Filter
Top Products
65
MODEL SOLU COMP II SECTION 8.0
TROUBLESHOOTING
SECTION 8.0
TROUBLESHOOTING
8.1 OVERVIEW
8.2 TROUBLESHOOTING USING FAULT CODES
8.3 TROUBLESHOOTING WHEN NO ERROR MESSAGE IS SHOWING — pH
8.4 TROUBLESHOOTING WHEN NO ERROR MESSAGE IS SHOWING — CONDUCTIVITY
8.5 TROUBLESHOOTING WHEN NO ERROR MESSAGE IS SHOWING — GENERAL
8.6 SIMULATING INPUTS — pH
8.7 SIMULATING INPUTS — CONDUCTIVITY
8.8 SIMULATING TEMPERATURE
8.9 MEASURING 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
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.
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