Source voltage, measure current, get data.
Whatever your experimental needs, the Ossila Source Measure Unitwill simplify & accelerate your data collection.
The ability to control instruments is a key skill for experimental scientists and engineers. We’ve designed the Source Measure Unit so that no matter what your skill level is, you can access affordable, precise instrumentation. Accelerate your data collection today with this high-performance, low-cost measurement equipment!
The Source Measure Unit incorporates two voltage source meters for measuring current and two voltage meters for measuring voltage. With it, you can measure a wide range of research devices including photovoltaics, LEDs and OLEDs, transistors, and more. This product is covered by our FREE 2-year warranty.
Features
Five current ranges - Choose between five separate current ranges to suit your experimental needs (refer to specifications).
User-friendly PC software - The Source Measure Unit can be used without any prior coding experience! The included PC software comes with pre-set modes, allowing you to perform simple measurements (e.g setting voltages, measuring currents). Data can be saved in csv format for convenient analysis.
Flexible & scalable communication - Connect the Source Measure Unit via USB or Ethernet. Several units can be used at the same time via Ethernet connection.
Software-controlled current ranges - For safety and convenience, the current range switches can be controlled using the included PC software - so there is no need for manual adjustment.
Wide language compatibility - All common programming languages (LabVIEW, Matlab, C, Java, Fortran, Python, Perl etc) are compatible with the unit.
The source measure unit contains four instruments on one board - two SMUs (voltage source, current sense) and two precision voltage sense channels. There Is also a general-purpose shutter/trigger which enables it to control (or be controlled by) other instruments.
Source Measure Units (SMU 1 & SMU 2)
The SMUs output a voltage and then measure both the voltage and current. The output voltage is always measured on the output to the BNC, rather than assuming it is at the set voltage. This is to account for any load effects, for example, short circuiting the output, or low impedance causing a small drop in voltage. Each source measure unit has multiple current ranges, so that you can measure both large and small currents with accuracy.
Voltage source specifications:
| Range | Accuracy | Precision | Resolution |
|---|---|---|---|
| ± 10 V | 10 mV | 333 µV | 170 µV |
Voltage measure specifications
| Range | Accuracy | Precision | Resolution |
|---|---|---|---|
| ± 10V | 10 mV | 50 µV | 10 µV |
Current measure specifications.
| Range | Max Current | Accuracy | Precision | Resolution |
|---|---|---|---|---|
| 1 | ± 150 mA | ± 200 µA | 10 µA | 1 µA |
| 2 | ± 20 mA | ± 10 µA | 1 µA | 100 nA |
| 3 | ± 2 mA | ± 1 µA | 100 nA | 10 nA |
| 4 | ± 200 µA | ± 100 nA | 10 nA | 1 nA |
| 5 | ± 20 µA | ± 10 nA | 1 nA | 0.1nA |
Precision Voltage Meter Specifications (Vsense 1 and Vsense 2)
The voltage meters are designed to accurately sense small voltages while also having a wide dynamic range (±10 V).
| Range | Accuracy | Precision | Resolution |
|---|---|---|---|
| ±10 V | 10 mV | 50 µV | 10 µV |
Shutter/Trigger
The Shutter/Trigger can be used either as an input or an output. It can be used to send a trigger signal to other instruments or configured to wait for a trigger from other instruments. The voltage level of this BNC is 5V - any higher may cause damage to the port.
Programming Languages
The X200's user-friendly design will work almost any programming language (at least anything that supports either serial COMs or Ethernet, which is nearly everything commonly used). Common languages that can be used to interface to it are:
- Python
- LabVIEW™
- MATLAB
- Java
- VB
- Fortran
- C / C++
- Perl
Physical Specifications
| Computer Connectivity | USB-B and Ethernet |
| Measurement Connections | BNC connector |
| Dimensions | Width: 125 mm Height: 55 mm Depth: 185 mm |
The Ossila Source Measure Unit includes a software Front Panel that enables you to start taking measurements as quickly as possible. With the program you can control each SMU and Vsense channel independently, allowing you to perform many of the most common electrical measurements.
Key Features
- Set voltage and measure current with two independent SMU channels.
- Measure voltages with the two Vsense channels.
- Set sampling rates (OSR) for the SMUs and Vsense channels.
- Save data within easy-to-use spreadsheet (.csv) or text (.txt) files.
Other Software
We also have software for performing specific measurements with the Ossila Source Measure Unit. These can be downloaded for free from our software and drivers page. The currently available measurements are:
- I-V curves
- Solar cell characterisation and lifetime
- Four-point probe sheet resistance
Software Requirements
| Operating System | Windows Vista, 7, 8, or 10 (32-bit or 64-bit) |
| CPU | Dual Core 2 GHz |
| RAM | 2 GB |
| Available Hard Drive Space | 116 MB |
| Connectivity | USB 2.0, or Ethernet (requires DHCP) |
You can use the Source Measure Unit in many applications, and some are mentioned below. Most lab-scale devices that require electrical characterisation in the DC (or low frequency) range (between ±10 V and ±150 mA per channel) can be measured with the source meter.
For complete 'out-of-the-box' measurements, please see the measurement systems on our Test and Measurement page. For guides on how to program the source measure unit, please see our Getting Started page. For programming in Python, please see our more extensive Scientific Python Tutorials.
| Devices & Uses | Example Measurement Types |
| Photovoltaics | IV Curves, lifetime measurements, maximum power point tracking etc |
| LEDs and OLEDs | IV Curves, Lifetime |
| Sheet Resistance | 4-Point Probe |
Product Reviews of the Ossila Source Measure Unit
"The Source Measure Unit is a professional alternative to old-fashioned and outdated bench top source-measure units at a fraction of cost. Ossila's product was thoroughly tested by us, it had to compete with state-of-art devices and to our surprise it won the race in all categories: precise PV measurements, networking capabilities, flexibility of programming language and smooth operation in pretty tough chemical/material science laboratories. The Ossila team has delivered a game changer for all of the PV community."
Adam Surmiak
- PhD Student in Excitonic Systems for Solar Energy Conversion, Monash University - Australia
To the best of our knowledge the technical information provided here is accurate. However, Ossila assume no liability for the accuracy of this information. The values provided here are typical at the time of manufacture and may vary over time and from batch to batch.
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ps：大皿和6孔板里细胞密度、培养条件等等都几乎一样。
我看园子里有人提过类似的问题，但还没人给出答案，希望有经验或有想法的战友帮忙分析分析啊~谢谢！
它最初由在德国生物学家罗伯特·科赫手下工作的细菌学家朱利斯·理查德·佩特里（1852－1921）于1887年设计，故又称为“佩特里皿”。
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其实就是常见的圆形的上下盖培养皿，你可以看看它的英文，就叫做petri dish，直译过来就叫做——佩特里小碟子——也就是皮氏培养皿
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第二，三段为原创手打……第一段为摘抄
做细胞实验快半年了，一直都还挺顺的，这次五一放完假回来，复苏一支HK2，操作都跟以前一样，没想到出了好多问题：
冻存方法：包裹棉花直接-80℃过夜，第二天转移到液氮
冻存时间：1个半月前冻存的细胞，密度保证没问题，冻存前状态也好
复苏方法：液氮取出后37℃水浴，约2分钟溶解，加入6倍体积的完全培养基，800转离心5分钟，弃去上清，1ml完全培养基重悬，转移入培养皿（进口一次性塑料培养大皿），补足完全培养基，培养箱培养
第二天看细胞全都没贴壁，但是也没死，聚集成团装飘着，没有污染。不想重新离心加重机械损伤，就一直试试看的心态放在培养箱里养着了。又重新复苏一支，还是一样的结果，全飘着没贴壁。不死心，就往前面复苏的那一皿里直接加了1ml的血清，相当于18%的血清比例，过了一天去看，这下细胞都贴壁了。没有另外添加血清的那一皿就还是没贴壁。
另外还有一支以前复苏的HK2，也是一样的方法复苏的，那次复苏很好，细胞基本没什么死的，也都贴壁了，养在皿里状态也不错，但是拿来铺板就还是不贴壁，同样的培基（10%血清），铺板就一个不贴，皿里就都可以贴上。
求助各位战友：
1、复苏不贴壁是为什么？
2、增加血清比例能使复苏的细胞贴壁，这样的细胞是不是可以认为状态并不好，以后的培养是不是要一直这么高比例的血清？还是可以培养一段时间逐步减少血清比例？
3、仍然是10%血清，为什么铺板就不贴壁，而皿里的就没事？是不是铺板的时候也要增加血清比例呢？那在板里干预的过程中是不是要一直保持高比例的血清培养？
4、我的冻存及复苏方法是否有错？我觉得我的HK2从形态、生长速度上来说状态应该是不错的，而且我已经更换了全新的培基、血清和双抗，重新配置了完全培养基，不知道为什么会出现这种不贴壁的问题
拜托各位集思广益，细胞实验已经为了这个不贴壁的问题停滞快2周，心急如焚啊，拜托各位！
同学说传代必须是一皿传多皿，一皿传一皿就不算传代~求高手指点~~
传代后5天，依然没有长满，怕影响活力，想传代和冻存，不知这样是否可以？？
想问下各位大神，本人用皿养的PC-9GR细胞突然有大片飘起，也并没有成团状飘起，求解决方法？
实验需要请问有没有养THP-1细胞的同仁？能否寄一皿我，我在广州南方医科大学，不胜感激！
