Nautel NV30 Operation And Maintenance Manual

Also see for NV3.5: Troubleshooting manual

Nautel NV30 Operation And Maintenance Manual Manual pdf 135 page image

NV30/NV40 Operations and Maintenance Manual Routine maintenanceIssue 3.3 2014-12-10 Page 3-7Replacing the NVE exciter PWB batteryReplace the battery on the applicable exciter’s NVE exciter PWB (A3A1 or A4A1) once a year, orwhenever the Exciter A/B- Low Backup Battery alarm appears (on the AUI or via remote digitaloutput). Chemical leakage from an old battery can cause damage. Also, the NVE exciter PWB’smicrocontroller may not retain its settings if ac power is turned off while the backup battery power islow. The battery should be replaced while ac power is applied to the transmitter.IntervalEvery 12 months.Parts and toolsReplacement battery: 3 V lithium coin cell, 20 mm (Nautel Part # BBLT01, Panasonic # CR2032).ProcedurePerform the following steps to replace the battery:1. Ensure ac power is being applied to the transmitter.2. Open the appropriate front door [left-hand door for exciter A (A3); right-hand door forexciter B (A4)] and - without disconnecting any interconnecting cables - slide the associatedexciter forward enough to remove the exciter’s cover. See Figures MD-1 in the mechanicaldrawings section at the end of the NV30/NV40 Troubleshooting Manual to locate the exciters.See Figure MD-5 to locate the NVE exciter PWB (A1).3. Gain access to the appropriate exciter’s NVE exciter PWB (A3A1 or A4A1) by removing thecover.4. Replace the battery in XBT1 on the NVE exciter PWB.5. Close the appropriate front door.6. Check for any alarms on the AUI. Battery related alarms should clear. (See “Viewingtransmitter status” on page 2-59.)