Calibration battery replacement probe maintenance, Operational guide accessories, Troubleshooting – Hanna Instruments HI 98331 User Manual
Page 2: Specifications
For better accuracy, frequent calibration of the instru-
ment is recommended. In addition, the instrument
must be recalibrated whenever:
a) The conductivity probe is replaced.
b) When high accuracy is required.
c) At least once a month.
Calibration procedure
Immerse the tip of the probe in a beaker with HI 70031P
1413 µS/cm solution. The tip of the probe should be
about 2” deep in the liquid. The probe should be
kept at least 1” from the walls and the bottom of the
beaker. Adjust the trimmer to read 1.41 on the LCD.
CALIBRATION
BATTERY REPLACEMENT
PROBE MAINTENANCE
The HI 73331 probe is very easy to use. The only
precaution to be taken is to clean the area surrounding
the connector before removing the probe, in order to
avoid dirtying the connector.
Taking measurements
Connect the HI 73331 probe. The meter requires the
probe in order to do any measurement. Press the
ON/OFF button to turn the meter ON. Place the
probe to the desired depth and saturate the soil if
needed. The conductivity value, automatically com-
pensated for temperature, will be shown on the LCD.
The meter displays conductivity in mS/cm, which is
equivalent to dS/m.
Pressing the TEMP button, the temperature measured
by the probe will be shown while the button is held.
Note: Before taking any measurement make sure the
meter has been calibrated.
OPERATIONAL GUIDE
ACCESSORIES
HI 73331
Direct soil penetration conductivity probe
HI 7031M 1413 µS/cm (1.4 mS/cm) @25ºC cali-
bration solution, 230 mL bottle
HI 7031L
1413 µS/cm (1.4 mS/cm) @25ºC cali-
bration solution, 460 mL bottle
HI 731326 Calibration screwdriver, 20 pieces
To change the batteries, remove the 4 screws located on
the top of the meter.
Once the top has been removed, carefully replace the 4
batteries located in the compartment while paying atten-
tion to their polarity.
Replace the top, making sure that the gasket is properly
seated in place, and tighten the screws to ensure a
watertight seal.
TROUBLESHOOTING
• Batteries must be changed whenever the readings are
erratic, the LCD is dim, or the meter loses calibration.
• The meter cannot measure neither conductivity nor
temperature without the HI 73331 probe.
CALIBRA
TION
SPECIFICATIONS
:
y
ti
v
it
c
u
d
n
o
C
e
g
n
a
R
:
e
r
u
t
a
r
e
p
m
e
T
*
)
m
/
S
d
(
m
c
/
S
m
0
0
.
4
o
t
0
0
.
0
C
°
0
.
0
5
o
t
0
.
0
:
y
ti
v
it
c
u
d
n
o
C
n
o
it
u
l
o
s
e
R
:
e
r
u
t
a
r
e
p
m
e
T
m
c
/
S
m
1
0
.
0
C
°
1
.
0
:
y
ti
v
it
c
u
d
n
o
C
y
c
a
r
u
c
c
A
)
C
°
0
2
@
(
:
e
r
u
t
a
r
e
p
m
e
T
)
m
c
/
S
m
0
0
.
2
o
t
0
0
.
0
(
m
c
/
S
m
5
0
.
0
±
)
m
c
/
S
m
0
0
.
4
o
t
0
0
.
2
(
m
c
/
S
m
0
3
.
0
±
C
°
1
±
e
r
u
t
a
r
e
p
m
e
T
n
o
it
a
s
n
e
p
m
o
C
e
r
u
t
a
r
e
p
m
e
t
,
c
it
a
m
o
t
u
A
d
e
x
if
)
ß
(
t
n
e
i
c
if
f
e
o
c
C
°
/
%
2
@
n
o
it
a
r
b
il
a
C
l
a
u
n
a
m
t
n
i
o
p
1
e
p
y
T
y
r
e
tt
a
B
e
p
y
t
n
o
tt
u
b
V
5
.
1
x
4
e
b
o
r
P
)
d
e
d
u
l
c
n
i(
1
3
3
3
7
I
H
n
o
it
a
rt
e
n
e
p
)"
5
.
4
(
m
m
2
2
1
t
n
e
m
n
o
ri
v
n
E
C
°
0
.
0
5
o
t
0
.
0
s
n
o
is
n
e
m
i
D
)"
0
.
1
x
6
.
1
x
4
.
6
(
m
m
6
2
x
0
4
x
3
6
1
e
b
o
r
p
r
o
f
m
m
0
5
1
t
h
g
i
e
W
).
z
o
5
.
3
(
g
0
0
1
Recommendations for Users
Before using this product, make sure that it is entirely suit-
able for the environment in which it is used. Operation of this
instrument in residential areas could cause unacceptable
interferences to radio and TV equipment.
Avoid touching the probes at all times.
Any variation introduced by the user to the supplied equip-
ment may degrade the instrument’s EMC performance.
To avoid electrical shock, do not use this instrument when
voltages at the measurement surface exceed 24 VAC or 60
VDC. To avoid damages or burns, do not perform any mea-
surement in microwave ovens.
*
The meter gives indicative readings with lower accuracy be-
tween 4mS/cm and 10 mS/cm.