Appendix A
129
Models SE and DL

Humidity

10% to 90% RH (non condensing).
User interface

Display

Size - 128 x 64 pixel display that measures 6 cm x 4.8 cm (2.4" x 1.9").
Lighting ~ Transflective to take advantage of ambient lighting plus f iberoptic
backlighting that can be manually operated or set to t urn off after a timed
interval.

Keypad

Construction - Molded layer that holds fourteen press-sensitive buttons.
Buttons - Five buttons have dedicated control functions, another f ive are pri-
marily used for selection and navigation, and another four provide variable
functions when they are defined in the display (softk eys).

Languages

English, Spanish, German, French, Italian and Portuguese.
Input/output
Memory card ~ Removable Secure Digital (SD) d ata storage device that is
inserted in a slot at the base of the instrument. Stor es measurements made
in studies and sessions in session files. If the ins trument has a logging option
installed and is logging measurements, the logged values are stored in the
applicable session file as well. The card also stores configuration files.

Microphones

The following specifications apply to microphones c onnected to the instru-
ment.
QE7052 - Free-field, Class/Type 2, (standard), low cost ½-inch diameter
(.52"), electret (200 volts must be set to “Off” )
BK4936 - Free-field, Class/Type 1, (standard) ½-inch diam eter (.52"), elec-
tret (200 volts must be set to “Off”)
QE4110 - Free-field, Class/Type 1 (optional) ¼-inc h diameter (.276"), con-
denser (200 Volts must be set to “On”). Use for ver y high dB level free-field
measurements. Requires a special preamp to handle high levels. Please
contact 3M.
QE4130 - Free field, Class/Type 1 (optional), ½-inch d iameter (.52"), con-