Walchem WDT400 Series, Instruction Manual, Page: 6 / 37

2.4 WDT Variables and their Limits
Low Limit High Limit
Conductivity menu
PPM Conversion Factor 0.200 ppm/µS/cm 1.000 ppm/µS/cm
Interval Time (sampling) 5 minutes 24:00 hours
Duration Time (sampling) 1 minute 59 min: 59 sec
% Calibration Range -50 +50
Temperature Menu
No variables
Bleed Menu
Set Point 0 µS/cm 10,000 µS/cm
Dead Band 5 µS/cm 500 µS/cm
Bleed Limit Time (set in hours/minutes) 1 minute 8 hrs: 20 min
(enabled)
0=unlimited (disabled)
Feed Menu
Feed Lockout Timer (Mode A) 1 second 99 min: 59 sec
Percent of Bleed (Mode B) 5 % 99 %
Feed Time Limit (Mode B) 1 minute 99 min: 59 sec
Percent of Time (Mode C) 5 % 99 %
Feed Cycle Time (Mode C) 10 minutes 59 min: 59 sec
Time per Contact (Mode D) 1 second 59 min: 59 sec
÷ Contacts by (Mode D) 1 contact 100 contacts
Time Limit (Mode D & E) 1 minute 99 min: 59 sec
Time/Vol (Mode E) 1 second 59 min: 59 sec
Vol to Initiate Feed (Mode E) 1 9,999
WM1 and WM2 Menus
Gallons per Contact 1 gal/contact 500 gal/contact
Liters per Contact 1 L/contact 500 L/contact
K Factor (Paddlewheel) 0.01 pulse/vol 999.99 pulses/vol
4-20 mA Menus 4 & 20 mA Settings 0 µS/cm 10,000 µS/cm
Access Code New Value 0 9999
Alarms Menu* High & Low (set to zero to disable) 1% 50%
Datalog Menu (Optional) No variables
Config Menu (Optional)
No variables
Upgrade Menu
No variables
*Note: The Alarm relay is non-programmable. Refer to the Main Menu diagram on page 16 for the list of error
conditions that trigger the alarm relay.
3