General Tools and Instruments WK7200 - Manual (Page 7)

FUNCTIONS MODE
1. Press button to enter the Hold function mode. The icon HOLD will appear, and the
reading value shown in the display can be locked. Return to measurement mode by pressing
the button again.
2. Press and hold button to enter the Maximum and Minimum function mode until the
flash icon of
MAX and MIN appears In the display. The value of maximum and minimum will
show in the display while pressing button lightly. To exit this mode, press and hold
button until icon
MAX and MIN disappears, and returns to measurement mode.
3. Press button to select the desired measurement mode Conductivity, TDS or Salinity
during insert Conductivity cell.
4. Press and hold button to change Degree °F or °C.
Note: (1) The display can not auto shut off under the status of MAX/MIN mode.
(2) Change new batteries when the battery indicator is flashing.
MAINTENANCE:
BATTERY REPLACEMENT
1. Loosen the screw with a screwdriver on the battery compartment cap.
2. Replace with fresh 4 “AAA” batteries, and note polarity.
3. Place the battery compartment cap and tighten the screw.
Note: (1) Be sure the batteries are in correct position by polarity.
(2) Don’t loosen the O-ring which has been mounted on cap.
ELECTRODE REPLACEMENT
1. Unscrew the electrode collar counterclockwise, and remove it completely.
2. Pull the electrode module out from the tester.
3. Plug a new electrode module into the tester socket carefully.
4. Place and tighten the electrode collar to make a good seal.
APPLICATIONS
Agriculture • Anti-freeze recycling • Aquarium • Boiler • Chemical industry • Cooling tower
• Drinking water • Fish farming • Food industry • Garden husbandry • Hydroponic Laboratory
usage • Plating industry • Swimming pool & Spa • Water treatment
WK7200 Manual-FINAL 8-18-08:Layout 1 8/15/08 11:52 AM Page 7