Remote Sensor Manual. User Guide. Revision A.0

Transcription

1 Remote Sensor Manual User Guide Revision A.0

2 Contents Remote Sensor User Manual... 3 Connecting Power... 3 Basic Sensor Operation... 4 Basic Sensor Operation with Data Logging... 5 Sensor Calibration Button... 6 Sensor Access Website Login... 6 Remote Sensor User Manual 2

3 Remote Sensor User Manual Thank you for purchasing an ABM cellular enabled remote sensor unit. Your sensor will automatically connect to the Sensor Access system updating the system with measurements and downloading any new configuration changes you may have added. This guide will help you understand the operation of your remote sensor unit. Connecting Power Your sensor is designed for low power operations. The sensor requires an input voltage between 6 and 30 volts DC. Connect your power supply directly to the sensor power terminals as illustrated in Figure 1. Do not add any resistors between the sensor and the power supply. Your remote sensor is fully digital and does not provide any loop current signaling. Important Do not use a resistor Load Resistor X250 Ohm 1/4 Watt Input: 6 to 30 VDC Your remote sensor is completely digital. It does not provide a 4mA to 20mA signal. + - Do not add a resistor to power source lines + - ABM Remote Sensor Sensor Housing 6 to 30 VDC connection + - Wiring Terminal Strip Please Note: Power supply wires must be connected to the terminal strip only. Connecting the positive or negative wire to the sensors housing will damage the sensor. Figure 1 Connect your power supply directly to the sensor. Do not use any resistors. Remote Sensor User Manual 3

4 Basic Sensor Operation Your remote sensor is designed to operate from a battery for long period of time. To achieve this goal the sensor spends most of its time in a deep sleep low power mode. Figure 2 shows the basic operation of the sensor from power on to deep sleep mode. To save power the sensor LED will blink green for 1.5 seconds when the sensor is initially powered on. You will notice that the sensor wakes up after a number of minutes, takes a measurement, sends that measurement to the server and then returns to sleep. This cycle is continuously repeated unless you add data logging (see data logging). Power Sensor On Blink LED Green Take Measurement Power Cellular Modem On Connect To 30 Seconds Minimum Send Data Disconnect From Wake Up Exit Low Power Mode Power Down Modem Put Sensor in Deep Sleep Low Power Mode Sleep for a minimum of 2 minutes The sleep time can be changed on the Sensor Access. How long the sensor sleeps between measurements is referred to as Time Between Measurements. Figure 2 Basic sensor operation. Remote Sensor User Manual 4

5 Basic Sensor Operation with Data Logging Your sensor has been designed to operate for long periods off of a battery. The largest power consumption occurs when the cellular modem is powered on and communicating with the Sensor. Using data logging combined with the Time Between Measurements setting (sleep time) you can control how often the cellular modem connects to the Sensor. Your sensor can be configured to log up to 300 measurements before powering on the cellular modem and connecting to the Sensor. This will extend the battery life while still providing frequent measurements. When data logging is enabled the basic sensors operation changes. Each time the sensor wakes up it takes a measurement and logs the data to memory. It must then determine if it should go back to sleep or power up the cellular modem and connect to the server. This is illustrated in Figure 3. Power Sensor On Blink LED Green Take Measurement Save Measurement to Data Log. No User requested more measurements be logged. Connect to server? Yes - User requested measurements Logged. Power Cellular Modem On Connect To 30 Seconds Minimum Send Data Put Sensor in Deep Sleep Low Power Mode Disconnect From Power Down Modem Wake Up Exit Low Power Mode Sleep for a minimum of 2 minutes The sleep time can be changed on the Sensor Access. How long the sensor sleeps between measurements is referred to as Time Between Measurements. Figure 3 Basic sensor operation with data logging enabled. Remote Sensor User Manual 5

6 Sensor Calibration Button Your sensor is equipped with a calibration button that can be used to calibrate the sensor s range. For remote locations the button should be disabled to prevent tampering. To access the calibration button on the sensor remove the sensors lid by unscrewing it. To make calibration changes to the sensor using the button, power must be supplied to the sensor and the button must be pressed for time specified in Table 1. Press the button until the LED turns the desired color and then release the button. Table 1 Calibration Button Button Timing of the Remote Ultrasonic Sensor. Seconds Pressed LED Color Description < 2 Off If the button is pressed for less than 2 seconds it is ignored and no action is taken. > 2 Green Take a measurement and connect to the server now. > 7 Yellow Program the full tank distance equal to the current distance. > 12 Red Program the empty tank distance equal to the current distance. > 17 Off Button pressed for greater than 17 seconds is ignored and no action is taken Where: < means less than and > means greater than. Sensor Access Website Login The measurements from your remote sensor are automatically sent and stored on the Sensor. To view these measurements or change your sensor s settings you need to create and account and login to the Sensor Access Website. The Sensor Access Website login screen is shown in Figure 4. For additional information on how to use the Sensor Access Website download the Sensor Access User Guide (see link at the bottom of the login page) or refer to the online documentation included on each web page. Figure 4 The Sensor Access login page provides access to the Sensor Access system. To access the Sensor Access Website click here. Remote Sensor User Manual 6