Teledyne 6000B - Photometric analyzer - Manual (Page 41)

Photometric Analyzer Operation 3
Part I 3-15 Teledyne Analytical Instruments
OUTPUT: 4 MA and OUTPUT: 20 MA can be toggled by moving on
that field and pressing the Up or Down key. 4 mA output should be calibrat-
ed first and 20 mA output afterwards.
4. Select OUTPUT: 4 MA and press the Enter key
Use UP/DOWN arrow to
Adjust 4 ma: 250
The number on the second row is the setpoint of the 4 mA output. It is
analogous to a potentiometer wiper. The number can be set anywhere from 0
to 500. The default is 250, in the middle. At the default setting, the output
should be very close to 4 mA. If not, slowly adjust the number using the Up or
the Down keys until DMM reads 4.00 mA. Press the Enter key when done.
5. Now select OUTPUT: 20 MA and press the Enter key. A
screen similar to the one above will appear and the DMM should read close to
20 mA. If not, slowly adjust the number using the Up or Down key until DMM
reads 20.0 mA. Press the Enter key when done.
The range of adjustment is approximately +/- 10% of scale (+/- 1.6 ma).
Since the 4 to 20 mA output is tied to the 0 to 1 volt output, this function can be
used to calibrate the 0 to 1 volt output, if the 4 to 20 mA output is not used. By
using a digital Volt meter on the 0-1 Volt output.
3.3.12 Model
This selection in the System menu flashes for a few seconds the model
number and the software version installed in this instrument.
3.3.13 Show Negative
The analyzer defaults to not to show negative readings on the analyze mode
only. This affects the analog outputs too by pressing the UP or DOWN key, the
analyzer can be set to display negative readings, on the SHOW_NEG field of
the system menu.
3.4 The Zero and Span Functions
The Model 6000B can have as many as three analysis ranges plus a
special calibration range (Cal Range). Calibrating any one of the ranges will
automatically calibrate the other ranges.
CAUTION: Always allow 4-5 hours warm-up time before calibrat-
ing, if your analyzer has been disconnected from its