An OMEGA Te ch n o lo gie s Co m p a n y
DP18 Series
Model DP18-RT1
True RMS Ammeter
INSTRUCTION
SHEET
M2107/1294
True RMS Ammeter for current transformer X/5
3½DIGITSACAMMETER,TRUE-RMSVALUES,WITHSELECTABLERANGESONTHESIGNALCONDITIONERBYPLUG-INJUMPERS.THE
READINGCANNOTBEMODIFIEDINENGINEERINGUNITS,UNLESSTHEAMPLIFIERISMODIFIED.THEREFOREUSINGTHESTANDARD
AMPLIFIERTHEDISPLAYWILLSHOWTHEVALUESINDICATEDONTHETABLE.THEINPUTALLOWSDIRECTCONNECTIONTOACURRENT
TRANSFORMER(CT)WITHA5Aac.SECONDARY,WITHOUTNEEDFORANINTERMEDIATESTEPDOWN.
FRONTVIEW
FIG. 1
SPECIFICATIONS
½
DISPLAYS . . . . . . . . . . . . . . . . . . . . . .
HEIGHT . . . . . . . . . . . . . . . . . . . . . . . . 0.56" (14.2 mm.)
SYMBOLS . . . . . . . . . . . . . . . . . . . . . . 1.8.8.8
3
digits, 7 segment, red LED
DECIMALPOINTS . . . . . . . . . . . . . . . . Selectable by jumpers
OVERRANGEINDICATION . . . . . . . . . Display flashes 1999
SPAN
OFFSET
INPUTCONFIGURATION . . . . . . . . . . . Bipolar single
ZERO . . . . . . . . . . . . . . . . . . . . . . . . . Automatic
SPANADJUSTMENT . . . . . . . . . . . . . . ± 5 %
SPAN:ADJUSTTHEMAXIMUMREADING.
OFFSET:NOTINSERVICE
SPAN ADJUSTMENT IS ACCESSIBLE BEHIND THE LOW DOOR.
CONVERTER . . . . . . . . . . . . . . . . . . . . Dual-slope, average value
SIGNALINTEGRATIONPERIOD . . . . . 80 ms.
REARVIEW
READRATE . . . . . . . . . . . . . . . . . . . . 3.12 / sec.
RANGES . . . . . . . . . . . . . . . . . . . . . . . See table selection fig. 3
HOLD . . . . . . . . . . . . . . . . . . . . . . . . . Optional
Setpoint R1
(option)
Setpoint R2
(option)
FIG. 2
Isolated digital output
(option)
NOISEREJECTIONNMR . . . . . . . . . . . 50 dB. 50/60 Hz.
ACCURACY . . . . . . . . . . . . . . . . . . . . 0.2 % ± 1 count
WARMUPTORATEDACCURACY . . . 2 minutes
SPANTEMPCO . . . . . . . . . . . . . . . . . . 150 ppm.
ZEROTEMPCO . . . . . . . . . . . . . . . . . . 2.5 µV/°C.
D
C
B
A
SIGNAL
INPUT
1
10
OPERATINGTEMPERATURE . . . . . . . 0 to 50 °C (32 to 122 °F)
STORAGETEMPERATURE . . . . . . . . . -40 to 80 °C (-40 to 176 °F)
WEIGHT . . . . . . . . . . . . . . . . . . . . . . . . 310 gr. (0.68 lb)
CASEMATERIAL . . . . . . . . . . . . . . . . ABS, DIN 43700, black color
STANDARDPOWER . . . . . . . . . . . . . . 115 Vac. ± 10 %, 50/60 Hz.
POWERCONSUMPTION . . . . . . . . . . . 5.5 VA for AC.
+
ANALOG OUTPUT
(OPTION)
-
HOLD, latch the reading
display, while these pins
are linked
POWERSUPPLY
see instrument label
ELECTRICALCONNECTIONS . . . . . . . Push-in cable connectors
BURN-IN . . . . . . . . . . . . . . . . . . . . . . . 24 h.
RANGESELECTION
FIG. 3
D
F
B
IC2
A
C
E
G
C
B
A
SIGNALINPUT
5 Aac.
SIGNALCONDITIONER
COMPONENTSVIEW
S1SELECTOR
I NOMINAL
Amp.AC
READING
Amp.AC
RESOLUTION
Amp.AC
I NOMINAL
READING
RESOLUTION
CLOSE
CLOSE
PLACETHEPLUG-INJUMPERONTHE
SELECTOR S1, IN FUNCTION OF THE
Amp.AC
Amp.AC
JUMPER
Amp.AC
JUMPER
NOMINAL
TRANSFORMER, AND THE DECIMAL
POINT JUMPER ON THE
CORRESPONDINGPOSITION(FIG. 5).
TO OBTAIN THE INDICATED PERFOR-
CURRENT
0.1
5
5.00
F
150
400
150.0
400
B
0.01
10
10.00
C
G
15
40
15.0
40.0
50.0
60.0
75.0
100.0
B
G
F
500
600
500
600
F
E
D
C
B
A
MANCE,
USE
CURRENT
TRANSFORMERS CLASS 0.5 OR
BETTER
50
750
750
0.1
1
60
E
D
C
1000
1500
2000
1000
1500
1999
75
100
CCD1294APC2BA
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