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40 of 50 Maintenance and Troubleshooting - 3650 Portable O2 Analyzer
Operator Manual
ORBISPHERE
6.2.5 Analog Voltages View
The Troubleshooting, Analog Voltage View gives a real-time look at voltages used by
the system to transmit information about sensor current, temperature and pressure. This
is useful when trying to identify an instrument problem with a Hach Ultra service
representative either on-site or over the phone.
The voltage limits for normal operation are:
• Current channel: -1.5 V to +1.5 V
• Temperature channel: +10 mV to +4 V
• Pressure channel: -100 mV to +100 mV
The Range window on the right side of the Current channel voltage indicates one of the
four instrument ranges: 0 (less sensitive) to 3 (most sensitive).
6.2.6 Measurements View
The Troubleshooting, Measurements View confirms, on your PC monitor, what your
analyzer should be displaying on the LCD for gas concentration and sample
temperature.
When performing this test, if the system
is over-range, you may receive a
message that states, for example, The
current input is saturated.
Similar messages will also appear, to
warn when temperature and pressure
limits are exceeded.
Fig 6-5: Analog Input Test
Choose Cancel to exit from this display.
Fig 6-6: Measurements View