L3Harris narda PMM EP-600 User Manual page 93

Command Description
This query command #00?v* sends back a string containing information about model,
?v
release and date of firmware.
Example of reply to the command #00?v*: "vEP600:1.02 10/05;"
This query command #00?p* sends back a string containing information about date of
?p
calibration.
Example of reply to the command #00?p*: "10/05;"
This query command #00?b* sends back 3 bytes containing information about the
?b
voltage of EP-600 battery.
The array is made of 3 bytes in which the first is the character 'b' followed by 2 bytes
Battery
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)
This query command #00?t* sends back 3 bytes containing information about the
?t
temperature of EP-600 probe.
The array is made of 3 bytes in which the first is the character 't' followed by 2 bytes
Temperature
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
This query command #00?s* sends back a string containing the serial number of the
?s
device
Serial
Example of reply to the command #00?s*: "s123456789AAAA"
Number
This query command #00?T* sends back 5 bytes containing information about the total
?T
field strength measured by EP-600.
Total Field 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
This query command #00?A* sends back 13 bytes containing information about field
?A
strength measured by EP-600 of every single axis.
All Field The array is made of 13 bytes in which the first is the character 'A' followed by 12 bytes
Components
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.
Table 6-1 Query Commands
Communication protocol 6-3