Signal Output
Signal attenuation
73
Thus, signal output level at the +1 mV analog output may be set
separately from that at the +1 V output.
Table 5•2gives values permitted for either function, and the output
affected.
Permitted
Affected Output
0 to 13 Both +1 mV & +1 V
0 TO 10 Only +1 mV
,
SetpointsKey
RANGE 2 ()
ATTN 2 ()
ON
OFF
Table 5-2. Valid Setpoints for and
RANGE 2 () ATTN 2 ()
Note:
ATTN 2 ()
functions only for the +1 mV output, and acts on the
signal after it has been ranged by
RANGE 2 ()
.
Generally, if both an integrator or A/D converter (+1 V output) and chart
recorder (+1 mV output) are connected to the same signal channel,
RANGE 2 ()
should be set properly first for the integrator or computer,
then
ATTN 2 ()
set appropriately for the chart recorder.
To minimize integration error for an integrator or A/D converter,
RANGE 2 ()
normally should be set to the lowest value possible, provided
the largest peaks of interest do not exceed 1 volt. Attenuation functions
at the integrating device or computer are then used to ensure that plotted
peaks remain on scale.
RANGE 2 ()
selects and sizes a portion of the full dynamic range for the
signal source assigned to an output channel. The portion selected is sized
such that the highest possible value for the portion does not exceed
maximum output voltage allowed for the given output (+1 mV or +1 V).
ATTN 2 ()
further selects and sizes a portion of the ranged signal for
the +1 mV output to ensure that the signal does not exceed +1 mV.
