SSCC APPLICATIONS & PROGRAMMING GUIDELINES
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4-23
SIG-00-22-02 JUNE 2022 (Revised September 2022)
Version: B.1
Battery
Voltage
Regulated Lamp
Drive
Voltage Range
Measurement Below Actual
Drive Voltage
Using Digital Multimeter
(Agilent U1252 or
Equivalent)
Using Analog Multimeter
(TS111)
14.7
9.0 to 12.0
2.2 volts
1.1 volts
>12.0
1.54 volts
0.77 volts
15.8
9.0 to 12.0
2.6 volts
2.0 volts
>12.0
1.82 volts
1.4 volts
Lamp voltage measurement examples follow.
4.10.1 Lamp Voltage Measurement Example 1
When setting crossing lamp voltages to 9.5 volts, the conventional meter reading is determined
by subtracting the meter variance given in Table 4-4 from the desired lamp voltage.
When using a
digital multimeter
(e.g. Agilent U1252A):
Desired lamp voltage = 9.5
Meter variance for 14.7 volt battery = -2.2
Meter reading =
7.3
When using an
analog multimeter
(e.g. TS111):
Desired lamp voltage = 9.5
Meter variance for 14.7 volt battery = -1.1
Meter reading =
8.4
4.10.2 Lamp Voltage Measurement Example 2
In this example, it is desired to check that the lamp voltage is greater than 8.5 volts and the
battery voltage is 13.3 volts.
When verifying that the lamp voltages are greater than 8.5 VDC, the conventional meter reading
is determined by subtracting the meter variance given in Table 4-4 from the minimum lamp
voltage threshold.
When using a
digital multimeter
(e.g. Agilent U1252A):
Minimum lamp voltage threshold = 8.5
Meter variance for 13.3 volt battery = -1.3
Minimum meter reading =
7.2
When using an
analog multimeter
(e.g. TS111):
Minimum lamp voltage threshold = 8.5
Meter variance for 13.3 volt battery = -0.6
Minimum meter reading =
7.9