Teledyne 3010TAC Operating Instructions Manual page 80

4 Maintenance
4-4: Part II
0 OK
1 DAC A (0–1 V Concentration)
2 DAC B (0–1 V Range ID)
3 Both Failed
Preamp
0 OK
1 Zero too high
2 Amplifier output doesn't match test input
3 Both Failed
Teledyne Analytical Instruments
Model 3010TAC