b. Null Detector.
(a) Dc. 3% of range.
(a) Input range (AC and DC). Null ranges.
voltage ranges listed under Ac accuracy as a dif-
(b) 1v. 0.001, 0.01, 0.1v.
(c) 10v. 0.0001, 0.01, O.lv.
g. Electrical Design. Completely solid state.
(d) 100v. 0.01, 0.1, 1, 10v.
h. Reference Element. T e m p e r a t u r e c o m -
(e) 1000v. 0.1, 1, 10, 100v.
i. Regulation of 1100-volt Reference Supply.
ranges except 10 megohms minimum on 0.01 and
0.0005% for a 10% line voltage change.
0.001 volt ranges.
j. Recorder Output. Available at rear panel
(3) Type of circuitry. E l e c t r o n i c c h o p p e r
amplifier with synchronous demodulation.
k. Polarity. Reversible via front panel switch,
c. Accuracy (10% overrange of capability).
input posts are not reversible.
(1) Dc: (0.01% of input + 0.001% of range
l. Warm-up Time. Less than 1 minute, normal
+ lO uv) from 0 to 1100 vdc at 23 C +2 C, up to
80% relative humidity (R.H.).
(2) Ac (% of input) at 23 C 2 o C; less than
m. Stability of ll00 volt Reference Supply. 1 0
ppm/hr; 20 ppm/day; 40 ppm/month; 90 ppm/year.
(a ) 50 Hz to 10 kHz; 0.001 to 500V: (.05%
n. Common Mode Rejection.
+ 25 uv).
(1) Dc. 120 db (1 uv/volt of common mode
(b) 50 Hz to 10 kHz; 500 to 11OOV: 0.1%.
(2) Ac. Up to 100 v peak-to-peak 50-500 Hz
(f) 2 0 k H z t o 5 0 k H z ; 0 . 0 0 1 t o 1 1 O V ;
( 0 . 1 5 % 0 + 25uv).
produces no measurable instrument error.
o. Temperature Range.
(g ) 20kHz to 50kHz; 110 to 11OOV: O.5%.
(1) Storage. - 4 0 C to +70 C .
(h) 10kHz to 100kHz; 0.001 to 11OV:
(2) Operating. 10C to 40 C. Derate dc ac-
curacy outside these limits to 0C and 50oC at 15
(i) 50kHz tQ 100kHz; 110 to 11OOV: 1.0%.
0.005%. of dial
d. Kelvin-Varley Divider.
ppm/C. Derate ac accuracy outside these limits to
0C and 50C at 40 ppm/C.
setting above 1/10 of full scale, Derate 15 ppm/C
from 0C to 10oC and from 40oC to 50C.
(3) Humidity. Up to 80 RH below 25oC; up to
70% RH above 25C.
(1) Meter. 10 uv maximum (1 ppm of range
p. Input Power. 115-/230 volts ac 10%, 50 to
above 1v, 10 ppm of lV range).
500 Hz. Rear panel switch for changing from 115-
volt ac to 230-volt ac operation. ON-OFF switch on
(2) Voltage dial. 10 uv maximum (10 ppm of
front panel and fuse on rear panel. Power cord 68-
inches long with 3-wire grounding plug.
q. Size. 17-inches wide x 3 1 /2-inches high x 14-
1/2-inches deep. (19 inches wide after installation of
rack mounting brackets.)
r. Weight. 12 1/2 pounds.
No internal fans. Will operate
satisfactorily without overheating for 24 hours when
restricted on all sides and the rear with clearance of
two inches. Brackets are used for rack mounting.
1-9. Items Comprising
An Operable Equipment
Electronic Voltmeter ME-2O2C U comprises an