EA-1 User Manual
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All Ranges ($AR):
$AR[CR] –> * 2 AUTO 10.0W 3.00W 300mW 30.0mW [CR][LF] {Returns a list of all available power ranges (scales) (or
energy scales if sensor is set to measure energy) including an index value showing which range is presently selected.
In the example shown above, top scale (index 0) is 10W, scale 1=3W, scale 2=300mW, scale 3=30mW, and an auto-
ranging scale is also available ("AUTO" corresponding to index -1). The "2" is the index and indicates that range 2
(300mW) is currently selected. See also $RN and $WN commands, the index value is the same as defined for those
commands}.
Write Range ($WN):
$WN 0[CR] –> *[CR]. Changes power or energy range. Parameters: 0=highest (least sensitive) range. 1=next range
down. -1=Autorange (if available). Maximum allowed range is as defined by $AR command. Power-up settings will be
saved using $HC command, see below.
Note:
After using the $WN command, the software should wait ~3s before resuming power measurements with the
$SP command.
Read Range ($RN):
$RN[CR] –> *1[CR] {Reads present chosen range, returns as parameter defined in $WN and $AR}
Save Sensor Configuration Settings ($HC):
$HC [S|C|R] [CR] -> *[CR] {Saves the present sensor settings as the power-up defaults. Parameter should be “S”
(startup settings), “C” (calibration settings) or “R” response tweak setting}
Note:
In order to change the power-up defaults, the following sequence is necessary:
a. Set desired setting, e.g. power range using $WN command
b. Save chosen settings using $HC S command
c. If the incorrect parameter is sent, “?PARAM ERROR” is returned}
Force Power Command ($FP):
$FP[CR] -> *[CR] {Forces sensor into power mode. Stops sensor measuring energy. Sending $HC S command after
$FP will set sensor to start up in power mode}
Filter Query ($FQ):
$FQ <1 | 2> [CR] Query and set the photodiode filter setting (IN or OUT), for photodiode sensors only.
Response is “* <code> <option 1> <option 2>” where “code” is the index of the option presently chosen (1 or 2); and
options 1 and 2 are the two options offered for this sensor, for example OUT and IN.
For some sensors, for example 3A-IS, only one option is available; for thermopile sensors the command will return an
error message.
Parameters:
No parameter, or 0: Query for present filter setting, example response “* 1 OUT IN”
1: Configure head for Filter OUT mode, response “* 1 OUT IN”
2: Configure head for Filter IN mode, response “* 2 OUT IN”
Examples:
a) 3A-IS sensor:
$FQ -> “*1 N/A”. As there is only 1 setting the command is not applicable in this case, there is nothing to change.
b) regular PD300 sensor with filter IN/OUT:
$FQ -> “* 1 OUT IN”. Sensoris presently in Filter IN mode.
$FQ 1 -> “* 1 OUT IN”. Sensor has been configured to Filter OUT mode.
$FQ 2 -> “* 2 OUT IN”. Sensor has been configured to Filter IN mode.
$FQ 3 -> “?FILTER SET UNAVAILABLE”. Invalid setting and sensor remains in previous filter mode.
c) Thermopile sensor:
$FQ -> “?NOT A PHOTO HEAD”. Sensor does not support this command.
Note:
To save new setting as startup default, use $HC S command.