MK Products MK Cobramatic Pro Series - Manual (Page 20)

Cobramatic ® Pro Series Owner’s Manual - Page 13
JP1: Post-Purge Settings & Adjustments
The Post-Purge Jumper/Pot Configuration at JP1 has 2 available settings: 2 sec. fixed and variable
from 0-5 seconds.
By default, the two-pin jumper across the top-and-middle pins, is configured for 2 sec. Just to the
left of the jumper is a ¾-turn pot, P1, which is used with the variable setting. For the 0-5 second
range, move the jumper from the top-and-middle to the middle-and-bottom pins (Shown above).
Timing adjustment for the variable settings are as follows: Move the jumpers to variable setting
location. Turn potentiometer screw (Small flat or cross-head) half way. Upon release of gun
trigger, count time between yellow Gas Solenoid LED (L1) and green Trigger LED (L3). Adjust as
necessary.
JP2: Pre-Purge Settings & Adjustments
The Pre-Purge Jumper/Pot Configuration at JP2 has 3 available settings: 0.25 sec. fixed, variable
from 0-1 sec. or variable from 0-5 seconds.
By default, the twin two-pin jumpers, across rows 1 & 3, are configured for 0.25 sec. Just to the left
of the jumpers is a ¾-turn potentiometer (pot) P2, which is used with both variable settings. For the
0-1 sec. range, move the jumpers across rows 3 & 5. For the 0-5 second range, move the jumpers
across rows 5 & 7 (Shown above).
Timing adjustment for the variable settings are as follows: Move the jumpers to either variable
setting location. Turn potentiometer screw (Small flat or cross-head) half way. Pull gun trigger and
count time between red contactor wire feed LED (L2) and yellow Gas Solenoid LED (L1). Adjust pot
screw as necessary.
JP3: Gas/Purge Jumper
Changing the position of the JP3 jumper changes the configuration of the pre & postpurge
sequences. Refer to Figure 5 for the desired pre and postpurge sequence. Once the desired
sequence is selected, relocate on JP3 jumper from its horizontal default pattern (top right) to its new
vertical sequence positurn.
Main PC Board: Jumper Functions
Rows 1 & 3: 0.25 sec. fixed Rows 3 & 5: 0-1 sec. Rows 5 & 7: 0-5 sec.
Middle/Bottom: 0-5 sec. Top/Middle: 2 sec fixed