User Guide

OPERATIONAL GUIDE
POWER CONNECTION
HI 983313-0
Connect a 2-wire power cable to the terminal strip while
paying attention to the correct positive and negative polari-
ties (12 VDC).
HI 983313-1
Connect a 3-wire power cable to the terminal strip while
paying attention to the correct earth, neutral and line
contacts (115/230 VAC).
ALARM CONTACT
Use this contact (maximum 5A, 240VAC, 30VDC) for connec-
tion to an alarm or dosing system. The unit acts as a switch
to control an external device.
Notes:
• All external cables connected to the rear panel should
end with wire lugs.
• It is recommended to cover the unused terminals with
insulating tape.
• At start up the meter needs a few seconds to stabilize.
Wait until a stable reading is displayed.
ACCESSORIES
HI 7634-00 EC/TDS probe
HI 70031P 1413 µS/cm cal. solution, 20 mL sachet (25 pcs)
HI 70031M 1413 µS/cm cal. solution, 230 mL bottle
HI 7061M Electrode cleaning solution, 230 mL bottle
HI 710005 12 VDC power adapter, US plug
HI 710006 12 VDC power adapter, European plug
HI 710012 12 VDC power adapter, Australian plug
HI 710013 12 VDC power adapter, Southern Africa plug
HI 710014 12 VDC power adapter, UK plug
HI731326 Calibration Screwdriver (20 pcs)
HI 740146 Mounting brackets
CALIBRATION
Make sure the meter is in the measurement mode (the
“MEAS” LED lights on).
Immerse the probe in HI 7031 (1413 µS/cm) calibration
solution.
Shake briefly and wait for reading to stabilize.
Using a small screwdriver adjust the calibration trimmer
until the meter displays “1413” on the LCD.
SETPOINT
Press the “SET” key. The display will show the default or
previously adjusted value for the setpoint.
Using a small screwdriver, adjust the “SET” trimmer until
the required limit value is displayed.
PROBE MAINTENANCE
To improve 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.
Front view of the
panel-mounted unit
Side view of the
panel-mounted unit
Adjustable location brack-
ets (supplied with the
meter) allow the control-
ler to slide into the cutout
and will hold the unit
securely in place. 95 mm
(3.74") is the minimum
amount of space required to install the controller.
Panel-mounted
unit
assembling
view
73mm
2.87"
79mm
3.11"
42mm
1.65"
49mm
1.93"
95mm MIN
3.74"
76mm
3"
0.25/4mm
0.01/0.160"
79mm
3.11"
ADJUSTABLE
LOCATION
BRACKET
HI 993313 LAYOUT
HI 740146
FUNCTIONAL DESCRIPTION
FRONT PANEL
Keypad
SET To display set
point
MEAS To display
measurement
Trimmers
CAL For calibration
SET To adjust
setpoint
LEDs
SET ON when
LCD displays the set value
MEAS ON when LCD displays the measured value
ALARM ON when alarm contact is activated
REAR PANEL
1. Power Supply:
HI 983313-0 HI 983313-1
12 VDC 115/230 VAC
L1: Positive 230 VAC
L2: Negative 115 VAC
L3: ---- Neutral
L4: ---- Protection Earth
Note: the power input is internally protected by a 400 mA fuse
2. Alarm Contact: A1, A2.
HI 983313
EC CONTROLLER
SET MEAS
SET
ALARM
CAL
µS
0 ...1999 µS
OPERATING THE METER
All operations can be controlled via front panel keys and
trimmers.
“SET” and “MEAS” LEDs light up to indicate which is the
operating function.
Make sure that the meter is calibrated and the Setpoint is
properly selected before performing any measurement.
Attach the probe to the meter. Install the probe in the
fittings or immerse it in the solution to be monitored, while
making sure that metal pins are completely submerged.
Press the “MEAS” key.
3. Probe Connection: follow the above diagram and connect the
colored wires of probe cable as indicated. It is recommended
to connect the shield (P5) to avoid any interference.
The LCD will show the conductivity value of the solution in
µS/cm unit. Any initial variation on readings may be due
to temperature compensation.
The “ALARM” LED will light up when the alarm contact is
closed, to indicate an EC value higher than selected setpoint.