Specifications
WFM 90 and WFM 91 Service Manual 1–5
Characteristics Tables
The characteristics tables use the following abbreviations:
Performance Requirement. All performance requirements in the characteristics
tables are identified with Req
and can be assured by performing the procedures
in the Performance Verification section. Allow a warm-up time of 20 minutes
before performing the procedures.
Performance requirements in the electrical specifications are valid over an
ambient temperature range of +20° C to +30°C. The Performance Requirement
tolerances listed in the electrical specifications are doubled over the temperature
range of 0°C to +40°C, unless otherwise specified. Test equipment used to
verify performance requirements must be calibrated and working within the
limits specified in Equipment Required on page 4–2.
Reference Information. Information that amplifies a performance requirement or
is of special importance is indicated by REF. There is no need to check these
items to a specific tolerance.
The following safety standards apply to the WFM 90 or WFM 91 Handheld
Waveform, Vector, Picture, and Audio Monitor:
ANSI/ISA S82. Safety Standard for Electrical and Electronic Test, Measuring,
Controlling, and Related Equipment.
CAN/CSA C22.2 No. 1010.1-92. Safety Requirements for Electrical Equipment for
Measurement, Control, and Laboratory Use.
IEC1010-1. Safety Requirements for Electrical Equipment for Measurement,
Control, and Laboratory Use (1990).
UL3111. Standard for Electrical Measuring and Test Equipment.

Safety Standards