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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.
500
DC MILLIVOLTS
PENN-BASO CONTROLS
JOHNSON CONTROLS, INC
WATERTOWN, WI., U.S.A
44549-8
Gas Valve
Figure 6: Dropout Testing Connection Diagram
© 2019 BASO Gas Products
Part No. BASO-AN-Y99AB, Rev. B
MILLIAMPS
0-500
0-1000 0-50
44549-7
MILLIVOLTS
ADJUST
MILLIVOLTS
MILLIAMPS
Reset
Button
H17
Y99AB-4 BASO® Test Kit
Table 2: Milliampere Dropout Range
BASO Control
Part Number
H15A_, H15C_, H15D_, H15H_
H15E_, H15F_
H17_A
H17_B
H19A_
H19ME
H19L_, H19N_, H19R_, H19T_
H43AA, H43BA, H43GA
H43AB, H43BB
G92 (All models except
G92CAA-19 and G92CBA-10)
G92CAA-19 and G92CBA-10
G93
G292
L61LL
L62AA
L62GB
mA Range of Power
Unit Assembly
Low
High
100
300
60
150
100
300
50
165
100
300
45
165
100
300
100
300
50
165
100
300
100
200
100
300
100
300
75
200
100
300
100
300
www.baso.com
4
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