Parameter alarms configured on the iSIC data logger allow users to setup and configure controls to do things such as flash warning lights, trigger ISCO samplers, etc. The iSIC allows two kinds of control, 3.3V digital I/O and 12V 100mA switches. These can be accessed via the Setup Device Wizard in iChart. This may be […]
The following information is only for customers who have V6 circuit boards. MS8 Connector Wiring On the outside of the iSIC enclosure is an MS8 connector which is used for sensor wiring. This connector allows for quick connection for instruments such as YSI Sondes, which has a mating MS8 connector at the end of its […]
Digital I/O uses a voltage signal to represent either a one or a zero. A “0” typically ranges from 0 volts to 0.8 volts while a “1” will range from 2.4 volts to 5 volts. These ranges are defined in the TTL (Transistor-Transistor Logic) specification. Environmental data loggers can use digital I/O ports for […]
When testing a pulse counter functionality, it is sometimes required to view and reset the current number of “tips” on the pulse counter. For example, with tipping bucket rain gauges, the best method to ensure accuracy is to pour x amount of water through the bucket to make sure it records x number of tips […]
A tipping bucket rain gauge can be connected to the iSIC through the digital terminal strip. Follow the connection diagram below to properly connect a rain gauge. One rain gauge may be connected to the iSIC at a time. REV: 13G02
A thermistor can be connected to the iSIC through the analog terminal strip. Follow the connection diagram below to properly connect a thermistor. The iSIC utilizes the Steinhart-Hart equation for calculating temperature. A single resistor across AGND and the analog input pin should be used to complete the equation. The resistor size should be […]
In iChart, go to the Advanced | iSIC | iSIC menu. The iSIC Setup dialog box will open: The first screen gives the iSIC connection options. Enter the COM port and connection method of the desired iSIC as well as the iSIC Address. For example, if trying to connect to a 2100-iSIC with […]
Single-Ended (Non-Isolated) 4-20mA Sensors Connect single-ended 4-20 mA sensors to the internal analog terminal strip. A diagram of this is shown below: Pins AD0 through AD7 can all be used for connecting 4-20 mA sensors. Eight 4-20 mA sensors can be connected at the same time using these pins on the analog terminal strip. […]
Environmental measurements can be determined by reading a simple voltage output from a sensor. The voltage level is proportional to the measurement parameter. Every NexSens iSIC ships standard with (8) analog channels. (8) additional analog channels can be added with a factory installed analog expansion. The iSIC can measure voltages up to 2.5V (i.e. 0-1V, […]
If an SDI-12 sensor reading shows -99999.99 or -100000 in iChart, it indicates that there is a communication problem between the data logger and the SDI-12 sensor. In this situation, there are several possibilities: 1. Insufficient power supply 2. Loose wiring between the logger and sensor 3. The data logger SDI-12 interface is not functioning […]
