Emerson MA N-00 05-00, UT-P+-STXXXX Operation, Periodic Response Check, Operator Interface

Periodic Response Check

We recommend that the toxic gas detector be verified or calibrated every 3 months.

A typical response check involves the application of calibration gas to the sensor, then the observation of the response LEDs, analog output, display and external monitoring equipment. Be sure to prevent unwanted response of external monitoring devices and equipment during this procedure. If the UNI-TRAN Premium Plus response to calibration gas is within its specified accuracy then it is not necessary to perform a calibration. For example, when 50% of full scale is applied, the response is expected to be between 11.5mA (47% of full scale) and 12.5mA (53% of full scale). An additional consideration is the accuracy tolerance of the calibration gas which may be + or - a few percent. If the calibration gas is + or - 10% of full scale then the reading may be from 10.7mA (42% of full scale) to 13.3mA (58% of full scale).

Your system is now operational. For further information please review the following chapters.

Chapter 4 Operation

Chapter 5 Troubleshooting

Chapter 6 Glossary of Terms

Chapter 4 Operation

Operator Interface

Main Menu

The main menu of the Toxic Detector has three options that allow you to adjust (programming) or view its system parameters :

<Calibrate Sensor

<Set Relay Options

<Review Settings

In order to enter the main menu of the detector place the curved side of the magnet on the side of the enclosure at the 10 o’clock position (see Figure 15) where marked to actuate the magnetic reed switch or press the Cal/Reset switch. Release the magnetic reed switch or Cal/Reset switch after the timer has finished counting down from 10 to 0. In the main menu, the options are displayed and prompted for selection by displaying “YES?”. Momentarily activate the magnetic reed switch or Cal/Reset switch when the desired option is prompted for selection. If the magnetic reed switch or Cal/Reset switch is not activated the Toxic Detector will scroll to the next option. When a selection has been made the selection is acknowledged with a flashing “YES”. If none of the three options are selected, the Toxic Detector returns to the normal operation mode.

Figure 16 - Magnetic Reed Switch

Activation

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