1450 First Ave.
Page 6 of 10
Chippewa Falls, WI 54729
(800) 283-1141 or (715) 723-1141
Fax: (715) 723-7890
DA40T User Manual
Pacer Instruments, Inc
Rev 1.0
www.pacer-instruments.com
11-Aug-2007
Phone: 1-800-283-1141
HOLD/RESET
Pressing “HOLD/RESET” key will freeze the reading on the display; “HOLD” is displayed
and the reading is held. Pressing “HOLD/RESET” key a second time frees the display.
SECTION 3 – OPERATION
NOTE: Unit should be “OFF” before changing batteries or attaching probe.
1)
Remove battery compartment lid and insert batteries; replace lid (see APPENDIX D).
2)
Attach the probe cable by aligning the keyway(s), inserting connector(s) and turning collar(s) to
tighten (see APPENDIX A for wiring diagram).
3)
Press the “ON/OFF” key to turn unit ON. The display will show all its elements (see
APPENDIX C) followed by the remaining battery capacity (“bA85” means the battery is at 85%
capacity) followed by “2.75” or “1.00” indicating that the APT275 or APT100 probe,
respectively, is attached.
Replace batteries if symbol shows during usage.
4)
Press “FPM/MPS” key, if needed, to display desired units. Place probe in the air stream with the
axis or direction arrow (if present) in the direction of the airflow. To calculate CFM see
APPENDIX E.
5)
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 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.
6)
Press “ºF/ºC” key to display temperature in ºF; press again to display in ºC. Place probe in area to
be measured. See APPENDIX F if “E-xx” is displayed.
7)
To get maximum readings since turn-on, press “MAX/MIN” key; to get minimum readings,
press “MAX/MIN” key a second time. For explanation of the displayed views, see
“
MAX/MIN
”
paragraph in SECTION 2, also see APPENDIX B.
8)
To HOLD the displayed reading, press the “HOLD/RESET” key. Press key again to clear the
HOLD condition.
