A-A-50734 Multimeter, RuggedizedThis commercial item description CID, describes a Ruggedized Multimeter. This CID is meant as a minimum requirement for the Ruggedized Multimeter in which only those manufacturers that meet or surpass the following requirements are supplied per this CID.

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A-A-50734B

TABLE I. DC Voltage.

* Least Significant Digit.

2.6.2.2 Input Impedance. The input impedance shall be greater than 9.9 Megohms.

2.6.2.3 Overload. The multimeter shall be capable of continuously withstanding, without damage or blown fuses, 1,000 Vrms on all ranges, except 500 Vrms continuously on the 300.0 mV range.

2.6.2.4 Normal mode rejection ratio. Normal mode noise rejection shall not be less than 60 decibels (dB) at 50 and 60 Hz (±0.15%).

2.6.2.5 Common mode rejection ratio. Common mode rejection, with a 1,000 Ohms unbalanced in the low lead, shall not be less than 120 decibels (dB) at 50 and 60 Hz (±0.15%).

2.6.3 AC Voltage.

2.6.3.1 Range, resolution, and accuracy. Minimum performance shall be as specified in Table

II.

TABLE II - AC Voltage.

RANGE

RESOLUTION

ACCURACY

320.0 mV

3.200 V

32.00 V

320.0 V

1000 V

100 µV

1 mV

10 mV

100 mV

40 Hz to 2 KHz

2 KHz to 10 KHz

10 KHz to 30 KHz

±(0.5%+3 LSD)

±(1% + 3 LSD)

±(2%+3 LSD)

±(3%+3 LSD)

±(4%+10 LSD)

Not to exceed 15%

2.6.3.2 Input impedance. The input impedance shall be greater than 9.9 Megohms.