Model 831 Manual Optional Accessories 1-7
•BAT012 100AH Battery
•BAT013 2X21AH batteries
Weather Data Acquisition
• 831-INT 831 Interface Unit for use with 426A12
Outdoor Microphone Preamplifier and weather
sensors
The SEN028, SEN029, and SEN030
are no longer supported.
• SEN028 Wind Monitor; Speed and Direction
• SEN029 Anemometer; Speed and Direction
(Low Cost)
• SEN030 Sensor; Temperature and Humidity
• SEN031 Sensor; Weather Station
Communication DVX008A
• MDMUSB-A Modem V.90 Dial-up with USB
Interface
• MDMUSB-E Modem Edge USB Wireless Quad-Band
GSM
• DVX008A USB to RS232, 9 Pin Adaptor
• CBL117 Serial Null Modem Cable, Connects
DVX008A to PC Serial Port
• 831-INT-ET 831-INT with integrated Ethernet
capability
GPS
• GPS001 GPS Receiver, USB Magnetic Mount
Equivalent Electrical Impedance Adaptor
An equivalent electrical impedance adapter can be used in
place of the microphone when very high impedance
measurements need to be made and the instrument is being
tested electrically. The adapter is simply a series capacitor
with the same capacitance as the microphone it is replacing.
The following adapters will be available for sale. If square
wave pulse measurement is to be performed, then the
adapter must also be used with a 100 kHz, low pass, T filter.
• ADP002 6.8pF BNC Input Adaptor for 1/4 in., 7pF
microphone equivalent
• ADP090 12pF BNC Input Adaptor for 1/2 in., 12pF
microphone equivalent
• ADP092 BNC In-Line Low Pass Filter 75kHz
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