The Models NHQ 202M-206L HV supplies are a two channel high voltage version in a NIM chassis. Modern patented circuit principles in connection with the latest SMT manufacturing technologies permit the design and construction of very compact high voltage supplies with excellent specifications.
All NHQ models are 1 slot wide, and offer either manual control or operation via RS232 Interface. The use of this interface supports more then the manual control functionality.
The high voltage supplies provide high precision output voltages together with very low ripple and noise, even under full load. Separate 10%-step hardware switches enable to set voltage and current limits. An INHIBIT input provides instant shutdown to protect sensitive detector devices.
Additionally, the maximal output current per channel is programmable via the interface. The high voltage outputs protected against overload and short circuit. The output polarity can be selected by manual rotary switches accessable from the side of the module without having to take the side-cover off.
The output voltage can also be set by software through the RS232C interface. The chosen polarity is displayed by a LED on the front panel and a sign on the LCD display. It is not allowed to change the polarity under power! An undefined switch setting (not at one of the end positions) will cause no output voltage.
For effective protection of connected devices the maximum output voltage and current can be selected in 10%-steps with the rotary switches Vmax and Imax (switch dialed to 10 corresponds to 100%). An output voltage or current exceeding the set limit is signalled by the red front panel error LED.