Tweco 160 TS Arcmaster - Manual (Page 47)

ARCMASTER ® 160TS
March 31, 2006 10-3
d) Turning the VRD ON/OFF (see Figure 13).
• To turn VRD ON: rote the trim potentiometer (VR1) on the display PCB fully clockwise.
• When VRD is turned ON check that it operates as per VRD Specifi cations on page 5-13.
• To turn VRD OFF: rote the trim potentiometer (VR1) on the display PCB fully counter
• clockwise.
!
WARNING
The VRD ON/OFF trim potentiometer MUST ONLY be positioned fully clockwise OR fully counter clockwise as the
VRD function will be unknown for every other position.
Figure 13 VRD ON/OFF Step D