Scanner 1141 Hardware User Manual
64
Figure 5.1—Transmitter test points on the 1141 main board
NVRAM Lithium Battery Voltage
The NVRAM lithium battery must register above 2.0 VDC when using ScanWin version 3.0.0 and
higher with firmware version 4.3.5 and above. When measuring the NVRAM battery voltage with a
voltmeter (this measurement can be performed with the battery in the holder while the Scanner is
operating), the voltage will be 0.3 to 0.7 volts higher than when it is measured by the firmware. The
value read by the Scanner firmware is the actual (backup) voltage applied to the NVRAM and PIC (for
operation as an RTC) and includes the voltage drops from the Schottky diodes that are part of the non-
incendive circuit.
Note that with lithium batteries, the voltage drops off dramatically so there is never much of a “low
voltage” warning. A NVRAM battery voltage above 2.0 VDC indicates the configuration is still backed
up; a voltage of zero means that the battery is dead, not installed, or the jumper is missing.
NVRAM Battery Change Procedure
The following steps outline the procedure for changing the NVRAM / lithium backup battery in the
Scanner 1141. The battery will last between 7 and 10 years under normal usage.
1.
Use ScanWin to download all configuration, calibration and historical data from the Scanner
RTU.
2.
Turn off the Scanner 1141 RTU by moving the
Power
switch (SW9) to the “down” or OFF
position.
3.
Disconnect the power supply to the Scanner 1141.
4.
Lift the clip that holds the lithium backup button cell battery in the upper left-hand corner of the
board and remove the battery. Replace it with a 3.6V lithium button cell battery, noting the
correct polarity.
5.
After ensuring that all connections have been made, restore power to the unit following the
startup procedure on page
6.
Restore the configuration to the unit with ScanWin.
Содержание NUFLO 1141C
Страница 1: ...Manual No 30165009 Rev 01 NUFLOTM Scanner 1141 RTU Hardware User Manual ...
Страница 19: ...Chapter 3 Main Circuit Board Wiring 19 Figure 2 5 Components of 1141C Figure 2 6 Components of 1141L ...
Страница 28: ...Scanner 1141 Hardware User Manual 28 Figure 3 1 Scanner 1141 main circuit board ...
Страница 39: ...Chapter 3 Main Circuit Board Wiring 39 Wiring Diagram Summary Figure 3 7 Main circuit board wiring summary ...
Страница 66: ...Scanner 1141 Hardware User Manual 66 ...
Страница 67: ...Chapter 6 Parts List and Order Code 67 Chapter 6 Parts List and Order Code Scanner 1141C ...
Страница 68: ...Scanner 1141 Hardware User Manual 68 Scanner 1141L ...
Страница 69: ...Chapter 6 Parts List and Order Code 69 Scanner 1141G ...
Страница 91: ...Appendix A Specifications 91 Outline Dimensions Scanner 1141C ...
Страница 92: ...Scanner 1141 Hardware User Manual 92 Scanner 1141L Front and Side Views ...
Страница 94: ...Scanner 1141 Hardware User Manual 94 Scanner 1141G ...
Страница 96: ...Scanner 1141 Hardware User Manual 96 Drawing 1 Installation ...
Страница 97: ...Appendix B Control Drawings 97 Drawing 2 Power Supply ...
Страница 98: ...Scanner 1141 Hardware User Manual 98 Drawing 3 Communications Serial Ports ...
Страница 99: ...Appendix B Control Drawings 99 Drawing 4 Status Pulse Inputs Outputs ...
Страница 100: ...Scanner 1141 Hardware User Manual 100 Drawing 5 RTD Inputs Analog Inputs Outputs ...
Страница 101: ...Appendix B Control Drawings 101 Drawing 6 Analog Outputs ...
Страница 102: ...Scanner 1141 Hardware User Manual 102 ...
Страница 117: ...117 ...
Страница 118: ...118 ...
Страница 119: ......
Страница 120: ......