Emerson Liqui-tect MC68HC16Z1 - Manual (Page 37)

System and Control Options
33
6.7 Setup System - Setup Mapmode
Mapping involves measuring the exact location of various points along the leak detection cable. This
greatly simplifies the use of the Liqui-tect Monitoring System to quickly pinpoint the location of a leak.
The Liqui-tect Monitoring System determines the location of a leak by computing its distance along the
leak detection cable. By setting off alarms with a damp paper towel or sponge and marking each reading
on a map of the floor, you can define various points along the cable for later reference in finding a leak.
Up to 254 points can be mapped.
After the leak detection cable has been laid and properly connected, as described in 3.1 - Connecting
Leak Detection Cable Inputs, follow these steps to map the system:
1. Draw a floor plan that shows the routing of the leak detection cable, including any jumpers used
(non-sensing cable).
2. Using the LCD on the front panel of the Liqui-tect Monitoring System:
Log In and Choose Setup System
a. From the Main Menu, use the arrows
↑↓ to choose System and
Control, then press Enter ↵ (see 6.1 - Login for help) .
b. Enter your password at the Login screen.
c. From the System and Control Menu, use the arrows
↑↓ to
choose Setup System, then press Enter ↵ .
Select Setup Mapmode
d. From the Setup System Menu, shown at right, use the
arrows ↑↓ to choose Setup Mapmode and press Enter ↵ .
e. Use the following instructions to set up the mapping of each zone.
Set Up Mapping for Zone 1 or Zone 2
f. Use the arrows
↑↓ to choose a zone—either ZN1 Zone 1 or
ZN2 Zone 2—from the Select Zone to Map Menu, and press
Enter ↵ .
The Liqui-tect Monitoring System is now ready for you to short the
cable, as described in steps 3 through 6.
3. Select the first point to be mapped and mark it on the floor map as
point “X” (where X represents 1 for the first point, 2 for the second,
and so on, up to 254). Determine the exact location of the point by
measuring the distance from the panel to the point or otherwise
describing its location (for example, “at front of chiller”).
4. Wrap a damp paper towel or sponge around the selected point on
the cable to cause a short in the cable and trigger an alarm.
5. After about 30 seconds, the Liqui-tect panel annunciates a short beep. The LCD displays the
computed distance to the leak.
6. Remove the paper towel and dry the cable. In approximately 20 seconds, the Liqui-tect panel
annunciates a long beep indicating the short has been removed.
7. Go to the next point and repeat this process (steps 3 through 6) until the entire cable has been
mapped. Up to 254 points can be mapped.
When complete, press the ESC key on the LCD to exit mapping mode and return to the previous screen.
Table 11 shows the default mapping settings for each zone.
NOTE
You must perform the automatic calibration steps in 6.3.4 - Auto Calibration before mapping
can commence. The leak detection cable is 12 in. (30.48cm) to 18 in. (45.72cm) longer than the
nominal length, which allows a service loop should the cable need to be replaced. Automatic
calibration enables the Liqui-tect system to determine the cable’s exact length.
Table 11 Default mapping values
Option Default setting
Current 0UA, where UA represents µA or microAmps
Distance (none)
Setup System Menu
SETUP ZN1 ZONE 1
SETUP ZN2 ZONE 2
SETUP ALARM OUTPUTS
↑↓
=NEXT
↵
=SELECT
SETUP REALARM DELAY
> SETUP MAPMODE
SETUP SYSTEM INFO
Select Zone to Map
SELECT ZONE TO MAP
> ZN1 ZONE 1
ZN2 ZONE 2
↑↓
=NEXT
↵
=SELECT
VIEW LAST MAP
Mapping Options
MAPPING ZN1 ZONE 1
CURRENT:
0UA
DISTANCE: ----
ENTRIES:0 ESC=EXIT