52 of 66 Maintenance and Troubleshooting - 3654 Portable H2/N2 Analyzer
Operator Manual
ORBISPHERE
6.5.5 Analog Voltages View
The Troubleshooting, Analog Voltage View gives a real-time look at voltages used by
the system to transmit information about gas, 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:
• Gas channel: between +0.1 V and +4 V, depending on the gas being measured
• Temperature channel: +10 mV to +4 V
• Pressure channel: -100 mV to +100 mV
The POINT window on the right side of the gas channel voltage, is a parameter useful for
troubleshooting by Hach Ultra support technicians. It cannot be set or updated locally.
6.5.6 Measurements View
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.
The Troubleshooting, Measurements View
confirms, on your PC monitor, what your
analyzer should be displaying on the LCD for gas
concentration and sample temperature.
Choose Cancel to exit from this display.