HANNA INSTRUMENTS BL 983320-1 (01) PDF MANUAL

HANNA INSTRUMENTS BL 983320-1 (01) PDF SUMMARY:

How should the HI 7634-00 probe be connected?

Connect the HI 7634-00 probe by following the wires colour indications.

How should the power be connected for the BL983320-0 model?

Connect the 2 wires of a 12 Vdc power adapter to the terminals +12 Vdc and GND.

How should the power be connected for the BL983320-1 model?

Connect a 3-wire power cable to the terminals while paying attention to the correct earth (PE), line (L) and neutral (N1 for 115 V or N2 for 230 V) contacts.

What does the dosing contact do?

This contact drives the dosing system, accordingly to the selected setpoint.

What is the Overtime system and how does it work?

This system allows the user to set a maximum dosing period, by adjusting the rear trimmer from 5 (min) to approx. 30 (max) minutes. When the set time is exceeded, any dosing action stops, the LED indicator on the front panel will blink Red and the LCD will show the “TIMEOUT” warning message. To exit the overtime condition, set the OFF/Auto/ON switch to “OFF” position, and then to “Auto” again.

How can the overtime feature be disabled?

For disabling the overtime feature, simply remove the jumper on the rear panel.

When does the overtime system work?

The overtime system works only if the OFF/Auto/ON switch is in “Auto” position.

What should be ensured before operating the meter?

Before proceeding make sure that: the meter has been calibrated; the setpoint value has been properly adjusted; all rear panel wiring and selections are correct; the Auto/OFF/ON switch is in the desired position.

How do I operate the meter?

Install or immerse the probe in the solution to be monitored, then press the “MEAS” key (if necessary). The LCD will show the EC (µS/cm) value. The LED indicator will light up Green when the meter is in measurement mode and dosing is not active, while will light up Orange/Yellow for signaling that a dosing action is in progress.

What do the different LED indicator colors signify?

• Green = meter in measurement mode
• Orange/Yellow = dosing in progress
• Red, blinking = indicates an alarm condition

How do I calibrate the meter?

To calibrate the meter, proceed as follows: ensure the meter is in measurement mode; immerse the probe in HI 7033 calibration solution (84 µS/cm); shake briefly and wait for reading to stabilize; adjust the “CAL” trimmer to read “84.0 µS” on the LCD.

How do I set the setpoint value?

Press the “SET” key: the display will show the default or previously adjusted value, together with the “SET” indication. Using a small screwdriver adjust the “SET” trimmer until the desired setpoint value is displayed. After 1 minute the meter automatically returns to the normal mode; or press the “MEAS” key.

How do I maintain the probe?

To improve the probe performance and prolong its life, it is recommended to clean it regularly. Immerse the tip of the probe in HI 7061 Cleaning Solution at least for one hour. If a more thorough cleaning is required, brush the metal pins with very fine sandpaper. After cleaning, rinse the probe with tap water and recalibrate the meter. When not in use, clean the probe before storing it.