The ESR/ NMR control unit is used in conjunc-tion with the ESR module (1022705) to investi-gate electron spin resonance (ESR) in DPPH (diphenyl picryl hydrazyl) and with the NMR module (1022706) to study nuclear magnetic resonance (NMR) in glycerine, polystyrene and Teflon. 

Resonances can be observed as a result of transitions induced by high frequencies due to changes in an external magnetic field. Reso-nance absorption curves can be viewed using a simple dual-channel oscilloscope. 

The control console provides control and pow-er-supply voltages for the test probe being used and for the pair of coils. It also provides a suitable signal for an oscilloscope and displays the value of the high-frequency signal in Hertz. 

The ESR/NMR control unit numbered 1022700 is designed for 230 V/ 50-60 Hz (±10 %) mains voltage supplies, while 1022702 is for 115 V/ 50-60 Hz (±10 %).

 

 

Equipment supplied:

1 Control console

1 Plug-in power supply, 12 V AC (115 V, 50/60 Hz)

 

Technical data:

Control console

Probe input: 4-pin Lemo socket

Coil connectors: Sawtooth current source, 0 − 250 mA, 50 ms, pair of co-axial connectors

Magnetic field output: proportional to coil cur-rent, 0 to 1 V, BNC socket

Signal output: Resonance signal, 0 to 1V, BNC socket

Frequency range: 45 to 75 MHz approx.(ESR)

11 to 15 MHz approx. (NMR)

 

General data:

Power supply: Plug-in power supply 12 V AC, 2.0 A, coaxial power connector 5.5 x 2,5 mm, cable length: 2m

Operating temperature: 5 °C till 40 °C

Maximum relative 

humidity: 80 % 

Dimensions: console 

170x105x45 mm³

Plug-in power supply

100 x 90 x70 mm³

Weight: approx. 1050 g incl. power supply

 

Electromagnetic compability:

Emission: EN 55011:2009

Immunity: EN 61326-1:2013

 

Electrical safety:

Safety regulations:

                            DIN EN 61010-1

                            DIN EN 61558-2-6

Transformer: safety transformer ac-cording to DIN EN 61558-2-6 

Appliance class: 2

Pollution severity: 2

Type of protection: IP20

 

 

Additionally required equipment:

1 ESR module 1022705 

or

1 NMR module 1022706

1 Digital oscilloscope, 2x30 MHz 1020910

or

1 PC Oscilloscope, 2x 25 MHz 1020857

2 High-frequency cables 1002746