1450 First Ave.
Page 6 of 12
Chippewa Falls, WI 54729
(800) 283-1141 or (715) 723-1141
Fax: (715) 723-7890
DTA4000 User Manual
Pacer Instruments, Inc
Rev 1.0
www.pacer-instruments.com
11-Aug-2007
Phone: 1-800-283-1141
MIN
Pressing “MIN” key displays the lowest reading since turn-on for the parameter being measured
in the units being used, independent of any SAVED values. “L 2” (or “L 16”) is displayed,
followed by the value.
NOTE: The “- 2” or “- 16” above refer to the averaging period being used. Press “2/SEC” key to
clear MAX/ MIN mode. See APPENDIX C for description of algorithm that saves MAX/MIN.
SAVE
Pressing “SAVE” during a measurement mode will store a data double consisting of the air
velocity and temperature values being measured at that instant, for a maximum of 999 data
doubles.
DUMP
Pressing the “DUMP” key will transfer the SAVED measurements to a connected printer or PC.
Measurements will be retained for at least 1 year or until memory is cleared by holding the
“DUMP” key when turning unit on.
ANALOG OUTPUT
Analog outputs for temperature and airspeed provide 0-2V FS. See APPENDIX G for
details.
SECTION 3 – OPERATION
NOTE: Unit should be “OFF” before changing batteries or attaching cables.
1)
Remove battery compartment lid and insert battery; replace lid.
2)
Attach the probe cable by carefully aligning the keyway, inserting the connector and turning the
collar to tighten. (See APPENDIX A for unit’s connector wiring diagram).
3)
Press the “ON/OFF” key to turn unit ON. The display will show all elements followed by the
remaining battery capacity (“8.2” means the battery is at 8.2V), followed by “P” and a 3 digits
(i.e. “P025 which means 24 data points are stored). If the “DUMP” key in held when pressing
“ON/OFF” key at turn-on, the data point memory will be cleared.
NOTE: If the battery drops below 6V during use, an “L” shows in the leftmost digit implying a
new (or recharged) battery is required.
4)
To view airspeed, press “FPM” or “MPS” key to display desired units. Place probe in the air
stream with the axis or direction arrow (if present) in the direction of airflow. To calculate
volume flow rate see APPENDIX D.
5)
To view temperature, press “ºF” or “ºC” key and place probe in area to be measured. See
APPENDIX E if “E-xx” (error xx) is displayed.
6)
To SAVE the displayed reading (see SAVE in SECTION 2), press the “SAVE” key.
7)
To correctly measure the air velocity from a large duct, set unit to “16/SEC” mode and move
probe about the area of the opening. After 16 seconds, the unit will display the average velocity
for the preceding 16 seconds, updating after that every 2 seconds by adding the latest 2 second
measurement and dropping the oldest 2 second measurement.
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