User Guide

Model 3i Digital Force/Torque Indicator User’s Guide

Selection

Description

Numeric + Units

Output format includes the value and unit of measure. Compression/clockwise

values have positive polarity, tension/counter-clockwise values have negative

polarity.

Numeric Only

Output format includes the value only. Polarity same as above.

Invert Polarity

Compression/clockwise values have negative polarity, tension/counter-clockwise

values have positive polarity. May be selected in addition to the Numeric + Units /

Numeric Only selection.

Omit Polarity

Both directions are formatted with positive polarity. May be selected in addition to

the Numeric + Units / Numeric Only selection.

9.2 Data Output

Communication with the 3i is achieved through the micro USB port located along the left side of the

housing, as shown in the illustration in the Power section. Communication is possible only when the

indicator is in the main operating screen (i.e. not in a menu or configuration area).

The current reading is transmitted from the indicator when the DATA key is pressed. The 3i may also be

controlled by an external device through the USB channel by sending ASCII command ‘?’ (no quotes).

The command must be terminated by a CR (Carriage Return) character, 0x0D, or a CR-LF (Carriage

Return – Line Feed) pair, where the Line Feed, 0x0A, is ignored.

9.3 Command Responses

In response to the reading request command ‘?’ the indicator will return a string with the load data,

followed by a space, then the load unit (if enabled under the USB Settings → Data format sub-menu). It

will be terminated by a CR-LF pair.

Example return strings:

-18.78 lbFin<CR><LF> 18.78 lbFin of counter-clockwise torque

1.724 N<CR><LF> 1.724 N of compression force

The number of digits after the decimal point is dependent of the sensor’s capacity and resolution.

Polarity may be inverted or omitted, as shown in the table above.

Any detected errors are reported back by means of error code *10 (illegal command).

The 3i can send individual data points or continuous data to MESUR

gauge and MESUR

Lite software.

DATA FORMAT

* Numeric + Units

Numeric Only

Invert Polarity

Omit Polarity