a) Before installing the new sensor, take note of the alignment of the keying
features on the sensor housing.
b) Align the tabs on the side of the sensor assembly housing.
c) Firmly push the sensor assembly into place until both tabs are fully latched to
ensure a firm seal.
3. Calibrate the new sensor.
4. Allow the transmitter to warm up before continuing.
for maximum warm up times based on gas type. During the
warm up period, the displayed values, alerts, and concentrations will not reflect
actual measurements; readings will not be transmitted.
Table 5-2: Maximum Warm up Periods
Gas type
Maximum warm up period
Hydrogen sulfide (H
2
S)
One minute
Oxygen (O
2
)
Seven minutes
Carbon monoxide (CO)
One minute
5.12
Replace the power module
Expected power module life is 5.8 years at reference conditions.
As shown in the following table, actual power module life expectancy in the field depends
upon factors such as wireless update rate, network design, environmental conditions, and
LCD settings.
CAUTION
If you do not replace the power module promptly, the device will cease to function.
Replace the power module as soon as possible after receiving a low battery warning.
You may replace the power module in a hazardous area. The power module has a
surface resistivity greater than one gigaohm, and you must install it properly in the
wireless device enclosure. Take care during transportion to and from the point of
installation to prevent electrostatic charge buildup.
(1)
Reference conditions are 70 °F (21 °C), wireless updates of once per minute, and routing data for three additional network
devices.
Operation and maintenance
Reference Manual
September 2019
00809-0100-4928
162
Emerson.com/Rosemount
Summary of Contents for Rosemount 928
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Page 106: ...Configuration Reference Manual September 2019 00809 0100 4928 106 Emerson com Rosemount ...
Page 178: ...Troubleshooting Reference Manual September 2019 00809 0100 4928 178 Emerson com Rosemount ...