User manual

Appendix A: Performance Specification
WFM 90 & WFM 91 User Manual
A–9
A-8.
Environmental characteristics 
CATEGORY
DESCRIPTION
Operating Altitude REQ: To 15,000 feet (4572 meters).
REF: IEC 1010-1 compliance to 2000 me-
ters.
Operating Temperature REQ: 0° to +50° C.
REF: IEC 1010-1 compliance to +40° C.
Equipment Type REQ: Measurement.
Installation Category REQ: Installation Category I (as defined in
IEC 1010-1, Annex J).
REF: Rated for indoor use only.
Pollution Degree REQ: Pollution Degree 2 (as defined in
IEC 1010-1).
Vibration – Operating REF: 15 minutes each axis at 0.015 inch,
frequency varied from 10–55–10 Hz
in 1-minute cycles with instrument
secured to vibration platform. Ten
minutes each axis at any resonant
point or at 55 Hz if no resonant point
is found.
Shock – Non-Operating REF: 100 g’s, 1/2 sine, 11 ms duration, 3
shocks per surface (18 total).
Transportation REF: Qualified under NTSC Test Proce-
dure 1A, Category II (24-inch drop).
Humidity REF: Will operate at 95% relative humidity
for up to five days. Meets the five-day
cycling humidity test as called out in
Tektronix standard 062-2847-00.