PMS221A PMK

PMS 221A High impedance passive probe Features: TM CeramCore hybrid probe Modular construction Coaxial design Interchangeable spring contact tip New IC contacting system for 0.8 to 1.27 mm pitch Unbreakable reed switch The PMS 221A is a 150 MHz, standard sized, 1:1 and 10:1 switchable passive probe designed for instruments having 1 M input resistance. This type of probe is recommended for general purpose probing applications and is adjustable for low frequencies. The probe is rated with 300 V CAT II maximum input voltage and complies with latest safety standards. Like every PMK passive probe TM the PMS 221A features CeramCore technology. The probe s entire core is made of a high quality ceramic hybrid. Pure coaxial design and laser trimmed resistors ensure highest signal fidelity along the signal path offering high bandwidth and fast risetimes for accurate impulse measurements. All switchable probes offer unbreakable coaxial reed switches for changing between attenuation modes. Our passive probes are equipped with PMKs signature spring loaded, needle sharp tips to support precise and safe measurements minimizing the risk of slipping off the board and produce a short circuit. Various types of tips are available. Besides the spring contact tips there is also a solid tip available at the users choice. Probe tips are interchangeable and can be replaced easily. Basic probe accessories and replacement tips are provided within the scope of delivery or can be purchased separately. The probes mechanical construction is modular and therefore spare probe leads are available. See this datasheet and corresponding documents for further details. Thank you for your interest in our product 2007 PMK GmbH 1PMS 221A Datasheet This datasheet supersedes all previously published material. Specifications that are defined typical are not guaranteed and are published as general information to the user. The instrument should have warmed up for at least 20 minutes and the environmental conditions must not exceed the spe- cified limits of the probe. Note that specifications are subject to change without notice. Electrical specifications (1) Attenuation ratio (switchable) 1:1 10:1 2 % at DC (at 10:1) Voltage coefficient 0.0025 % / V (typical) (2) Probe bandwidth 20 MHz 150 MHz (-3 dB) Probe risetime 18 nsec 2.4 nsec (10 % 90 %) (typical) (3) Maximum rated input voltage Measurement category I: 400 V rms, 1250 V transient overvoltage Measurement category II: 55 V rms, CAT II 300 V rms, CAT II Pollution degree 2 Voltage derating Typical voltage derating PMS221A (switched to 10:1) Measurement category I 400 300 Note that the max. input voltage rating of the probe decreases as the frequency of the applied signal 200 increases. 100 0 0,1 1 10 100 1000 Frequency MHz (1) Connected to oscilloscope with an input impedance of 1 M 1 %. (2) at 15 pF input capacitance of the measuring instrument. (3) As defined in IEC 61010-031. 2007 PMK GmbH 2 Amplitude AC rms V sinus