Voltmeter Unipan 237 (Unipan-237, Unipan237)
Device Unipan Voltmeter 237 can be used for measuring small values of AC voltages on the background noise and interference to noise and harmonic spectral analysis processes and the harmonic noise processes, as a high balance indicator different bridge circuits alternating current as a measuring amplifier with a bandwidth of 0.3 Hz -300kHz (error -3 dB) for photometric and spectrophotometric measurements using the appropriate converters, for research in the field of solid state physics, nuclear engineering, physical chemistry, and in other areas where it is necessary to measure very small values of physical quantities that can be converted into electrical signals; as broadband microvoltmeter range from 1Hz to 100KHz.
The range of frequencies of the device voltmeter Unipan 237 1 Hz-99, 9 kHz. (Fixed-tuned by switching up to the third digit (three decades), overlapped 5 bands). Frequency subbands
1Hz-9 99Gts (through 0.01 Hz)
99-10Hz, 9Hz (after 0.1 Hz)
100Hz-999Gts (at 1 Hz)
1kHz-9 99kGts (in 0.01 kHz)
10 kHz-99, 9 kHz (over 0.1 kHz)
Error of frequency at fixed points - 1%. The boundaries of the normal operating range of frequencies and instrument voltmeter Unipan 237, the device 237 with preamps 233.5,6,7, the device 237 with preamps and transformers 233.7.1,2,3 233.7 correspond to the data given in Table 1.
Measurement range (at full deflection)
Actually instrument voltmeter Unipan 237: 1mkV-3mkV-10mkV-30mkV-100mkV-300mkV; 3mV-1 mV-10mV, 30mV, 100mV.
The device 237 with a preamplifier 233.5: 100nV-10mV;
The device 237 with a preamplifier 233.6: 300nV-30mV;
The device 237 with a preamplifier 233.7: 100nV-10mV.
Voltmeter Unipan 237 preamplifier with 233.7 and the input transformer 233.7.1,2,3 10 nV-300mkV.
Basic measurement error voltage, expressed in% of the provision device in a normal frequency range of measured voltages in the range indicated in Table 1
Photos UNIPAN 237