21X Micrologger®

データロガー / 21X

RETIRED ›
This product is no longer available and has been replaced by: CR3000.

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修理	非対応
キャリブレーション	非対応
フリーサポート	非対応

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詳細
仕様
互換性
ドキュメント
よくある質問
ケーススタディ

概要

The 21X Micrologger featured a self-contained package that had an integrated power supply, keyboard, and display. Its on-board power supply contained alkaline batteries.

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詳細

The 21X Micrologger featured a self-contained package that had an integrated power supply, keyboard, and display. Its on-board power supply contained alkaline batteries.

The 21X provided 8 differential (16 single-ended) analog input channels, 4 switched excitation outputs, 2 continuous analog outputs, 6 control ports, and 4 pulse counting channels. It had a CS I/O port that was labeled Serial I/O; an SC32A or SC32B was required for communications with a PC. The 21X stored up to 19,296 data points in its internal memory.

Internal software PROMs (Firmware), ac rejection, and temperature testing were ordered at time of purchase. The 21X needed three PROMs for any Windows software to communicate with it. Two PROMs had only three *B windows; three PROMS had nine *B windows. For descriptions of PROMs, see Ordering Info.

仕様

-NOTE-	Note: Additional specifications are listed in the 21X Specifications Sheet.
Analog Input Channels	8 differential (16 single-ended)
Switched Excitation Outputs	4
Continuous Analog Outputs	2
Control Ports	6
Pulse Count Channels	4
Memory	Stores 19,296 data points in internal memory.

互換性

A typical field-based 21X system consisted of:

• 21X Micrologger
• Weatherproof Enclosure
• Communications Peripheral(s)
• Programming and Communications Software
• Sensors

ドキュメント

カタログ

マニュアル

テクニカルペーパー

21X PROM Replacement Procedure (App. Note Code: 1D-J)

よくある質問

21Xに関するよくある質問の数： 6

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When dialing up the 21X, the barometric pressure data is displayed in real time. When the data is collected via either dial-up or a storage module, the barometric data are all zeros. Why does this happen?

It may be that there is no output flag set to dump data to final storage. It is possible that access is not being made to the right input location of the barometric pressure sensor to send it to final storage. To set an output flag, refer to the "Program Control Instructions" section in the 21X Micrologger Operator's Manual.
If the 21X was turned off before the data was downloaded using PC208W, what can be done?

After the power to the 21X is turned off, the program, final storage data, and clock settings are lost. There is no battery-backup RAM or Clock in the 21X.
What is the voltage output range for the 21X?

The voltage ranges are software selectable for any channel, and full scale range is ±0 to 5 V. Refer to the "Input/Output Instructions" section for the input voltage ranges in the 21X Micrologger Operator's Manual.
Do the 21X dataloggers have a built-in security code that might be activated under certain conditions when upgrading the program?
There is no built-in security code in the 21X. A security code can be set in one of two ways in the 21X:
- Enter a security code using *C and a four-digit number.
- Enter a security code in Edlog. Under Options, enter a four-digit security code into the program.
For more information on security, refer to Page 1-6 of the 21X Operator's Manual.
What happens to a 21X program when the batteries fail?

Whenever power is lost to the 21X, the program, clock, and final storage data are lost. Using our data logger support software, the program can be written and reloaded to the 21X.

Campbell Scientific recommends keeping a backup to the program that includes a software and hard copy, as well as a backup wiring diagram of the sensors.
データロガーに同時に接続できる AM16/32B マルチプレクサの数はいくつですか?

実用的な最大値は、データロガーの 2 つのCターミナルごとに 1 つのマルチプレクサを接続することです。Cターミナルをマルチプレクサ間で共有して、接続するマルチプレクサの数を増やすことができます。ただし、ターミナルを共有するには、より複雑な配線とプログラミングが必要です。2 つのCターミナルごとに 1 つ以上のマルチプレクサを接続したいユーザーは、Campbell Scientific の営業またはサポートエンジニアに問い合わせて支援を受けることをお勧めします。

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ケーススタディ

南極: ドライバレーの生態系
全米科学財団が後援する長期生態学研究 (LTER) プログラムは、さまざまな環境における生態学的現象を監視します。このプログラムは、地球上で最も過酷な砂漠の 1 つであるマクマードドライバレーにある最新のサイトを含む、北米の 16 か所と南極の 2 か所のサイトをサポートしています。ロバートウォートンジュニア博士 (DRI) が率いるマクマード......続きを読む

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