General Tools and Instruments DCM7021 - Manual (Page 6)

3. Press button to select the desired measurement mode Conductivity, TDS or Salinity.
4. Press and hold button to change °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 flashes.
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. Replace the battery compartment cap and tighten the screw.
Note: (1) Be sure batteries are in the 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
DCM7021 Manual FINAL-8-15:Layout 1 8/15/08 12:00 PM Page 6