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Summary of Contents for Sensorex CX20
- Page 1 Operation Manual CX20 1/8 DIN Microcomputer Based Conductivity/Resistivity Controller 11751 Markon Drive Garden Grove, CA. 92841 U.S.A. pg. 1 ...
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Page 2: Table Of Contents
CONTENTS GENERAL INTRODUCTION………………………………………..………....3 INITIAL INSPECTION……...………………..............3 USING THE SENSOREX MODEL CX20……..............3 Mounting procedure..................3 Front panel....................4 LCD screen....................5 Rear connectors...................5 Measure mode.....................6 Setting mode....................6 Conductivity/Resistivity calibration mode..........10 Controlling the relays.................10 ERROR DISPLAY AND TROUBLESHOOTING……………..………......11 SPECIFICATIONS……………..………………………………………......12 WARRANTY……………..………................13 pg. 2 ... -
Page 3: General Introduction
The model CX20 microprocessor performs a self-diagnostic routine every time you turn on the unit, it will provide you with basic information on the stability of the instrument. The model CX20 is equipped with 2 control relays. All control relays are programmable and hysteresis driven. -
Page 4: Front Panel
Replace the mounting bracket assembly onto the controller and secure the controller to the mounting panel. Refer to FIG 3. Panel Mounting brackets Figure 3 B. Front Panel The front panel consists of a 4-digit LCD display and 4 keys. 1. -
Page 5: Lcd Screen
* Specify “L’ = “Live Lead” 100 to 230 VAC Volts and “N” = “Neutral Lead” 1. Connect the AC line to the rear of the instrument. The model CX20 can be used with 100~240V AC at 50/60 HZ. Make sure the EARTH connector is connected to the earth lead of the AC power line. -
Page 6: Measure Mode
2. Connect the proper load to the output relays. Make sure that the load does not exceed the relay rating, 5 Amp at 115VAC and 2.5 Amp at 230 VAC. 【 】 Note Make sure that the power is unplugged before wiring your probes etc. Make sure you connect the AC power cord to the correct AC terminals. - Page 7 Select the preferred temperature compensation mode, press [ENTER] key to save, and enter the next setting screen. 2. Temperature Coefficient select: Temperature compensation select ENTER ENTER ENTER probe Basic cell constant select Pressing [UP] key or [DOWN] key in this screen will cycle the display between E2.00, E0.00 above.
- Page 8 Select the preferred basic cell constant , press [ENTER] key to save, and enter the next setting screen. ENTER ENTER ENTER ENTER ENTER Relay 1 HI/LOW select ENTER ENTER ENTER Relay 1 HI/LOW select ENTER ENTER ENTER ENTER Relay 1 HI/LOW select pg. 8 ...
- Page 9 5. Relay 1 High / Low select: Range select ENTER LOW1 ENTER ENTER Relay 1 set point value Pressing [UP] key or [DOWN] key in this screen will cycle the display from HI、LOW modes above. Select the preferred mode, press [ENTER] key to save, and enter the next setting screen.
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Page 10: Conductivity/Resistivity Calibration Mode
Same as “Relay 1 hysteresis value” G. Conductivity/Resistivity Calibration mode The model CX20 uses 1-point calibration for conductivity or resistivity. In the Measure mode, pressing [UP] key and [ENTER] key at the same time to allow the meter to go to the Conductivity / Resistivity calibration mode. -
Page 11: Error Display And Troubleshooting
ERROR DISPLAY AND TROUBLESHOOTING ERVIEW Conductivity/R Temperature esistivity Display Possible cause(s) Mode [Action(s)] Display Display "OvEr" Measure Reading is over the specified 10.0~120.0°C mode range. [Change range to higher level] “Undr” Measure Reading is under user specified 10.0~120.0°C mode range. [Change range to lower level] [Immerse the conductivity probe into standization solution.]... -
Page 12: Specifications
SPECIFICATIONS Conductivity/Resistivity: Basic Cell K Range Resolution Accuracy 0.01 0.000~1.999uS/cm 0.001uS/cm ±0.5%FS ± 1 digit 0.00~19.99MΩ 0.01MΩ 0.01 0.00~19.99uS/cm 0.01uS/cm ±0.5%FS ± 1 digit 0.000~1.999MΩ 0.001MΩ 0.10 0.00~19.99uS/cm 0.01uS/cm ±0.5%FS ± 1 digit 0.10 0.0~199.9uS/cm 0.1uS/cm ±0.5%FS ± 1 digit 1.00 0.0~199.9uS/cm 0.1uS/cm... -
Page 13: Warranty
If you purchased the item from our Sensorex distributors and it is under warranty, please contact them to notify us of the situation. Sensorex Service Department alone will determine if the product problem is due to deviations or customer misuse.
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