L3Harris narda PMM EP-600 User Manual page 40

3.3 General requirements The basic components of a field measuring equipment are:
3.3.1 Probes
3.3.2 Connections
3.3.3 Metering equipment The metering/data processing equipment is designed so that the probe
3.4 Basic functional
checks
3.5 Measurement
procedures
3-2 Measurements
- field probe (field sensor and transducer)
- connecting cables
- metering and data processing equipment
As a general rule the field probes must respect the following conditions:
• High rejection to spurious signals
• No perturbation of the field surrounding the sensors
• Such connecting cables e.g. fiber optics that do not perturb the field to
measure
• Known response to the operating ambient
The connection between field probe and metering equipment transfer the
data relevant to the measurements and the probe/converter settings
without influencing the measure.
Also, unwanted couplings and noise pick-up must be avoided.
Fiber optic connections do perfectly meet the requirements.
signals or data are properly read, displayed and stored.
Some basic functional checks are:
- check of the proper probe operation
- check for the readings not varying significantly when rotating the probe
along one of its axis
The measurement procedures must minimize:
• Risks of exposure of personnel to hazardous electromagnetic fields
• Measurement errors
• Interferences
• Damages to the equipment