Omega DP301AN, User Manual

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1.0 GENERAL INFORMATION
The two versions of voltmeters are different pinout versions of the same 3 1/2
digit panel meter for applications which require a compact, quality dc voltmeter.
Standard features include HOLD function, selectable decimal point location and
LAMP TEST.
Each model contains the circuitry for all ranges. The range is changed by
opening and closing the appropriate switches on the printed circuit board via
installation of push-on jumpers.
1.1 MODEL DP301AN
Model DP301AN is pin compatible with newer voltmeters DP302, DP3001 and
DP3002 series.
Models DP301AN has a resolution of 1 part in ±1999 counts, or 0.05% of full
scale. By using an external dc voltage reference, any of these ranges can be
configured for 3 wire ratio measurement with readout from 0 to 1.999.
1.2 MODEL DP301AN-AC
Model DP301AN-AC, for AC power line monitoring, has a screw terminal barrier
strip for signal and power. This model uses a half wave average converter
calibrated to read RMS. It offers input ranges of 199.9 and 650 V ac, with
resolution of 100 mV and 1 V, respectively. Maximum rated input in either range is
650 V RMS or 920 Vp.
2.0 SPECIFICATIONS
2.1 ANALOG INPUT
Model "AN"
Signal ranges
±199.9mV ±1.999V ±19.99V ±199.9V
Bias current 50 pA 50 pA 5 pA 1 pA
Maximum input 130 Vp 130 Vp 250 Vp 250 Vp
Resolution 100 uV 1 mV 10 mV 100 mV
Input resistance 1 G
Ω
1 G
Ω
1.1 M
Ω
1.0 M^N8,50
Configuration Differential, bipolar
Zero Automatic
Span adjustment ±5%
Model "AN-AC"
Signal ranges
199.9 V ac 650 V ac
Bias current 1 pA 1 pA
Overvoltage protection 650 V ac 650 V ac
Resolution 100 mV 1 V ac
Input resistance 1 M
Ω
1 M
Ω
Configuration Half wave average, RMS calibrated
Zero Automatic
Frequency 47 to 1000 Hz
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