- ページ 14

送信機 AMC 210 SeriesのPDF 取扱説明書をオンラインで閲覧またはダウンロードできます。AMC 210 Series 19 ページ。 Transmitter with external electrochemical sensor

AMC-210 Transmitter with external electrochemical sensor

5 OPERATION AND CALIBRATION

The AMC-210 series sensor/transmitter is factory calibrated for the gas listed in Product

Information (section 2) at the beginning of this manual. The sensor/transmitter should not need

re-calibration when first installed and powered up, but a test for correct operation is

recommended after a stabilization period of 10 minutes.

Following stabilization, the sensor/transmitter should be sending (in a Zero Gas environment) a

4 mA signal to the monitor or controller. However, there are a few situations where a slightly

higher or lower than normal signal may be noticed. In many facilities there can be residual

levels of the gas being detected in the air at all times. These can cause a minor response from

the sensor expressed as a rise in signal. Other causes for minor signal variations include

extremes in temperature. The application of a clean air sample will verify if the elevated signal

is from background gas or equipment error.

Although the electrochemical sensors are very selective, there are some interference gases,

which can also cause a response from the sensor. These gases are listed on the detailed

Specifications sheet pertaining to the sensor in use.

The transmitter is equipped with a remote calibration feature allowing one-man calibration at the

sensor/transmitter location. The transmitter output is measured using a plug-in type "Remote

Calibration Lead" (P/N 2900-01) designed to be adaptable to most multimeters. Zero and Span

adjustments are made at the transmitter. Recalibration is necessary when replacing the sensor.

Verification of calibration should be done at least once every 6 months. For safety reasons and

highly demanding applications, monthly verification is recommended.

Factory/on-site calibration services, customer training and/or calibration adapter are available.

Specify the sensor/transmitter Part Number & Serial Number listed in section 2.1

SENSOR/TRANSMITTER and refer to section 2.2 FACTORY CALIBRATION for Gas Type and

calibration adapter when ordering any of the above.

Caution:

- Only qualified personnel should perform the actual calibration.

- Users are advised to consult The Armstrong Monitoring Corporation as to the

calibration procedure and recommended gas concentration for the application.

For some exotic gases, calibration standards needed for field calibration are not readily

available. The Armstrong Monitoring Corporation offers the following options:

1. Pre-calibrated sensor/transmitters to replace expired units.

2. Factory installation and calibration of new sensors in returned transmitters.

3. Replacement sensors supplied with a pre-calibrated electrical output.

For all above options, please contact the factory for details.