MODEL SOLU COMP II

SECTION 8.0

 

TROUBLESHOOTING

SECTION 8.0

TROUBLESHOOTING

8.1OVERVIEW

8.2TROUBLESHOOTING USING FAULT CODES

8.3TROUBLESHOOTING WHEN NO ERROR MESSAGE IS SHOWING — pH

8.4TROUBLESHOOTING WHEN NO ERROR MESSAGE IS SHOWING — CONDUCTIVITY

8.5TROUBLESHOOTING WHEN NO ERROR MESSAGE IS SHOWING — GENERAL

8.6SIMULATING INPUTS — pH

8.7SIMULATING INPUTS — CONDUCTIVITY

8.8SIMULATING TEMPERATURE

8.9MEASURING REFERENCE VOLTAGE — pH

8.1 OVERVIEW

The Solu Comp II continuously monitors itself and the sensor for faults. When the analyzer detects a fault, the word fault appears in the display alternately with the measurement. If alarm 3 was configured as a fault alarm, the alarm relay will energize. The outputs do not change during a fault condition. They continue to reflect the measured pH, ORP, conductivity, resistivity, TDS, or temperature. Press to display the fault codes.

8.2 TROUBLESHOOTING USING FAULT CODES

 

Fault Code

Explanation

See Section

 

 

S1

Out of Range

Absolute value of measured voltage exceeds 2500 mV (pH/ORP only)

8.2.1

 

 

S1

Broken Glass

pH sensitive glass membrane is broken

8.2.2

 

 

S2

Open

Sensor 2

(conductivity) is open

8.2.3

 

 

S2

Shorted

Sensor 2

(conductivity) is shorted

8.2.3

 

 

TC1 Open or TC2 Open

RTD for sensor 1 or sensor 2 is open

8.2.4

 

 

TC1 Shorted or TC2 Shorted

RTD for sensor 1 or sensor 2 is shorted

8.2.4

 

 

S1 or S2 Sense Line Open

RTD sense line for sensor 1 or sensor 2 is open

8.2.5

 

 

EEPROM Failure

EEPROM failure

8.2.6

 

 

 

 

 

 

 

 

8.2.1 Absolute Value of Measured Voltage Exceeds 2500 mV

The voltage of a pH cell is usually between 600 mV and -600 mV, and the voltage of an ORP cell is between 2000 and -2000 mV. Readings outside the range -2500 mV to 2500 mV usually indicate a problem with sensor wiring or analyzer electronics.

A.If the sensor is being installed for the first time, check the wiring connections. See Section 3.2. If a junction box is being used, check connections at the junction box, too.

B.If the preamplifier is in a junction box, verify that the wires supplying the power (±5 Vdc) to the preamplifier are connected at the analyzer and junction box.

C.Verify that the sensor is completely submerged in the process liquid.

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Emerson PN 51-1055pHC/rev.K instruction manual Section Troubleshooting, Overview Troubleshooting Using Fault Codes

PN 51-1055pHC/rev.K specifications

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