Sper Scientific 850039 Conductivity TDS Meter - Datalogging User Manual

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7. BATTERY REPLACEMENT

When the left corner of the LCD displays the low battery icon install 4 new AA
1.5V batteries. Slide the BATTERY COVER (10) away from the instrument to
remove the old batteries. When the clock is not accurate, replace the 3V but-
ton cell battery located in the compartment behind the AA's. Re-attach the
battery cover when you have finished. In-spec measurements may be made
for several hours after the low battery indicator appears.

8. TROUBLESHOOTING

Gently insert a pin or small object into the SYSTEM RESET (14) while turning
on the meter.

9. OPTIONAL ACCESSORIES

840097 AC to DC 9V Adapter
840090 Water Resistant Instrument Pouch
840092 Bench-Top Tripod
840093 Field Tripod
840094 USB RS232 Serial Adapter

10. OFFSET (ZERO) PROCEDURE

With the SENSOR HEAD (18) completely dry, press the ▲ (5) button for at
least two seconds until the meter beeps and the display changes to zeros.

11. CONDUCTIVITY CALIBRATION

Although calibration is not generally needed, the following procedures should
be performed the first time a new probe is used, when the electrode is
changed, or after the meter has been in use for a long period of time.

D10

Polarity: 0 = Positive 1 = Negative

D11 & D12

Annunciator for Display

C = 01

F = 02 %RH = 04

D13

The upper display data = 1, The lower display data = 2

D14

D15

Start Word = 02

RS232 Com Port Settings: 9600, No parity, 8 Data bits, 1 Stop bit

Decimal Point (DP), position from right to the left
0 = No DP, 1= 1 DP, 2 = 2 DP, 3 = 3 DP