L3Harris narda PMM EP-600, Руководство пользователя

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Communication protocol 6-3
Table 6-1 Query Commands
Command Description
?v
This query command #00?v* sends back a string containing information about model,
release and date of firmware.
Example of reply to the command
#00?v* : "vEP600:1.02 10/05;"
?p
This query command
#00?p*
sends back a string containing information about date of
calibration.
Example of reply to the command
#00?p* : "10/05;"
?b
Battery
This query command #00?b* sends back 3 bytes containing information about the
voltage of EP-600 battery.
The array is made of 3 bytes in which the first is the character ‘b’ followed by 2 bytes
expressing a 16bit unsigned integer (
nn ) in Big Endian notation.
To get the battery voltage use the following formula:
V_battery=
3 * (nn / 1024 * 1.6)
?t
Temperature
This query command #00?t* sends back 3 bytes containing information about the
temperature of EP-600 probe.
The array is made of 3 bytes in which the first is the character ‘t’ followed by 2 bytes
expressing a 16bit unsigned integer (
nn ) in Big Endian notation.
To get the temperature in degrees Centigrade use the following formula:
T_ep600=
((nn / 1024 * 1.6) - 0.986) * 1000 / 3.55
?s
Serial
Number
This query command #00?s* sends back a string containing the serial number of the
device
Example of reply to the command
#00?s* : "s123456789AAAA”
?T
Total Field
This query command #00?T* sends back 5 bytes containing information about the total
field strength measured by EP-600.
The array is made of 5 bytes in which the first is the character ‘T’ followed by 4 bytes
expressing a 32bit IEEE floating point number(
ff ) in Little Endian notation.
The figure
(ff)
represents the square of total field strength (isotropic measure)
To get the field strength, the square root must be taken:
V/m=
√
ff
?A
All Field
Components
This query command #00?A* sends back 13 bytes containing information about field
strength measured by EP-600 of every single axis .
The array is made of 13 bytes in which the first is the character ‘A’ followed by 12 bytes
expressing 3 (X,Y,Z) 32bit IEEE floating point number(
ff ) in Little Endian notation.
The 3 figures (fx,fy,fz) directly represent the field strength of related axis and are
expressed in V/m.