TM 9-4935-282-34
803D
AS A VACUUM TUBE VOLTMETER
GENERAL SPECIFICATIONS
ACCURACY: 3% of full scale
REGULATION AND STABILITY OF 500 VOLT SUPPLY:
+0.0025% for a 10% line change
RANGE:
+0.005% per hour after 30 min. warmup
STABILITY OF METER ZERO:
+0.25% of full scale for a +10% line change
Voltage Ranges
Input Impedance
TERMINAL LINEARITY OF KELVIN-VARLEY DIVIDER:
DC:
500-0-500
50 Meg
0.0005% (5 ppm) from 0 to 0.1 of full scale
50-0-50
50 Meg
0.0005% to +0.005% (5 ppm to 50 ppm)
5-0-5
50 Meg
from 0.1 full scale to full scale
0.5-0-0.5
50 Meg
10-0-10*
10 Meg
OPERATING TEMPERATURE RANGE:
1-0-1*
10 Meg
Model 803D (Standard cell reference element)
0.1-0-0.1*
10 Meg
Within DC accuracy specifications from
0.01-0-0.01*
10 Meg
55F to 95F, derated at 0.001%/F outside
0.001-0-0.001*
1 Meg
these limits to 35F and 110F
AC:
0-500
1 Meg, 35 uuf
Within AC accuracy specifications from
0-50
1 Meg, 35 uuf
0-5
1 Meg, 50 uuf
55F to 95F, derated outside these limits
0-0.5
1 Meg, 50 uuf
to 35F and 110F as follows:
0-100**
1 Meg, 35 uuf
0-10**
1 Meg, 35 uuf
+0.003%/F up to 10 kcps
0-1**
1 Meg, 35 uuf
+0.005%/F above 10 kcps
0-0.1**
1 Meg, 35 uuf
0-0.01**
1 Meg, 50 uuf
Model 803D/AG (Zener diode reference element)
0-0.001**
1 Meg, 50 uuf
Within DC accuracy specifications from
55F to 95F, derated at 0.001%/F outside
*These ranges are obtained by using Null ranges with all
these limits to 0 F and 125 F
five voltage readout dials set to 0.
Within AC accuracy specifications from 55F to 95F,
**These ranges are obtained by the proper setting of the
derated outside these limits to 0 F and 125 F as follows:
range and null switches with all five voltage readout
dials set to 0.
+0.003%/F up to 10 kcps
+0.005%/F above 10 kcps
RELATIVE HUMIDITY:
Within specifications from 0 to 80% relative
humidity
SHOCK AND VIBRATION:
Meets requirements of MIL-T-945A
INPUT POWER:
115/230 VAC 10%, 50 - 400 cps,
80 watts (803D), 85 watts (803D/AG)
SIZE:
Cabinet: 13" high x 9-1/2" wide x 16" deep
Rack: 7" high x 19" wide x 15-1/2" deep
WEIGHT:
Cabinet: Approximately 28 lbs.
Rack: Approximately 26 lbs.
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