Martel Electronics BetaGauge 321A - Manual (Page 5)

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• Connect the common test lead before you connect the live test lead. When you
disconnect test leads, disconnect the live test lead first.
• Do not use the calibrator if it operates abnormally. Protection may be impaired. When in
doubt, have the calibrator serviced.
• Do not operate the calibrator around explosive gas, vapor, or dust.
• When measuring pressure, make sure the process pressure line is shut off and
depressurized before you connect it or disconnect it from the pressure module.
• Disconnect test leads before changing to another measure or source function.
• When servicing the calibrator, use only specified replacement parts.
• To avoid false readings, which could lead to possible electric shock or personal injury,
replace the battery as soon as the battery indicator appears.
Caution
To avoid possible damage to calibrator or to equipment under test:
• Use the proper jacks, function, and range for your measurement or sourcing application.
2. Calibrator Interface
Figure 1 shows the location of the process measurement inputs, while table 1 describes
their use.
Figure 1
Pressure Measurement Inputs
Side View