Sper scientific Large Display Salinity Pen - 850036, Large Display Conductivity Pen - 850037 User Manual

Large Display

Salinity &

Conductivity Pens

850036 & 850037

2

Large Display
Salinity & Conductivity Pens

850036 & 850037

Copyright ©2013 by

Sper Scientic

ALL RIGHTS RESERVED
Printed in the USA

The contents of this manual may not be
reproduced or transmitted in any form or
by any means electronic, mechanical, or
other means that do not yet exist or may
be developed, including photocopying,
recording, or any information storage
and retrieval system without the express

permission from Sper Scientic.

Sper Scientic

8281 E. Evans Rd., Suite #103
Scottsdale, AZ 85260
[phone]

3

TABLE OF CONTENTS

INTRODUCTION . . . . . . . . . . . . . 4

FEATURES. . . . . . . . . . . . . . . . . 5

MATERIALS SUPPLIED . . . . . . . . . 5

POWER SUPPLY . . . . . . . . . . . . .6

LCD DISPLAY . . . . . . . . . . . . . . . 6

APPENDICES . . . . . . . . . . . . . . 45

BATTERY REPLACEMENT . . . . . . . 52

MAINTENANCE . . . . . . . . . . . . . 53

TROUBLESHOOTING . . . . . . . . . . 54

WARRANTY . . . . . . . . . . . . . . . 56

850036 SALINITY PEN . . . . . . . . . .7

SET UP . . . . . . . . . . . . . . . . . . 8

CALIBRATION . . . . . . . . . . . . . 12

MEASUREMENT PROCEDURES . . . 16

SPECIFICATIONS . . . . . . . . . . . 19

ERROR CODES . . . . . . . . . . . . 20

850037 CONDUCTIVITY PEN . . . . . . 23

SET UP . . . . . . . . . . . . . . . . . 24

CALIBRATION . . . . . . . . . . . . . 32

MEASUREMENT PROCEDURES . . . 38

SPECIFICATIONS . . . . . . . . . . . 42

ERROR CODES . . . . . . . . . . . . 43

4

INTRODUCTION

The Sper Scientic Large Display Salinity

(Model 850036) and Conductivity (Model

850037) Pens provide highly stable and
accurate readings with a large LCD that
simultaneously displays the parameter
being measured and temperature in

°C or °F. The pens are designed for simple
one-hand operation. The case is IP65
waterproof, and will oat if accidentally
dropped into the water.

Salinity is displayed not as a percentage
but as parts per thousand (ppt), which
is approximately grams of salt per liter

of solution.

Conductivity is displayed as mhos
per centimeter (M/cm) or siemens
per centimeter (S/cm). Because a mho
(or siemen) is a large unit, microsiemen
or millisiemen typically is used (µS/cm,

mS/cm).

5

FEATURES

• IP65 waterproof housing

• Dual display with ATC

• Data hold

• Pen size for portability

• Built-in probe with protective cap

• One touch, multi-point calibration

• Auto-power-o󰀨

• Low battery indicator

MATERIALS SUPPLIED

• 4 LR44 button cell batteries

• Instruction Manual

6

POWER SUPPLY

The pen is powered by 4 LR44 batteries.

Check the batteries when:

• Using the unit for the rst time

• The low battery indicator appears
on the LCD

• The pen will not turn on

LCD DISPLAY

LCD DISPLAY

Hold data on the LCD
Calibration Mode

Low battery indicator

Unit of conductivity

Measured value

Unit of TDS and
Salinity

Unit of liquid
temperature °C or °F

Temperature reading

7

Large Display

Salinity Pen

850036

8

SETUP MODE

The advanced Setup Mode allows you
to customize the pen’s preferences and
defaults:

1. Press SET to turn the pen on.

2. From Measurement Mode, press SET

for more than 2 seconds to enter Setup

Mode and change parameters.

Temperature Units (tUt)

To select the Celsius or Fahrenheit
temperature scale:

1. Press SET for 2 seconds to enter setup.

2. “t” will appear on the primary display of

the LCD and “P1.0” will appear on the
secondary display.

3. Press SET again for less than one

second to enter the unit setting.

4. Press ▲ or ▼ to select C (Celsius) or

F (Fahrenheit). Press SET for less than
one second to conrm the unit selection.

Press SET for more than 2 seconds to

return to P1.0 without saving.

9

5. When in P1.0, press ▲ to advance to

the next setup function or press SET
for more than 2 seconds to return to

Measurement Mode.

Resetting the Pen (rSt)

When the pen is reset, all parameters

will be reset to factory default values.

1. Press SET for 2 seconds to enter setup.

2. Press ▲ to select the reset pen setting.

“rst” will appear on the main display of
the LCD and “P3.0” will appear on the
secondary display.

3. Press SET again for less than one

second to enter the reset setting.

4. Press ▲ to select Y (yes) or N (no).

SETUP MODE

10

5. Press SET for less than one second to

conrm the selection or press SET for
more than 2 seconds to return to P3.0
without saving.

6. When in P3.0, press ▲ to advance to

the next setup function or press SET
for more than 2 seconds to return to

Measurement Mode.

Calibration Review (CAL)

1. Press SET for 2 seconds to enter setup.

2. Press ▲ to select the calibration review

setting. “CAL” will appear on the primary
display of the LCD and “P4.0” will
appear on the secondary display.

Range 1 Calibration Information:

3. When in P4.0, press SET for less than

one second to enter P4.1 to review the
last calibration concentration. If the pen
is not yet calibrated, “---” will appear on
the LCD.

11

Range 2 Calibration Information:

4. When in P4.1, press ▲ to enter P4.2 to

review the last calibration concentration.
If range 2 is not yet calibrated, “---” will
appear on the LCD.

5. When in P4.1 or P4.2, press SET for

less than one second to conrm and
return to P4.0.

6. When in P4.0, press ▲ to advance to

the next setup function or press SET
for more than 2 seconds to return to

Measurement Mode.

Note…

P4.1 and P4.2 Modes allow review of the

calibration information but are not used

during the calibration procedure.

Selecting the Measurement Range (rAn)

There are two measurement ranges.
The pen defaults to auto-ranging:

Salinity

Range 1 0 to 10.00 ppt

Range 2 10.1 to 70.0 ppt

12

To manually select the measurement range:

1. Press SET to turn the pen on.

2. Press ▲ for more than 2 seconds to

select range 1. Press ▲ for more than
2 seconds to select range 2.

CALIBRATION

Selecting the Calibration
Standard Solution

For best results, select a NaCl standard
near the sample value that you are

measuring. Alternatively, use a calibration
solution value that is approximately ⅔ of

the full scale of the measurement range

that you plan to utilize.

Do NOT reuse the calibration solution.
Contaminants in the solution will a󰀨ect the
calibration and the accuracy. Use fresh
solution each time.

The previous calibration data will be
replaced after re-calibrating. However,

13

the pen will retain the calibration data
for other ranges that have not yet been

re-calibrated.

Selecting the Calibration Schedule

Calibration is necessary and should be

performed regularly. Soak the probe for 15

minutes before calibration or measurement

to minimize drift. If the pen is used in the
mid ranges, calibrate the unit monthly.

If the measurement is performed at
extreme temperatures or within the
concentration listed below, calibrate

the unit weekly.

Model Concentration

Salinity Pen < 0.10 ppt > 5.0 ppt

14

Salinity Calibration

1. Place the probe into deionized or

distilled water for about 30 minutes to

rinse the probe.

2. Select the NaCl standard for calibration.

3. Pour 3 cm (deep) of solution into two
separate containers (A & B).

4. Press SET to turn the pen on.

5. Rinse the probe in one of the
containers. Gently stir the probe.

6. Dip the rinsed probe into the other
container. Tap the probe on the bottom
of the container to remove air bubbles.

Let the probe stabilize to the solution

temperature (allow 15 minutes).

7. Press CAL for more than 2 seconds to
begin calibration. “CAL” and the salinity
value of the solution will ash on the LCD.

8. Press ▲ or ▼ to adjust the value on the

primary display to match the value of

the standard bu󰀨er. You can adjust the

salinity reading ± 30% from the detected

value. If the detected value and the
standard value di󰀨er by more than ±
30%, clean or replace the pen.

15

9. When “CAL” stops ashing on the

LCD, press SET for less than 1 second

to conrm the value. The pen will

return to Measurement Mode for salt

measurement. To exit Calibration Mode

without saving, press SET for more than

2 seconds. This allows you to retain the

pen’s previous calibration data for the

current range as you proceed. If “CAL”
ashes on the LCD continually, check

that the calibration solution is stable and

that the input value (Step 8) is correct.

10. Repeat Steps 1-9 for other ranges
as needed.

Note…

If the standard value is over the measuring
range or 10% less, the displayed value will
be equal to the range limit or 10% of the

range limit.

16

MEASUREMENT PROCEDURES

1. Remove the probe cover from the pen.

2.

Press SET to turn the pen on.

3. The pen defaults to auto-ranging mode.

The auto-ranging function determines
and selects a range that will provide the

greatest resolution and accuracy.

4. To manually select the measurement

range: Press SET to turn the pen on.
Press ▲ for more than 2 seconds to
select range 1. Press ▲ for more than
2 seconds to select range 2.

Note...

Accuracy is a percent of full-scale; use
your pen in the lowest range to achieve

the greatest accuracy. Error codes

E02/E03 will appear on the LCD if the
measured value is below or above the

limit value. Please re-select the range.

17

5. Rinse the probe tip with de-ionized or

distilled water before use to remove

any impurities adhering to the probe. If

the probe tip is dehydrated, soak it for
30 minutes to prevent contaminants
from slowing down the measurement

and accuracy.

6. Immerse the probe tip completely into

the sample. Ensure that there are no
air bubbles trapped in the probe slot.

Gently stir the probe to remove air
bubbles, ensuring that the probe tip

is submerged while stirring.

7. Stir the probe gently to create a uniform

sample. Wait about 15 minutes for the
reading to stabilize.

8. The unit of measure will ash on the

LCD to indicate that the pen is in
Measurement Mode. When the
reading is stable, the unit of measure

will stop ashing.

Hold Function

1. Press HLD to freeze the current

readings on the display. “Hold” will
appear on the LCD.

18

2. Press HLD again to release the

hold function.

Turning the Pen O󰀨

1. Press SET to turn the pen o󰀨 from

Measurement Mode.

2. To turn the pen o󰀨 from Setup Mode,

press SET for more than 2 seconds
to return to Measurement Mode, then
press SET again.

Auto Power O󰀨

1. To save battery life, the pen will

automatically turn o󰀨 after 20 minutes

of inactivity. To disable this function:

2. Press SET to turn the pen o󰀨.

3. Press SET and ▼ simultaneously until

“n” appears on the LCD. Release the
keys to return to Measurement Mode.
Auto-power-o󰀨 is now disabled.

Note…

The auto-power-o󰀨 function will be
enabled each time the pen is turned o󰀨.

19

Accuracy

±1% Full Scale

± 1 digit (0.0-10.0 ppt)

or ±2% Full Scale

±1 digit (10.1-70.0 ppt)

Range

0.00-10.00 ppt (NaCl)
or 10.1-70.0 ppt (NaCl)

Resolution 0.01 ppt or 0.1 ppt

Calibration One point per range

TDS Factor

Built-in NaCl conductivity
to TDS factor

Temperature

Coe󰀩cient

Built-in NaCl temperature

coe󰀩cient

Reference
Temperature

Fixed at 25°C

Operating
Temperature

0 to 50°C (32 to 122°F)

Battery Life >80 hours continuous use

Weight 2.5 oz (68 g)

Dimensions

6½" x 1½" x 1½"
(165 x 38 x 38 mm)

SPECIFICATIONS

20

ERROR CODES

Salinity

- - - The pen is in manual ranging 1 but

the salinity measurement is higher

than 10.0 ppt; Press ▲ for more

than 2 seconds to change to manual

ranging 2 or auto-ranging mode.

E03 The salt value is over the range limit

(70.0 ppt) or the pen is damaged;
Put the pen in standard bu󰀨er
solution (the bu󰀨er concentration
must be lower than the range limit).

If E03 still appears, send the pen to

Sper Scientic for repair.

E04 Error in measuring original data

(damaged temperature sensor,

temperature out of specications
or salinity error). E04 will disappear
when the original error is resolved.

21

Temperature

E01 The temperature circuit is

damaged; Send the pen to

Sper Scientic for repair.

E02 The temperature value is below the

range limit (0°C) or the temperature
circuit is damaged; Place the pen
in room temperature for 5 minutes,
if E02 still appears, send the pen

to Sper Scientic for repair.

E03 The temperature value is above

the range limit (50°C) or the
temperature circuit is damaged;
Place the pen in room temperature
for 5 minutes, if E03 still appears,

send the pen to Sper Scientic
for repair.

22

23

Large Display

Conductivity Pen

850037

24

SETUP MODE

The advanced Setup Mode allows you
to customize the pen’s preferences
and defaults:

1. Press SET to turn the pen on.

2. From Measurement Mode, press SET

for more than 2 seconds to enter Setup

Mode and change parameters.

25

Temperature Units (tUt)

To select the Celsius or Fahrenheit
temperature scale:

1. Press SET for 2 seconds to enter setup.

2. “t” will appear on the primary display of

the LCD and “P1.0” will appear on the
secondary display.

3. Press SET again for less than one

second to enter the unit setting.

4. Press ▲ or ▼ to select C (Celsius) or

F (Fahrenheit). Press SET for less than
one second to conrm the unit selection.

Press SET for more than 2 seconds to

return to P1.0 without saving.

5. After conrming the temperature unit

selection, you may continue to set other
temperature related parameters by
pressing SET for more than 2 seconds

to return to P1.0.

6. When in P1.0, press SET for more

than 2 seconds to return to

Measurement Mode.

26

Reference (Normalization)
Temperature (tnr)

After saving the temperature unit setting,
the pen will automatically enter the

reference temperature setup.

1. Press ▲ to select 20°C or 25°C.

2. Press SET for less than one second

to conrm the value or press SET for
more than 2 seconds to return to P1.0
without saving.

press " " more than 2 sec to enter
setup mode. Press " "or " " or
" " to sel ect
momentarily aga in to enter unit setting.

Press " " or " " to select C /F.
Press " " momentarily to confirm the
unit or press " " more than 2 sec to
return to P1.0 without saving.

Afte r confirming the unit, you can
continuously set another temp. related
parameters (except 8371) or press
" " more than 2 seconds to return
to P1. 0.

While in P1.0, press " " for more
than 2 seconds to return to measure-
ment mode.

P1.0, then press " "

or

Short
press

Long
press

or

Long
press

27

Temperature Coe󰀩cient (tCo)

1. Press ▲ or ▼ to change the

temperature coe󰀩cient from 0.0 to 4.0.

2. Press SET for less than one second

to conrm the value or press SET for
more than 2 seconds to return to P1.0
without conrming the temperature
coe󰀩cient value.

Press " "or " "

o

o

lue.

P1.1 P1.2 P1.3

28

Resetting the Pen (rSt)

When the pen is reset, all parameters
(including calibration information) will be

reset to factory default values.

1. Press SET for 2 seconds to enter setup.

2. Press ▲ to select the reset pen setting.

“rst” will appear on the main display of
the LCD and “P3.0” will appear on the
secondary display.

3. Press SET again for less than one

second to enter the reset setting.

4. Press ▲ to select Y (yes) or N (no).

5. Press SET for less than one second to

conrm the selection or press SET for
more than 2 seconds to return to P3.0
without saving.

NOTE:
Pay attention
to the dif

fe-
renc e between
short or long
pres s " "
after setting
the tds value.

29

Calibration Review (CAL)

1. Press SET for 2 seconds to enter setup.

2. Press ▲ to select the calibration review
setting. “CAL” will appear on the primary
display of the LCD and “P4.0” will
appear on the secondary display.

Range 1 Calibration Information:

3. When in P4.0, press SET for less than
one second to enter P4.1 to review
the last calibration concentration. If
the pen is not yet calibrated, “---”
will appear on the LCD.

Range 2 Calibration Information:

4. When in P4.1, press ▲ to enter P4.2

to review the last calibration concentration.
If range 2 is not yet calibrated, “---” will
appear on the LCD.

Note…

When in P4.1 or P4.2, press SET for
less than one second to conrm and
return to P4.0.

30

P4.1 and P4.2 Modes allow review of the

calibration information but are not used

during the calibration procedure.

When in Temperature Parameter (P1.0),
Resetting the Pen (P3.0) or Calibration
Review (P4.0) Setup Modes, press SET

for more than 2 seconds to return to

Measurement Mode.

31

Selecting the Measurement Range (rAn)

There are two measurement ranges.
The pen defaults to auto-ranging

Conductivity

Range 1

0 to 1999 µS

Range 2

0 to 19.99 mS

To manually select the measurement range:

1. Press SET to turn the pen on.

2. Press ▲ for more than 2 seconds to
select range 1. Press ▲for more than
2 seconds to select range 2.

2.Press " " or " " more than 2
seconds to select the range.

To manual select the measurement
range:

1. Turn on the meter and stay at normal
measurement mode.

(Default)

Press" "
> 2 second

Press" "
> 2 second

32

CALIBRATION

Selecting the Calibration
Standard Solution

For best results, select a conductivity
standard near the sample value that

you are measuring. Alternatively, use

a calibration solution value that is
approximately 2/3 of the full scale of
the measurement range that you plan

to utilize.

For example, in the 0 to 1999 µS range,

use 1413 µS solution for calibration.
Do NOT reuse the calibration solution.
Contaminants in the solution will a󰀨ect the
calibration and the accuracy. Use fresh
solution each time.

Refer to the following table. For best

results, use the recommended solution
for various conductivity ranges

33

Conductivity
Measuring Range

Recommended Cal.

Solution Range

1

0 to 1999 µS 600 to 1700 µS

2 0 to 19.99 mS 6.0 to 17.00 mS

The previous calibration data will be

replaced after re-calibrating. For example,

if you previously calibrated the conductivity
pen at 1413 µS in the 0 to 1999 µS range,
when you re-calibrate at 1500 µS again
(also in the 0 to 1999 range), the previous
1413 µS calibration point will be replaced

in this range (0 to 1999 µS). However, the

pen will retain the calibration data for other

ranges that have not yet been re-calibrated.

Note…

The temperature coe󰀩cient of the pen
defaults to 2.1% per °C and provides good
results for most applications. To reset
the coe󰀩cient, see page 27. You may

also refer to Appendix B on page 47 to

calculate the temperature coe󰀩cient.

34

The default value of the reference

temperature is set at 25°C. To normalize to
a di󰀨erent value, see page 33. Determine

the calibration standard value for your
reference temperature before resetting

the reference temperature. Contact the

solution distributor for the calibration

standard value of the solution.

Selecting the Calibration Schedule

Calibration is necessary and should be

performed regularly. Soak the probe

for 15 minutes before calibration or

measurement to minimize drift. If the pen

is used in the mid ranges, calibrate the

unit monthly.

If the measurement is performed at
extreme temperatures or within the
concentration listed below, calibrate

the unit weekly.

Model Concentration

Conductivity Pen

< 100 µS

> 2 mS

35

Conductivity Calibration

1. Place the probe into deionized or

distilled water for about 30 minutes to

rinse the probe.

2. Select the conductivity standard for
calibration. (Refer to page 26)

3. Pour 3 cm (deep) of calibration solution
into two separate containers (A & B).

4. Press SET to turn the pen on. Press

CAL for more than 2 seconds to enter

Calibration Mode.

5. Rinse the probe in one of the
containers. Gently stir the probe.

6. Dip the rinsed probe into the other
container. Tap the probe on the bottom
of the container to remove air bubbles.

Let the probe stabilize to the solution

temperature (allow 15 minutes).

CALIBRATION

3. Pour 3 cm (deep) of buffer solution
into two separate containers (A & B).

4. Press SET to turn the meter on.
Press CAL for more than 2 seconds
to enter Calibration Mode.

5. Rinse the probe in one of the
containers. Gently stir the probe.

6. Dip the rinsed probe into the other
container. Tap the probe on the
bottom of the container to remove air
bubbles. Let the probe stabilize to
the solution temperature (allow 15
minutes).

A (Step 5) B (Step 6)

36

7. Press CAL for more than 2 seconds to
begin calibration. The conductivity value
of the solution will ash on the LCD.

8. Press ▲ or ▼ to adjust the value on

the primary display to match the value

of the standard bu󰀨er. You can adjust

the conductivity reading ± 30% from the

detected value. If the detected value
and the standard value di󰀨er by more
than ± 30%, clean or replace the pen.

Example:
Standard: 10 µS; Detected value: 19 uS
Adjustable range: ± 5.7 µS (19*30%)
Under the above situation, the values

di󰀨er by over 30%.

Note…

If the standard value is over the measuring
range or 10% less, the displayed value will
be equal to the range limit or 10% of the

range limit.

Example 1:
Standard: 22 µS; Detected value: 19 µS
Adjustable range: ± 5.7 µS (19*30%)

37

Although the values di󰀨er less than 30%,
the 22 µS is still over the range limit. The
maximum input value is 19.99 µS.

Example 2:

Standard: 1.6 mS; Detected value: 2.1 mS
Adjustable range: ± 0.63 mS (2.1*30%)
Although the measured value di󰀨ers less
than 30%, the 1.6 mS is still less than the
10% range limit (1.99). The maximum
input value is 1.99 mS.

9. When “CAL” stops ashing on the LCD,

press SET for less than 1 second to

conrm the value. The pen will return to
Measurement Mode. To exit Calibration

Mode without saving, press SET for

more than 2 seconds. This allows you

to retain the pen’s previous calibration
data for the current range as you

proceed. If “CAL” ashes on the LCD

continually, check that the calibration
solution is stable and that the input

value (Step 8) is correct.

10. Repeat Steps 1-9 for other ranges
as needed.

38

Note…

When the pen is switched from
Measurement Mode to Calibration Mode,

it will display the factory default value.

Therefore, if the pen was previously

calibrated, the display may appear to jump

to the factory default value when entering
Calibration Mode

MEASUREMENT PROCEDURES

1. Remove the probe cover from the pen.

Remove the cover
from the bottom
of meter to expose
the electrode.

Electrode

Remove the cover from
the bottom of pen to

expose the electrode.

Remove the cover
from the bottom
of meter to expose
the electrode.

Electrode

3.

The meter is default in auto-ranging
status once powered on.
Auto-ranging determines and selects
a range which gives you the greatest
resolution and accuracy. Alternatively,

you can manually select the ranges.
For example, if you prefer the meter
to display a reading as 0.50 mS
instead of 500 µS, you just need to
press “ “ m

select 19.99 mS range when you

are in normal measurement mode.

ore than 2 seconds

to

See page 12
for the detail

39

Remove the cover
from the bottom
of meter to expose
the electrode.

Electrode

3.

The meter is default in auto-ranging
status once powered on.
Auto-ranging determines and selects
a range which gives you the greatest
resolution and accuracy. Alternatively,

you can manually select the ranges.
For example, if you prefer the meter
to display a reading as 0.50 mS
instead of 500 µS, you just need to
press “ “ m

select 19.99 mS range when you

are in normal measurement mode.

ore than 2 seconds

to

See page 12
for the detail

2. Press SET to turn the pen on.

3. The pen defaults to auto-ranging mode.

The auto-ranging function determines
and selects a range that
will provide the greatest resolution

and accuracy.

4. The pen also provides a manual range

option. For example, to view a reading
of 0.50 mS rather than 500 µS: From
Measurement Mode, press ▲ for more
than 2 seconds to select the 19.99 mS
range. See page 31 for instructions on
manually selecting the range.

Note...

Accuracy is a percent of full-scale; use
your pen in the lowest range to achieve

the greatest accuracy. Error codes

E02/E03 will appear on the LCD if the
measured value is below or above the

limit value. Please re-select the range.

40

5. Set the temperature coe󰀩cient to the
correct value. The pen defaults to 2.1%

per °C, which will typically provide

good results. See page 27 to reset the
temperature coe󰀩cient.

6. Select the reference temperature. The
pen defaults to 25°C. To more than
2 seconds to select the 19.99 mS
range. See page 26 for instructions on
manually selecting the range. normalize
to 20°C instead, see page 26.

7. Rinse the probe tip with de-ionized or

distilled water before use to remove
any impurities adhering to the probe.
If the probe tip is dehydrated, soak it
for 30 minutes to prevent contaminants
from slowing down the measurement

and accuracy.

8. Immerse the probe tip completely into
the sample. Ensure that there are no
air bubbles trapped in the probe slot.

Gently stir the probe to remove air
bubbles, ensuring that the probe tip is

submerged while stirring.

41

9. Stir the probe gently to create a uniform
sample. Wait about 15 minutes for the
reading to stabilize.

10. The unit of measure

will ash on the LCD to

indicate that the pen is in

Measurement Mode. When

the reading is stable, the
unit of measure will stop

ashing.

Hold Function

1. Press HLD to freeze the
current readings on the

display. “Hold” will appear
on the LCD.

2. Press HLD again to release
the hold function.

8351

8351

42

Accuracy

± 1% Full Scale
± 1 digit

Range

0 to 1999 µS or

0 to 19.99 mS

Resolution 1 µS or 0.01 mS

Temperature
Accuracy

± 2°F
± 1°C

Temperature
Resolution

0.1°C/°F

Calibration One point per range

Temperature

Coe󰀩cient

0 to 4.0%/°C

Reference
Temperature

20°C or 25°C

Operating
Temperature

0 to 50°C (32 to 122°F)

Battery Life >80 hours continuous use

Weight 2.5 oz (68 g)

Dimensions

6½" x 1½" x 1½"
(165 x 38 x 38 mm)

SPECIFICATIONS

43

ERROR CODES

Conductivity

- - - The pen is in manual ranging 1 but

the conductivity measurement is

higher than 1999 µS; Press ▲ for

more than 2 seconds to change to
manual ranging 2 or auto-ranging

mode.

E03 The conductivity value is over

the range limit (19.99 mS) or the

pen is damaged; Put the pen in

standard bu󰀨er solution (the bu󰀨er

concentration must be lower than

the range limit). If E03 still appears,
send the pen to Sper Scientic for
repair.

E04 Error in measuring original data

(damaged temperature sensor or

temperature out of specications)

results in this conductivity value
error; Refer to the temperature

error codes (page 44). E04 will

disappear when the temperature

error is resolved.

44

Temperature

E01 The temperature circuit is

damaged; Send the pen to Sper

Scientic for repair.

E02 The temperature value is below the

range limit (0°C) or the temperature
circuit is damaged; Place the pen
in room temperature for 5 minutes,
if E02 still appears, send the pen to

Sper Scientic for repair.

E03 The temperature value is above

the range limit (50°C) or the
temperature circuit is damaged;
Place the pen in room temperature
for 5 minutes, if E03 still appears,

send the pen to Sper Scientic
for repair.

45

Appendices

46

APPENDIX A:

Program Function Default Note

P1.1 Select °C/°F °C Temp unit

P1.2 Reference

Temperature

25°C Selectable

25°C or
20°C

P1.3 Temperature

Coe󰀩cient

2.1%

/°C

Adjustable

0.4 to 10%

P3.1 Factory

Default

NO Retain

your
current
settings

P4.1 Viewing

previous
calibration
data

---- No cal
data for
1st range

P4.2 Viewing

previous
calibration
data

---- No cal
data for
2nd range

47

APPENDIX B:

Temperature E󰀨ect

Conductivity measurements are
temperature dependent; if the temperature

increases, conductivity increases. For

example, the conductivity measured in a

0.01 M KCl solution at 20°C is 1.273 mS/
cm, whereas at 25°C, it is 1.409 mS/cm.

The concept of reference temperature
(normalization temperature) was
introduced to allow the comparison
of conductivity results obtained at

di󰀨erent temperatures. The reference
temperature is usually 20°C or 25°C. The

pen measures the actual conductivity
and temperature, then converts it
to the reference temperature using
a temperature correction function
and displays the conductivity at the

reference temperature. It is mandatory to

associate the temperature together with

a conductivity result. If no temperature

correction is applied, the conductivity

48

is the value taken at the measurement

temperature. The Large Display Salinity

(Model 850036) and Conductivity (Model

850037) Pens automatically use linear

temperature correction.

Linear Temperature Correction

In moderately and highly conductive
solutions, temperature correction can be
based on a linear equation involving a

temperature coe󰀩cient (θ). The coe󰀩cient

is usually expressed as a conductivity

variation in %/°C. Linear temperature

correction is used for saline, acids, and

leaching solutions.

Where:

K

Tref

= Conductivity at Tref

KT = Conductivity at T

T

ref

= Reference temperature

T = Sample temperature

θ = Temperature coe󰀩cient

example, if the TDS value is ppm, the conductivity
value must be in uS; if the TDS value is in ppt, the
conductivity value must be in mS.

Check this number by multiplying the conductivity

reading by the factor in the ab

ove formula and the

result is the TDS in ppm.

Appendix D: Temperature Effect

Conductivity measurements are temperature
dependent, if the temperature increases, conductivity
increases. eg: the conductivity measured in a 0.01

0

M KCl solution at 20 C is 1.273 mS/cm, whereas, at

0

25 C, it is 1.409 mS/c m.

The concept of reference temperature (Normalization
temperature) was introduced to allow the comparison
of conductivity results obtained at different temperature.

0 0

The reference temperature is usually 20 C or 25 C.
The conductivity meter measures the actual COND.
and temperature an

d then converts it to the reference
temperature using a temperature correction function
and displays the conductivity at the reference temp..
It is mandatory to always associate the temperature
together with a conductivity result. If no temperature
correction is applied, the conductivity is the value
taken at measurement temperature. The 830x meter
used linear temperature correction.

Linear temperature correction:

In moderately and highly conductive solutions,
temperature correction can be based on a linear
equation involving a tempera

ture coefficient ( ). The

coefficient is usually expressed as a conductivity

0

variation in %/ C.
Linear temperature correction is used, e.g. for saline
, acids and leaching solutions.

KTref=

T-

T

ref

KT

100

100+

( )

49

Note…

The correction is accurate only within a
limited temperature range around T1 and

T2. The greater the di󰀨erence between T
and Tref, the higher the risk of error.

Calculating Temperature Coe󰀩cients (θ)

By measuring the conductivity of a
sample at temperature T1 close to Tref
and another temperature T2, you can

calculate the temperature coe󰀩cient by

using the following equation:

APPENDICES

T2 should be selected as a typical sample
temperature and should be approximately

10°C di󰀨erent from T1. The temperature
coe󰀩cients of the following electrolytes

generally fall into the following ranges:

50

Acids: 1.0 - 1.6%/°C
Bases: 1.8 - 2.2%/°C
Salts: 2.2 - 3.0%/°C
Drinking water: 2.0%/°C
Ultra-pure water: 5.2%/°C

51

Battery Replacement,

Maintenance,

& Troubleshooting

52

BATTERY REPLACEMENT

Note…

If the pen will not be in

use for a month or longer,

remove the batteries and

replace when ready to

use the pen.

BATTERY REPLACEMENT

1. Press SET to turn the pen o󰀨.

2. Remove the battery cover located

on the top of the unit by rotating

counterclockwise. Do NOT discard the
black washer.

3. Remove the old batteries and replace

with 4 new LR44 batteries, ensuring

correct polarity.

4. Replace the battery cover by rotating in
the clockwise direction.

53

MAINTENANCE

Ensure that the probe is clean before use

and storage. To clean:

1. Remove the probe cap.

2. Rinse the probe carefully in deionized

water, replace the cap, and store dry in

an environment of 0 to 50°C.

Note…

If the probe has been exposed to a solvent
that is immiscible with water, clean the
probe with a solvent that is miscible with

water (i.e., ethanol or acetone), then
carefully rinse with water.

54

TROUBLESHOOTING

Pen does not turn on:

1. Press SET for more than 1 second.

2. Check that the batteries are in place,

making good contact, and placed with

correct polarity.

3. Replace with new batteries and
try again.

4. Remove the batteries for one minute
and then replace the batteries.

Display disappears:

If the low battery icon appears on the LCD
before the display disappears, replace with

new batteries.

Air bubbles adhering to the probe:

It is typical for air bubbles to adhere to the

large slot in the probe. These air bubbles
will greatly a󰀨ect the accuracy and should
be removed.

55

Many ai r bubbles adhered!

To remove the air bubbles:

1. Stir the probe.

2. Dip the probe into the solution at

an oblique angle (at a slant, not
perpendicular to solution). Dipping
the probe perpendicularly will cause

air bubbles to form.

3. Soak the probe in solution for 15-30
minutes. Inspect the probe carefully for
air bubbles.

4. If air bubbles remain on the probe, tap

the bottom of the container gently and

stir the probe.

5. If the preceding methods fail, remove

the probe from the solution and blow on

the probe to remove the air bubbles.

56

WARRANTY

Sper Scientic warrants this product against

defects in materials and workmanship for
a period of one (1) year from the date of
purchase, and agrees to repair or replace

any defective unit without charge. If your

model has since been discontinued, an

equivalent Sper Scientic product will
be substituted if available. This warranty

does not cover probes, batteries, battery
leakage, or damage resulting from accident,

tampering, misuse, or abuse of the product.

Opening the pen to expose its electronics

will void the warranty.

To obtain warranty service, ship
the unit postage prepaid to:

SPER SCIENTIFIC, LTD.

8281 E. EVANS RD., SUITE #103

SCOTTSDALE, AZ 85260

The defective unit must be accompanied by
a description of the problem and your return

address. Register your product online at
www.sperwarranty.com, within 10 days.

Rev 12/11/2017