Digital Panel Voltmeter / Ammeter / Frequency Meters
DESCRIPTION

Digital Panel Meters operate on the principle of dual slope integration. It is available in two types i.e.
3½ digit & 4½ digit. Digital frequency meter incorporates microcontroller with crystal oscillator to display the frequency. It is available in 4 digit type.

FEATURES
• Low cost.
• Seven segment red & green colour LED display with 0.5" & 1 " size.
• AC current input is incorporated with builtin CT of 1Amp or 5Amp for isolation.
• High accuracy.
• AC / DC signal measurement

ELECTRICAL SPECIFICATIONS
Parameters Type
Digital panel meter Digital frequency meter
3 ½ digit 4 ½ digit 4 digit
Mounting Panel Panel Panel
Measuring Range - Voltage 0 - 650V AC 0 - 650V AC 600V AC
0 - 700 V DC 0 - 700 V DC -
Measuring Range - Current
AC (with internal CT)
DC (with internal Shunt)		 1A / 5A
5A 		1A / 5A
5A 		-
-
Frequency 40 - 400Hz. 40 - 400Hz. 30 - 10 k Hz.
Resolution 0.001 to 1 count
depending upon
measuring range		 0.0001 to 1 count
depending upon
measuring range		 Depending upon measuring
range
ACcuracy 0.5% of f.s.d. ±2 Digits 0.2% of reading ±2 Digits
Auxiliary Supply 63.5V / 110V / 240AC ± 10% 63.5V / 110V / 240V AC
± 10%
VA Burden for Aux. supply Less than 4VA Less than 4VA
Input impedance for voltage 1 Mohms 1 Mohms
VA Burden
Current
Voltage 		0.5VA
1VA 		-
1VA
Insulation resistance Greater than 20 Mohms at 500V DC Greater than 20 Mohms at
500V DC
Dielectric test 2kV RMS for 1 minute. 2kV RMS for 1 minute.
Operating temperature 0°C to 55°C 0°C to 55°C
Storage temperature -20°C to 70°C -20°C to 70°C
Humidity Upto 95% RH Upto 95% RH
Sampling rate 3 samples / Sec. 3 samples / Sec.
Over range indication MSD indication "1"
& all other digits
blank. Polarity
sign is preserved.		 All digits blinking
with "0" indication
& polarity sign is
preserved. 		-
Protection IP20 IP20
Maximum indication 1999 19999 -

MECHANICAL CONSTRUCTION

MODEL A1 A2 A3 A4
SIZE (mm) 48 x 96 x 115 72 x 144 x 130 72 x 72 x 110 96 x 96 x 70
PANEL CUT OUT(mm) 45+0.6 x 92 +0.7 68+0.7 x 138+1.0 68 x 68+0.7 92 x 92+0.8
WEIGHT (approx. gms) 520 1100 375 500

Note :
• Active, reactive & apparent power indicators are to be used with external transducer.
• For AC current measurement above 5Amp, external CT is to be used.
• For DC current measurement above 5Amp, external shunts is to be used.

Ordering information
1) Type 2) Model 3) Measuring Range 4) Display height & color 5) Auxilliary supply 4) Resolution
5) Auxiliary supply 6) Resolution.
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