Emerson Rosemount 4600 Reference Manual page 37

Reference Manual
00809-0100-4022, Rev GA
Figure 3-3. Power Supply Load Limitations, 4–20 mA Transmitters
Maximum field loop Resistance = 43.5 * (Power Supply Voltage - 11.25)
1355
1000
*Communication requires a minimum loop resistance of 250 ohms.
Surges/transients
The transmitter will withstand electrical transients of the energy level usually encountered
in static discharges or induced switching transients. However, high-energy transients, such
as those induced in wiring from nearby lightning strikes, can damage the transmitter.
Optional transient protection
Transient protection can be ordered as a factory installed option (Option Code T1 in the
transmitter model number). Transient protection can not be added to units ordered
without the T1 option.
3.5.4 Zero the transmitter
Performing a zero adjustment is a recommended step for sealed gauge transmitters.
Note
Do not re-zero absolute transmitters.
Re-zeroing the transmitter allows for a single point adjustment to compensate for any
mounting position and sealed gauge effects. This can be done with a zero trim (See
trim" on page
Installation
www.aotewell.com
500
Operating
Region
0
20
11.25 30
42.4
Voltage (V dc)
40), 4-20 mA rerange or with the zero and span adjustments.
sales@aotewell.com
Industry Automation
Installation
September 2016
"Sensor
31
+86-755-8660-6182