DIGI-SENSE DIGI-SENSE 20250-13 Manual
99 Washington Street
Melrose, MA 02176
Phone 781-665-1400
Toll Free 1-800-517-8431
User Manual
Pressure and Flow Meter
with NIST-Traceable Calibration
Model 20250-13
Visit us at www.TestEquipmentDepot.com
MAX
MIN
P/V/F
THE STANDARD IN PRECISION MEASUREMENT
2
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.
Unpacking
Check individual parts against the list of items below. If anything is missing or
damaged, please contact your instrument supplier immediately.
1. Meter
2. White and black tubing
3. Pitot tube
4. USB cable
5. Software
6. Carrying case
7. One 9 V battery
8. User manual
9. NIST-traceable calibration report with data
Key Features
• Large backlit LCD displays pressure, air velocity, or airflow plus environmental
temperature simultaneously
• Relative time clock on Max/Min/Avg provides a time reference for major events
• USB interface; USB to HART bridge controller
• Save and recall of 99 sample readings per parameter
Automatic power
•
-off (sleep) mode to conserve battery life
3
Meter Description
1. Pitot tube
2. Input port (+); white tubing
3. Reference port (–); black tubing
emperature sensor
4. T
5. LCD
Press
6.
Power on/off button
to turn the meter on and off.
Press MAX/MIN button to step through
7.
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.
8. 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
9.
and hold HOLD/ZERO button for two seconds to zero out the display.
10.
Press SAVE/CLEAR button to store sample data. Or press SAVE/CLEAR button to
clear sample data in Recall mode.
Press Setup/
11.
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
12.
/Unit button to change the temperature units (°C or °F) on the
secondary display.
a. In the Setup mode, use the /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 /Unit button to select the desired sample number.
13. Press Unit/ button to change the units of measure on the primary display.
a. In the Setup mode, use the Unit/ 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/ button to select the desired sample
number.
14. 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.
4
3
5
11
7
8
2
14
12
13
10
MAX
MIN
9
P/V/F
6
1
4
Display Functions
1
2
3
4
5
6
7
8 9 10 11 12
20
19
18
17
16
15
14
13
1. Hour:min and min:sec icons
2. Pressure, velocity, flow and temperature modes
3. Primary display
4. Units of air velocity (knots, MPH, ft/min, m/s, km/h)
5. Units of pressure (psi, mbar, in. H
O, mm H2O, Pa)
2
6. Indication of meter communicating to PC
7. Auto power-off mode icon
8. Duct shape choices
9. Low-battery indicator
10. Data HOLD icon
11. Units of H, W, or D (in., cm)
12. SETUP mode icon
13. Clear icon: indicates that a stored sample (or all samples) is about to be deleted
from memory
14. Number of samples stored in memory or a specific sample location in Recall mode
15. MEM: indicates that sample memory is being accessed
16. REC, MAX, MIN and AVG icons
17. Temperature units of primary display (°C, °F)
18. Units of air flow (CFM, CMM)
19. Temperature units of secondary display (°C, °F)
20. Secondary display (time elapsed or temperature)
5
Changing Setup Options
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
Auto power-off mode SLEEP
Clear memory ALL
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 /Unit or Unit/ button scroll to the Setup option you want to change.
2.
Press Avg/Rec button to indicate that you want to change this setting.
Press /Unit or Unit/ button until the setting you want to use appears on
3.
the display.
Press Avg/Rec button to store the new setting into memory.
4.
Note: Setup mode is disabled in the Max/Min/Avg mode.
tYPE 1, 2, or 3
On (sleep mode on) or
Off (sleep mode off)
Yes or No for all parameters or
for each parameter
6
Loading...