Pyxis HM-500 Series User manual
Table of Contents
1 Introducon 2
1.1 MainFeatures......................................... 3
2 Specicaons 3
3 Unpacking Instrument 4
3.1 StandardAccessories ..................................... 4
3.2 OponalAccessories ..................................... 5
4 Installaon 6
4.1 Piping ............................................. 6
4.2 Wiring............................................. 7
4.3 ConnecngviaBluetooth................................... 7
4.4 ConnecngviaUSB ...................................... 8
5 Setup and Calibraon with uPyxis® Mobile App 8
5.1 Download uPyxis® MobileApp................................ 9
5.2 Connecng to uPyxis® MobileApp.............................. 9
5.3 Calibraon Screen and Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.4 DiagnosisScreen ....................................... 11
5.5 DeviceInfoScreen....................................... 12
6 Setup and Calibraon with uPyxis® Desktop App 12
6.1 Install uPyxis® DesktopApp.................................. 12
6.2 Connecng to uPyxis® DesktopApp ............................. 13
6.3 InformaonScreen ...................................... 13
6.4 CalibraonScreen....................................... 14
6.5 DiagnosisScreen ....................................... 15
7 Communicaon using Modbus RTU 16
8 Sensor Maintenance and Precauon 17
8.1 Methods to Cleaning the HM-500 Series Probe . . . . . . . . . . . . . . . . . . . . . . . 17
8.2 Storage ............................................ 18
9 Troubleshoong 18
10 Contact Us 18
Warranty Informaon
Condenality
The informaon contained in this manual may be condenal and proprietary and is the property of Pyxis
Lab, Inc. Informaon disclosed herein shall not be used to manufacture, construct, or otherwise reproduce
the goods described. Informaon disclosed herein shall not be disclosed to others or made public in any
manner without the express wrien consent of Pyxis Lab, Inc.
Standard Limited Warranty
Pyxis Lab warrants its products for defects in materials and workmanship. Pyxis Lab will, at its opon, repair
or replace instrument components that prove to be defecve with new or remanufactured components
(i.e., equivalent to new). The warranty set forth is exclusive and no other warranty, whether wrien or oral,
is expressed or implied.
Warranty Term
The Pyxis warranty term is thirteen (13) months ex-works. In no event shall the standard limited warranty
coverage extend beyond thirteen (13) months from original shipment date.
Warranty Service
Damaged or dysfunconal instruments may be returned to Pyxis for repair or replacement. In some in-
stances, replacement instruments may be available for short duraon loan or lease.
Pyxis warrants that any labor services provided shall conform to the reasonable standards of technical com-
petency and performance eecve at the me of delivery. All service intervenons are to be reviewed and
authorized as correct and complete at the compleon of the service by a customer representave, or des-
ignate. Pyxis warrants these services for 30 days aer the authorizaon and will correct any qualifying
deciency in labor provided that the labor service deciency is exactly related to the originang event. No
other remedy, other than the provision of labor services, may be applicable.
Repair components (parts and materials), but not consumables, provided during a repair, or purchased
individually, are warranted for 90 days ex-works for materials and workmanship. In no event will the in-
corporaon of a warranted repair component into an instrument extend the whole instrument’s warranty
beyond its original term.
Warranty Shipping
A Repair Authorizaon (RA) Number 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 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. To receive an RMA you can generate a
request on our website at hps://pyxis-lab.com/request-tech-support/.
Pyxis Technical Support
Contact Pyxis Technical Support at +1 (866) 203-8397, [email protected], or by lling out a request for
support at hps://pyxis-lab.com/request-tech-support/.
1 Introducon
The Pyxis HM-500 Series probe measures the concentraon of mulple oils in water ulizing uorescence
methodology at 365 nm wavelength and 410 nm excitaon. The HM-500 Series probe is uniquely designed
with extra photo-electric components that also monitor the color and turbidity of the sample water. This
proprietary feature enables the HM-500 Series probe to automacally compensate for color and turbidity
in the water sample eliminang interference commonly associated with real-world samples. The HM-500
Series probes have a short uidic channel and can be easily cleaned. The uidic and opcal arrangement of
the HM-500 Series probe are designed to overcome shortcomings associated with other uorometers that
have a distal sensor surface or a long, narrow uidic cell. Tradional inline uorometers are suscepble to
color/turbidity interference and fouling and can also be very dicult to clean. These unique features of the
HM-500 Seriesprobe provide a level of accuracy far greater than convenonal inline oil in water sensors and
also enables the user to conduct inline sensor cleanliness diagnoscs as a predicve value.
Oil is a complex mixture of organic compounds. The term “oil” can be referred to as a range of dierent
classes of chemical compounds, such as vegetable oil and petroleum oil. Almost all oil substances uoresce
under UV or near UV excitaon in a dierent degree because invariably, all oil contains aromac or other
uorescent compounds. Oil-in-water analysis by uorescence is a widely used eld-tesng method but is
fundamentally dierent from other wet chemistry methods, which are highly accurate but extremely me
consuming and done o-line. Commonly used alternave methods include the following:
1. EPA 1664 gravimetric method measures the amount of oil extracted to a solvent by weight.
2. The Infrared method (ASTD D7678) measures the absorpon of oil extracted to cyclohexane in the
range of 1370–1380 cm-1 by methyl group in the oil, using an IR spectrophotometer to qualify the oil
concentraon.
Due to the HM-500 Series probe ulizing the uorescent signature of the oil in water, the concentraons
inially measured by the probe for a given water sample “may” agree with each other in a relave sense,
but this is not always a guarantee. The HM-500 Series is designed to be calibrated to agree with the oil-in-
water concentraon from a given oil type determined by commonly used methods. The calibraon of the
HM-500 Series probe should be inially done by the user with an actual prepared oil-in-water standard,
within the detecon range of the sensor itself. Once calibrated to the prepared oil-in-water standard, the
HM-500 Series probe can be used to “measure” a synthec Pyxis Oil-In-Water Secondary Standard Soluon
to determine its “equivalent value”. This secondary standard and its equivalent value can then be used in
the future for sensor calibraons, as a more stable and easier method of sensor calibraon versus preparing
the actual oil-in-water standard each me. Details are explained on this process in the calibraon secons
of this manual.
Each HM-500 Series probe is also provided with the standard ST-001 Tee Assembly for rapid installaon in
commonly used piping plaorms. The ST-001 has two 3/4” female NPT ports in both threaded and straight
socket formats. Pyxis Lab also oers 2” and 3” Tee formats for larger inline installaons as well as the MA-
102S Submersion Adapter for submersed applicaons. The HM-500 Series probe oers both 4–20mA and
RS-485 Modbus outputs for rapid connecon to any microprocessor controller; PLC or DCS. When used with
the MA-WB Bluetooth Adapter, the HM-500 Series probe may be accessed wirelessly for cleaning and cali-
braon using the uPyxis® Mobile or Desktop App. Alternavely, if power supply is limited from the receiving
controller, users may ulize a Pyxis PowerPack auxiliary box. PowerPack is oered in both 1- and 4-channel
plaorms providing 24 VDC power supply to any Pyxis inline probe as well as 4–20mA signal passthrough
and Bluetooth connecvity to all Pyxis probes connected. See the Unpacking Instrument secon for details.
1.1 Main Features
The HM-500 Series probe includes the following main features:
• Easy calibraon and Cleanliness Check using uPyxis® Mobile or Desktop App
• Automac compensaon for turbidity up to 150 NTU and color created by up to 10 ppm iron or
equivalent to 10 ppm iron/humic acid
• Diagnosc informaon (probe fouling, color or turbidity over range, failure modes) are available in
uPyxis® App or via Modbus RTU
• Easy removal from the system for cleaning & calibraon without the need for any tools
• Wireless access via a MA-WB Bluetooth Adapter or PowerPack and uPyxis® App
• Easy inline installaon using ST-001 Tee Assembly provided
• MA-102S Submersion Adapter Kit available for submersed applicaon
2 Specicaons
Specicaons*HM-500 HM-510 HM-520
P/N 52101 52102 52106
Range (ppm)†0.1–10 0.5–1000 0.5–100
Accuracy 0.1 ppm or ≤3% of reading
Method UV-Fluorescence
Excitaon/Emission
Wavelengths (nm) 365/410
Calibraon
Inial calibraon with a user-prepared and veried oil-in-water soluon,
subsequent calibraons with Pyxis OIW-500 Secondary Standard (P/N:
21036)
Outputs 4–20mA analog output, RS-485 digital output with Modbus protocol
Installaon ST-001 Tee Assembly with 3/4” female socket & NPT threaded ports
Cable Length 5 with IP67 connectors
Power Supply 22–26 VDC, 65 mA
Dimension inch (mm) Length: 6.8 (172.7), Body Diameter: 1.44 (36.6)
Weight lbs (g) 0.37 (170)
Material CPVC
Operaonal Tempera-
ture °F (°C) 40–104 (4–40)
Storage Temperature °F
(°C) 20–140 (-7–60)
Pressure psi (MPa) Up to 100 (0.7)
Enclosure Rang IP67
Regulaon CE
*With Pyxis’s connuous improvement policy, these specicaons are subject to change without noce.
†The oil-in-water concentraon range is based on a marine diesel oil standard.
Figure 1. Oil-in-Water Secondary Standard (OIW-500)
Specicaon Oil-in-Water Secondary Standard (OIW-500)
P/N 21036
Oil in Water*500 ppm
Container 16 oz/500 mL Nalgene Amber Narrow Mouth Sample Bole
Shelf Life 6 months
Net Volume 510±10 mL
Net Weight 510±10 g
*Pyxis OIW-500 is a synthec standard which will read 500 ppm by a factory calibrated
HM-510 probe. This product must be diluted for use with HM-500 and HM-520 inline
probes to measure within their range. Once the HM-500 Series probe is calibrated to
a known oil-in-water standard, you may use the equivalent value of the prepared oil-
in-water secondary standard for future sensor calibraons. See calibraon secons
for details.
3 Unpacking Instrument
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 accessory items are included. If any item is missing
3.1 Standard Accessories
• ST-001 Tee Assembly 3/4” NPT (1x Tee, O-ring, and Nut) P/N: ST-001
• 7-Pin Female Adapter/Flying Leads Cable (2 ) P/N: MA-1100
• User Manual available online at www.pyxis-lab.com/support.html
4 Installaon
4.1 Piping
The provided ST-001 Tee Assembly can be connected to a pipe system through the 3/4” female ports, either
socket or NPT threaded. To properly install the HM-500 Series probe into the ST-001 Tee Assembly, follow
the steps below:
1. Insert the provided O-ring into the O-ring groove on the tee.
2. Insert the HM-500 Series probe into the tee.
3. Tighten the tee nut onto the tee to form a water-ght, compression seal.
Figure 3. Dimension of the HM-500 Series probe and the ST-001 Tee Assembly (mm)
4.2 Wiring
If the power ground terminal and the negave 4–20mA terminal in the controller are internally connected
(non-isolated 4–20mA input), it is unnecessary to connect the 4–20mA negave wire (green) to the 4–20mA
negave terminal in the controller. If a separate DC power supply other than that from the controller is used,
make sure that the output from the power supply is rated for 22–26 VDC @ 65mA.
*NOTE*The negave 24V power terminal (power ground) and the negave 4–20mA ter-
minal on the HM-500 Series probe are internally connected.
Follow the wiring table below to connect the HM-500 Series probe to a controller:
Wire Color Designaon
Red 24V +
Black 24V Power ground
White 4–20mA +
Green*4–20mA -
Blue RS-485 A
Yellow RS-485 B
Clear Shield, earth ground
*Internally connected to the power
ground
4.3 Connecng via Bluetooth
A Bluetooth adapter (P/N: MA-WB) can be used to connect a HM-500 Series probe to a smart phone with the
uPyxis® Mobile App or a computer with the uPyxis® Desktop App. The power should be sourced from a 24
VDC power terminal of a controller. If a controller is not available, the user may also use Pyxis PowerPACK-1
or PowerPACK-4 as an alternave to both an external power supply and a Bluetooth adapter. PowerPACK
from Pyxis Lab oers external power, Input/Output signal, and Bluetooth connecvity.
Figure 4. Bluetooth connecon to HM-500 Series probe
4.4 Connecng via USB
A USB-RS485 adapter (P/N: MA-485) can be used to connect a HM-500 Series probe to a computer with the
uPyxis® Desktop app.
*NOTE*Using non-Pyxis USB-RS485 adapters may result in permanent damage of the HM-
500 Series probe communicaon hardware.
Figure 5. USB connecon to HM-500 Series probe
5 Setup and Calibraon with uPyxis® Mobile App
The HM-500 Series probe should be inially calibrated with a two-point (zero + slope) procedure using a
deionized (DI) water sample (zero) and a prepared soluon (slope) containing the actual oil-in-water de-
sired. For the most accurate measurement in low range concentraons of oil-in-water, the two-point cal-
ibraon is required. The HM-500 Series probe can be also calibrated by a one-point procedure while in
service. However, a Cleanliness Check of the HM-500 Series probe should be conducted rst to determine
if the sensor is clean enough to be calibrated (see either the Mobile Diagnosis Screen secon or the Desktop
Diagnosis Screen secon).
*NOTE*Direct sunlight or indoor light on the HM-500 Series probe should be avoided,
although it is not necessary to completely shield the HM-500 Series probe from the ambient
light during both the zero and slope calibraons.
5.1 Download uPyxis® Mobile App
Download uPyxis® Mobile App from Apple App Store or Google Play.
Figure 6.
5.2 Connecng to uPyxis® Mobile App
Turn on Bluetooth on your mobile phone (Do not pair the phone Bluetooth to the HM-500 Series probe).
Open uPyxis® Mobile App. Once the app is open the app will start to search for the sensor. Once the
uPyxis® Mobile App connects to the sensor, press the HM-500 Series probe.
Figure 7.
5.3 Calibraon Screen and Reading
When connected, the uPyxis® Mobile App will default to the Calibraon screen (Figure 8). From the Calibra-
on screen, you can perform calibraons by pressing on Zero Calibraon,Slope Calibraon, and 4–20mA
Span. Follow the screen instrucons for each calibraon step.
5.3.1 Required Inial Slope Calibraon
For the rst calibraon, it is required to prepare an oil-in-water calibraon soluon using the desired oil
with a concentraon within the range of the HM-500 Series probe being used (i.e. HM-500 should be
calibrated with a user-prepared, oil-in-water soluon between 1 and 10 ppm). The user-prepared, oil-in-
water calibraon soluon can be made by mixing a sample of the oil with DI water to develop a known ppm
level. The concentraon of this soluon should be veried by standard wet chemistry methods or using
Pyxis HM-900 Handheld Oil-in-Water Analyzer.
*NOTE*If the user wants to measure a dierent oil, then use this calibraon procedure for
the rst calibraon of the new desired oil.
5.3.2 General Slope Calibraon
The slope value of the HM-500 Series probe can be calibrated in two ways:
1. By preparing an oil-in-water calibraon soluon as described in the Required Inial Slope Calibraon
secon, or
2. By using the Pyxis Oil-in-Water Secondary Standard (OIW-500) described below.
As an alternave to preparing a real oil-in-water calibraon standard for future calibraons, the Pyxis OIW-
500 synthec Oil-in-Water Secondary Standard (P/N: 21036) can be used. OIW-500 components are highly
stable and far easier to use for rapid calibraon compared to a real oil-in-water soluon. The OIW-500
calibraon standard oers a 500 ppm equivalent oil-in-water concentraon recognized by the uorescent
signature of the HM-500 Series probe. Due to the dierent oil-in-water concentraon ranges in the HM-500
Series probes, follow the guidelines below to properly prepare the OIW-500 soluon for each probe:
• HM-500: Prepare a 5 ppm oil-in-water soluon by mixing 198 mL of DI Water with 2 mL of OIW-500.
• HM-510: No preparaon required. Use OIW-500 without modicaon.
• HM-520: Prepare a 50 ppm oil-in-water soluon by mixing 180 mL of DI Water to 20 mL of OIW-500.
*NOTE*For the HM-500 probe, it is recommended to prepare a 5 ppm oil-in-water soluon
prior to each calibraon. At this low concentraon, the soluon has a reduced long-term
stability and shelf-life.
Once a OIW-500-based soluon is prepared, submerge the HM-500 Series probe in the prepared soluon
and use the Calibraon screen of the uPyxis® Mobile App to read the current ppm value from the probe.
Record this ppm value. This ppm value should be used as the slope calibraon value for future calibraons
when using the prepared OIW-500 Secondary Standard (Figure 9).
Figure 8. Calibraon screen Figure 9. Slope Calibraon Figure 10. 4–20mA Span
5.4 Diagnosis Screen
From the Diagnosis screen, you can set the diagnosis condion as well as Export & Upload. This feature
To preform a probe Cleaniness Check, rst select the Diagnosis Condion (Figure 11) which denes the
uid type that the HM-500 Series probe in currently measuring, then press Cleanliness Check. If the
probe is clean, a green Clean message will be shown (Figure 12). If the probe is parally fouled, a yel-
low Becoming Dirty message will be shown. If the probe is severely fouled, a red Dirty message will be
shown. In this case, follow the procedure in the Methods to Cleaning the HM-500 Series Probe secon of
this manual.
Figure 11. Figure 12.
5.5 Device Info Screen
From the Device Info screen. You can name the Device or Product.
6 Setup and Calibraon with uPyxis® Desktop App
The HM-500 Series probe should be inially calibrated with a two-point (zero + slope) procedure using a
deionized (DI) water sample (zero) and a prepared soluon (slope) containing the actual oil-in-water de-
sired. For the most accurate measurement in low range concentraons of oil-in-water, the two-point cal-
ibraon is required. The HM-500 Series probe can be also calibrated by a one-point procedure while in
service. However, a Cleanliness Check of the HM-500 Series probe should be conducted rst to determine
if the sensor is clean enough to be calibrated (see either the Mobile Diagnosis Screen secon or the Desktop
Diagnosis Screen secon).
*NOTE*Direct sunlight or indoor light on the HM-500 Series probe should be avoided,
although it is not necessary to completely shield the HM-500 Series probe from the ambient
light during both the zero and slope calibraons.
6.1 Install uPyxis® Desktop App
Download the latest version of uPyxis® Desktop soware package from: hp://www.pyxis-lab.com/sup-
port.html this setup package will download and install the Microso.Net Framework 4.5 (if not previously
installed on the PC), the USB driver for the USB-Bluetooth adapter (MA-NEB), the USB-RS485 adapter (MA-
485), and the main uPyxis® Desktop applicaon. Double click the uPyxis.Setup.exe le to install.
Figure 13.
Click Install to start the installaon process. Follow the screen instrucons to complete the USB driver and
uPyxis® installaon.
6.2 Connecng to uPyxis® Desktop App
When the uPyxis® Desktop App opens, to nd your device, click on Device, then Connect via USB-RS485.
Figure 14.
6.3 Informaon Screen
Once connected to the device, a picture of the device will appear on the top le corner of the window and
the uPyxis® Desktop App will default to the Informaon screen. On the Informaon screen you can set the
informaon descripon for Device Name and Product Name, then click Set to save.
Figure 15.
6.4 Calibraon Screen
To calibrate the device, click on Calibraon. On the Calibraon screen there are three calibraon buons,
Zero Calibraon,Slope Calibraon, and 4–20mA Span. Follow the screen instrucons for each calibraon
step. The screen also displays the reading of the device. The reading refresh rate is every 4 seconds.
Figure 16.
6.4.1 Required Inial Slope Calibraon
For the rst calibraon, it is required to prepare an oil-in-water calibraon soluon using the desired oil
with a concentraon within the range of the HM-500 Series probe being used (i.e. HM-500 should be
calibrated with a user-prepared, oil-in-water soluon between 1 and 10 ppm). The user-prepared, oil-in-
water calibraon soluon can be made by mixing a sample of the oil with DI water to develop a known ppm
level. The concentraon of this soluon should be veried by standard wet chemistry methods or using
Pyxis HM-900 Handheld Oil-in-Water Analyzer.
*NOTE*If the user wants to measure a dierent oil, then use this calibraon procedure for
the rst calibraon of the new desired oil.
6.4.2 General Slope Calibraon
The slope value of the HM-500 Series probe can be calibrated in two ways:
1. By preparing an oil-in-water calibraon soluon as described in the Required Inial Slope Calibraon
secon, or
2. By using the Pyxis Oil-in-Water Secondary Standard (OIW-500) described below.
As an alternave to preparing a real oil-in-water calibraon standard for future calibraons, the Pyxis OIW-
500 synthec Oil-in-Water Secondary Standard (P/N: 21036) can be used. OIW-500 components are highly
stable and far easier to use for rapid calibraon compared to a real oil-in-water soluon. The OIW-500
calibraon standard oers a 500 ppm equivalent oil-in-water concentraon recognized by the uorescent
signature of the HM-500 Series probe. Due to the dierent oil-in-water concentraon ranges in the HM-500
Series probes, follow the guidelines below to properly prepare the OIW-500 soluon for each probe:
• HM-500: Prepare a 5 ppm oil-in-water soluon by mixing 198 mL of DI Water with 2 mL of OIW-500.
• HM-510: No preparaon required. Use OIW-500 without modicaon.
• HM-520: Prepare a 50 ppm oil-in-water soluon by mixing 180 mL of DI Water to 20 mL of OIW-500.
*NOTE*For the HM-500 probe, it is recommended to prepare a 5 ppm oil-in-water soluon
prior to each calibraon. At this low concentraon, the soluon has a reduced long-term
stability and shelf-life.
Once a OIW-500-based soluon is prepared, submerge the HM-500 Series probe in the prepared soluon
and use the Calibraon screen of the uPyxis® Mobile App to read the current ppm value from the probe.
Record this ppm value. This ppm value should be used as the slope calibraon value for future calibraons
when using the prepared OIW-500 Secondary Standard (Figure 17).
Figure 17. Slope Calibraon
6.5 Diagnosis Screen
Aer the device has been calibrated and installaon has been completed, to check diagnosis, click on Diag-
nosis. When in the Diagnosis screen you can view the Diagnosis Condion of the device. This feature may
To preform a probe Cleaniness Check, rst select the Diagnosis Condion (Figure 18) which denes the
uid type that the HM-500 Series probe in currently measuring, then click Cleanliness Check. If the probe
is clean, a green Clean message will be shown (Figure 19). If the probe is parally fouled, a yellow
Becoming Dirty message will be shown. If the probe is severely fouled, a red Dirty message will be
shown. In this case, follow the procedure in the Methods to Cleaning the HM-500 Series Probe secon of
this manual.
8 Sensor Maintenance and Precauon
The HM-500 Series probe is designed to provide reliable and connuous oil-in-water readings even when in-
stalled in moderately contaminated industrial waters. Although the opcs are compensated for the eects
of moderate fouling, heavy fouling will prevent the light from reaching the sensor, resulng in low readings
and the potenal for product overfeed if the HM-500 Series probe is used as part of an automated control
system. When used to control product dosing, it is suggested that the automaon system be congured
to provide backup to limit potenal product overfeed, for example by liming pump size or duraon, or by
alarming if the pumping rate exceeds a desired maximum limit.
The HM-500 Series probe is designed to be easily removed, inspected, and cleaned if required. It is sug-
gested that the HM-500 Series probe be checked for fouling and cleaned/calibrated on a monthly basis.
Heavily contaminated waters may require more frequent cleanings. Cleaner water sources with less con-
taminaon may not require cleaning for several months.
The need to clean the HM-500 Series probe can be determined by the Cleanliness Check using either the uP-
yxis® Mobile App (see the Mobile Diagnosis Screen secon) or the uPyxis® Desktop App (see the Desktop
Diagnosis Screen secon).
8.1 Methods to Cleaning the HM-500 Series Probe
Any equipment in contact with industrial systems is subject to many potenal foulants and contaminants. A
small, so bristle brush, Q-Tips coon swab, or so cloth may be used to safely clean the probe housing and
the quartz opcal sensor channel. Deposits inside the probe quartz tube can be cleaned using a prepared
detergent-based cleaning soluon and hot water. Prepare 200 mL of hot water (55–60 °C) with 10 mL of
industrial degreasing detergent.
To clean the HM-500 Series probe, soak the lower half of the probe in 100 mL of the prepared cleaning
soluon for 10 minutes and gently scrub the quartz opcal sensor channel. Rinse the HM-500 Series probe
with dislled water and then check for the ashing blue light inside the HM-500 Series probe quartz tube.
Use the Cleanliness Check via uPyxis® Mobile App (see the Mobile Diagnosis Screen secon) or uPyxis®
Desktop App (see the Desktop Diagnosis Screen secon) to conrm that the HM-500 Series probe is clean.
Repeat the process as needed unl the Cleanliness Check shows Clean .
Figure 20. Cleaning of HM-500 Series Probe
8.2 Storage
Avoid long term storage at temperature over 140 °F. In an outdoor installaon, properly shield the HM-500
Series probe from direct sunlight and precipitaon.
9 Troubleshoong
If the HM-500 Series probe output signal is not stable and uctuates signicantly, make an addional ground
connecon—connect the clear (shield, earth ground) wire to a conductor that contacts the sample water
electrically such as a metal pipe adjacent to the HM-500 Series tee.
10 Contact Us
Pyxis Lab, Inc
1729 Majesc Dr. Suite 5
Lafayee, CO 80026 USA
www.pyxis-lab.com
Phone: +1 (866) 203-8397
Email: [email protected]
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