Teledyne 400E, Инструкция по эксплуатации, Страница: 108 / 318

Operating Instructions Model 400E Ozone Analyzer
Instruction Manual
108 P/N 04316 Rev: B
An alternative method for setting up the Current Loop outputs is to connect a
250 ohm ± 1% resistor across the current loop output in lieu of the current meter.
Using a Voltmeter connected across the resistor follow the procedure above but
adjust the output for the following values:
Table 6-13: Current Loop Output Check
% FS
Voltage across Resistor for
2-20 mA
Voltage across Resistor for
4-20 mA
0 0.5 VDC 1 VDC
100 5.0 5.0
6.7.4.
Calibration the IZS Option O
3
Generator
This function sets the IZS O
3
Generator output to a series of levels between zero
and full scale, measures the actual O
3
output at each level then records the
generator lamp drive voltage and generator’s O
3
output level in a lookup table.
Whenever a certain O
3
output level is requested, the instrument’s CPU uses the
data in this table to interpolate the correct drive voltage for the desired O
3
output.
NOTE
Because the instrument waits 5–7 minutes at each step for
the O
3
level to stabilize, this calibration operation often takes
more than one hour to complete.