YOKOGAWA FLXA202 - User Manual

Other manuals for YOKOGAWA FLXA202

Startup Manual35 pages

Questions and Answers

A
Anthony HowardJul 27, 2025
What to do if CYLINDER FAIL signal appears on YOKOGAWA FLXA202 Measuring Instruments?
- T
  tracey83Jul 27, 2025
  If the 'CYLINDER FAIL' signal appears on your YOKOGAWA Measuring Instruments, first, ensure the PG2 pressure gauge in the control box displays the correct preset value while in cleaning mode. If the reading is low, check for loose connections and readjust accordingly. Also, remove any dirt from the cylinder barrel and apply a thin layer of grease. Degraded lubricating grease can also cause this issue, so cleaning and re-greasing are important. If the slide of the cylinder is in an upper position, refer to section 6.5.
M
Martin WatsonAug 2, 2025
What to do if a smaller quantity of chemical solution is fed to holder in YOKOGAWA Measuring Instruments?
- L
  Leonard RiceAug 2, 2025
  If a smaller quantity of chemical solution is being fed to the holder in your YOKOGAWA Measuring Instruments, inspect the thin covering in the bottom of the metering tank and replace it if it's deteriorated or damaged. If the thin covering is fine, check for leaks around the SV1 solenoid valve (in the control box) that's used for forced feeding of the chemical solution. If air flows through the valve when closed, replace it. Also, check the chemical solution in the cleaning chamber for traces indicating backflow into the chemical tank. If the bleed valve is clogged due to reverse flow, clean it.
Z
Zachary SimmonsAug 8, 2025
Why more than 100 ml of chemical solution at a time is being fed to holder in YOKOGAWA FLXA202 Measuring Instruments?
- N
  Nicholas ForbesAug 8, 2025
  If your YOKOGAWA Measuring Instruments are feeding more than 100 ml of chemical solution at a time to the holder, it may be due to an air leak from the O-ring in the metering tank. Fully tighten the cap. If the leak persists, inspect the cylinder barrel for cracks and the O-ring for defects. Replace any defective components.
A
April AguilarAug 14, 2025
What to do if chemical solution cannot be fed into cleaning chamber in YOKOGAWA FLXA202?
- R
  Robert MooreAug 14, 2025
  If chemical solution cannot be fed into the cleaning chamber of your YOKOGAWA Measuring Instruments, first ensure the cleaning sequence is complete and the slider is at the bottom. Check the cable connected to the terminal block for the limit switch. The issue may be that timer T2 is not activating even when the cylinder slider is at the top, or there's an erroneous or missing 'DETECT UPPER LIMIT' signal.
A
Amanda PhillipsAug 20, 2025
How to fix liquid leaking from bottom plate of cleaning chamber in YOKOGAWA FLXA202 Measuring Instruments?
- S
  spattersonAug 20, 2025
  If liquid keeps leaking from the bottom plate of the cleaning chamber in your YOKOGAWA Measuring Instruments, even after replacing the gasket and adjusting the stopper height, the spring may be deteriorated (corroded), reducing its pressure. Visually inspect the spring and replace it if defective.

Summary

INTRODUCTION AND GENERAL DESCRIPTION

1.1 Instrument check

WIRING AND INSTALLATION

2.1 Installation site

COMMISSIONING OF pH;ORP

4.1 Sensor setup

CALIBRATION OF pH;ORP

5.1 pH calibration

Calibrate the pH sensor using manual, automatic, or sample modes with buffer solutions for accurate measurements.

COMMISSIONING OF SC (Conductivity)

7.1 Measurement setup

CALIBRATION OF SC (Conductivity)

8.1 Cell constant (manual)

Fine-tune or recalibrate the sensor's nominal cell constant using a known conductivity solution.

COMMISSIONING OF ISC (Inductive Conductivity)

10.1 Measurement setup

CALIBRATION OF ISC (Inductive Conductivity)

11.1 Cell constant (manual)

Calibrate the sensor's cell constant manually using a solution with known conductivity.

COMMISSIONING OF DO (Dissolved Oxygen)

13.1 Sensor setup

CALIBRATION OF DO (Dissolved Oxygen)

14.1 Air calibration

Perform air calibration, the easiest method, to adjust the dissolved oxygen sensor's span.

COMMISSIONING OF SENCOM pH;ORP

16.1 Sensor setup

CALIBRATION OF SENCOM pH;ORP

17.1 pH calibration

Calibrate the SENCOM pH/ORP sensor using manual, automatic, or sample modes with buffer solutions.

TROUBLESHOOTING

Installation of sensor module

YOKOGAWA FLXA202 Specifications

General

Display	LCD with backlight
Enclosure Rating	IP66/NEMA 4X
Material	Polycarbonate, stainless steel
Measurement Type	pH/ORP (Oxidation-Reduction Potential)
General	2-wire analyzer
Input	pH, ORP, temperature (RTD or thermocouple)
Output	4-20 mA, HART communication
Digital Communication	HART protocol
Operating Temperature	-20 to 55 °C (-4 to 131 °F)
Enclosure	IP66/NEMA 4X enclosure
Measurement Principle	Electrochemical
Measurement Range	pH: 0-14, ORP: -2000 to +2000 mV
Accuracy	pH: ±0.01 pH, ORP: ±1 mV
Output Signal	4-20 mA