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Teledyne API Model 200AU NO
X
Analyzer Instruction Manual, 02293, Rev. F
9-41
9.3.3.1 ADC/DAC Calibration Procedure
Due to the stability of modern electronics, this procedure should only need to be performed if a
major sub-assembly is exchanged or when the display voltage does not match the input voltage
or current to the V/F card. After completion, a Factory Calibration Procedure should be
performed, see Section 9.1.6.
Before the actual calibration is performed, switches on the V/F card must be correctly set and
jumpers set on the motherboard. Jumper and switch setting changes must be performed with
the instrument power OFF.
Motherboard Jumpers
The motherboard contains 4 pairs of jumpers JP1 - JP8, one pair for each analog output channel.
Each channel can be configured for either voltage or current output. Use Table 9-7 to configure
the jumpers.
Table 9-7: Motherboard Jumper Settings
Analog output
Terminal Pair
Rear panel
Jumper
Pair
Jumper Setting for
Voltage Mode
Jumper Setting
for Current Mode
DAC 0 - NOx 3-4 JP3 - JP4 B-C A-B
DAC 1 - NO 5-6 JP1 - JP2 B-C A-B
DAC 2 - NO2 1-2 JP5 - JP6 B-C A-B
DAC 3 - TEST 7-8 JP7 - JP8 B-C A-B
V/F Board Switch Settings
There are 2 different types of current outputs, Non-Isolated and Isolated. Each requires a different switch
setting shown below. If you are operating the instrument in voltage output mode, the switches should be
set to the desired voltage range.