User guide
Model 3i Digital Force/Torque Indicator    User’s Guide 
5
The indicator can be configured to automatically power off following a period of inactivity. Refer to the 
Other Settings section for details. 
If battery replacement is necessary, the battery may be accessed by loosening the two captive screws in 
the rear half of the housing and separating the two halves of the housing. 
3 MECHANICAL SETUP 
3.1 Connecting a sensor 
The Plug & Test
TM
 connector must be inserted into the receptacle of the 3i or 5i indicator with the side 
marked “Plug & Test
TM
 Technology” facing up (see Fig. 3.1). When fully inserted, the connector will lock 
into place with a “click”. 
Fig. 3.1 
Appropriate orientation of Plug & Test
TM
 connector. 
Sensor model number, serial number, and load 
capacity information may be found on the labels 
affixed to the connector. 
To release the connector, press both buttons on either side of the indicator housing to release the sensor 
(see Fig. 3.2). Pull the connector completely out of the indicator by holding the curved aluminum section. 
DO NOT pull on the cable or strain relief. 
Fig. 3.2 
Press both buttons on either side of the indicator 
housing to release the Plug & Test
TM
 connector. 
3.2 Mounting to a plate 
The 3i can be mounted to a plate with four thumb screws fastened into the appropriate holes in the rear 
half of the housing. Refer to the Dimensions section for detailed hole information and locations. 










