ベンチトップ型フォトダイオード増幅器


  • Current Measurement Ranges: 100 nA to 10 mA
  • Low Noise Operation
  • Single Point Power Calibration

PDA200C

6 Current Ranges
Max. Resolution 10 pA

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バイアス電圧の調整、モニタ制御用アナログ出力および接地用ジャックは、PDA200Cの背面パネルに配置されています。

当社のすべての マウント付きフォトダイオードおよびバイアス型フォトディテクタと組み合わせ可能

特長

  • トランスインピーダンス光電流増幅器(TIA)
  • 全ダイナミックレンジにわたって低ノイズ動作
  • 最高10 pAの分解能で5桁表示
  • シングルポイントのパワー校正に対応
  • 両極性(CG とAG)のフォトダイオードをサポート
  • バイアス電圧の調整が可能
  • 入力増幅器とフォトダイオードの暗電流のオフセットを補正
  • RoHS 対応

フォ トダイオード増幅器PDA200Cは、非常に小さいフォトダイオード電流を低ノイズで増幅します。この増幅器の最高分解能は10 pAで、100 nA~10 mAフルスケールの6種類の電流範囲に対応します。このユニットはカソード接地(CG)とアノード接地(AG)のフォトダイオードにお使いいただけます。 この増幅器は、光起電性または光伝導性モードのどちらかで動作します。バイアス電圧が調整可能なため、応答の線形性が向上して周波数応答も増加していま す。このフォトダイオード増幅器は、当社のすべてのマウント付きフォトダイオードおよびバイアス型フォトディテクタに対応しています。SM05ネジ規格のマウント付きフォトダイオードにはメス型のSMAコネクタが付いています。BNCコネクタに変換する場合は、アダプターケーブルまたは電気アダプタのいずれかをご使用いただけます。 


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ベンチトップ型フォトダイオード増幅器PDA200CをBNCケーブルを使用してSM1ネジ付きマウント付きフォトダイオードに接続 

アップデートされているPDA200Cシリーズの光電流増幅器は、RoHSに準拠しています。また、電流測定範囲も変わっていますが、ほかの特長は以前のPDA200シリーズ増幅器と同じです

当社ではこれらの増幅器を24か月ごとに校正することをお勧めしております。当社では再校正サービスを提供しております。詳細は当社までお問い合わせください。

PDA200C Specifications
Full Scale Current Measurement Ranges100 nA to 10 mA (in Decade Steps)
Maximum Resolution10 pA
Display Range0 to 10000 (CG)
0 to -10000 (AG)
Polarity of the PhotodiodeCathode Grounded (CG)
Anode Grounded (AG)
Bias Voltage0 to -10 V (CG)
0 to +10 V (AG)
Photodiode Sensitivity (for Calibrated Power Display)0.05 to 2 A/W
Max. Photodiode Capacitance for
Frequency Compensated Operation
10 nF
Temperature Coefficient<50 ppm/°C
Input Impedance~0 Ω (Virtual Ground)
Photo Current Monitor Output
Output Voltage Range (Analog Output)0 to +10 V (CG)
0 to -10 V (AG)
Conversion Coefficient1 x 103 to 1 x 108
(Depending on Measurement Range)
Conversion Coefficient Accuracy±5%
Noise≤0.02%
(RMS, Full Scale of Current Measurement Range)
Load Resistance>10 kΩ
General Data
DisplayLED, 5 Digits
Connectors for Photodiode Input and Analog OutputBNC
Chassis Ground Connector4 mm Banana Jack
Line Voltage/
Frequency
100 V, 115 V, 230 V +15% -10% each/
50 to 60 Hz
Maximum Power Consumption10 VA
Mains Supply OvervoltageCategory II (Cat II)
Operating Temperature0 to +40 °C
Storage Temperature-40 to +70 °C
Relative HumidityMax. 80% Up to 31 °C,
Decreasing to 50% at 40 °C
Pollution Degree (Indoor Use Only)2
Operation Altitude<2000 m
Warm-up Time for Rated Accuracy10 min
Weight<3 kg
Dimensions without Operating Elements
(W x H x D )
146 x 66 x 290 mm³
Dimensions with Operating Elements
(W x H x D )
146 x 77 x 320 mm³

Measurement
Range
ResolutionAccuracyAnalog PD Current Output
Conversion CoefficientBandwidtha
10 mA1 µA± 0.05% f.s.1 x 103 V/A ±5%500 kHz
1 mA100 nA± 0.05% f.s.1 x 104 V/A ±5%250 kHz
100 µA10 nA± 0.05% f.s.1 x 105 V/A ±5%70 kHz
10 µA1 nA± 0.05% f.s.1 x 106 V/A ±5%20 kHz
1 µA100 pA± 0.05% f.s.1 x 107 V/A ±5%5 kHz
100 nA10 pA± 0.1% f.s.1 x 108 V/A ±5%1 kHz
  • アナログ出力の3 dB小信号帯域幅

フォトダイオード入力

BNC メス

BNC Female

入力範囲: 100 nA~10 mA

アナログ制御出力

BNC メス

BNC Female

0~±10 V。入力抵抗は≥ 10 kΩでなければなりません。

PDA200CPart
xPDA200C Photodiode Amplifier
xOperating Manual
xPower Cord

Insights:光学実験のベストプラクティス

こちらのページでは実験セットアップ時の下記の注意点についてご覧いただけます。

  • 電気信号:AC結合 vs DC結合

このほかにも実験・実習や機器に関するヒントをまとめて掲載しています。こちらからご覧ください。

 

電気信号:AC結合 vs DC結合

機器にAC結合とDC結合の電気入力の選択肢がある場合、変調信号入力に対して、DC結合の方がよい選択であることが多々あります。

Modulated signal with and without a DC Offset
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図1:信号のDCオフセットは信号の平均値です。青い線(ACのみ)の平均振幅は0なので、DCオフセットはありません。赤い信号(ACとDC)は、赤い信号のACオフセットが0ではないこと以外、青い信号と同一です。DC結合は赤い信号を変化させることなく通過させます。AC結合ではDCオフセットを除去し、信号の低周波成分を減衰させます。

AC結合とDC結合
AC結合とDC結合は、入力信号と、機器のその他の電気回路の間のインターフェイスです。

DC結合は直流結合で、本質的にワイヤが信号の入力部に接続しています。この導電結合は直流成分と交流成分である信号の周波数成分すべてを伝送します。図9の赤い線の直流成分は0ではありません。

AC結合の主な特長はコンデンサを信号入力部に対して直列に配置することです。コンデンサはハイパスフィルタとして機能し、阻止コンデンサと呼ばれることもあります。AC結合ではDCならびに低周波成分が大きく減衰されます。このような静電結合は、入力信号からDCオフセットを除去し、AC成分のみを通過させるために使用されます。図1の青い線にはAC周波数成分しかありません。

可能な場合、DC入力をご使用ください
DC入力が好ましい理由は多くあります。低周波数応答性が良く、信号のDC成分をAC成分とともにモニタでき、また信号の周波数成分に影響を及ぼさないため、信号の歪みを生じさせません。

DCオフセットが大きいか、AC入力によるフィルタリングが必要な場合を除き、DC入力をお勧めいたします。DCオフセットが大きいことの問題の1つは、機器の分解能よりも低いレベルまで下げる場合があることです。極端なケースにおいてはDCオフセットにより光のクリッピングや飽和効果が生じる場合があります。

なお、DC入力であっても、信号の歪みがないことは保証されませんのでご留意ください。歪みはデバイスの帯域幅の不足や、終端でのインピーダンスの不一致などほかの理由で起こる場合があります。

Modulated signal before and after high-pass filtering
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図3: 上のグラフの青い曲線のように変調信号によってはDC成分がなくても、少なくない量の低周波成分は存在します。この信号がAC結合のハイパスフィルタによってフィルタイングされると、結果信号に歪みが生じます。緑の線はその1例です。
High Pass RC Filter Response
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図2:コンデンサがベースのハイパスフィルタの周波数応答性をモデル化しています。カットオフ周波数(Fc)は35 Hzで、図3の信号のフィルタリングに使用されました。信号の繰り返し周波数は 200 Hzです。

AC入力を使用する理由
AC結合は信号のDC成分を阻止することにより、信号の全体の振幅を減少させることができます。これにより、機器の測定分解能を向上することができ、また飽和やクリッピングの問題も克服できます。情報伝送を高周波成分で行う場合、そして低周波成分に関心がない場合、AC結合は良い結果をもたらします。また一部の通信用途などDCの周波数成分が容認されない用途においてはAC結合が好ましい場合があります。

AC入力を使用する場合
AC結合を使用した場合、AC結合がハイパスフィルタとして機能し、信号の周波数成分に影響を及ぼすことを念頭におくことが重要です。

図2で示すように、AC結合はDCオフセットを除去するだけでなく、関心のある低周波成分も減衰させる場合があります。AC結合は結果、信号の歪みにつながる場合があります。ハイパスフィルタの影響を説明するため、図3では繰り返し周波数が200 Hzのバイナリ信号を、カットオフ周波数(Fc)35 Hzのハイパスフィルタでフィルタリングする前と後のグラフを示しています。

AC結合のデジタル通信信号では、DCオフセットのないDCバランスのとれた信号を使用することによりこの問題を軽減しています。信号のDCバランスが取れていない場合、一連の信号は高い信号レベルに張り付いてしまう場合があります。これにより、信号が静電フィルタリングの影響を受け、Non-ZeroのDCレベルが生じることがあり、その結果、ビットエラーをもたらされます。

最終更新日:2019年12月4日


Posted Comments:
Stephen Keen  (posted 2023-10-19 09:06:37.853)
Hi We have two of these amps and they work well. As mentioned in other threads the biggest issue is with indication of which gain range your on. We have an automation task that ideally we could electronically switch between gain ranges. Is there anyway of achieving this with the current configuration (at customer risk mods). I would recommend this as a future feature regards
dpossin  (posted 2023-11-03 09:48:33.0)
Dear Stephen, Thank you for your feedback. I would consider that as a special as well. I forward this to our presales team and they will get in contact with you regarding lead time and price ASAP.
Brad Frazer  (posted 2023-06-01 16:03:55.707)
Can the PDA200C be used with an external bias (say ~50V) to enable use with a SiPM device operating in current mode?
dpossin  (posted 2023-06-07 10:03:32.0)
Dear Brad, Thank you for your feedback! The PDA200C unfortunatey can just provide a bias voltage up to 10V.
Chi Wang  (posted 2021-08-19 00:11:35.29)
Hello, we are planning to build a fiber light power monitor. The power range in fiber we want to monitor is between 1nW to 1mW. We plan to use DET01CFC to detect light and then out put to a PDA200C. Then to readout power directly on PDA200C or connect it onto a PDA200C. Is it possible to use these two parts to accomplish this function? Looking forward to your reply!
soswald  (posted 2021-08-23 06:00:34.0)
Dear Chi Wang, thank you for your feedback. In principle the DET01CFC + PDA200C can be used to measure such optical powers. I have reached out to you directly to discuss your application in more detail and look at bandwidth and wavelength requirements.
SEUNGHO LEE  (posted 2021-07-10 10:20:56.427)
Hello, I am thinking that PDA200C will be used together with DET08C which can receive 5GHz photo-signal. Does this PDA200C amplify the fast signal? I am asking this question because I saw, in the section of High-speed Free-space detectors, the photo that inspires DET025A(bandwidth 2GHz) is used with PDA200C. Thanks , SHLee
soswald  (posted 2021-07-13 03:30:34.0)
Dear Seungho Lee, thank you for your feedback. The PDA200C can be used to amplify the signal from detectors like DET025A. Unfortunately the PDA200C does not reach a bandwidth of 2 or even 5 GHz. The maximum small signal bandwidth of the PDA200C is 500 kHz, although this depends on the measurement range. Please see Section 5.1 of the manual for further information. I have contacted you directly to discuss your application in more detail.
Peter Kreuser  (posted 2021-06-28 13:18:12.053)
Hello, how do I find the best amplifier settings for my specific detector?
soswald  (posted 2021-07-05 06:30:15.0)
Dear Peter, thank you for your feedback. The best amplification setting will be highly dependent on the responsitivity of your photodiode and the optical power incident on the detector. We recommend to start at the minimum amplification setting (10 mA measurement range) when connecting a photodiode for the first time and then switching through higher amplification settings until the current is displayed with sufficient resolution on the display. Please see Section 3.2.1 of the manual (https://www.thorlabs.de/drawings/6973049f683fe8db-94298CF0-9F25-D151-C6C4E3066BFB71B2/PDA200C-Manual.pdf) for further information on this topic.
melanie holmes  (posted 2020-02-06 10:51:48.923)
Hi, We have a strong 50 Hz signal when using this device on its two highest gain settings. Is that expected ? The signals we are measuring are modulated at between 100 Hz and 760 Hz so your mains hum filter is not suitable. Can you please suggest a solution ? Thanks !
MKiess  (posted 2020-02-06 10:38:10.0)
This is a response from Michael at Thorlabs. Thank you very much for your inquiry. I have contacted you directly to discuss your complete measurement setup and possible reasons for this signal.
Raymond.Chan  (posted 2019-01-09 09:24:39.903)
Hi, Can you customize the pda200c so that it could measure current up to 100ma? We could accept customization charges. Else could you advice how we can modify it so that it could display up 100ma?
wskopalik  (posted 2019-01-11 03:21:08.0)
This is a response from Wolfgang at Thorlabs. Thank you very much for your feedback! I will contact you directly to see if we can offer a suitable customization. As the PDA200C is designed for photodiodes which usually don't provide that much current, I would like to make sure that it is really suitable for your application.
eli.quinicot  (posted 2018-03-08 06:06:07.61)
Hi I'd like to know if this could be used for measuring low currents from a solar cell. This product would give me an output of voltage right? Thanks
swick  (posted 2018-03-16 04:08:34.0)
This is a response from Sebastian at Thorlabs. Thank you for the inquiry. The measurement principle in PDA200C is based on input resistance to be 0 Ohm. That means the connected sensor needs to deliver only electrical current and no voltage. For photodiodes this is the case but not necessarily for solar cells.
melanie  (posted 2015-02-04 18:21:47.36)
Hi, Thanks for answer about source impedance. Does that mean we should not connect to a DAQ board using a 50 Ohm BNC cable ? If so, what should we use instead ?
shallwig  (posted 2015-03-05 06:58:11.0)
This is a response from Stefan at Thorlabs. Thank you again for your further questions. You are correct, you should not connect the PDA200C to a 50 Ohm BNC cable. If you connect a resistance with less than 10kOhm the internal amplifier is not able to provide the output voltage of 10V. You will get an output error. To use the PDA200C together with your DAQ board you can use a voltage follower circuit. This voltage follower circuit must have an input resistance of 10 kOhm to match the photodiode amplifier requirement, and an output resistance of 50 Ohms to work well with your DAQ board. We have contacted you directly to discuss your application in more detail.
user  (posted 2015-01-31 15:55:52.48)
Please can you tell me the source impedance of the analog output ? I need this number to choose optimum settings for my DAQ board. Thank you.
shallwig  (posted 2015-02-03 07:31:22.0)
This is a response from Stefan at Thorlabs. Thank you very much for your inquiry. The source impedance of the analog output for this device is 10kOhm.
robertmeissner  (posted 2014-11-17 15:46:20.173)
We use a PDA200C. When I turn it on (no Diode connected), it does nothing. I checked fuses (everything alright), tried several cables and plugs, so far to no end. We are using 230V and I specificially changed the fused to 230V. So far, nobody seems to have used it (as the fuse holder was placed to 115V and we only have 230V). Is there any hidden Switch or so that I have to press (of course I tried the button on the front.
shallwig  (posted 2014-11-18 02:32:32.0)
This is a response from Stefan at Thorlabs. Thank you very much for your inquiry. I am sorry for the problems you face with our photodiode amplifier. There is no hidden switch which is supposed to be used to get the device work. Only the line voltage has to be set correctly before using the device first time. I will contact you directly for further troubleshooting.
melanie  (posted 2014-08-14 15:53:13.967)
This feedback is concerning the Benchtop Photodiode Amplifier. Yes it will be useful. However, if the current range could be set remotely, eg over GPIB or USB, then it would be amazing. Please consider this upgrade. I want to use it for automated measurements that are in several stages, between stages I will need to change range and it would be easier to do via computer comms than manually.
shallwig  (posted 2014-08-26 08:16:17.0)
This is a response from Stefan at Thorlabs. Thank you very much for your feedback about the PDA200C. The devices of this series are apart from the display analog devices and do not support digital interfaces. Reason for that is the low processing power of the devices. At the moment it is not planned to upgrade them as this would lead to a complete redesign of the device but I forwarded your ideas to our engineers. I will contact you directly to discuss your application in detail.
tschalk  (posted 2012-12-06 03:17:00.0)
This is a response from Thomas at Thorlabs. Thank you very much for your inquiry. The PDA200C is immediately ready to use after turning on the device. It makes no difference if you connect the photodiode before or after turning on the amplifier and it is independent of using a bias voltage. If you have to turn the device off and on again for getting a measurement indicates that something is wrong with the connection or with the device itself. I will contact you directly to discuss this issue. Best Regards, Thomas
sal.leap  (posted 2012-12-03 13:47:32.817)
I have a few PDA 200C that I have to recycle the power to the unit to get power readings from a FDG-50 large area detector. I have an external power source aimed at the LAD but the PDA 200C does not display any power. But when I recycle the power to the amplifier it shows detected power. Regards, Sal (Process Engineer, Molex)
tcohen  (posted 2012-05-23 11:28:00.0)
Response from Tim at Thorlabs: Thank you for sharing your ideas! Because these changes cannot be directly integrated into the current model, these suggestions would involve a full redesign of the PDA200C. Currently, our engineers are fully engaged in the development of new products, but based on your suggestions we have opened a discussion so that we may start the development of this as a future project and offer these features in a PDA200C successor.
acable  (posted 2012-05-22 10:00:54.0)
It would be great to have an indicator that tells the user what gain step the PDA200C is set to, when making a complex series of measurements that require changes in gain this feature would be really welcome. The current design uses 3 LEDs with 2 steps per LED which is difficult in a real world application to track. Smaller point, a number of your SI photodiodes are spec'd at 20V bias but the PDA200 only goes to 10V, i am assuming you would spec your diodes at their optimal bias hence i feel that i am not getting the best possible performance from my setup. Please consider increasing the bias to 20 V. Sincerely grateful for your attention!
tcohen  (posted 2012-05-15 10:17:00.0)
Response from Tim at Thorlabs: Thank you for contacting us. The “Err06” error message indicates a malfunction of the PCB in the device and we will need to take it in to repair. We will contact you with information and instructions.
jjwang  (posted 2012-05-15 13:50:11.0)
Dear Sir/Madam, We had a problem with PDA200C and it reports "Err06". Would you please provide us the solution to sort out this problem. Best Regards, Dr Jing Jing Wang Centre for Research on Adaptive Nanostructures and Nanodevices Trinity College Dublin Dublin 2 Ireland Telephone: 0035318964633 (Office) 0035318964617 (Photonics Laboratory) Email: jjwang@tcd.ie
julien  (posted 2010-04-22 09:44:53.0)
A response from Julien at Thorlabs: "Err06" is displayed on the unit when an electronic problem occurs on the PCB leading to a malfunction of the PDA200C. The unit thus needs to be sent to us for repair. For errors not listed, the manual recommend to contact directly tech support, since those errors cannot be fixed by the user. I will contact you directly to initiate the return procedure.
davepatterson99  (posted 2010-04-21 12:22:52.0)
I have a PDA 200 C. When I turn it on (no diode connected) it says "Err06". Your manual says nothing about "Err06". This is terrible! The unit is quite new (about one year). Please send me the real manual?

トランスインピーダンスアンプセレクションガイド

Representative
Photoa
Item #Zero
Offset
PD Bias
Voltage
Bandwidth
(3 dB)
Transimpedance
Gain
Max Input
Current
Max Output
Voltage
Max PD
Capacitanceb
Power
Supply
MassDimensions
Fixed Gain, Compact
AMP110Check-1 kHz107 V/A±200 nA±2 V10 nFUSB,
5 V @ 2 A
80 g97 mm x 32 mm x 25.4 mm
AMP120Check-100 kHz105 V/A±20 µA±2 V10 nF
AMP130Check-100 kHz103 V/A±2 mA±2 V10 nF
AMP140-Check10 MHz104 V/A±350 µA±3.5 Vc200 pF96 mm x 32 mm x 25.4 mm
Switchable Gain, Compact
AMP100Check-1 kHz106 V/A±2 µA±2 V10 nFUSB,
5 V @ 2 A
80 g97 mm x 32 mm x 25.4 mm
107 V/A±200 nA
108 V/A±20 nA
AMP102Check-100 kHz103 V/A±2 mA±2 V10 nF
104 V/A±200 µA
105 V/A±20 µA
Switchable Gain, Benchtop with 5-Digit LED Display
PDA200CCheckCheck1 kHz108 V/A+100 nA±10 Vd10 nF100 V, 115 V,
or 230 V
(50/60 Hz)
<3 kg320 mm x 146 mm x 77 mm
5 kHz107 V/A+1 µA
20 kHz106 V/A+10 µA
70 kHz105 V/A+100 µA
250 kHz104 V/A+1 mA
500 kHz103 V/A+10 mA
  • Click to Enlarge
  • 周波数補償された動作をさせるうえで、フォトダイオードの静電容量として許容される最大値
  • バイアス電圧: +1.5 V~+15 V (CG)、-1.5 V ~-15 V (AG)
  • 出力電圧範囲: 0~+10 V (CG)、0~-10 V (AG)。バイアス調整: 0 V~-10 V (CG)、0 V~+10 V (AG)
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ベンチトップ型フォトダイオード増幅器

Key Specificationsa
Full Scale Current Measurement Ranges100 nA to 10 mA (in Decade Steps)
Maximum Resolution10 pA
Bias Voltage0 to -10 V (CG)
0 to +10 V (AG)
Noise≤0.02%b
Analog PD Current Output BandwidthDC to 500 kHzc
Analog PD Current Output Conversion Coefficient103 V/A to 108 V/Ac
  • 詳細については、「仕様」タブをご参照ください。
  • RMS、上記のFull Scale Current Measurement Rangeにおいて
  • 測定範囲に依存します。詳細は「仕様」タブをご覧ください。
  • トランスインピーダンス光電流増幅器
  • 全ダイナミックレンジに渡り低ノイズ動作
  • シングルポイントパワー校正に対応

フォトダイオード増幅器PDA200Cは、非常に小さなフォトダイオード電流を超低ノイズで増幅する際にご使用いただけます。100 nA~10 mAのフルスケールにおいて6種類の電流範囲をご用意しています。最高表示分解能は10 pAです。ユニットは、カソード接地(CG)およびアノード接地(AG)のフォトダイオードに対応します。こちらの増幅器は光電池(フォトボルタイック)モードまたは光伝導(フォトコンダクティブ)モードのどちらかで動作が可能です。調整可能なバイアス電圧入力により、応答の線形性が改善し、周波数応答性が上がります。こちらのフォトダイオード増幅器は、当社のマウント付きフォトダイオードやバイアスフォトディテクタすべてに対応します。

+1 数量 資料 型番 - ユニバーサル規格 定価(税抜) 出荷予定日
PDA200C Support Documentation
PDA200Cフォトダイオード増幅器、ベンチトップ型
¥143,135
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Recalibration Service for the Benchtop Photodiode Amplifier

Thorlabs offers a recalibration service for the PDA200C Benchtop Photodiode Amplifier. To ensure accurate measurements, we recommend recalibrating this device every 24 months.

Requesting a Calibration
Thorlabs provides two options for requesting a calibration:

  1. Complete the Returns Material Authorization (RMA) form. When completing the RMA form, please enter your name, contact information, the Part #, and the Serial # of the item being returned for calibration; in the Reason for Return field, select "I would like an item to be calibrated." All other fields are optional. Once the form has been submitted, a member of our RMA team will reach out to provide an RMA Number, return instructions, and to verify billing and payment information.
  2. Enter the Part # and Serial # of the item that requires recalbration below and then Add to Cart. A member of our RMA team will reach out to coordinate return of the item for calibration. Should you have other items in your cart, note that the calibration request will be split off from your order for RMA processing.

Please Note: To ensure your item being returned for calibration is routed appropriately once it arrives at our facility, please do not ship it prior to being provided an RMA Number and return instructions by a member of our team.

+1 数量 資料 型番 - ユニバーサル規格 定価(税抜) 出荷予定日
CAL-PDA200C Support Documentation
CAL-PDA200CRecalibration Service for PDA200C Benchtop Photodiode Amplifier
Part Number:  Serial Number:
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