4
Y99AB-4 BASO Test Kit Application Note
Dropout Testing
Refer to Figure 8 through Figure 10 for typical
thermocouple-operated gas valve,
electrically-operated gas valve, and safety shutoff
device connection diagrams.
Perform the following procedure using the
milliammeter for dropout testing.
1. Shut off the gas at the main manual shutoff
valve.
2. Disconnect the thermocouple lead from the
BASO control.
3. Connect the test cable lead 44549-7 to the
milliamperes jack on the test kit meter, connect
the other end to the BASO control
(see Figure 6).
4. Set the slide switch on the meter to the 0-500
(50 on scale) position.
5. Turn the adjust knob on the meter clockwise to
the full scale deflection of the needle. Reset the
control by pressing in the reset button on the
control firmly.
6. Turn the adjust knob on the meter
counterclockwise slowly until the BASO control
power unit releases. The milliampere reading at
the moment of release is the dropout point of the
BASO power unit. Take two more readings by
the same process, and average the readings.
The milliampere dropout point must lie within the
high and low range listed in Table 2.
7. Pilot and main burner should extinguish within a
few seconds. If flames do not extinguish, refer to
the Troubleshooting section.
44549-8
H17
Gas Valve
Reset
Button
44549-7
MILLIAMPS
MILLIVOLTS
20
0
10
10
0
300
DC MILLIVOLTS
PENN-BASO CONTROLS
500
700
90
0
30
40
50
MILLIAMPS
0-500
0-1000 0-50
MILLIVOLTS
JOHNSON CONTROLS, INC
WATERTOWN, WI., U.S.A
ADJUST
Figure 6: Dropout Testing Connection Diagram
Table 2: Milliampere Dropout Range
mA Range of Power
Unit Assembly
BASO Control
Part Number
Low
High
H15A_, H15C_, H15D_, H15H_
100
300
H15E_, H15F_
60
150
H17_A
100
300
H17_B
50
165
H19A_
100
300
H19ME
45
165
H19L_, H19N_, H19R_, H19T_
100
300
H43AA, H43BA, H43GA
100
300
H43AB, H43BB
50
165
G92 (All models except
G92CAA-19 and G92CBA-10)
100
300
G92CAA-19 and G92CBA-10
100
200
G93
100
300
G292
100
300
L61LL
75
200
L62AA
100
300
L62GB
100
300
