Hach 3650 manual Analog Voltages View, Measurements View

40 of 50 Maintenance and Troubleshooting - 3650 Portable O2 Analyzer

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.

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

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.

Choose Cancel to exit from this display.

Fig 6-6: Measurements View

ORBISPHERE Operator Manual