Hach 3650 manual Installation Completion Check List, Batteries, Instrument Clock Setting

1.6Installation Completion Check List

1.6.1Batteries

The instrument is designed to work on battery power. If battery power should drop, a LO BAT warning appears in the instrument LCD's top-left corner, and they should be replaced.

1.6.2 Instrument Clock Setting

If you use the instrument to store measurements for downloading to a PC, you should verify the date and time settings of the instrument's internal clock, as described in “Clock Settings” on page 39.

1.6.3 Electrochemical Sensor

Shipping conditions can have adverse effects on the sensor, thus you should perform a sensor service as described in the accompanying EC Sensors - Maintenance & Installation Manual before trying to make measurements.

However, if you intend to make trial measurements with the sensor as shipped, first examine the sensor head. To do this, remove the plastic base at the bottom of the sensor, then unscrew the calibration cap by loosening its collar (see “Electrochemical Sensor Components - Exploded View” on page 8).

Fig 1-7: Sensor Components and Membrane Assembly Order

Your sensor head is fitted with a screw-on protection cap. For a view of the sensor head, you must remove the cap, using the spanner key supplied in your recharge kit. Do this carefully, making sure not to wrinkle the membrane that covers the sensor head, held in place by a membrane holding ring. You should be able now to view the gold cathode in the center, surrounded by a guard ring electrode, and separated by a fine groove. The counter electrode is underneath the membrane support.