Cellwatch Frontier - Page 49

Cellwatch Frontier System Installation & User Manual
Section I – Installation Guide-49
Once the top section of the clip comes into contact with the top of the post, release the tension and pull
the screwdriver(s) away.
To remove a clip, use a similar process but in reverse. Hook one side with a screwdriver and carefully
pry and lift removing as little battery grease from the terminal as possible. Once the clip has cleared the
top of the battery post, it is then OK to grab the clip by the tabs or continue lifting the clip away from
the terminal with the screwdriver.
DCM 6-L with an Odd Numbered String
The DCM6-L is capable of being powered off two 2-volt jars. When monitoring straps separate from
cells using these units, the need to extend power leads across four 2-volt jars is eliminated. When
measuring a string with an odd number of cells using the DCM6-L, special consideration is needed for
the one remaining cell. The DCM6-L measuring the single cell should be powered by an external 5v
power supply (rather than being powered off the cell). The cell would be monitored using channel one
(between red and orange leads) with the brown and white power leads wired back to the external
power supply.
Example DCM6-L wiring for measuring straps and cells separately
DCM6-R
The DCM6-R measures string ripple and string voltage. It is usually connected as the last DCM on the
fiber optic loop. Mount the DCM6-R on a jar or DIN-rail near the Frontier cabinet. Ensure the cabinet
fuse is open so no power is supplied to the system. Then connect the brown lead to the positive side of
the cabinet fuse and the white lead to the negative side of the cabinet fuse. Close the fuse to power the
system back up.
The DCM5 & DCM6-H measure ripple voltage across the DCM power supply between the white and
brown wires. The ripple voltage measured by each DCM is then summed to give the string ripple
voltage. The DCM6-L was designed specifically for 2-volts cells and does not measure ripple. In systems
using 2-volt cells we supply the DCM6-R to measure string ripple by connecting directly across the entire
string.