User`s manual

<8. Maintenance>
8-2
IM 01C25B01-01E
Table8.1 InstrumentsRequiredforCalibration
Name Yokogawa-recommendedInstrument Remarks
Power supply Model SDBT or SDBS distributor 4 to 20 mA DC signal
Load resistor Model2792standardresistor[250Ω±0.005%,3W]
Loadadjustmentresistor[100Ω±1%,1W]
Voltmeter Model 2501 A digital multimeter
Accuracy(10VDCrange):±(0.002%ofrdg+1dgt)
Digital
manometer
Model MT220 precision digital manometer
1) For 10 kPa class
 Accuracy:±(0.015%ofrdg+0.015%ofF.S.). . . . for 0 to 10 kPa
  ±(0.2%ofrdg+0.1%ofF.S.). . . . . . . . for -10 to 0 kPa
2) For 130 kPa class
 Accuracy:±0.02%ofrdg. . . . . . . . . . . . . . . . . . . . for 25 to 130 kPa
  ±5digits. . . . . . . . . . . . . . . . . . . . . . . . . for 0 to 25 kPa
  ±(0.2%ofrdg+0.1%ofF.S.). . . . . . . . for -80 to 0 kPa
3) For 700 kPa class
 Accuracy:±(0.02%ofrdg+3digits) . . . . . . . . . . . for 100 to 700 kPa
  ±5digits . . . . . . . . . . . . . . . . . . . . . . . . for 0 to 100 kPa
  ±(0.2%ofrdg+0.1%ofF.S.). . . . . . . . for -80 to 0 kPa
4) For 3000 kPa class
 Accuracy:±(0.02%ofrdg+10digits). . . . . . . . . . for 0 to 3000 kPa
  ±(0.2%ofrdg+0.1%ofF.S.). . . . . . . . for -80 to 0 kPa
5) For 130 kPa abs class
 Accuracy:±(0.03%ofrdg+6digits) . . . . . . . . . . . for 0 to 130 kPa abs
Select a manometer having
a pressure range close to
that of the transmitter.
Pressure
generator
Model7674pneumaticpressurestandardfor200kPa{2kgf/cm
2
},25kPa
{2500mmH
2O}
Accuracy:±0.05%ofF.S.
Requiresairpressure
supply.
Deadweightgaugetester25kPa{2500mmH
2O}
Accuracy:±0.03%ofsetting
Select the one having a
pressure range close to that
of the transmitter.
Pressure
source
Model 6919 pressure regulator (pressure pump)
Pressurerange:0to133kPa{1000mmHg}
Prepare the vacuum pump
for negative pressure
ranges.
Note: The above table contains the instruments capable of performing calibration to the 0.2% level. Since special maintenance and
managementproceduresinvolvingtraceabilityofeachinstrumenttohigher-levelstandardsarerequiredforcalibrationtothe0.1%
orhigherlevel,theremaybedifcultiesincalibrationtothislevelintheeld.Forcalibrationtothe0.1%level,contactYokogawa
representativesfromwhichtheinstrumentwaspurchasedorthenearestYokogawaofce.
V
RRc
P
Using pressure
generator
Reference pressure
High pressure side High pressure side
Low pressure side
open to atmosphere
Low pressure side
open to atmosphere
Supply pressure
Pressure generator
Load resistance,
250Ω
Load
adjusting
resistance,
100Ω
Digital voltmeter
Power
supply
E
V
RRc
P
Using pressure
source with
manometer
Reference pressure
Pressure source
Model MT220
precision digital manometer
Load resistance,
250Ω
Load
adjusting
resistance,
100Ω
Digital voltmeter
Power
supply
E
F0801.ai
Figure 8.1 Instrument Connections (EJX110A, 4 to 20mA output)