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Model 4225-RPM and Model 4225-RPM-LR Remote Pulse Module Instructions 

 

PA-1086 Rev. A October 2020 

 

Included accessories 

The following cables, adapters, and accessories are included in the remote pulse module kit. 

Figure 2: 4225-RPM and 4225-RPM-LR accessories 

 

Item 

Description 

Keithley part number 

Quantity 

RPM interconnect cable, 2.4 m (8 ft) 

CA-547-2.4 

Triaxial to BNC adapter (guard removed) 

CS-712 

BNC-SMA female adapter 

CS-1247 

SMA to SMA cable, 20 cm (8 in.) 

CA-452 

Protective cap 

CAP-47 

Triaxial caps (for shielding, not shorting) 

CA-31 

Not shown 

Support bracket 

4200-322 

Not shown 

Captive panel screw (for support bracket) 

FA-243-2 

Not shown 

Allen socket head capscrew, #4-40 x 5/16" 

4-40x5/16SOHBLK 

Not shown 

Hex wrench, 3/32 in. 

TL-32 

 

Available cable kits 

Model 4210-MMPC High Performance Triaxial Cable Kits (ordered separately) make it easy to connect either 

RPM to a prober, simplifying switching between dc I-V, C-V, and pulsed I-V testing configurations. These 

optional kits are customized for various probers. One kit is required for each pin of the device under test (DUT). 

For additional information, see the 

Keithley Instruments website

 (

tek.com/keithley

). 

 

Содержание 4225-RPM

Страница 1: ...hat automatically switches between precision dc source measure units SMUs C V and the ultra fast pulsed I V instruments In addition the Remot Preamplifier Module RPM extends the low current measuremen...

Страница 2: ...ve cap CAP 47 2 6 Triaxial caps for shielding not shorting CA 31 4 Not shown Support bracket 4200 322 1 Not shown Captive panel screw for support bracket FA 243 2 1 Not shown Allen socket head capscre...

Страница 3: ...PMU and used by the PMU as well as the RPM modules Multi measurement Prober Cable Kit documents These are guides for the optional 4210 MMPC kits that are customized for various probers Switching and c...

Страница 4: ...problems that may affect proper ranging and LLEC operation do not mix 4225 RPMs and 4225 RPM LRs in one system Use either all 4225 RPMS or all 4425 RPM LRs Connections from the 4225 PMU to an RPM The...

Страница 5: ...ions PA 1086 Rev A October 2020 5 Connections to a 4 terminal device The following illustrates the connection to a 4 terminal device using the cabling and adapters that are included with either RPM or...

Страница 6: ...PA 1086 Rev A October 2020 Typical 2 terminal connections The following figure illustrates the connections to 2 terminal devices using the optional MMPC cabling This figure shows two 4225 RPMs or 4225...

Страница 7: ...225 RPM LR extends the lower current ranges of the 225 PMU This is especially important for devices like diodes or transistors that have I V curves that extend over several decades of current The auto...

Страница 8: ...to be lower than the programmed source voltage The output resistance of a pulsing instrument causes this effect This resistance causes a reduction in output voltage at the test device when current fl...

Страница 9: ...put but this is typically between 2 and 3 not including cable resistance It also exhibits the load line effect but to a much lesser degree than the 4225 RPM The following figure compares the load line...

Страница 10: ...n these current ranges the RPM acts as a preamplifier for pulse current measurements Above the 10 mA range the RPM is bypassed and the current measurement occurs in the 4225 PMU which has 50 of output...

Страница 11: ...may be connected to mains These instruments will be marked as category II or higher Unless explicitly allowed in the specifications operating manual and instrument labels do not connect any instrument...

Страница 12: ...cumentation explains hazards that could damage the instrument Such damage may invalidate the warranty The CAUTION heading with the symbol in the user documentation explains hazards that could result i...

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