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Specifications
WFM 90 and WFM 91 Service Manual
1–11
Table 1–8: Environmental characteristics (Cont.)
Category Description
Vibration — Operating REF: 15 minutes each axis at 0.015 inch, frequency varied from 10 Hz to
55 Hz to 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, 1/2 sine, 11 ms duration, 3 shocks per surface (18 total).
Transportation REF: Qualified under NTSC Test Procedure 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.
Table 1–9: Power source
Category Description
Battery REF: 6 C-sized cell batteries, or Tektronix NiCad battery pack (Tektronix Part
Number. 146-0107-00).
Battery Charge Time REF: Fast Charge: 550 mA.
REF: Slow Charge: 150 mA.
Power Consumption REF: Picture Mode: 5.5 W
Waveform Mode: 7.2 W
Vector Mode: 7.2 W
Operating Time REF: Alkaline Batteries:
Picture Mode: 2.5 hours
Waveform Mode: 2 hours
Vector Mode: 2 hours
NiCad Batteries:
Picture Mode: 4 hours
Waveform Mode: 3 hours
Vector Mode: 3 hours
REF: Fully charged or new batteries.
External Power REQ: DC Source of 11 V to 18 V.
REF: Wall Unit Tektronix Part Numbers:
220 V European TUV 119–4540–00
240 V UK 119–4541–00
240 V Australia 119–4542–00
100 V Japan 119–4539–00
120 V North America 119–4538–00