Watts HF scientific 28052, Owner'S And User'S Manual, Page: 60 / 67

Catalog No. 29290 53
Rev 3 06/2020
6.0 Troubleshooting
6.1 MTOL+ Fault Detection
The MTOL+ performs continuous diagnostic monitoring. In the MTOL+ there are
three levels of fault detection:
1. Warnings
2. Errors
3. Failures
Any faults are displayed in a queue form in the bottom row of the LCD. How
these faults are indicated depends on the settings made in sections 4.2.1
Configuring the Error Level
and 4.2.4
Configuring the Alarms.
If ERLV is set to OFF and Alarms are not set to Error, there will be no remote
indication of a problem.
6.1.1 Warnings
If the desiccant becomes saturated, only a screen warning of DESC will
appear and but alarms will be activated. Other warnings are ALM1 or
ALM2 will be displayed if an alarm is set and the threshold is exceeded.
6.1.2 Errors
An error indicates a failure or a problem that usually can be corrected by
the operator. These errors consist of:
•
LAMP - Lamp out
•
MA - 4-20 mA loop open
•
FLOW - If option equipped, enabled and no flow
•
CLN - MTOL+ is equipped with ultrasonic cleaning and message
will indicate that the ultrasonic transducer is not making contact or the
flow through has been removed
If any of these errors occur DO NOT rely on displayed readings. These
errors affect accuracy and reliability of instruments readings.
6.1.3 Failures
A failure is a system fault. This is NOT a problem that the operator can
correct, and the unit must be returned to the factory for service. These
failures consist of failures in the CPU, A/D, EEPROM or other devices
internal to the instrument. The word FAIL will display on the lower row.