:AVER:ADV OFF ! ADVANCED FILTER OFF :AVER OFF ! MOVING FILTER OFF !*************************** Misc **************************************** :SENS:CURR:NPLC 10 ! meas. rate 10*0.02 s :SENS:CURR:RANGE 1E-12 ! meas. range for 1E pA and 100 fA ! CHANGE THIS FOR THE HIGHER CURRENTS: 1E-11 and 1E-10 :SYST:AZER:STAT ON ! Auto Zero ON (side effect: this doubles the measurement time!) The data transfer to the computer is initiated by the command: :READ? The instrument will respond with a text string giving the measured current in ampere. Operating instructions for the PTW Unidos E Annex A4 The instrument was designed for use as a dosimeter and then modified. Therefore it is has some more functions than needed for the comparison. It can measure electrical charges as well as electrical currents. In our case only the current range is used. The instrument may be programmed remotely using the RS-232 interface. RS-232 parameters: 9600 Baud, 8 bits, no parity, 1 stop-bit. As manual range setting is quite simple, only this method will be described here: Key [MOD] : toggles between the modes Charge and Current. Key [RGE] toggles between the ranges Low (max. 112 pA), : (max. 12.5 nA) Med and High (max. 1.2µA). Key [NUL] starts a zeroing procedure which takes 130 s. : For all current values the correct setting is: and “Current” “Low”. After warming up, the zeroing procedure must be started. The instrument has a built-in filter algorithm which can be adjusted only via the RS-232 interface by the undocumented parameter “CUA”. The setting after power-on is This leads to the fact that successive measurements are strongly “CUA 10”. correlated. To circumvent this, the undocumented command CUA 1
:AVER:ADV OFF ! ADVANCED FILTER OFF :AVER OFF ! MOVING FILTER OFF !*************************** Misc **************************************** :SENS:CURR:NPLC 10 ! meas. rate 10*0.02 s :SENS:CURR:RANGE 1E-12 ! meas. range for 1E pA and 100 fA ! CHANGE THIS FOR THE HIGHER CURRENTS: 1E-11 and 1E-10 :SYST:AZER:STAT ON ! Auto Zero ON (side effect: this doubles the measurement time!) The data transfer to the computer is initiated by the command: :READ? The instrument will respond with a text string giving the measured current in ampere. Operating instructions for the PTW Unidos E Annex A4 The instrument was designed for use as a dosimeter and then modified. Therefore it is has some more functions than needed for the comparison. It can measure electrical charges as well as electrical currents. In our case only the current range is used. The instrument may be programmed remotely using the RS-232 interface. RS-232 parameters: 9600 Baud, 8 bits, no parity, 1 stop-bit. As manual range setting is quite simple, only this method will be described here: Key [MOD] : toggles between the modes Charge and Current. Key [RGE] : toggles between the ranges Low (max. 112 pA), Med (max. 12.5 nA) and High (max. 1.2µA). Key [NUL] : starts a zeroing procedure which takes 130 s. For all current values the correct setting is: “Current” and “Low”. After warming up, the zeroing procedure must be started. The instrument has a built-in filter algorithm which can be adjusted only via the RS-232 interface by the undocumented parameter “CUA”. The setting after power-on is “CUA 10”. This leads to the fact that successive measurements are strongly correlated. To circumvent this, the undocumented command CUA 1
EURAMET-P1260_ELECT_Technical-Protocol1.docx