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Table 1: Thermocouple Output
Thermocouple
Turndown
Lead
K14
K15
K16
K17
K19
Fixed Load Millivolt Readings
Perform the following procedure for taking fixed load
millivolt readings:
1. Disconnect the thermocouple from the BASO
control and attach the adapter assembly
(64119-1D) to the thermocouple.
2. Attach the test cable lead 44549-8 to the
adapter assembly. Connect the red clip to the
copper tubing of the adapter assembly and the
black clip to the control end of the adapter
assembly (see Figure 5).
3. Set the slide switch on the meter to the 0-50 or
0-1000 position.
4. Reestablish pilot flame.
5. The millivolt reading should agree with the
values listed in Table 1 with a normal pilot flame
(see Figure 3).
Note: When taking a fixed load millivolt reading
on a junction block thermocouple, the junction
block terminal must be shorted (see Figure 4).
© 2019 BASO Gas Products
Part No. BASO-AN-Y99AB, Rev. B
Normal
4 mV
20-28
4 mV
20-28
4 mV
25-35
4 mV
30-40
4 mV
25-35
Y99AB-4 BASO® Test Kit
mV Range
Not Less Than
15
15
17
25
17
500
20
DC MILLIVOLTS
PENN-BASO CONTROLS
44549-8
Jumper Clip
Thermocouple
Lead
Figure 5: Fixed Load Millivolt Reading Connection
Minimum Fixed Load
Adapter Voltage
8
8
8
8
8
MILLIAMPS
0-500
0-1000 0-50
MILLIVOLTS
ADJUST
MILLIAMPS
MILLIVOLTS
Shorting
Black
Red
64119-1D
Adapter
Assembly
Diagram
www.baso.com
3
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