Y99AB-4 BASO Test Kit Application Note
3
Table 1: Thermocouple Output
mV Range
Thermocouple
Lead
Turndown
Normal
Not Less Than
Minimum Fixed Load
Adapter Voltage
K14
4 mV
20-28
15
8
K15
4 mV
20-28
15
8
K16
4 mV
25-35
17
8
K19
4 mV
25-35
17
8
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).
DC MILLIVOLTS
PENN-BASO CONTROLS
0
10
20
30
40
50
100
300
500
700
900
MILLIAMPS
0-500
MILLIVOLTS
0-1000 0-50
ADJUST
MILLIVOLTS
MILLIAMPS
44549-8
Red
Black
Shorting
Jumper Clip
Thermocouple
Lead
64119-1D
Adapter
Assembly
Figure 5: Fixed Load Millivolt Reading Connection
Diagram
