Pyxis EM-400 Manuel utilisateur

Rev. 1.0

Firmware version 1.10

Pyxis Lab, Inc

120 Jeffrey Ave.

Holliston, MA 0176

USA

www.pyxis-lab.com

service@pyxis-lab.com

1Contents

1General Description .................................................................................1

1.1 Specification......................................................................................1

1.2 Pyxis EM-400 Major Features...........................................................1

1.3 Unpacking the Instrument...............................................................2

1.4 Standard Accessories........................................................................2

1.5 Optional Accessories.........................................................................2

1.6 Light Shield Cover .............................................................................2

2Start Pyxis EM-400 ...................................................................................3

2.1 Battery Installation ...........................................................................3

2.2 Description of the Control Keys........................................................4

2.3 Turning On/Off Pyxis EM-400 ...........................................................4

3CHLOROPHYLL-A Measurement...............................................................5

3.1 Measurement ...................................................................................5

3.2 High Color and Turbidity Warning ....................................................5

4Calibration................................................................................................6

5Device Information and Diagnosis ...........................................................9

6Wireless Connection ..............................................................................10

iii

Confidentiality

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 disclosed herein. The

information disclosed herein shall not be disclosed to others or made public in any

manner without the express written consent of Pyxis Lab Inc.

Standard 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.

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 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.

Shipping

A Repair Authorization Number (RA) must be obtained from the Technical Support

([email protected]) 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.

1General Description

1.1 Specification

Measurement Range

0.3-100 ppb (In-vivo Chlorophyll-a)[1]

Excitation Wavelength

470 nm LED

Emission Wavelength

675 nm

Wavelength Accuracy

±1 nm

Detection Limit

0.3 ppb

Accuracy

±2% or ±4.0 ppb

Battery

9V alkaline battery

Typical Battery Life

3200 readings (480mAh battery)

Display

320x240 TFT-LCD, visible under direct

sunlight

Dimension

L160 W74 H33 (mm)

Weight

310g (without battery)

Temperature Range

40 to 106 ℉(4 to 41 ℃)

Humidity

85% at 106 ℉(41 ℃)

Environmental

IP67, dustproof and waterproof

[1] The detection range can be customized according to the user requirement.

1.2 Pyxis EM-400 Major Features

The Pyxis EM-400 analyzer measures the in-vivo chlorophyll-a concentration in live

algae cells. Chlorophyll a is the main photosynthetic pigments of algae. Chlorophyll a

measurement can be used to assess algal biomass. Main features include:

The EM-400 is pre-calibrated with using a live algae sample. The fluorescence

chlorophyll-a measurement is automatically compensated for sample color and

turbidity interference.

EM-400 can be calibrated using a water sample with known chlorophyll-a

concentration or a simulated 470/675 (Ex/Em) fluorescent sample through a user-

friendly menu-driven procedure.

No sample cuvette is needed and variations associated with the cuvette is

eliminated.

Large color graphic screen that can be read in direct sunlight.

1.3 Unpacking the 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 items

listed on the packing slip are included. If any items are missing or damaged, please

contact Pyxis Customer Service at service@pyxis-lab.com.

1.4 Standard Accessories

Quick instruction guide

9V alkaline battery

Full instrument manual is available from www.pyxis-lab.com

1.5 Optional Accessories

Carrying case for EM-400

100 ppb simulated CHLOROPHYLL-A calibration standard

1.6 Light Shield Cover

The light shield cover is shown in Figure 1. It should be in the closed position during

CHLOROPHYLL-A measurement.

Figure 1 Light Shield in the Open Position

Light Shield

Three keys

Measurement Cell

2Start Pyxis EM-400

2.1 Battery Installation

The EM-400 is powered by a 9-volt alkaline battery. Do not use rechargeable nickel

cadmium (NiCad) or lithium batteries. A typical 9V battery lasts for two months and

enables about 3000 measurements. When the battery capacity is critically low, the

EM-400 will display a LOW BATTERY warning for 5 seconds and then automatically

turn off.

Replace the battery to resume operation of the EM-400 after the battery warning. The

EM-400 will automatically turn on in the measurement mode after new battery

installation.

The EM-400 battery compartment, shown in Figure 2, is on the back side of the

instrument.

Install battery as follows:

1. Remove the battery compartment cover by loosening two screws.

2. Make sure that the smaller circular terminal (positive) of the battery is aligned with

the hexagonal socket (positive) of the battery holder and the hexagonal socket

(negative) of the battery with the circular terminal of the holder. Snap the battery

firmly into the battery holder.

3. Replace the battery compartment cover, making sure that the sealing O-ring is

lying flat on the battery holder. To prevent the EM-400 from accidently being

turned on due to vibration, please firmly tighten the two screws.

Figure 2 Install Battery

2.2 Description of the Control Keys

The EM-400 has three keys as shown in Figure 1. The left (<), right (>) and OK keys

are used to launch an action indicated on the screen directly above the keys. Please

note that the screen is not a tough screen. The labels above the keys indicate the

function associated with the keys and can change according to the screen modes.

Figure 3 Keys and associated functions

2.3 Turning On/Off Pyxis EM-400

To turn on the EM-400, press OK momentarily and release.

To turn off the EM-400, press and hold the OK key. Release the OK key when the LCD

display turns off (after about 3 seconds). The EM-400 will turn itself off after 60

seconds without user interaction through the keys.

＞

＜OK Key Functions

Keys

MEASUREMENT

Chlorophyll a

Calibration Info

100.0ppb

3CHLOROPHYLL-A Measurement

3.1 Measurement

When powered on, the EM-400 will be in the measurement (read) mode (see figure

3).

The water sample can be transferred to the measurement cell using a pipette or filled

directly from a faucet, sample bottle, or sample valve.

The light shield should be in the closed position in order to measure CHLOROPHYLL-A.

Allow 5 seconds for the EM-400 to reach stable CHLOROPHYLL-A readings. For a

sample containing 100 ppb CHLOROPHYLL-A, the measured CHLOROPHYLL-A should

be stabilized within the range of 98 to 102 ppb.

The EM-400 does not need to be turned off between measurements of two samples.

Rinsing the measurement cell several times is recommended.

3.2 High Color and Turbidity Warning

The EM-400 has extra channels to measure sample turbidity and color to

automatically compensate sample color and turbidity interference. If sample turbidity

and color values determined are too high, a CHLOROPHYLL-A measurement warning

will be displayed. In such a case, the user should dilute the sample for CHLOROPHYLL-

A measurement.

4Calibration

The EM-400 fluorimeter was calibrated using a laboratory cultured live algae sample.

The chlorophyll-a concentration in the standard sample was determined by the

standard extraction and spectrophometry procedure. Since chlorophyll-a in different

algae species has different fluorescent properties, the user must calibrate EM-400

with the real sample under investigation in order to measure an absolute (versus

relative) algae concentration. The chlorophyll-a concentration in the real sample can

be determined with the extraction method.

Alternatively, EM-400 can be calibrated with using a simulated standard. The

standard does not contain live algae. Instead, the standard contains a fluorophore

that emits a 675 nm fluorescence when it is excited by a 470 nm light. This calibration

ensures that any change in fluorescent signal strength caused by drift in electronics or

in optics is eliminated.

Calibration Process as follows:

1. Rinse sample cell with DI water three times. Fill the sample with DI water near

full and close the light shield. In emergency, “non-chlorophyll-a” water, such as

city water, may be used, but re-calibrate using DI water for the zero set step as

soon as it is available.

2. Power on by a press of OK key. Allow 5-10 seconds for meter to stabilize.

3. A Screen similar to Figure 4 appears. The value will be very low if DI water is

used; chlorophyll a should be near zero. A low non-zero value (e.g. 0.1 or 0.2,

etc.) is not problematic.

Figure 4

MEASUREMENT

Chlorophyll a

Calibration Info

0.0 ppb

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