Application Guide

Table Of Contents
Section 5877 User Instructions
Issue AQ, January 15, 2013 Spec. No. 582140000 (Models 802NLDB, 802NLEB and 802NL-B)
Page 6-26 Chapter 6. System Troubleshooting and Repair
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ADDING A BATTERY CHARGE DIGITAL TEMPERATURE
COMPENSATION PROBE TO A PREVIOUSLY OPERATED
SYSTEM
This procedure details the steps to add a Battery Charge Digital Temperature
Compensation Probe to a system that has been previously started, configured, and
checked.
Procedure
1) Refer to the separate Installation Manual, “Chapter 3. Making Electrical
Connections”, and mount the Battery Charge Digital Temperature Compensation
Probe near the batteries.
2) Refer to the separate Installation Manual, “Chapter 3. Making Electrical
Connections”, and connect the Battery Charge Digital Temperature
Compensation Probe to the system. The MCA automatically detects the probe
and adds it to the inventory without any alarms. The default slope setting is NO
TEMPERATURE COMPENSATION.
3) Refer to “Chapter 4. MCA System Adjustments” of these instructions, and set the
following digital battery charge temperature compensation parameters: SLOPE,
MAXIMUM COMPENSATION, and MINIMUM COMPENSATION.
4) Refer to “Chapter 4. MCA System Adjustments” of these instructions, and set the
following alarm parameters: HIGH TEMPERATURE #1 ALARM, HIGH
TEMPERATURE #2 ALARM, LOW TEMPERATURE #1 ALARM, and LOW
TEMPERATURE #2 ALARM.
5) Verify that battery charge temperature compensation has begun by comparing
the SYSTEM voltage reading versus the FLOAT setting. Depending on the
battery ambient temperature, the SYSTEM voltage should be higher or lower
than the FLOAT setting by the amount of slope V/ºC (note that SYSTEM voltage
will also vary from the FLOAT setpoint depending on the load).
Note: At 25ºC, the battery charge temperature compensated SYSTEM voltage
equals the FLOAT voltage setting.
Note: If the probe is disconnected or fails, a major alarm (local and extended)
activates and the system returns to the FLOAT voltage setting.