Справочник Пользователя для SSI America 8040

 

Super Systems Inc. 

Page 7                      SDS Data Logger Manual #4565 Rev D 

When logging data, the operator will use the on-board display to start and stop the data logging / survey 

process.  The first steps related to data logging are connecting the inputs to the terminal strips on the 
data logger.  Each terminal strip represents a single analog board with 5 inputs.  You can remove these 

terminal strips by pulling up on both ends of the terminal strip.  

Depending on the model number, you have either 20 or 40 input channels for data logging.  For each 

channel there will be a positive and negative connection which must be attached to the appropriate input. 

The operator defines an input type for each channel.  This is performed through menu option 8 (

Modify 

Input Settings

) on the data logger.   

Once the inputs have been connected, the operator 

selects which inputs will be included in the survey.  

This is done in 2 ways.  The template provides 

operators with input selection but can be updated on 

the data logger using the 

Select Input Channel

 option.  

When a template has been selected, the input 
channels setup for the template, as defined in the 

Template Manager, will be the selected channels for 

the survey.  As mentioned, this can be updated using menu option 7 

Select Input Channel

.  Always 

select a template prior to running a survey.  If you want to create new templates, please see 

section 

SDS Template Manager

. 

The Super Systems, Inc. 31541 Analog Board contains a group of five channels isolated from the main 

DC power source. The board can be connected to thermocouples, voltage sources from 20mV full scale to 

1.28 Volts full scale, or 4 – 20 mA current loops. 

Thermocouple wires can be connected directly to the terminal blocks. The thermocouple junctions should 

not be grounded. If they do touch a ground reference, all thermocouples on a board must have a 
common ground reference. If multiple thermocouples are connected to different ground reference points, 

the accuracy of all thermocouples on the board cannot be guaranteed to be accurate. 

Voltages from 0 mV to 1.28 Volts can be directly connected to the terminal blocks. When measuring 
ground-referenced voltages, all references must share a common ground reference. If the voltage 

sources are connected to different ground reference points, the accuracy of all the voltage sources 

connected to the board need to be checked for accuracy. 

Before connecting the current loop, insert the shorting jumper on the board for each channel used to 

measure current loops. This jumper inserts the 62-ohm shunt resistor across the input of the A/D. If 

multiple current loops are connected to one board, all must share the same power supply and ground 

reference points or the accuracy of all the current loops need to be checked for accuracy.