Hanna Instruments BL 983320-0/1 - Panel-Mounted EC Indicator & Controller Manual

INTRODUCTION

Dear Customer,
Thank you for choosing a Hanna product.
This manual will provide you with the necessary information for the correct operation of the meter. Please read it carefully before using the instrument.
If you need additional technical information, do not hesitate to e-mail us at tech@hannainst.com.
These instruments are in compliance with the directives.

PRELIMINARY EXAMINATION

Remove the instrument from the packing material and examine it carefully. If any damage has occurred during shipment, immediately notify your Dealer or the nearest Hanna Customer Service Center.

Each meter is supplied with:

• Mounting brackets
• Instruction manual

Note: Conserve all packing material until the instrument has been observed to function correctly. Any defective item must be returned in its original packing.

GENERAL DESCRIPTION

BL983320-0 and BL983320-1 are conductivity indicators and controllers with a relay output designed for simplicity of use in a wide range of applications.
Connections and wiring to probe, power supply and contacts are made via the terminal blocks on the rear panel.
The probe is easy to clean and requires little maintenance. Other features include: automatic temperature compensation of readings, single
point calibration, overtime control system, multi-colour LED for indicating if the meter is in measure- ment/dosing/alarm condition, possibility to set (Off-Auto-On switch) dosing action mode.

Two models are available:

• BL 983320-0 powered at 12 Vdc
• BL 983320-1 powered at 115 or 230 Vac

ASSEMBLING VIEW

FUNCTIONAL DESCRIPTION

Front panel

1. Liquid Crystal Display
2. Switch for selecting dosing mode:
   • OFF = dosing disabled
   • Auto = automatic dosage, depending on setpoint value
   • ON = dosing always active
3. "MEAS" key to set the instrument to measurement mode
4. "SET" key to display and set the setpoint value
5. "SET" trimmer to adjust the setpoint value
6. "CAL" trimmer
7. 3-colour LED indicator:
   • Green = meter in measurement mode
   • Orange/Yellow = dosing in progress
   • Red, blinking = indicates an alarm condition

Rear panel

1. Connections for EC probe
2. Power supply terminal:
   • for BL983320-0 model: 12 Vdc adapter
   • for BL983320-1 model: 115 Vac or 230 Vac option
3. This contact acts as a switch for driving the dosing system (e.g. dosing pump)
4. Not used contact
5. Jumper for enabling (jumper in) or disabling (jumper removed) the overtime control
6. Trimmer for overtime setting (typically from 5 to 30 minutes)

All external cables connected to the rear panel should end with cable lugs.

A circuit breaker (rated 6A max.) must be connected in close proximity to the equip- ment, and in a position easy to reach by the operator, for disconnection of the instrument and of all the devices connected to the relays.

OPERATIONS

REAR PANEL CONNECTIONS

Terminals #1: Probe

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

Terminals #2: Power Supply

• Model BL983320-0: connect the 2 wires of a 12 Vdc power adapter to the terminals +12 Vdc and GND.
• Model BL983320-1: 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.

Terminals #3: Dosing Contact

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

Note: The setpoint has a typical hysteresis value comparable to the meter accuracy.

Terminals #4: Not Used Contact

Overtime system: jumper (#5) and trimmer (#6)

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

Note: The overtime system works only if the OFF/Auto/ON switch is in "Auto" position.

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.

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.

CALIBRATION

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.

SETPOINT

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.

PROBE MAINTENANCE

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.

SPECIFICATIONS

ACCESSORIES

Documents / Resources

Download manual

Here you can download full pdf version of manual, it may contain additional safety instructions, warranty information, FCC rules, etc.

Download Hanna Instruments BL 983320-0/1 - Panel-Mounted EC Indicator & Controller Manual