Omega Marine Instruments DP18 RT1 User Manual

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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