DayTronic 5D78 Руководство по эксплуатации - Страница 8
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S
PECIFICATIONS
Gain Accuracy: ±0.02% of full scale typical, following cali-
bration; see Table 1
Gain Stability: vs. temperature: ±25 ppm/°C; vs. time: ±10
ppm/month
Analog Filter: 0.2, 2, 20, 200, or 2000 Hz, selectable when the
3000PLUS meter is configured*
Status Indicator Light: Green/Yellow/Red; indicates module
input and communications status (see Section 1.D)
Table 1
Model 5D78 Full-Scale Ranges (Nominal)
and Accuracy per Excitation Setting**
(Accuracy given as % of full scale overall
expected maximum error, following calibration)
Excitation Frequency (kHz)
Range
3.27 or 5.00
(mV/V)
0.5
0.75
1
1.5
2
3
* NOTE: For the Model 5D78, the value of the highest allowed cor-
ner frequency is dependent on the currently selected excitation
frequency: for an excitation of 10.00 kHz, it is 2000 Hz; for 5.00
kHz, it is 1400 Hz; and for 3.27 kHz, it is 1100 Hz.
** See Table 2 in Appendix B for the "practical" ranges that apply to
the 5D78 RANGE (RNG) setting. The full-scale accuracies given in
Table 1 refer to the 5D78's response to substantially undistorted
waveform inputs. Any phase shift must be compensated for dur-
ing calibration (by use of the FAZ command, as explained in Sec-
tions 3.B and 4.E). Some gain deviation from transducer
data-sheet specifications is normally to be expected as a result of
loading the sensor's finite output impedance with intrinsic cable
capacitance. The degree of this error will vary with cable type and
length. Nevertheless, when calibrated "in place," a 3000PLUS
meter with installed Model 5D78 offers excellent stability and inter-
changeability of units. As long as an initially calibrated 5D78's
setup configuration is exactly transferred to the 5D78 that is replac-
ing it, no recalibration is usually required to maintain the stated
accuracy.
3000PLUS
(
'
)
CONT
D
10.00
0.04
0.06
0.03
0.04
0.02
0.03
0.02
0.02
0.02
0.02
0.02
0.02
5D78 I
WITH
NSTRUCTION
1. I
NTRODUCTION
M
. SB.3
ANUAL V
3KP78 - 1.4