Analog Output Offset Adjustment; Current Loop Output Adjustment - Teledyne 100E Instruction Manual

Operating Instructions

6.7.4.4. Analog Output Offset Adjustment

Some analog signal recorders require that the zero signal is significantly different from
the baseline of the recorder in order to record slightly negative readings from noise
around the zero point. This can be achieved in the M100E by defining a zero offset, a
small voltage (e.g., 10% of span), which can be added to the signal of individual output
channels by activating the ANALOG I/O CONFIGURATION MENU (see Section 6.7.1),
then pressing:
Set the recorder
offset (in mV) of
the selected
channel

6.7.4.5. Current Loop Output Adjustment

A current loop option is available and can be installed as a retrofit for each of the analog
outputs of the analyzer (Sections 5-2). This option converts the DC voltage analog output
to a current signal with 0-20 mA output current. The outputs can be scaled to any set of
limits within that 0-20 mA range. However, most current loop applications call for either
2-20 mA or 4-20 mA range. All current loop outputs have a +5% over-range. Ranges
with the lower limit set to more than 1 mA (e.g., 2-20 or 4-20 mA) also have a -5%
under-range.
To switch an analog output from voltage to current loop after installing the current
output printed circuit assembly, follow the instructions in Section 6.7.4.1 and select
CURR from the list of options on the "Output Range" menu.
Adjusting the signal zero and span values of the current loop output is done by raising or
lowering the voltage of the respective analog output. This proportionally raises or lowers
the current produced by the current loop option.
82
FROM ANALOG I/O CONFIGURATION MENU
DIAG
ANALOG I / O CONFIGURATION
PREV NEXT
DIAG AIO AOUTS CALIBRATED: NO
< SET CAL
SET>
DIAG AIO
CONC_OUT_2:5V, CAL
< SET SET>
EDIT
DIAG AIO
CONC_OUT_2 RANGE: 5V
EDIT
SET>
DIAG AIO
CONC_OUT_2 REC OFS: 0 mV
< SET SET>
EDIT
DIAG AIO
RECORD OFFSET: 0 MV
+ 0 0 0 0
Model 100E Instruction Manual
EXIT
ENTR
EXIT
Press SET> to select the
analog output channel to
be configured. Then press
EDIT to continue
EXIT
EXIT
Pressing ENTR accepts the
EXIT
new setting and returns to the
Pressing EXIT ignores the new
setting and returns to the
ENTR EXIT
previous menu.
previous menu.
045150102 Rev XB1