 mm H20 or Pa 3 Connect a single hose to the Input port leaving the Ref port unconnected Fig 13 inPut n 2a 4 With the tubing open to ambient conditions press and hold the HOLD ZERO button for two seconds to zero out the display 5 Place the input hose in a different zone than the meter 6 The meter displays the differential pressure of the input zone with respect to the reference zone For instance a positive reading means that the input zone is positively pressured with respect to the meter location or its reference zone Note The Hold Save Max Min Avg Zero and Setup modes can be used when measuring pressure air velocity and airflow Set 10 ti Measuring Air Velocity The meter uses standard ambient conditions temperature 70 F 21 1 C barometric pressure 14 7 psi 1013 mbar to approximate actual air velocity and airflow Air velocity value is shown on primary display 1 Press P V F button t2. C 0 to 50 0 1 1 0 Pressure repeatability Pressure linearity hysteresis Maximum pressure Display Response time Automatic power off Operating conditions Storage conditions Weight Dimensions Power supply 0 2 max 0 5 full scale 0 29 full scale 10 psi Backlit LCD 0 5 sec typical Unit shuts off automatically after 20 minutes to preserve battery life 32 to 122 F 0 to 50 C 90 RH noncondensing 14 to 140 F 10 to 60 C 90 RH noncondensing 10 2 oz 290 g 8 x 3 x 2 20 x 7 5 x 5 cm One 9 V battery Mai Recalibrati Repai Cleaning and storage e The meter should be cleaned with a damp cloth and mild detergent when necessary Do not use solvents or abrasives e Store the meter in an area with moderate temperature and humidity refer to the operating and storage conditions in the specifications chart earlier in this manual Battery Replacement When the battery power falls low the low battery icon will appear on the screen Replace the 9 V battery in the rear battery compartment by removing the cover Ensure that the cover is securely refastened when finished It is recommended that Digi Sense products are calibrated annually to ensure proper function and accurate measurements however your quality system or regulatory body may require more frequent calibrations To schedule your recalibration please contact InnoCal an ISO 17025 calibration laboratory accredited by A2LA I
3. indicates that a stored sample or all samples is about to be deleted from memory Number of samples stored in memory or a specific sample location in Recall mode MEM indicates that sample memory is being accessed REC MAX MIN and AVG icons Temperature units of primary display C F Units of air flow CFM CMM Temperature units of secondary display C F Secondary display time elapsed or temperature Changing S Opti Use the Setup mode to choose duct shape and dimensions set duct parameters set which measurement parameters are displayed change sleep mode and clear memory The meter stores the new settings into its memory Option Menu item Settings Duct dimensional units Unit Set duct units in or cm Duct shape and parameters Duct shape Set area of measuring airflow Measurement parameters displayed tYPE 1 2 0r 3 On sleep mode on or Auto power off mode SLEEP Off sleep mode off Clear memory ALL Yes or No for all parameters or for each parameter Entering or Exiting Setup Mode When the meter is in Setup mode the display shows the SETUP icon Press and hold Setup button for two seconds to enter or exit the Setup mode Changing a Setup Option 1 Press A Unit or Unit V button scroll to the Setup option you want to change 2 Press Avg Rec button to indicate that you want to change this setting 3 Press A Unit or Unit V button until the setting you want to use appears on t
4. You must set these parameters before meter will record measurements a Note Manual start method is controlled by user pressing REC button on instrument automatic start method will activate recording via the software instantly once selected 8 In manual record mode press and hold the REC button on the meter for three seconds until the REC icon is displayed on the screen This will indi cate that recording function has been activated Upon completion of desired data logging of measurements press and hold the REC button for three sec onds until the REC icon disappears from the meter display indicating data logging has been deactivated 9 To download the data to the PC select the downward facing arrow in menu bar in the software window The software screen will display the data being downloaded from the meter Upon completion of downloading the data to the PC the data results will be displayed graphically 10 To save the measurement data to your PC select the Data List tab to open the list of measurements recorded Select File icon from the menu bar and save data to desired location on your PC Note Data will be saved in an Excel format that will include all summary information as captured on the Data Summary tab 11 To print recorded data simply select the print icon on the menu bar Software Installation Insert the CD into the PC Double click the set up exe file to launch the software installati
5. NNOCAL INNOVATIVE CALIBRATION SOLUTIONS Phone 1 866 INNOCAL 1 866 466 6225 Fax 1 847 327 2993 E mail sales innocalsolutions com Web InnoCalSolutions com For Product and Ordering Information Contact cA Cole Parmer Delivering Solutions You Trust Toll Free 1 800 323 4340 Phone 1 847 549 7600 Fax 1 847 247 2929 ColeParmer com Digi Sense 1065DGMAN_20250 13 Rev 1 Toll Free 1 800 358 5525 Phone 1 847 327 2000 Fax 1 847 327 2700 Davis com Digi Sense Manual Part No 00100 52
6. The display shows the previously entered duct shape and size If the duct you are now measuring is different than this stored version follow directions on pages 6 8 to change the duct shape and parameters Note The Hold Save Max Min Avg Zero and Setup modes can be used when measuring pressure air velocity and airflow Displaying Temperature Ambient temperature is shown on the secondary display as a reference Use the A Unit button to select your desired temperature unit either C or F Holding the Displayed Readings Press the HOLD ZERO button to freeze the readings on the display The screen will show the HOLD icon Press HOLD ZERO button again to exit this function Viewing the Max Min and Avg Readings 1 Press the MAX MIN button to step through the maximum MAX minimum MIN and average AVG readings The elapsed time since entering the Max Min Avg mode or the time at which the minimum or maximum reading occurred appears on the secondary display 2 Press the P V F button to step through the maximum minimum and average readings for the pressure air velocity and airflow parameters 3 Press and hold the MAX MIN button for three seconds to exit the Max Min Avg mode and return to normal operation Set Operati Saving Measurement Samples The meter can save up to 99 samples in each of the three measuring parameters Once the memory is full for a measuring parameter FU will appear under the MEM icon a
7. User Manual an D DIGI SENSE Pressure and Flow Meter with NIST Traceable Calibration Model 20250 13 ce THE STANDARD IN PRECISION MEASUREMENT Introduction The Digi Sense Pressure and Flow Meter Model 20250 13 measures differential and static pressure and calculates air velocity and airflow This heavy duty meter ensures proper airflow balance and monitors air pressure across key HVAC components promoting good indoor air quality and a comfortable environment Advanced features include data save recall Hold function Max Min Avg readings and automatic power off The instrument is fully tested and calibrated to NIST traceable standards Careful use of this meter will provide years of reliable service npackin Check individual parts against the list of items below If anything is missing or damaged please contact your instrument supplier immediately 1 Meter White and black tubing Pitot tube USB cable Software Carrying case One 9 V battery User manual oO AON DOD oO BW DY NIST traceable calibration report with data Key Features e Large backlit LCD displays pressure air velocity or airflow plus environmental temperature simultaneously e Relative time clock on Max Min Avg provides a time reference for major events e USB interface USB to HART bridge controller e Save and recall of 99 sample readings per parameter e Automatic power off sle
8. ation of flashing digit Use the A Unit or Unit V buttons to change the flashing digit from 0 to 9 Press SAVE CLEAR button to continue to change the next flashing digit Press Avg Rec button to save the new settings into memory The height of duct numbers and H will now appear on the display Fig 6 Press A Unit or Unit V button to move the position of the decimal point Press SAVE CLEAR button to select the station of flashing digit Use the A Unit or Unit V buttons to change the flashing digit from 0 to 9 Press SAVE CLEAR button to continue to change the next flashing digit Press Avg Rec button to save the new settings for W and H into memory shown on the display Press Avg Rec button to save the new settings into memory If duct shape is circular the diameter of duct numbers and D will be Press A Unit or Unit V button to move the position of the decimal point Press SAVE CLEAR button to select the station of flashing digit Use the A Unit or Unit V buttons to change the flashing digit from 0 to 9 Press SAVE CLEAR button to continue to change the next flashing digit Clearing Memory Data 1 While in Setup mode press A Unit or Unit V button to scroll to the Clear Memory setup option Fig 7 2 Press Avg Rec button to access the choices Fig 8 3 Press SAVE CLEAR button to toggle between four selections PRESS VEL FLOW all pressure velo
9. city and flow sample data PRESS only pressure sample data VEL only velocity sample data FLOW only airflow sample data 4 Use A Unit or Unit V buttons to toggle between Yes clear data or No do not clear data Press Avg Rec button to enter new setting Fig 7 Fig 8 Changing S Opti Selecting which Measurement Parameters are Displayed 1 While in Setup mode press A Unit or Unit V L ype button to scroll to the Measurement Type setup option Fig 9 2 Press the Avg Rec button to access the three types Use the A Unit or Unit V button to SETUP toggle between the three choices Fig 9 1 Display pressure and air velocity value 2 Display air velocity and airflow value 3 Display pressure air velocity and airflow value Fig 10 3 Press Avg Rec button to save the new setting into memory Note When in measuring mode you will still need to use the P V F button to toggle between displaying your chosen parameters eur Fig 10 Auto Power Off APO Sleep Mode The meter s default mode is to automatically shut off after 20 minutes of non use To disable the auto power off mode enter the Setup mode 1 While in Setup mode press A Unit or Unit V p button to scroll to the SLEEP setup option screen L Fig 11 2 Press Avg Rec button to display On 3 Use the A Unit or Unit V button to toggle SETUP between On sleep mode on or Off sleep
10. ep mode to conserve battery life Meter Descripti Pitot tube 10 TI 12 13 14 Input port white tubing Reference port black tubing Temperature sensor oOo BR WN Press Power on off button Press MAX MIN button to step through LCD to turn the meter on and off the maximum minimum and average readings To exit the Max Min Avg mode press and hold MAX MIN button for two seconds to resume normal operation Press P V F button to toggle between differential pressure air velocity and airflow measurements For air velocity press P V F button again to show the height and length of a rectangular or the diameter circular duct Press HOLD ZERO button to freeze or unfreeze the displayed readings Press and hold HOLD ZERO button for two seconds to zero out the display Press SAVE CLEAR button to store sample data Or press SAVE CLEAR button to clear sample data in Recall mode Press Setup Backlight button to turn the backlight on and off Press and hold Setup Backlight button for three seconds to enter or exit the Setup mode See Changing Setup Options Press A Unit button to change the temperature units C or F on the secondary display a In the Setup mode use the A Unit button to scroll to the Setup option you want to change or to increase the displayed setting b In the Recall mode use the A Unit button to select the desired samp
11. he display 4 Press Avg Rec button to store the new setting into memory Note Setup mode is disabled in the Max Min Avg mode Setting the Duct Dimensional Units 1 While the meter is in Setup mode press A Unit or Unit V button to scroll to the duct dimension units setup option Fig 1 unt unit SETUP SETUP cm Fig 1 Fig 2 2 Press Avg Rec button to access the units cm will appear on the display Fig 2 3 Press A Unit or Unit V button to toggle between cm and in units 4 Press Avg Rec button to store the new setting into memory Choose a Duct Shape 1 While the meter is in Setup mode mode press A Unit or Unit V button to scroll to the Duct Shape setup option Fig 3 Duct SETUP Duet SETUP Shape Shape Fig 3 Fig 4 2 Press Avg Rec button to access the shapes the H rectangle appears on the display 3 Press A Unit or Unit V button to toggle between H rectangle and circular shapes Fig 4 4 Press Avg Rec button to store the new setting into memory and to enter the Parameters setup option Changina S Onti l Setting Duct Parameters 1 10 11 12 13 14 15 16 17 If duct shape is rectangular the width of duct numbers and W will appear on the display Fig 5 Press A Unit or Unit V button to move the position of the decimal point Press SAVE CLEAR button to select the st
12. le number Press Unit V button to change the units of measure on the primary display a In the Setup mode use the Unit V button to scroll to the Setup option you want to change or to decrease the displayed setting b In the Recall mode use the Unit V button to select the desired sample number Use Avg Rec button for two functions a Press and hold Avg Rec button for two seconds to enter the Recall mode to view the stored sample data While in Recall mode press Avg Rec button to calculate the average of all sample data b In Setup mode press Avg Rec button to enter a Setup option Press Avg Rec button again to store the new setting into memory ON OoahRWHN ee ee ee w Na oO O 14 15 16 17 18 19 20 1 E hour min 20 min sec Se 2 TEMP PRESS VEL FLOW CFM Se 18 l HA P 4 lak MPH aria aes BA F C 5 M PSI mbar inH 0 mmH O Pa 17 6 PC REC MAX MIN AVG 46 7 O E v Hoio MM is Duct SETUP fa Shape b incm clear 13 8 9 10 11 12 Hour min and min sec icons Pressure velocity flow and temperature modes Primary display Units of air velocity knots MPH ft min m s km h Units of pressure psi mbar in H20 mm H20 Pa Indication of meter communicating to PC Auto power off mode icon Duct shape choices Low battery indicator Data HOLD icon Units of H W or D in cm SETUP mode icon Clear icon
13. nd the meter will emit a short beep You will not be able to save any additional samples until some or all saved data samples are deleted for that parameter See Clearing Individual Data Samples from Memory below 1 Press SAVE CLEAR button to save the reading sample into memory The meter will emit a short beep The number of samples saved will be indicated under the MEM icon on lower right of screen Fig 15 Recalling Sample Data from Memory 1 Press the P V F button to recall samples for a specific measuring mode Press and hold the Avg Rec button for two seconds to recall sample data The REC icon will appear on the screen Fig 15 The sample number being displayed is indicated under the MEM icon The last measurement saved will appear first Use the A Unit and Unit V buttons to view different sample readings Press the Avg Rec button again to view the average of all the saved sample data The AVG icon will appear above the MEM icon Press and hold the Avg Rec button for two seconds to exit the Recall mode Clearing Individual Data Samples from Memory de 2 5 PRESS REL be Fig 15 Press the P V F button to recall saved samples for a specific measuring mode Press and hold the Avg Rec button for two seconds to recall sample data The REC icon will appear on the screen Fig 15 The sample number being displayed is indicated under the MEM icon The last mea
14. o enter the air velocity measuring mode VEL icon will appear 2 Use Unit V button to toggle between five units of measurement knots MPH ft min m s or km h 3 Connect the hoses to the pitot tube and to the meter The Input pressure port on the meter connects to the white hose from the total pressure connec tion of the pitot tube The Ref pressure port on the meter connects to the black hose from the static pressure connection of the pitot tube 4 With the tubing open to ambient conditions press and hold the HOLD ZERO button for two seconds to zero out the display l ARE eee Wy Fig 14 Pitot Tube Connection 5 When taking a measurement position the pitot tube tip against the airflow Fig 14 and ensure that the axis of the pitot tube is aligned with the duct within 10 If the measured velocity value measures negative and shows Error on the display check to make sure that the hoses are attached to the correct ports on the meter and the pitot Note The Hold Save Max Min Avg Zero and Setup modes can be used when measuring pressure air velocity and airflow Measuring Airflow The airflow value is shown on the primary display 1 Press P V F button to enter the airflow measuring mode FLOW icon will appear 2 Use Unit V button to toggle between two units of measurement CFM or CMM 3 Press P V F button to access the Duct Shape screen
15. on program 1 2 3 Follow the installation wizard to complete the installation 4 If the USB driver needs to be updated or driver error message is received please go to the folder with driver on the CD and double click the file CP210xVCPiInstaller exe to update the driver 5 Upon successful installation of the software the Mano and Flow software icon shortcut will be automatically placed on your PC desktop 6 For additional information click on Help at the top of the software menu bar for detailed instructions and examples of graphs and files Error Codes An error message will appear on the display if the meter fails an internal diagnostic test And it will freeze all the buttons OL Pressure or air velocity value is over the valid range OL Pressure value is below the valid range Error Air velocity or airflow value is below the valid range Specificati Units Range Resolution Accuracy Pressure psi 0 to 0 7252 0 0001 mbar 0 to 50 0 01 in H20 0 to 20 07 0 01 P mm H20 0 to 509 8 0 1 Pa 0 to 5000 1 Air Velocity m s meters per sec 1 00 to 80 00 0 01 ft min feet per min 200 to 15 733 1 km h kilometers per hr 3 6 to 288 0 0 1 MPH miles per hr 2 24 to 178 66 0 01 Knots nautical MPH 2 0 to 154 6 0 1 Airflow CFM ft3 min 0 to 99 999 0 0001 to 100 _ CMM m3 min 0 to 99 999 0 001 to 100 Temperature oF 32 to 122 0 1 2 0
16. surement saved will appear first Use the A Unit or Unit V buttons to view a specific sample reading Press the SAVE CLEAR button to delete that individual sample from memory Once you are back in measuring mode you will notice that the number of saved samples is reduced Press and hold the Avg Rec button for two seconds to exit the Recall mode Note To clear all sample data for a specific measuring parameter or for all measuring parameters refer to Changing Setup Options Clearing Memory Data on page 9 14 ecoin lonini ion Sof 1 First install software on PC following the setup wizard see Software Installation below Once software is successfully installed the Mano and Flow software icon shortcut will be automatically placed on your PC desktop 2 Connect the meter to your PC via the supplied USB cable 3 Power the meter on 4 Open the installed Multi Data Logger Software by double clicking on the Mano and Flow icon on your PC desktop 5 When opened double click on the meter image of the meter located in the left hand white pane box This will activate the image of the meter s screen to illuminate 6 On the menu bar select the PC image icon when mouse dragged over icon it is titled Data logger Setting 7 In the Data Logger Setting menu confirm time and select date format sampling rate memory full directions auto power off status and start method then select OK
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