LANGER EMV-Technik HR-E 40-1 User manual

1 / 4
User Manual
Near-field probe:
HR-E 40-1
- Translation -
Intended Use
The HR-E 40-1 near-field probe is a passive probe that converts high-frequency
electric near fields into an electric current or voltage. It may only be used by
persons qualified in the field of EMC to measure near fields. The probe is
designed to be connected to spectrum analyzers, oscilloscopes or similar devices.
Last revised: 2021-04

2 / 4
Safety Instructions
Observe the operating and safety instructions for all devices used in the set-up.
Never use any damaged or defective devices.
The use of this near-field probe to test devices with voltages higher than safety
extra-low voltage (SELV) is only permitted for trained personnel. Additional
protective measures such as using an isolating transformer, additional insulation,
etc. must be implemented to safeguard against electric shocks and to minimize
the risk of injuries.
Depending on the measured field strength, voltages exceeding the permissible
maximum input voltage of the connected device may be generated at the probe's
output. Under certain circumstances, this may also occur with short-term events,
such as short-circuits, high inrush currents, and so on. Employ protective
measures, such as using attenuation elements, transient limiters or similar
devices, as required.
The probe tip is sensitive to mechanical stressand is not a guaranteed insulation.
The user is therefore required to provide appropriate insulation to protect the
device under test and the connected measuring device.
Technical Parameters
Upper frequency limit
40 GHz
Lower frequency limit
Depending on the measuring device
Resolution
0.2 mm
Inner distance of the measuring electrode to
the measuring tip
about 0.5 mm
Output resistance
50 Ω
Connection - output
2.92 mm (K), female, jack
Weight
19 g
Sizes (L x W x H)
(145 x 9 x 9) mm
Table 1: HR-E 40-1 technical parameters

3 / 4
Connecting an RF Cable to the HR Probe
Required tools:
-Torque wrench 8 mm (5/16 inch) / 0.9 Nm (8 in.-lbs.)
-Open-end wrench 1/4 inch
Please check the connectors. All connectors must be undamaged, clean and
within mechanical specification.
1. Push the connectors straight together so that they can engage smoothly (do
not tilt or twist).
2. Turn only the plug nut until it is hand-tight and make sure that you do not cross
the threads.
3. Use the torque wrench to make the final connection. Tighten the connection to
full torque. Use the open-end wrench to prevent the probe from rotating.

4 / 4
Separation of an RF Cable from the HR Probe
Required tools:
-Open-end wrench 1/4 inch
-Open-end wrench 8 mm (5/16 inch)
Do not use the torque wrench to loosen the connection!
1. Use the 0.25 inch open-end wrench to prevent the probe from rotating.
2. Use the 8 mm (5/16 in.) open-end wrench to loosen the connection.
3. Complete the process by hand, turning only the connector nut with your
fingers.
4. Carefully pull the connectors apart (do not tilt or twist).
Operational Notes
Reproducible and reliable conditions are obtained when the probe tip is placed
vertically and centrally on an RF trace. If the probe tip is placed directly on the RF
trace a defined distance (about 0.5 mm) between the RF trace and the measuring
electrode can be achieved.
Resonance processes can be excited in the case of asymmetrical placement and
with PCBs whose width is in the range of one centimeter (the ground plane of
PCBs which are too small can be increased by connecting them electrically with a
larger ground plane).
The measuring tip is decoupled from the probe shaft. Touching the probe near the
probe tip may interfere with the probe function.
The measuring cable must be suitable for this frequency range. The measuring
cable is available on request.
LANGER
Noethnitzer Hang 31
Phone: [phone]
EMV-Technik GmbH
DE-01728 Bannewitz
Fax: [phone]
www.langer-emv.com
[email protected]