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.
85% at 106 ℉ (41 ℃) Environmental IP67, dustproof and waterproof 1.2 Pyxis SP-400 Major Features The Pyxis SP-400 analyzer simultaneously measures the electrical conductivity value and the concentration of fluorescent tracer PTSA of a water sample. Main features include:...
The SP-400 is pre-calibrated for measuring PTSA (pyrenetetrasulfonic acid) in the range of 0 to 300 ppb. The fluorescence PTSA measurement is automatically compensated for sample color and turbidity interference. Conductivity and PTSA fluorescence can be calibrated using a single combined standard through a user-friendly menu-driven procedure.
2 Start Pyxis SP-400 2.1 Battery Installation The SP-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 SP-400 will display a LOW BATTERY warning for 5 seconds and then automatically turn off.
Figure 2 Install Battery 2.2 Description of the Control Keys The SP-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.
To turn on the SP-400, press OK momentarily and release. To turn off the SP-400, press and hold the OK key. Release the OK key when the LCD display turns off (after about 3 seconds). The SP-400 will turn itself off after 60 seconds without user interaction through the keys.
100 ppb PTSA, the measured PTSA should be stabilized within the range of 98 to 102 ppb. The SP-400 does not need to be turned off between measurements of two samples. Rinsing the measurement cell several times is recommended, especially when switching to a sample with conductivity significantly different than the previous sample.
It is highly recommended to use the PTSA standalone calibration procedure if the user desires to achieve higher accuracy for low range PTSA measurements (< 20 ppb). The Combined PTSA/Conductivity Calibration procedure yields the PTSA calibration slope only and does not change the zero point. PTSA Standalone Calibration (2 Point with Zero) 1) Rinse sample cell with DI water.
Page 12
Figure 5 Press Zero labeled key (<) to set the zero point. 7) After successful zero set, a checkmark symbol will appear next to “Press Zero Button” to confirm success. The screen will also update to show the Slope steps, as in Figure 6.
Page 13
8) Rinse the sample cell out thoroughly (twice at least) with the desired PTSA standard and with the measurement cell near full, close the light shield. 9) If the 100 ppb PTSA default is not the desired PTSA for calibration, press the Cycle labeled key (<) to cycle between the PTSA standards 100-200-300 ppb (it repeats).
Page 14
Figure 8 Quick Tips 1) If the 100 ppb PTSA concentration (the default) is the desired calibration and it is what has been added to the measurement cell for the slope (step 9), then the key presses from the beginning, including the power on, are: OK, <, <, {refill with PTSA standard}, >, then after completion, Exit to return to Measurement Mode.
5) After a successful calibration, the unit does not automatically return to the measurement mode. If Exit is held down too long the unit will power down rather than returning to the measurement mode. 4.1 Standard Conductivity Calibration (500, 1000, 2500, or 5000 µS) Example based on 1000 µS 1) Rinse sample cell with desired conductivity standard.
Page 16
Figure 10 Use the > key to cycle to the desired calibration, e.g. 1000 µS. The Standard Conductivity selections are 500, 1000, 2500 or 5000 µS. For other conductivity values the User Defined calibration mode must be used. With each press of >, various elements of the display will update, such as the calibration title, the type (“Target”), and the black bar.
Page 17
Press OK key (labeled Calib) to confirm the specific Conductivity calibration desired. The screen will update as in Figure 12. Figure 12 8) Start the calibration by a press of OK key (skip 9 and 10). 9) Or, press Cancel (< key) to return to the Conductivity calibration selection screen (as in Figure 10).
Figure 13 12) After successful calibration, press and hold OK key for 3 seconds (labeled Calib), to return to the basic read (measurement) screen. Return to read mode is not automatic, except through a power-off cycle. 13) The unit will auto-read the conductivity and PTSA of a fresh sample in the measurement cell without further key presses.
Page 19
1) Rinse sample cell with desired conductivity standard. 2) Power on by a press of OK key. Allow 5-10 seconds for meter to stabilize. 3) A screen similar to Figure 14 will appear. The unit is reading both conductivity and PTSA. The PTSA will be low or zero if the standard is solely a conductivity one.
Page 20
Figure 15 Use the < or > keys to cycle to the User Defined calibration. With each press various elements of the display will update, such as the calibration title, the type (“Target”), and the black bar. When the User Defined calibration is selected the screen will appear similar to Figure 16.
Page 21
6) If the displayed Target numeric value is not that desired, use the - and + labeled keys (< or >) to adjust the value to that desired. Holding them down will scroll the values at a speedier rate. Once the value is as desired, press Set (OK) to confirm the numeric value to be used.
Page 22
Figure 19 11) After successful calibration, hold for a long press (3 seconds) the Calib key, to return to the basic read (measurement) screen. Return to read mode is not automatic, except through a power-off cycle. 12) The unit will auto-read the conductivity and PTSA of a fresh sample in the sample cell without further key presses.
4) Once the target selection focus has been moved to User Defined as in Figure 16 and show the - and + labels on the black bar, the keys are no longer set to cycling through the calibration types but to adjust the User Defined numeric value. To get back to being able to cycle the types, you must go forward to the pop up screen of Figure 18 and Exit.
Page 24
others (see the other Calibration Procedures). Otherwise, proceed with the steps below for use with the Combined Standard. Figure 21 6) Ensure the Meter is filled with Combined Standard and press Calib labeled key (OK) to confirm the desired calibration. 7) A Confirmation popup will appear as in Figure 22.
Page 25
Figure 22 Press OK key to execute both conductivity and PTSA calibrations. (Skip 9 and 10.) Only 1 key press is needed. 9) Or, press Cancel (< key) to return to the conductivity calibration type selection screen (as in Figure 21), where if desired the calibration can be changed with use of “<”...
Page 26
Figure 23 12) After a second, if the PTSA calibration is successful, the PTSA value will also be displayed in the Measured section below the conductivity value, and a checkmark will appear. A small variance is acceptable. The message “Calibration Succeed” will appear in red, as in Figure 24.
Press the diagnosis labeled key to switch to the diagnosis screen where raw measurement data are displayed (Figure 26). The information has no use for normal operation. Please provide an image of both the device information screen and the diagnosis screen when you contact Pyxis (service@pyxis-lab.com) for troubleshooting your device.
Figure 26 6 Wireless Connection The Pyxis SP-400 can be connected to a smart phone or a computer via WIFI or Bluetooth for upgrading the device software. The SP-400 can be wirelessly paired with other Pyxis devices for exchanging data. In the normal operation modes, the wireless function is turned off.
Need help?
Do you have a question about the SP-400 and is the answer not in the manual?
Questions and answers