Hanna Instruments hi 983314-0 User Manual

SELECTING SETPOINT
The meter allows to select the setpoint value that will act on
the alarm contact.
Press the SET key. The corresponding

led will light up and the display will
show the default or previously se-
lected value.

Adjust the SET trimmer on the front
panel by using a small screwdriver,
until the required setpoint value is
displayed.

CALIBRATION
Press the MEAS key. Immerse the probe in a solution of

known resistivity value. Wait for the reading to stabilize.

Adjust the calibration trimmer on the
top of the meter until the resistivity

value of calibration solution is displayed.

SELECTING TEMPERATURE COEFFICIENT

The reading is automatically corrected for temperature variations
by using the linear compensation method:

R

25

=R

t

(1+

β

(t-25))

where R

t

 is the resistivity at the temperature t.

The reference temperature is 25ºC.
The temperature coefficient 

β

 is selectable through the

jumpers on rear panel.

To select 

β

 = 4.5%/ºC, close the

jumper on the left:

To select 

β

 = 3.5%/ºC, close the

upper jumper:

To select 

β

 = 2.4%/ºC, close the

lower jumper:

Note :  if the coefficient 4.5%/ºC is selected, a minimum
measurement temperature of 10ºC is suggested to maintain
the best accuracy of the meter.

POWER CONNECTION
HI 983314-0 and HI 98331400
Connect a 2-wire power cable to the terminal strip while

paying attention to the correct positive and negative con-
tacts (12 VDC).
HI 983314-1
Connect a 3-wire power cable to the terminal strip while
paying attention to the correct earth, neutral and line
contacts (115/230 VAC).
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.
ALARM CONTACT
Use this contact for connection to an alarm or dosing system.
The unit acts as a switch to control an external device.
When readings are higher than selected setpoint (+Hyster-
esis), the relay contact is open and the “ABOVE” led lights

up. If measurements are lower than setpoint (-Hysteresis),
the relay contact is closed and the “BELOW” led lights up.
The Hysteresis is typically 0.20 M

Ω

/cm around setpoint.

Note : the relay contacts are not internally fuse protected.

TAKING MEASUREMENTS

Attach the resistivity probe to the
meter and immerse it in the solution

to be monitored while making sure
that the metal pins are completely
submerged.

Press the MEAS key, if necessary.
The corresponding led will light up
to indicate that you are operating

in measurement mode.

Wait for a few seconds to allow
stabilization of reading. The resistivity value of the solution

will be displayed on the LCD in M

Ω

/cm unit.

MECHANICAL DIMENSIONS AND ASSEMBLING OF PANEL-
MOUNTED UNIT
The supplied adjustable location brackets allow the controller to
slide into the cutout of the panel, and will hold the unit in
place. 95 mm (3.74’’) is the minimum of space required to
install the controller.

ISTR983314R1  12/2001

Before using these products, make sure that they are entirely suitable for the

environment in which they are used. Operation of these instruments in residential

areas could cause unacceptable interferences to radio and TV equipment. The

metal band at the end of the probe is sensitive to electrostatic discharges. Avoid

touching this metal band at all times. During operation, ESD wrist straps should be

worn to avoid possible damage to the probe by electrostatic discharges. Any

variation introduced by the user to the supplied equipment may degrade the

instrument’s EMC performance.

To avoid electrical shock, do not use these instruments when voltage at the

measurement surface exceeds 24 VAC or 60 VDC. Use plastic beakers to minimize

any EMC interferences.

To avoid damage or burns, do not perform any measurement in microwave ovens.

ERROR MESSAGES

Problems with probe connections, or tem-
perature too low to assure correct reading.

Over range condition.

HI 3314     Resistivity probe
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
HI 731326 Calibration screwdriver (20 pcs)
HI 740146 Mounting brackets