F:\MARKETING\TECHNICAL MANUALS\Air Samplers\DF Battery TECH MANUALS\DF-75 LPM SERIES.doc
Tel: (352) 680-1177 / Fax: (352) 680-1454 / Email: [email protected]
13
OPERATING FEATURES and INSTRUCTIONS (Cont.)
In Time display mode, the colon (:) blinks when the motor is turned on and is continuously illuminated
when the air sampler is in stand-by condition. The blinking colon also indicates that the elapsed time
accumulation is in progress.
SET:
The SET button is located on the left side of the DFM. The SET button is
utilized to set, enable, or disable one or more of the available features
listed below:
Automatic Shut-Off on time
Automatic Shut-Off on volume
Activation of Flow Control
Selection of Data Frequency
Selection of Actual or Standard Flow
Engineering Units
The engineering units for flow and volume are listed on the label above the LED display. The
engineering units, selectable by the user at the time of purchase, are as follows:
Flow
Volume
SCFM
SCF
SLPM
SL
SCMH
SCM
sccm
scc
A user can not switch engineering units in the field. The Digital Flowmeter electronic unit must be
returned to the factory to change the engineering units and to recalibrate the system sensors.
