Sper Scientific 860031 User Manual

Bench-Top Meters

860031, 860032, 860033

Instruction Manual

1

Bench-Top Meters 860031, 860032, 860033

Copyright ©2009 by Sper Scientific

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 Scientific.

7720 E. Redfield Rd. Suite #7, Scottsdale, AZ 85260

Tel: [phone] Fax: [phone]

Web: www.sperscientific.com

2

TABLE OF CONTENTS

INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . .

FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . .

POWER SUPPLY . . . . . . . . . . . . . . . . . . . . . . .

METER COMPONENTS . . . . . . . . . . . . . . . . . .

LCD DISPLAY. . . . . . . . . . . . . . . . . . . . . . . . . . .

KEYPAD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

REAR PANEL. . . . . . . . . . . . . . . . . . . . . . . . . . .

SETUP MODE. . . . . . . . . . . . . . . . . . . . . . . . . ..

Memory Transmission . . . . . . . . . . . . . . . . .

Clear Memory . . . . . . . . . . . . . . . . . . . . . . .

View Slope & Offset (pH Probe) . . . . . . . . .

Calibration Review (Cond. Probe) . . . . . . . .

6

7

8

9

12

13

14

15-28

15

16

18

19

pH Calibration Buffer (pH Probe). . . . . . . . .

Select Buffer . . . . . . . . . . . . . . . . . . . . . . . . .

Cell Constant (Cond. Probe). . . . . . . . . . . . .

Temperature Setting (Cond. Probe) . . . . . . .

Ready Icon. . . . . . . . . . . . . . . . . . . . . . . . .

Temperature Units . . . . . . . . . . . . . . . . . . . .

Real Time Clock Setting . . . . . . . . . . . . . . .

Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3

20

21

22

23

25

26

26

27

TABLE OF CONTENTS

PH PROBE CALIBRATION. . . . . . . . . . . . . . . . . . . .

CONDUCTIVITY PROBE CALIBRATION. . . . . . . . .

TDS CALIBRATION. . . . . . . . . . . . . . . . . . . . . . . . .

SALT CALIBRATION. . . . . . . . . . . . . . . . . . . . . . . . .

MEASUREMENT PROCEDURES . . . . . . . . . . . . .

Preparing for Measurement. . . . . . . . . . . . . . . .

Hold Function . . . . . . . . . . . . . . . . . . . . . . . . . . .

pH Measurement . . . . . . . . . . . . . . . . . . . . . . . .

mV Measurement (± 499 mV) . . . . . . . . . . . . . .

ORP (mV) Measurement (± 1999 mV). . . . . . . .

Conductivity Measurement. . . . . . . . . . . . . . . .

Total Dissolved Solid Measurement. . . . . . . . . . .

29

31

36

37

38-49

38

39

39

40

41

42

43

Salinity Measurement . . . . . . . . . . . . . . . . . . . . .

Automatic Temperature Compensation. . . . . . . .

Manual Temperature Compensation. . . . . . . . . .

Auto and Manual Range . . . . . . . . . . . . . . . . . . .

Record Memory. . . . . . . . . . . . . . . . . . . . . . . . . .

Recall Memory. . . . . . . . . . . . . . . . . . . . . . . . . .

Recall Maximum & Minimum . . . . . . . . . . . . . . . .

MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . .

4

44

45

45

46

47

48

49

50

55

TABLE OF CONTENTS

ERROR CODES . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PC CONNECTION . . . . . . . . . . . . . . . . . . . . . . . . . .

APPENDICES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

OPTIONAL ACCESSORIES . . . . . . . . . . . . . . . . . . .

SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . .

WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

56

57

61

65

67

72

5

INTRODUCTION

Sper Scientific is pleased to offer the following line of bench

-top meters:

Model 860031 (pH/mV)
Model 860032 (Conductivity/TDS/Salinity)
Model 860033 (Water Quality)

Please note that the meter itself is identical in each of the
above models. Each model can be used for pH/mV,
Conductivity/TDS/Salinity or Water Quality depending on
the probe used.

To utilize your meter under additional parameters, please
refer to the list of probes in OPTIONAL ACCESSORIES on
page 65.

Instructions for all three models are contained within this
manual. Refer to the TABLE OF CONTENTS for the
subsection within MEASUREMENT PROCEDURES that
corresponds to the particular parameter you are measuring.

6

FEATURES

 Multi-display LCD screen

 Automatic buffer recognition

 5 point pH calibration

 Hold function

 Maximum and minimum

 Reliable, replaceable probe with temperature

compensation

 Easy to view probe calibration data

 “Ready” icon on LCD display indicates stability for

reading

 PC connection for online logging and uploading 99

memories for analysis

 Automatic or manual temperature compensation

 Analog output for chart recorders

7

POWER SUPPLY

The meter is powered by a 9 Volt DC adapter (included).
The plug of the adaptor is USA type; you will need to
purchase a plug converter if using the meter outside of the
US.

Plug the adaptor into the power port labeled “DC,” located
on the rear of the meter.

8

METER COMPONENTS

Meter Drawer

A built-in drawer is located on the bottom of the bench-top
meter. Pull the drawer out and use to store notes and other
important reference data.

Probe Holder

The probe holder is composed of two parts: the base and
arm. Holder assembly does not require tools. The max­imum swing angle is 70° and the maximum height of the
holder is 378 mm.

Holder Assembly

9

METER COMPONENTS

Holder Disassembly

1. Turn the base upside down.

2. Use a cylindrical object with an approximate 12 mm
diameter to push the arm out of the base.

Attaching Holder to the Meter

After assembling the holder, attach the holder to the meter.

1. Find the two holes on the bottom of the meter that are
used to hold the base.

2. The holder can be attached to the right or left side of the
meter.

10

METER COMPONENTS

Locate the two holes at the
bottom of the meter.

The cylindrical knob
on the holder base is
designed to fit into the
hole on the bottom of
the meter.

The holder can hold up to 4
probes. The wire of the probe can
be fixed to the arm.

Turn clockwise to lock the holder
into place. Turn counterclockwise
to adjust the holder up and down.

11

LCD DISPLAY

Primary Data Screen displays pH, mV, ORP, Conductivity,
TDS or Salinity value.

Icons CON, TDS, SALT, ORP, pH, mV indicate the
parameter displayed.

Icons ppt, ppm, mg/l, mS, µS, kPA, or mmHg indicate the
unit of measure displayed.

READY indicates the reading is stable.

AUTO indicates auto-ranging function.

MAX, MIN indicate a maximum or minimum memory value.

HLD Holds the current reading on the display.

REC indicates the meter is in recall mode.
MEM indicates the current measured value is saved.

The digital number under MEM indicates the total number
of saved records.

The are real time Y-M-D (Year-Month-Date) or

H:M:S (Hour-Minute-Second).

ATC indicates the meter is in Automatic Temperature

Compensation Mode.

The temperature display is indicated at the bottom of the
LCD. Temperature unit °C or °F is selectable.

12

KEYPAD

POWER/SET

CAL/ESC

HLD/REC

MODE/▲

MEMO/▼

Press to turn the meter on/off. Press
and hold for more than 1 second to
enter SET Mode. The meter will default
to the last mode used when turned off
and back on.

Switch between NORMAL and
CALIBRATION Mode. Press to enter
manual temperature setting. In
Calibration, Setting or Recall Modes,
press to return to Normal Mode.

Press to freeze the reading.
Press again to release.
Press for more than 1 second to switch
between NORMAL and RECALL
Modes.

Press to switch the mode.
Press to increase the setting value.

Press to save the current reading.
Press to decrease the setting value.

MN/MX/
CONFIRM

Press to confirm calibration or
parameter setting.
Press to view the min/max of
the memory in Recall Mode.
Press to select AUTO or Manual
ranging when in Cond./TDS/SALT.

13

REAR PANEL

The bench-top meter provides a complete set of input
connectors for various commonly-used accessories:

Connection Function

DC Connection of the AC to DC adaptor

power supply

RS232 Connection of a RS232 or USB cable to

a computer to capture online or stored
data

MIC Conductivity probe input

GND (I)

GND (II)

ANALOG Strip chart recorders input. Use

BNC

ATC Phone jack input for the temperature

Earth ground jack inputs (standard tip
connectors)

subminiature plug with positive tip.

The port accepts pH, ORP with a BNC
connector. Ensure that the connector
is clean and dry before connecting.

probe for automatic temperature
compensation

14

SETUP MODE

The advanced Setup Mode allows you to customize the
following meter preferences and defaults:

 Memory Transmission

 Clear Memory

 Slope and Offset (pH) or Calibration Review

(Conductivity)

 Buffer Solution (pH) or Cell Constant (Conductivity)

 Temperature Setting (pH)

 Ready Function

 Temperature Units

 Real Time Clock

 Reset

To enter Setup Mode, press SET for more than 2 seconds
while the meter is in Normal Mode.

Note...

To exit Setup Mode without saving, press ESC until Normal
Mode appears. If the meter is in Setup Mode, press ESC
twice to exit. For Conductivity, pH, and mV default settings,
refer to pages 70-71.

Memory Transmission

To transfer stored data from the meter to the computer:

1. Connect a RS232 or USB cable to the rear of the meter,
then connect the other end of the cable with the D-sub
connector to the computer’s serial port. Run the

15

SETUP MODE

software associated with this feature.

2. Press SET for 2 seconds to enter setup. “TR” appears
on the middle of the LCD display and P1.0 appears
under “TR.”

3. Press . “OUT” flashes on the upper display and
P1.1 appears under “OUT.” This indicates that mem­ories are transferring. After transmission, the LCD will
return to P1.0.

Note..

The meter can store up to 99 records for each parameter.
If you want to transmit data for a different parameter, press

MODE to select your parameter before entering setup.

Clear Memory

1. Press MODE to select the parameter you want cleared
before entering Setup Mode.

2. Press SET for 2 seconds to enter setup. Press ▲ to
select the memory clear function.

3. “CLR” appears on the middle display with P2.0 in the
lower display.

16

SETUP MODE

4. Press to enter step P2.1. The default “NO” icon
flashes on the middle display and P2.1 appears in the
lower display.

5. Press ▲ to change the status from “NO” on the display
to “YES” and then press again to confirm clear
memory. The LCD will return to P2.0 when all mem­ories are deleted.

CAUTION:

THE MEMORY CLEAR PROGRAM IS DESIGNED TO
CLEAR 99 MEMORIES AT ONE TIME. PLEASE
CAREFULLY CONSIDER IF YOU WANT TO CLEAR THE
MEMORY AS THIS OPERATION CANNOT BE
REVERSED.

17

SETUP MODE

View Slope & Offset (pH Probe)

1. Press MODE to select the probe type as pH.

2. Press SET for 2 seconds to enter setup.

3. Press ▲ until “ELE” appears in the middle display and
P3.0 appears in the lower display.

4. Press
four available slope values; P3.1, P3.2, P3.3, P3.4. If
the value is less than 75% or more than 115%, change
the probe immediately.

5. Press to enter P3.2, P3.3, and P3.4.

Note...

The solution range differs between NIST and Custom
buffers.

to enter P3.1, the LCD displays one of

18

SETUP MODE

6. Press to enter P3.5 and view the offset value. The
offset value is the mV value of pH 7 (default 0.0). The
offset value will be different after calibration. If the value
is outside the range of ± 60 mV, replace the probe.

Calibration Review (Conductivity Probe)

This feature allows you to review which range has been cal­ibrated and the last calibration value. The program re­views the probe calibration data of Conductivity, TDS or
SALT.

Note…
If the range is not yet calibrated, the LCD will display the
default value. There are 5 total calibration ranges for
Conductivity, TDS and SALT.

Range 1~3: Conductivity or TDS value
Range 4~5: Conductivity, TDS or SALT value

1. Press MODE to select the probe program.

2. Press SET for 2 seconds to enter setup.

3. Press ▲ to select CAL. “CAL” appears on the middle of
the LCD and P3.0 appears on the lower portion.

19

SETUP MODE

4. Press to enter P3.1. Press to enter P3.2,
P3.3, P3.4, P3.5.

5. Press ESC to return to P3.0.

6. Press ESC to return to Normal Mode.

The default values are:

pH Calibration Buffer (pH Probe)

This meter allows the selection of two different types of pH
buffers: NIST or CUSTOM. Selection of the proper buffer
more accurately calibrates the probe to specific
requirements.

NIST buffer: (five settings)

pH 1.68, 4.01, 6.86, 9.18, 12.45

CUSTOM buffer: (five ranges)

pH 1.00~3.00, 3.50~5.50, 6.00~8.00, 8.50~10.50,

11.50~13.50

20

SETUP MODE

Select Buffer

1. Press SET for 2 seconds to enter setup.

2. Press ▲ to select pH buffer. “BUF” appears on the
middle of the LCD and P4.0 appears on the lower
portion.

3. Press to enter P4.1. The default “NIST” will
flash on the LCD and P4.1 will appear on the lower
portion of the display. If you use NIST buffers, press
to confirm and the meter returns to P4.0.

4. If your requirement is not for NIST buffers, press ▲ to
change the status to CUSTOM buffer.

5. Press to confirm and the meter will return to P4.0.

21

SETUP MODE

6. Press ESC to return to Normal Mode.

Cell Constant (Conductivity Probe)

To view the probe data (cell constant) of each range:

Note…

If the range is not yet calibrated, the LCD will display the
default value (1.000).

1. Press MODE to select the probe program.

2. Press SET for 2 seconds to enter setup.

3. Press ▲ to select CELL. “CELL” will appear on the
middle of the LCD and P4.0 will appear on the lower
portion.

4. Press to enter P4.1. Press to enter P4.2,
P4.3, P4.4, P4.5.

Note…

Cell constant may degrade with time and usage.

22

SETUP MODE

Temperature Setting (Conductivity Probe)

Use this program to set the temperature parameters and
TDS conversion factors.

1. Press MODE to select the probe program.

2. Press SET for 2 seconds to enter setup.

3. Press ▲ to select COEF. “COEF” will appear on the
middle of the LCD and P5.0 will appear on the lower
portion.

4. Press to enter P5.1. The default “Auto” flashes on
the middle of the LCD and P5.1 will appear on the lower
portion. To switch to manual temperature compensation
mode, press ▲ to change the status, then press to
confirm and enter P5.2.

5. The default “2.1” flashes on the middle of the LCD and

23

SETUP MODE

P5.2 will appear on the lower portion.

6. To adjust the temperature coefficient from 2.1, press ▲
or ▼. Press to confirm and enter P5.3.

Note…

When using Manual Temperature Compensation Mode
(MTC), you must set the temperature solution in P5.3.

7. At P5.1, press twice to enter P5.3. The default
“25.0” flashes on the middle of the LCD and P5.3 will
appear on the lower portion. To adjust the solution
temperature setting, press ▲ or ▼.

8. Press to confirm and enter P5.4.

Note…
When using the TDS measurement mode, you must set
the TDS conversion factor in P5.4.

9. At P5.1, press three times to enter P5.4. The

default “0.500” flashes on the middle of the LCD and
P5.4 will appear on the lower portion. If the TDS
conversion factor of the solution is not 0.5, press ▲ or

24

SETUP MODE

▼ to adjust the value. Press to confirm and return
to P5.0.

Ready Icon

This feature enables/disables the “READY” icon, which
indicates that the measured reading is stable.

1. Press SET for 2 seconds to enter setup.

2. Press ▲ to select “READY” on the display. P6.0 will

appear on the lower display.

3. Press to enter P6.1. “YES” will flash on the LCD
display and P6.1 will appear on the lower display.

4. Press ▲ to switch between YES or NO.

5. Press to confirm and return to P6.0.

6. Press ESC to return to Normal Mode.

25

SETUP MODE

Temperature Units

To select either Celsius or Fahrenheit temperature scale:

1. Press SET for 2 seconds to enter setup.

2. Press ▲ to select “unit” on the upper display. P7.0 will
appear in the lower portion of the display.

3. Press to enter P7.1. The last selected unit “C” or
“F” will appear on the LCD.

4. Press ▲ to select either display.

5. Press to save the selection and return to P7.0.

6. Press ESC to return to Normal Mode.

Real Time Clock Setting

This procedure adjusts the meter’s internal clock. An
internal battery powers the real time clock independent of
the meter’s power source.

1. Press SET for 2 seconds to enter setup.

2. Press ▲ to select “rtc” on the LCD display. P8.0 appears

26

SETUP MODE

on the lower display.

3. Press to enter P8.1. The year flashes in the lower
left corner of the LCD display. (The year is the last two
digits only; for example, 1999 would be 99).

Symbol: Y-M-D H:M:S
Definition: Yr.-Mo.-Day Hr.-Min.-Sec.
Range: 99-12-31 23-59-59

4. Press to step through the following “P’s.” All are

two digits.

P8.1 = Year P8.2 = Month P8.3 = Day
P8.4 = Hour P8.5 = Minute P8.6 = Seconds

5. Press ▲ and ▼ to adjust values up or down,
respectively.

6. Press ESC to return to P8.0.

7. Press ESC to return to Normal Mode.

Reset

This procedure will reset the meter to factory default
settings. Memory locations are not reset after this
procedure.

1. Press MODE continuously until you reach the mode that
you want to reset. When resetting pH/mV, only pH and
mV will revert to the default values. The COND/TDS/
SALT parameters will not be reset unless you select the

27

SETUP MODE

mode as COND/TDS/SALT. Refer to pages 70-71 for

default values of each parameter.

1. Press SET for 2 seconds to enter setup.

2. Press ▲ to select the reset section of the meter.

3. “rSt” will appear on the LCD and P9.0 will appear
directly below.

4. Press to enter P9.1.

5. Press ▲ to switch between “YES” or “NO.”

6. Press to confirm and return to P9.0.

7. Press ESC to return to Normal Mode.

28

PH PROBE CALIBRATION

Calibration is necessary before measurement. For the
highest accuracy, we recommend a two point calibration. If
only calibrating at a single point, make certain that the
buffer value is close to that of the sample being measured
and that the buffer temperature remains stable.

1. Press POWER to turn the meter on and press MODE
continuously to select pH.

2. Rinse the probe in de-ionized water or rinse solution.
Shake and air dry but DO NOT wipe the pH probe dry.
Wiping the probe may cause static and cause calibration
and measurement instability.

3. Select the pH buffer and pour solution (a sufficient
amount to totally immerse the probe tip) into a clean
container.

4. Dip the probe into the container, immersing the probe
tip.

5. Stir the probe gently to create a uniform sample.

6. Press CAL to enter calibration mode. “CAL” will flash on
the lower left of the LCD.

Note…
The main display indicates the measured value, and the
secondary display value indicates the desired value
according to the buffer type selected (NIST or CUSTOM).
Refer to CALIBRATION BUFFER page 20.

29

PH PROBE CALIBRATION

7. If NIST is selected, the lower display indicates the value
of the solution at the current temperature.

Note...

If this secondary value continues to fluctuate, check the
buffer or probe. (Refer to TROUBLESHOOTING page 55).
If CUST is selected, the lower middle display indicates the
default, 2.00. Press HLD to select the buffer range needed.
Press ▲ or ▼ to adjust the lower middle display to coincide
with the main display reading.

8. When the measured pH value is stable and the Ready
function is enabled (Refer to P6.0 READY ICON page

25), “READY” will appear on the left side of the LCD.
Press to confirm.

9. Change the buffer solution and repeat the previous
steps to achieve multiple point calibration. Clean the
probe in between each buffer.

10. Press ESC to return to Normal Mode.

30

CONDUCTIVITY PROBE CALIBRATION

Selecting Calibration Standard Solution

For best results, select a conductivity, TDS or NaCl
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 uS range, use 1413 uS
solution for calibration.

DO NOT reuse the calibration solution. Contaminants in
the solution will affect the calibration and the accuracy. Use
fresh solution each time.

Refer to the table below. For best results, use the
recommended solution for various conductivity and TDS
ranges.

Conductivity

Measuring

Range

1 0 ~ 19.99 uS 6.00 ~ 17.00 uS

2 0 ~ 199.9 uS 60.0 ~ 170.0 uS

3 0 ~ 1999 uS 600 ~ 1700 uS

4 0 ~ 19.99 mS 6.00 ~ 17.00 mS

5 0 ~ 199.9 mS 60.0 ~ 170.0 mS

Recommended

Cal. Solution

Range

TDS Measuring

Range

(factor=0.5)

1 0.00 ~ 9.99 ppm 3.00 ~ 8.50 ppm

2 0.0 ~ 99.9 ppm 30.0 ~ 85.0 ppm

3 0 ~ 999 ppm 300 ~ 850 ppm

4 0.00 ~ 9.99 ppt 3.0 ~ 8.50 ppt

5 0.0 ~ 199.9 ppt 30.0 ~ 85.0 ppt

Recommended

Cal. Solution

Range

The previous calibration data will be replaced after re

-calibrating. For example, if you previously calibrated the

conductivity meter at 1413 uS in the 0 ~ 1999 uS range,
when you re-calibrate at 1500 uS again (also in the 0 ~

31

CONDUCTIVITY PROBE CALIBRATION

1999 range), the previous 1413 uS calibration point will be
replaced in this range (0 ~ 1999 uS). However, the meter
will retain the calibration data for other ranges that have not
yet been calibrated.

Note…
The temperature coefficient of the meter defaults to 2.1%
per °C and provides good results for most applications. To
reset the coefficient, see P5.2 on page 23.

Selecting Calibration Schedule

For first use and best results, use solution to calibrate.

If the conductivity of the measured solution is < 100 µS or
the TDS is < 50 ppm, calibrate the meter weekly to achieve
the specified accuracy.

If the meter is used in the mid ranges, calibrate the unit
monthly.

If the measurement is performed at extreme temperatures,
calibrate the unit weekly.

To Calibrate:

1. Insert 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 31.)

3. Pour 4 cm (deep) of buffer solution into two separate
containers (A & B).

32

CONDUCTIVITY PROBE CALIBRATION

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

5. 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.

A (Step 4) B (Step 5)

6. Turn the meter on. In Normal Mode, press MODE
continuously to select the mode as CON.

7. Press CAL to enter Calibration Mode. The probe au-
tomatically detects the conductivity value of the
solution. The value will flash on the LCD.

8. Wait for the measured conductivity value to stabilize. If
you have enabled the Ready function in P6.0, the ready
icon will appear on the upper left corner of the LCD
when the calibration is stable.

9. Press ▲ or ▼ to adjust the value on the primary display
to match the value of the standard buffer. There are two
options:

 To input the value based on current temperature, the

Temperature Coefficient (page 23) must be 0.0.

 To input the value based on 25°C, refer to APPENDIX C

on page 62 to select the temperature coefficient value.

33

CONDUCTIVITY PROBE CALIBRATION

Note…

You can adjust the conductivity reading ± 20% from the
measured value. If the detected value and the standard
value differ by more than ± 20%, clean or replace the
probe.

Example:
Standard: 10uS; Detected value: 19 uS
Adjustable range: ± 3.8 uS (19*20%)
However, under the above situation, the values already
differed over 20%.

Note…
When the calibration is stable, “READY” will appear on the
LCD. If “READY” does not appear, check that the
calibration solutions and input value (Step 9, page 33) are
correct and that the ready icon is enabled (page 25).

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. Under this condition, go to the
parameter setting first to manually select a suitable range
(see page 46).

Example 1:
Standard: 22 uS; Detected value: 19 uS
Adjustable range: ± 3.8 uS (19*20%)
Although the values differ less than 20%, the 22 uS is still
over the range limit (because the maximum input value is

19.99 uS). In this instance, you must manually select the

range as 0~199.9 uS and then adjust the value to 22 uS.

34

CONDUCTIVITY PROBE CALIBRATION

Example 2:
Standard: 1.6 uS; Detected value: 2.1 uS
Adjustable range: ± 0.42 uS (2.1*20)
Although the measured value differs less than 20%, the 1.6
uS is still less than the 10% range limit (19.99*10%).
Therefore, the maximum input value is 2.00 uS.

35

TDS CALIBRATION

There are two options for TDS calibration:

Option 1: Using TDS Standards

The procedure for TDS calibration is almost the same as
the procedure for conductivity calibration. Differences are
as follows:

1. Select the TDS standard for calibration. The default TDS
conversion factor is 0.50. If your solution has a different
TDS factor, you can improve the calibration accuracy by
setting the TDS factor before starting the calibration. To
set the TDS factor for the correct value, refer to the val­ue provided by the standard solution manufacturer or
see Appendix A (page 61).

2. In Measurement Mode, press MODE to select TDS and
press CAL to enter Calibration Mode.

Option 2: Using Conversion Factors

TDS values are related to conductivity. You can calibrate
the meter by using the conductivity standards above and
then program the meter with a given conversion factor.

1. Perform the conductivity calibration procedure (page

31).

2. Select the correct conductivity-to-TDS conversion factor.
Refer to Appendix A (page 61) or calculate the TDS
conversion factor for other solutions using the formula
shown in Appendix B (page 61).

3. Refer to P5.4 (page 24) for the procedure to set the TDS
conversion factor.

36

SALINITY CALIBRATION

The procedure for salinity calibration is almost the same as
the procedure for conductivity calibration. Differences are
as follows:

1. In Measurement Mode, press MODE to select the mode
as SALT and press CAL to enter Calibration Mode.

2. There are two measuring ranges for salinity: 0 to 11.38
ppt and 0 to 80.0 ppt. Please select a NaCl standard
that is near the sample value you are measuring.

37

MEASUREMENT PROCEDURES

Preparing for Measurement

1. Assemble the probe holder and attach the holder to the
meter (pages 9-10).

2. Connect an adaptor to the power jack. Slide the adaptor
jack into the meter, making sure it is firmly in place.
(The meter’s voltage is 9V.)

3. For pH and ORP measurements, connect a sensor
probe to the BNC port. For conductivity, TDS and
salinity measurements, connect a sensor probe to the
MIC port.

4. For a pH probe with a temperature sensor, connect a
temperature sensor connector to the ATC port.

5. Connect a USB or RS232 cable to the meter and your
computer to upload real time measurement values and
memories for further analysis (page 57).

6. Connect your chart recorder or other data collection
devices to the ANALOG port as needed.

Available measurement parameters for each probe type:

pH mV/ORP Cond. TDS Salinity

pH Probe

Cond. Probe

ORP Probe

• •

• • •

•

38

MEASUREMENT PROCEDURES

IMPORTANT: The temperature of the measured liquid

must be stable. pH and conductivity probes CANNOT be
placed in the same container while taking measurements.

Hold Function

This function allows you to freeze current readings on the
display in Normal Mode.

1. Press POWER to turn the meter on.

2. Press HLD while in Normal Mode. “HOLD” appears on
the display.

3. To release the Hold function, press HLD again.

pH Measurement

pH measurement range is 0 ~ 14 pH.

This meter is designed to take readings with automatic or
manual temperature compensation. Automatic temperature
compensation only occurs when a temperature sensor is
plugged into the meter. For manual temperature
compensation, the default setting is 25°C. It is also
possible to manually adjust the temperature to match your
working conditions (as measured by a separate
thermometer). To take measurements:

1. Remove the pH probe soaker bottle by rotating the
bottle and cap and slide the bottle and cap off the probe.
Rinse the probe tip with de-ionized or distilled water
before use. If the probe tip is dehydrated, soak it for 30

39

MEASUREMENT PROCEDURES

minutes in a KCl solution. DO NOT wipe the pH probe

dry. Wiping the probe may cause static and cause
calibration and measurement instability.

2. Press POWER to turn the meter on. ATC appears on
the LCD to indicate that the automatic temperature
compensation probe is connected and working properly.

3. Immerse the probe tip (glass bulb) completely into the
sample.

4. Stir the probe gently to create a uniform sample.

5. Wait until the reading has stabilized. If enabled in setup,
“READY” will illuminate to indicate a stable reading.

6. Press MODE to switch between mV and pH.

mV Measurement (± 499 mV)

mV measurement range is from -499 mV to +499 mV with a
pH probe.

1. Follow Step 1 in the pH Measurement section (page 39)
to clean and soak the probe.

2. Press POWER to turn the meter on. Press MODE to
select mV mode.

40

MEASUREMENT PROCEDURES

3. Follow Steps 3-5 in the pH Measurement section (page

40) to obtain a reading.

4. Press MODE to switch between mV and pH.

ORP (mV) Measurement (± 1999 mV)

Oxidation Reduction Potential (ORP) measurement range is

-1999 mV to +1999 mV. Use an ORP probe for

measurement:

1. Follow Step 1 in the pH Measurement section (page 39)
to clean and soak the probe.

2. Press POWER to turn the meter on. Press MODE to
select mV measurement.

3. Follow Steps 3-5 in the pH Measurement section (page

40) to obtain a reading.

Note...

There is no need to take temperature compensation into
consideration when measuring ORP.

41

MEASUREMENT PROCEDURES

Conductivity Measurement

The conductivity probe measures 0 ~ 19.99 uS/cm, 0 ~

199.9 uS/cm, 0 ~ 1999 uS/cm, 0 ~ 19.99 mS/cm, 0 ~ 199.9

mS/cm. In Normal Mode, the ATC indicator appears in the
lower right corner of the LCD to indicate Automatic
Temperature Compensation. If you select MTC, the ATC
indicator will disappear. When selecting MTC, you must
first deactivate ATC in P5.1 (page 23) and then set a MTC
value in P5.3 (page 24).

Before measuring, remove the probe cover if needed. To
measure:

1. Rinse the probe with de-ionized or distilled water.

2. Press POWER to turn the meter on. Press MODE to
select CON measurement. Before measuring, set the
temperature coefficient (P5.4 on page 24).

Note…
Reference temperature or Tref (page 63) of the meter is set
at 25°C and CANNOT be adjusted.

3. Immerse the probe tip (glass bulb) completely into the
sample.

4. Stir the probe gently to create a uniform sample.

5. Wait until the reading has stabilized. If enabled in setup,
“READY” will illuminate to indicate a stable reading.

42

MEASUREMENT PROCEDURES

6. Press MODE to switch between CON and TDS/SALT.

Total Dissolved Solid Measurement

TDS readings display ppm or ppt on the LCD. The ATC
indicator appears in the lower right corner of the LCD to
indicate Automatic Temperature Compensation. If you
select MTC, the ATC indicator will disappear. When
selecting MTC, you must first deactivate ATC in P5.1 (page

23) and then set a MTC value in P5.3 (page 24).

Before measuring, remove the probe cover if needed. The
conductivity probe measures 0.00 ~ 9.99 ppm, 0.0 ~ 99.9
ppm, 0 ~ 999 ppm. To measure:

1. Rinse the probe with de-ionized or distilled water.

2. Press POWER to turn the meter on. Press MODE to
select TDS measurement. Before measuring, set the
temperature coefficient (P5.2 on page 23) and TDS
conversion factor (P5.4 on page 24).

Note…
Tref (page 63) of the meter is set at 25°C and CANNOT be
adjusted.

3. Immerse the probe tip (glass bulb) completely into the
sample.

4. Stir the probe gently to create a uniform sample.

5. Wait until the reading has stabilized. If enabled in setup,
“READY” will illuminate to indicate a stable reading.

43

MEASUREMENT PROCEDURES

6. Press MODE to switch between TDS and CON/SALT.

Salinity Measurement

Use a conductivity probe to measure salinity range: 0 ~ 80
ppt (NaCl) with temperature compensations and
temperature coefficient settings.

Before measuring, remove the probe cover if needed. To
measure:

1. Rinse the probe with de-ionized or distilled water.

2. Press POWER to turn the meter on. Press MODE to
select salinity measurement.

3. Immerse the probe tip (glass bulb) completely into the
sample.

4. Stir the probe gently to create a uniform sample.

5. Wait until the reading has stabilized. If enabled in setup,
“READY” will illuminate to indicate a stable reading.

6. Press MODE to switch between SALT and CON/TDS.

44

MEASUREMENT PROCEDURES

Note…

pH and conductivity probes CANNOT be placed in the
same container while taking measurements.

Improper measurement procedure Proper measurement procedure

Automatic Temperature Compensation

pH Probe
Plug the temperature connector sensor into the ATC port at
the rear of the meter.

Conductivity Probe
The temperature sensor is built into the conductivity probe.
Plug the probe only into the MIC port at the rear of the
meter.

Manual Temperature Compensation

pH Probe

1. Disconnect the temperature connector from the rear of
the meter.

45

MEASUREMENT PROCEDURES

2. Press MODE to select pH Mode.

3. To set the temperature, press for more than 1
second. “CAL” will flash on the LCD.

4. Press ▲ or ▼ to change the temperature value. Press

to save and return to Normal Mode.

Conductivity Probe
The temperature sensor is built into the conductivity probe.
Follow the manual temperature setting procedures in P5.1
and P5.3 (pages 23-25) to set the temperature.

Note...

There is no need to take temperature compensation into
consideration when measuring ORP.

Auto and Manual Range

Press while in Normal Mode to select automatic or
manual range function.

Mode CON TDS SALT
Auto Full range Full range Full range
Range 1 0 ~ 19.99 uS 0 ~ 19.99*f ppm
Range 2 0 ~ 199.9 uS 0 ~ 199.9*f ppm
Range 3 0 ~ 1999 uS 0 ~ 1999*f ppm
Range 4 0 ~ 19.99 mS 0 ~ 19.99*f ppt 0 ~ 11.38 ppt
Range 5 0 ~ 199.9 mS 0 ~ 199.9*f ppt 0 ~ 80.0 ppt

Note…
“f” stands for TDS conversion factor.

Normally, the meter will automatically select a range while
taking readings. To select a specific range (or

46

MEASUREMENT PROCEDURES

correspondent resolution):

1. While in Normal Mode, press to select the range
setting.

2. If you select automatic range setting, “AUTO” appears
on the upper left corner of the LCD.

3. When in manual range mode, E03 will appear on the
LCD when the measured value is out of range. Select
another range.

4. The meter will return to auto range when it is turned off.

Record Memory

The meter can store up to 99 records each of pH, mV, and
ORP (mV), conductivity, TDS and salinity readings.

1. In any measurement or Hold Mode, press MEMO to
save the data.

47

MEASUREMENT PROCEDURES

2. “MEM” will appear on the LCD. The memory number
and measured value will flash and the meter will return
to Normal Mode.

Note…

Further data can not be saved once the memory is full. See
Clear Memory (page 16) to create additional space.

Recall Memory

This function recalls readings stored in the memory.

1. Press REC for more than 2 seconds to enter Recall
Mode. “REC” will flash on the LCD display.

2. Press ▲ to select the next memory content. Press ▼ to
select the previous memory.

3. Press REC for more than 2 seconds to exit memory
recall and return to Normal Mode.

Note…

All records are retained even when the meter is off. To
clear records, see page 16.

48

MEASUREMENT PROCEDURES

Recall Maximum & Minimum

This function reviews a maximum and minimum value
for all the data points stored in the memory.

1. Press REC for 2 seconds to enter Recall Mode. “REC”
will flash on the LCD.

2. Press MN/MX to view the minimum value of the
memory. Press MN/MX again to view the maximum val­ue.

3. To exit memory recall, press REC for more than 2 se­conds and return to Normal Mode.

Note…

All records are retained even when the meter is off. To
clear records, see page 16.

49

MAINTENANCE

pH Probe

It is important to keep the pH probe wet when not in use.
The probe is protected by a plastic bottle containing
solution. To use or store the probe:

1. Rotate the bottle to remove the bottle from the probe.
Pull down the cover and remove it from the probe.

2. After use, put the cover back on the probe and plug the
probe into the bottle. Rotate the bottle to fit into the cov­er tightly.

50

MAINTENANCE

The following actions will keep the probe in good working
condition:

 Always keep the pH glass bulb wet by using the plastic

bottle to protect and store the probe. You can also store
it in a KCl solution. Never use distilled or de-ionized
water for storage.

 Always rinse the pH probe in de-ionized water before

using.

 Never touch or rub the glass bulb tip.

 This probe is designed with a fiber junction. To prolong

the life of the probe, clean the probe monthly by
immersing it in a cleaning solution for a minimum of 30
minutes. After cleaning, rinse with tap water and
recalibrate with the meter.

 To further prolong the life of the probe, extend the fiber

junction and cut off the dirty, used portion. The
extendable fiber reference junction is used to eliminate
the reading errors from a clogged junction.

51

MAINTENANCE

To expose the new unused fiber portion:

1. Use tweezers to pull out the fiber junction and expose
the new unused portion.

2. Cut the clogged fiber and expose the new portion.

Conductivity Probe

Before using, soak the conductivity probe in distilled water
for 30 minutes. We recommend leaving the cover on the
probe but you may remove it before calibration and
measurement. If removing the cover, the probe must be
uncapped in Calibration and Measurement Modes.

52

MAINTENANCE

 Do NOT touch the surface of the conductivity probe’s

testing element with hard objects.

 Do NOT use anything to rub the platinum black surface

of the probe or the original constants will be changed
and the testing range will be affected.

 If the surface of the testing element becomes

contaminated, place the probe into diluted detergent or
diluted acid for about 15 minutes, then rinse the probe
with distilled water.

ORP Probe

Before using, remove the soaking bottle, soak the probe in
distilled water, and rinse. Gently dry the sensing el-

ement.

Probe Testing

1. Connect the ORP probe to the meter via the BNC
connector.

2. Put the probe in a buffer solution of pH 7.00 with sat­urated quinhydrone.

3. Stir; mV reading (E1) should be 86 ±15 mV.

4. Rinse the probe with distilled water, then set the probe
in pH 4.01 buffer solution with saturated quinhydrone.
After stabilizing, record the mV meter reading (E2). The
difference between E1 and E2 should be 165 mV.

5. Rinse the probe with distilled water between each use.
Keep the ORP probe wet. If not in use for long periods,

53

MAINTENANCE

the probe should be rinsed and stored in the soaker

bottle filled with the soaking solution.

ORP Probe Cleaning

A contaminated sensing element can result in a slow
response and/or inaccurate reading.

 If the contamination is mineral matter, put the sensing

element in a 0.1 N HCl solution for 10 minutes. Rinse in
distilled water.

 If the contamination is oil or grease, clean with a mild

detergent. Rinse in distilled water.

Upon completion of either cleaning method, immerse the
probe in a saturated buffer solution with pH 4.01 for 15
minutes and rinse with distilled water. After cleaning, soak
the probe in solution for at least 8 hours.

Probe Performance

The sensing element of an ORP probe is made of a high
purity metal. Soaking the sensing element in a solution for
a long period of time may cause slow response time and
inaccurate readings. An oxidation reduction coating may
have formed on the surface of the sensing element.
Resolve by cleaning the element.

When measuring a solution with a low concentration of
oxidation reduction matter and slow ion exchange rate, a
slow response time and inaccurate readings may occur.
Under these conditions, it may take 8-24 hours to obtain an
accurate reading.

54

TROUBLESHOOTING

Meter does not turn on:

1. Press POWER for more than 2 seconds.

2. Check the power adapter connection.

Unstable readings:

1. Stir the solution to make a uniform sample and make
sure the sensor is completely immersed in the solution.
The measurement must be done while the probe is in
the container/solution.

2. Clean and re-calibrate or replace with the probe.

3. Move to a new location for measurement, RF emissions
from unknown sources may disrupt readings.

Readings not changing:

1. Check to see if the meter is in Hold Mode.

2. Release the “HOLD” function.

3. Check to see if the meter is in “MTC,” if so, input the
temperature value.

Slow response:

1. Clean and re-calibrate or replace the probe.

Wrong real time:

Incorrect real time display will not affect the measurements.
The internal battery needs replacing. Contact Sper
Scientific for battery replacement procedures.

55

ERROR CODES

E02 Reading is under the lower range limit; See
page 67 for range specifications for all
parameters

E03 Reading is over the upper range limit; See
page 67 for range specifications for all
parameters

E04 Error in measuring original data (damaged
temperature sensor or temperature out of
specicifications) results in conductivity or pH
value error. E02 or E03 will also appear in the
temperature column. If E04 is caused by high
liquid temperature (E03), cool down the liquid
temperature.

E12 Factory calibration data error (pH); Restart
the meter

E13 Slope or Offset value of the pH probe is out of
range

E16 Factory calibration data error (conductivity);
Restart the meter

E17 Cell constant of the conductivity probe is out
of range; Restart the meter

E31 Measuring circuit failure; Restart the meter

E32 Memory Integrated Circuit failure

56

PC CONNECTION

The meter can interface with a personal computer to
capture on-line or stored data.

Connection procedures:

1. Plug a USB or RS232 cable into the jack labeled RS232
on the rear side of the meter.

2. Plug the D-sub 9 pin type connector into a computer
Serial COM port. COM ports 1-8 can be used.

3. Insert the CD-Rom into the computer and follow the
procedure in the operation manual located on the CD.

Protocol information

RS232 protocol settings: 9600 bps, 8 data bits, no parity.
(Transmits ASCII code every second.)

Normal Data:

pxx.xxpH: mxx.xxmV: Cxxxx(xx.xx, xxx.x)mS(uS) : Dxxxx
(xx.xx, xxx.x)ppm(ppt) : Sxx.xxppt:Txxx.xC(F):Txxx.xC(F)
@ 2007-04-18

18:48:48LRCCRLF

Protocol Information

Errors:

ExxNul: ExxNul: ExxNul: ExxNul: ExxNul: ExxNull: ExxNul
@ 2007-04-18

18:48:48LRCCRLF

Description:

$pH:mV:Cond:TDS:Salt:TpH:Tcon LRC CRLF

57

PC CONNECTION

Note...

The first value is the pH reading in pH, the second value is
the Voltage reading in mV, the third value is Conductivity in
mS/uS, the fourth value is TDS in ppm/ppt, the fifth value is
SALT in ppt, the sixth value is Temperature of the pH probe
in °C/°F, the seventh value is Temperature of the
conductivity probe in °C/°F. “x” means one of {0|1|2|...|9|-}

Format in Memory Transmit (pH Mode)

Normal Data:

pxx.xxpH: Txxx.xC(F) #xx @2007-04-18

18:48:48LRCCRLF

Errors:

ExxNul: ExxNul #xx @2007-04-18

18:48:48LRCCRLF

Description:

$pH: Temp LRC CRLF

Format in Memory Transmit (mV Mode)

Normal Data:

mxx.xxmV: Txxx.xC(F) #xx @2007-04-18

18:48:48LRCCRLF

Errors:

ExxNul: ExxNul #xx @2007-04-18

18:48:48LRCCRLF

58

PC CONNECTION

Description:

$mV:Temp LRC CRLF

Format in Memory Transmit (Conductivity Mode)

Normal Data:

Cxxxx(xx.xx, xxx.x)mS(uS) : Txxx.xC(F) #xx @2007-04-18

18:48:48LRCCRLF

Errors:

ExxNul: ExxNul #xx @2007-04-18

18:48:48LRCCRLF

Description:

$Cond: Temp LRC CRLF

Format in Memory Transmit (TDS Mode)

Normal Data:

Dxxxx(xx.xx, xxx.x)ppm(ppt) : Txxx.xC(F) #xx @2007-04-18

18:48:48LRCCRLF

Errors:

ExxNul: ExxNul #xx @2007-04-18

18:48:48LRCCRLF

Description:

$TDS: Temp LRC CRLF

59

PC CONNECTION

Format in Memory Transmit (Salt Mode)

Normal Data:

Sxx.x(xx.xx) ppt : Txxx.xC(F) #xx @2007-04-18

18:48:48LRCCRLF

Errors:

ExxNul: ExxNul #xx @2007-04-18

18:48:48LRCCRLF

Description:

$Salt: Temp LRC CRLF

60

APPENDICES

APPENDIX A:

CONDUCTIVITY to TDS CONVERSION FACTORS

Conductivity

at 25°C

1413 uS
2070 uS
2764 uS

8974 uS
12,880 uS
15,000 uS

80 mS

TDS KCl TDS NaCl TDS 442

ppm

value

744.7
1045
1382
5101
7447
8759

52,168

Factor ppm

value

0.527

0.5048

0.5

0.5685

0.5782

0.5839

0.6521

702.1
1041

1414.8
4487
7230
8532

48,384

Factor ppm

value

0.4969

0.5029

0.5119

0.5

0.5613

0.5688

0.6048

1000
1500

2062.7
7608

11,367
13,455
79,688

Factor

0.7078

0.7246

0.7463

0.8478

0.8825

0.897

0.9961

442 stands for:
40% sodium sulfate, 40% sodium bicarbonate and 20%
sodium chloride.

APPENDIX B:

CALCULATING TDS CONVERSION FACTORS

The meter can be calibrated using TDS calibration standard
solutions. The calibration standard requires the TDS value
at a standard temperature such as 25°C. To determine the
conductivity-to-TDS conversion factor, use the following
formula:

Factor=Actual TDS ÷ Actual Conductivity @ 25°C

Definitions:

Actual TDS: Value from the solution bottle label or from a
standard buffer, which is made using high purity water and
precisely weighted salts.

61

APPENDICES

Actual Conductivity: Value measured using a properly cal­ibrated Conductivity/TDS/Temperature meter.

Both the actual TDS and the actual conductivity values
must be in the same magnitude of units. For example, if
the TDS value is in 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 formula and the
result is the TDS in ppm.

APPENDIX C:

TEMPERATURE EFFECT

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 different temperatures. The
reference temperature is usually 20°C or 25°C. The meter
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 is the value taken at the measurement
temperature.

62

APPENDICES

Linear Temperature Correction

In moderately and highly conductive solutions, temperature
correction can be based on a linear equation involving a
temperature coefficient (θ). The coefficient is usually
expressed as a conductivity variation in %/°C. Linear
temperature correction is used for saline, acids, and
leaching solutions.

Where:
K

= Conductivity at Tref

Tref

KT = Conductivity at T (while Tc in P5.2 is set as 0.0, the
measured conductivity is KT)
T

= Reference temperature

ref

T = Sample temperature
θ = Temperature coefficient

Note…
The correction is accurate only within a limited temperature
range around T1 and T2. The greater the difference
between T and Tref, the higher the risk of error.

Calculating Temperature Coefficients (θ)

By measuring the conductivity of a sample at temperature
T1 close to Tref and another temperature T2, you can
calculate the temperature coefficient by using the following
equation:

63

APPENDICES

T2 should be selected as a typical sample temperature and
should be approximately 10°C different from T1. The
temperature coefficients of the following electrolytes
generally fall into the ranges show below:

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

Average temperature coefficients of standard electrolyte
solutions expressed as %/°C of the conductivity value at
25°C.

APPENDIX D:

TEMPERATURE EFFECT ON NIST pH BUFFERS

64

OPTIONAL ACCESSORIES

For 860031 (pH/mV)

840016 pH Probe (non-ATC)

840049 Spear Tip pH Probe (non-ATC)

850059P Replacement ATC pH Probe

850088 ORP Probe

860008 pH4, 3 bottles, 40mL each

860009 pH7, 3 bottles, 40mL each

860010 pH10, 3 bottles, 40mL each

860011 De-ionized Water, 3 bottles, 40mL each

For 860032 (Conductivity/TDS/Salinity)

850038P Replacement Conductivity/TDS/Salinity Probe

For 860033 (Water Quality)

840016 pH Probe (non-ATC)

840049 Spear Tip pH Probe (non-ATC)

850038P Replacement Conductivity/TDS/Salinity Probe

850059P Replacement ATC pH Probe

850088 ORP Probe

860008 pH4, 3 bottles, 40mL each

65

OPTIONAL ACCESSORIES

860009 pH7, 3 bottles, 40mL each

860010 pH10, 3 bottles, 40mL each

860011 De-ionized Water, 3 bottles, 40mL each

66

SPECIFICATIONS

Unit of

Measure

pH

ORP

Cond.

TDS

Range Resolution Accuracy

0 ~ 14 pH 0.01 pH ± 0.02 pH

-1999 ~1999 mV 0.1 mV
(-199.9 ~ 199.9

mV)

otherwise 1 mV

0 ~ 19.99 uS
0 ~ 199.9 uS
0 ~ 1999 uS
0 ~ 19.99 mS
0 ~ 199.9 mS

0 to (19.99*f) ppm
0 to (199.9*f) ppm

0 to (1999*f) ppm

0 to (19.99*f) ppt
0 to (199.9*f) ppt

f=TDS conversion

factor

0.01 uS

0.1 uS
1 uS

0.01 mS

0.1 mS

0.01 ppm

0.1 ppm
1 ppm

0.01 ppt

0.1 ppt

± 0.2 mV
(-199.9 ~

199.9 mv)

otherwise ± 2

mV

± (1% FS +

digit)

± (1% FS +

digit)

Salt

(Based on

NaCl)

0 ~ 11.38 ppt

0 ~ 80.0 ppt

67

0.01 ppt

0.1 ppt

± (1% FS +

digit)

SPECIFICATIONS

Unit of

Measure

pH

Cond.

TDS

ATC or

MTC

Yes Maximum 5

Yes Maximum 5

Yes Maximum 5

Calibration Calibration

points

automatic

buffer

recognition

points (one

point per

range)

points (one

point per

range)

Acceptable

Window

NIST: ± 1.25 at

6.86

CUSTOM: ± 1.00

± 20% of the

factory default

value and ≥

10% FS

± 20% of the

factory default

value and ≥

10% FS

Salt

(Based on

NaCl)

Adjust TDS

conversion

factor

Yes Maximum 2

points (one

point per

range)

68

SPECIFICATIONS

pH Slope/Offset display (pH Mode only)

Slope alarm Out of 75% to 115% (pH)

Offset alarm Out of ±60 mV (pH)

Conductivity cell constant 1.0 (Conductivity)

Conductivity Temperature 0.0% to 10.0%/°C (Conductivity)
Coefficient (Tc)

Reference temperature Factory set at 25°C
(Tref) (Conductivity)

TDS conversion factor 0.300 ~ 1.000 (TDS)
Non-linear compensation (Salt)

Operating temperature: 5°C to 40°C

Operating RH%: Up to 95% w/o condensation

Storage Temperature: -20°C to 60°C

Storage RH%: Up to 95% w/o condensation

Weight: 18 oz (533 g)

Dimensions: 8½” x 6½” x 2¼”
(217 x 168 x 58mm)

69

SPECIFICATIONS

Conductivity Default Settings

Program Function Default Display Note

P1.0
P1.1

P2.0
P2.1

P3.0
P3.1~3.5

P4.0
P4.1~4.5

P5.0
P5.1
P5.2
P5.3
P5.4

P6.0
P6.1

Memory transmitting
MEM sent by RS232

MEM clear
CLR confirm

CAL view
Cal solution value

CELL
Constant

Temp setting
ATC/MTC
Tc
M Temp
TDS Factor

Ready function
Enable or disable

No default “tr”

“out”

Always
defaults
“no”

14.13 uS,

141.3 uS,
1413 uS,

14.13 mS,

141.3 mS

1.000

ATC

2.1%
25°C

0.500

“yes”

“CLr”
“no” or
“yes”

“CAL”
Cond/
TDS/
SALT
solution
value

“CELL”

“COEF”
“Auto” or
“NAn”

“rdy”
“no” or
“yes”

Follow Cond
or TDS of
Normal Mode

Follow Cond
or TDS of
Normal Mode

Ra1~Ra5

Ra1~Ra5

0.0% ~ 10.0%

0.300 ~ 1.000

P7.0
P7.1

P8.0
P8.1~8.6

P9.0

P9.1

Temp unit
Select °C or °F

Real time clock
Setting YMD, HMS No default

RESET

Reset confirm

°C

Always
defaults
“no”

70

“U”
“C” or “F”

“rtc”
“rtc”

“rSt”

“no” or
“yes”

Cond/TDS/
SALT
reset

SPECIFICATIONS

pH/mV Default Settings

Program Function Default Display Note

P1.0
P1.1

P2.0
P2.1

P3.0
P3.1~3.4

P3.5

P4.0
P4.1-4.5

P6.0
P6.1

P7.0
P7.1

Memory transmitting
MEM sent by RS232 No default

MEM clear
CLR confirm

Electrode
Slope

Offset

Buffer solution
Select buffer

Ready function
Enable or disable

Temp unit
Select °C or °F

Always
defaults
“no”

100.0%

0.0 mV

“NIST”

“yes”

°C

“tr”
“out”

“CLr”
“no” or
“yes”

“ELE”
Slope val­ue
Offset val­ue

“buF”
“NISt” or
CUSt”

“rdy”
“no” or
“yes”

“U”
“C” or “F”

Follow pH or
mV of Normal
Mode

Follow pH or
mV of Normal
Mode

P8.0
P8.1~8.6

P9.0
P9.1

Real time clock
Setting YMD, HMS

RESET
Reset confirm

No default

Always
defaults
“no”

71

“rtc”
“rtc”

“rSt”
“no” or
“yes”

pH/mV
reset

WARRANTY

Sper Scientific warrants this product against defects in
materials and workmanship for a period of five (5) years
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 Scientific 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 meter to expose its electronics will
void the warranty. To obtain warranty service, ship the unit
postage prepaid to:

SPER SCIENTIFIC LTD

7720 E Redfield Rd, Suite 7

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.sperscientific.com, or return your warranty
card within 10 days of purchase.

Revised 5/2/2012

72