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TYPICAL VOLTAGE & CURRENT MEASUREMENT APPLICATIONS (Cont’d)
VOLTAGE & CURRENT MONITORING OF A DC MOTOR ?
It is desired to monitor the power supply voltage and load current of a 120
volt DC motor. The maximum load current is 100 amps.
The Apollo DC Voltmeter, Model APLVD, is configured for the 199.9 V
calibrated range by connecting the “ ÷ 100” (Terminal 5) to the 1.999 V basic
input (Terminal 8). The “COMM.” (Terminal 3) is connected to the negative
terminal of the power supply and the “ V IN ” input (Terminal 7) is connected
to the positive terminal of the power supply. The resolution of the display is
0.1 V, therefore “D.P.1” is selected.
The Apollo DC Current Meter, Model APLID, is configured by simply
connecting the “COMM.” (Terminal 3) and the “199.9 mV” basic input
(Terminal 9) to the sense terminals of the external 100 amp current shunt (AP-
SCM-100). The external shunt is then connected in series with the negative
terminal of the power supply. The resolution of the display is 0.1 amp,
therefore “D.P.1” is selected.
The Apollo volt and current meters will now indicate the power supply
voltage and load current of the DC motor precisely.
? Note: For high AC currents, it is recommended that the Model APLIT be used with a current transformer.
TROUBLESHOOTING
For further technical assistance, contact technical support at the appropriate company numbers listed.
ORDERING INFORMATION
MODEL NO.
DESCRIPTION
PART NUMBERS
230 VAC 115 VAC
**APLVD
**APLVA
**APLID
**APLIA
Apollo DC Voltmeter
Apollo AC Voltmeter
Apollo DC Current Meter
Apollo AC Current Meter
APLVD410
APLVA410
APLID410
APLIA410
APLVD400
APLVA400
APLID400
APLIA400
*10 amp Current Shunt
*100 amp Current Shunt
APSCM010
APSCM100
For more information on Pricing, Enclosures, & Panel Mount Kits, refer to the RLC Catalog or
contact your local RLC distributor.
* Voltage drop at full current = 100.0 mV maximum. Continuous current should not exceed 115% of rating.
** Units are shipped calibrated to the following readings:
MODEL NO.
DISPLAY @ INPUT
APLVD
APLVA
APLID
APLIA
1999
1999
1999
1999
@
@
@
@
1.999
1.999
199.9
199.9
VDC
VAC
mVDC
mVAC
6
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