Pyxis SP-710 User manual

SP-710 Water Multimeter
Operation Manual
Jan. 23, 2019
Rev. A
US Patent: 9612221
Pyxis Lab, Inc.
1729 Majestic Dr. Suite 5
Lafayette, CO 80026 USA
www.pyxis-lab.com
© 2017 Pyxis Lab, Inc.
Pyxis Lab Proprietary and Confidential

The information contained in this manual may be confidential and proprietary and is the property of Pyxis Lab, Inc.
Information disclosed herein shall not be used to manufacture, construct, or otherwise reproduce the goods
described. Information disclosed herein shall not be disclosed to others or made public in any manner without the
express written consent of Pyxis Lab, Inc.
Limited Warranty
Pyxis Lab warrants its products for defects in materials and workmanship. Pyxis Lab will, at its option, repair or
replace instrument components that prove to be defective with new or remanufactured components (i.e.,
equivalent to new). The warranty set forth is exclusive and no other warranty, whether written or oral, is expressed
or implied.
Device Warranty Term
The Pyxis warranty for SP-710 and SP-710B ‘device not including pH-ORP module’ term is thirteen (13) months from
original shipment from Pyxis. In no event shall the standard limited warranty coverage extend beyond thirteen (13)
months from original shipment date.
pH/ORP Module Warranty Term
The Pyxis warranty term for the pH/ORP module is six (6) months ex-works. This is a consumable module to SP-710
and SP-710B and will require scheduled replacements. Pyxis Lab recommends replacement of this module on a basis
of every 9-12 months for preventative maintenance. In no event shall the standard limited warranty coverage
extend beyond (6) months from original shipment date.
Warranty Service
Damaged or dysfunctional instruments may be returned to Pyxis for repair or replacement. In some instances,
replacement instruments may be available for short duration loan or lease.
Pyxis warrants that any labor services provided shall conform to the reasonable standards of technical competency
and performance effective at the time of delivery. All service interventions are to be reviewed and authorized as
correct and complete at the completion of the service by a customer representative or designate. Pyxis warrants
these services for 30 days after the authorization and will correct any qualifying deficiency in labor provided that the
labor service deficiency is exactly related to the originating event. No other remedy, other than the provision of labor
services, may be applicable.
Repair components (parts and materials), but not consumables, provided in the course of a repair, or purchased
individually, are warranted for 90 days ex-works for materials and workmanship. In no event will the incorporation
of a warranted repair component into an instrument extend the whole instrument’s warranty beyond its original
term.
Warranty Shipping
A Repair Authorization Number (RA) must be obtained from Pyxis Technical Support before any product can be
returned to the factory. Pyxis will pay freight charges to ship replacement or repaired products back to the customer.
The customer shall pay freight charges for returning products to Pyxis. Any product returned to the factory without
an RA number will be returned to the customer.
Pyxis Technical Support
Contact Pyxis Technical Support at [e-mail] or 1-866-203-8397 (Mo-Fri 7:00AM-5PM MT)

Pyxis SP-710 Multimeter Operation Manual 3
Table of Contents
1Introducing the Pyxis SP-710 Multimeter.....................................................................................5
1.1 Features of the Pyxis SP-710.........................................................................................................5
1.2 Specifications ................................................................................................................................6
1.3 Unpacking the Pyxis SP-710..........................................................................................................6
1.4 Standard Accessories ....................................................................................................................6
1.5 Optional Accessories.....................................................................................................................7
1.6 Dual Function Seal for the pH/ORP Cell........................................................................................7
2Using the Pyxis SP-710................................................................................................................8
2.1 Battery Installation........................................................................................................................8
2.2 Turning the SP-710 ON and OFF ...................................................................................................9
2.3 Turn on the pH/ORP Module Power.............................................................................................9
2.4 Using the SP-710 Control Keys....................................................................................................10
3Multiple Parameter Measurement............................................................................................10
3.1 PTSA and Conductivity Measurement ........................................................................................10
3.2 pH and ORP Measurement .........................................................................................................11
3.3 Temperature Measurement .......................................................................................................12
3.4 Free Chlorine Measurement.......................................................................................................12
3.5 Conductivity Temperature Compensation..................................................................................14
3.6 High Color and Turbidity Warning ..............................................................................................14
3.7 pH Measurement Principle.........................................................................................................14
3.8 ORP Measurement Principle.......................................................................................................15
4Calibrating the SP-710...............................................................................................................15
4.1 PTSA Standalone Calibration (2 point with zero)........................................................................16
4.2 Combined Calibration Procedure................................................................................................16
4.3 Standard Conductivity Calibration (500, 1000, 2500, or 5000 µS) .............................................18
4.4 User-Defined Conductivity Calibration Procedure......................................................................19
5pH and ORP Calibrations...........................................................................................................20
5.1 pH Electrode Calibration.............................................................................................................21
5.1.1 One-Point Calibration .........................................................................................................21
5.1.2 Second-Point Calibration ....................................................................................................21
5.1.3 Third-Point Calibration........................................................................................................21
5.2 ORP Calibration...........................................................................................................................22
6Chlorine Calibration..................................................................................................................23
6.1 Chlorine Reagent Blank (Zero) Calibration..................................................................................23
6.2 Chlorine Slope Calibration ..........................................................................................................24
7Device Information and Diagnosis.............................................................................................24
8Device Maintenance.................................................................................................................25
9Replacing the pH/ORP module (Part #50313).............................................................................26
9.1 Module Replacement..................................................................................................................26

Pyxis SP-710 Multimeter Operation Manual 4
9.2 Bluetooth Pairing Your pH/ORP Module to SP-710....................................................................27
10 Bluetooth Connection of SP-710 to Devices...............................................................................27
11 Calibrate ST-500 with SP-710 ....................................................................................................28
12 REGULATORY APPROVAL ..........................................................................................................30
13 Appendix. Cleaning Kit..............................................................................................................31

Pyxis SP-710 Multimeter Operation Manual 5
1Introducing the Pyxis SP-710 Multimeter
The Pyxis SP-710 is a handheld multimeter that measures five key parameters. It is a cuvette-less
device. Less than 5 ml water sample is needed to fill the two sample cells for the measurement.
•pH
•Conductivity
•PTSA (Pyrene Tetrasulfonic acid Tetra Sodium)
•ORP
•Temperature
•Free and Total Chlorine (TMB Method)
1.1 Features of the Pyxis SP-710
The SP-710 includes the following features:
•Breakthrough technology combining PTSA with conductivity and pH/ORP in a single rugged
meter.
•The PTSA measurement uses custom signal processing algorithms to compensate for sample
color and turbidity interference.
•Modular pH/ORP design with extra-large junction capacity providing increased service life.
•Easy replacement of the pH/ORP module without the need to open the meter enclosure.
•The pH/ORP module can be used wirelessly and independent of the main module.
•Long battery life: 10,000+ readings.
•Self-diagnosis during calibrations.

Pyxis SP-710 Multimeter Operation Manual 6
1.2 Specifications
Specifications are subject to change without notice. Contact Pyxis ([e-mail]) for
an updated specification list.
Item
Specification
Analysis
PTSA
0-300 ppb, ±1 ppb or 1% precision
Conductivity
1-15,000 µS/cm with ATC. ±1% or ±1 µS/cm precision
pH
0-14 with ATC, ±0.01 pH unit precision
ORP
±1500 mV, ±1 mV precision
Temperature
0-70 °C (32-160 °F), ±0.1 °C (±0.2 °F)
Chlorine
0 –2.2 ppm free or total, +/- 0.01 precision
Storage Temperature
-10 °C –50 °C (-4 - 140° F)
Operational Temperature
0 °C –40 °C (32 - 104° F)
Sensor Module
pH/ORP, replaceable –recommended every 9-12 months
Typical Sensor Life
pH/ORP - 1 year
PTSA/Conductivity - 5 years
Protection Grade
IP67, Fully Dustproof and Waterproof
Regulation
CE
Display
Color LCD, Visible Under Direct Sunlight
Power Supply
4 AA alkaline batteries
Typical Battery Life
10,000 readings
Dimension (L x W x H)
208 x 80 x 45 mm (8.19 x 3.15 x 1.77 inches)
Weight
520 g (1.15 lbs) batteries excluded
1.3 Unpacking the Pyxis SP-710
Remove the instrument and accessories from the shipping container and inspect each item for
any damage that may have occurred during shipping. Verify that all items listed on the packing
slip are included. If any items are missing or damaged, please contact Pyxis Customer Service at
[e-mail] shipping and storage after production, a sponge wetted with the
KCl based pH storage solution is placed in the pH/ORP cell. You may also observe some residual
dry storage solution leaving white potassium chloride crystal in the surrounding areas of the cell.
Please rinse the cell with a water sample before use.
1.4 Standard Accessories
The following accessories are included in the SP-710 package:
•Four (4) AA alkaline batteries
•Bluetooth USB adapter (Part # MA-NEB)
The full instrument manual is available for download at www.pyxis-lab.com/support.html

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1.5 Optional Accessories
The following optional accessories can be ordered from Pyxis Customer Service,
[email protected]m or Pyxis EStore at www.pyxis-lab.com/shop
Accessory
Item number
Replacement pH/ORP Module - Bluetooth
50315
Carrying Case for SP-710
MA-700
100 ppb PTSA + 1000 S/cm (KCl) combined standard
PTSA-1010
220 mV ORP Calibration Standard
ORP-220
100 ppb PTSA Calibration Standard
PTSA-100
pH 4-7-10 Calibration Combination Kit
57007
1000uS Conductivity Calibration Standard
57008
1.6 Dual Function Seal for the pH/ORP Cell
The SP-710 pH/ORP seal (Figure 1) has two functions:
•When the multimeter is in storage, the rubber seal seals the pH/ORP cell, maintaining a
moist environment for the electrodes.
•The seal contains a permanent magnet. When being brought close to the front end of the
module, the seal turns on pH/ORP module power.

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Figure 1. Seal in the open position
Please fill the pH/ORP cell with 1 ml of the pH 4 buffer solution or pH electrode storage solution
at all times when not using the pH/ORP cell. NOTE - The sponge soaked with the pH storage
solution in the pH/ORP helps prolong the life of the pH/ORP module.
2Using the Pyxis SP-710
2.1 Battery Installation
The main module of the SP-710 is powered by four AA alkaline batteries. Typical battery life is
10,000 measurements, or 10 months. When the battery capacity is critically low, the SP-710
displays a LOW BATTERY warning for five seconds, and then automatically turns off.
The SP-710 does not turn itself on automatically after the new battery installation. To turn on the
SP-710 after new battery installation, press the OK key momentarily and release.
Maintaining SP-710 date and time during battery installation: The SP-710 has a calendar timer.
To prevent the calendar from being reset to the default date and time (01/01/1970, 00:00:00),
install the four new batteries within four minutes after the old batteries are removed from the
battery compartment.
The SP-710 date and time is synchronized with your PC automatically when connected with
uPyxis© app via Bluetooth adapter provided.

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The SP-710 battery compartment, shown in Figure 2, is on the back side of the instrument.
Batteries are held in place by a cover secured with two Phillips-head screws.
Figure 2. The SP-710 battery compartment
Use the following procedure to install new batteries:
1. Remove the battery compartment cover by loosening the two screws.
2. Remove the old batteries and dispose of properly.
3. Following the positive and negative terminal signs in the compartment bottom, snap four
new AA alkaline batteries firmly into the battery holder.
4. Replace the battery compartment cover and ensure that the sealing O-ring is lying flat on
the battery holder. NOTE: Failure to properly seat the O-ring may result in water damage
to the meter.
5. Fasten the two screws.
2.2 Turning the SP-710 ON and OFF
To turn on the SP-710:Press the OK key momentarily and release.
To turn off the SP-710:Press and hold the OK key for three seconds. Release the OK key when
the LCD display turns off.
The SP-710 turns itself off after 30 seconds without user interaction detected. This is done to
conserve battery life.
2.3 Turn on the pH/ORP Module Power
The module has a permanently sealed 3.7 V lithium battery. The module is turned on by rotating
the pH/ORP seal to touch the front face of the module. A sealed magnet within the rubber seal

Pyxis SP-710 Multimeter Operation Manual 10
will trigger the module power circuit. The pH/ORP module will turn itself off when either
commanded by the main SP-710 module or automatically based on the idle time limit. The
purpose for this design is to extend battery life.
If pH/ORP measurement is not needed, the module does not need to be turned on.
2.4 Using the SP-710 Control Keys
The SP-710 has three control keys, as shown in Figure 3. The left ( < ), right ( > ), and OK keys are
used to launch actions indicated on the LCD screen directly above the keys. Note that the LCD
screen is not a touch-enabled device; the labels above the keys indicate the function associated
with the keys, and functions can be changed in different operation modes.
Figure 3. Control keys and associated functions
3Multiple Parameter Measurement
3.1 PTSA and Conductivity Measurement
When powered on, the SP-710 is in the measurement mode of PTSA and Conductivity (as shown
in Figure 3 above).
A water sample should be transferred to the PTSA cell using a pipette, or the cells can be filled
directly from a sample bottle.
Rinse cells before measurement. Before beginning a measurement, use some of the sample water
to rinse the cells at least three times.
Allow five seconds for the SP-710 to reach stable readings. The time required to reach a stable
reading may be slightly longer if the water sample temperature is significantly different than the