8
U1252A SQUARE WAVE OUTPUT
OUTPUT
[1]
RANGE RESOLUTION ACCURACY
FREQUENCY 0.5, 1, 2, 5, 10, 15, 20, 25, 30, 40, 50, 60, 75, 80,
100, 120, 150, 200, 240, 300, 400, 480, 600, 800,
1200, 1600, 2400, 4800 Hz
0.01 Hz 0.005% + 2
DUTY CYCLE
[2]
0.39% ~ 99.60% 0.390625% 0.4% of full scale
[3]
PULSE WIDTH
[2]
1/Frequency Range/256 0.2 ms + Range/256
AMPLITUDE Fixed 0 ~ +2.8 V 0.1 V 0.2 V
[1] Output impedance: 3.5 kW maximum.
[2] The positive or negative pulse width must be greater than 50 ms for adjusting the duty cycle or pulse width under different frequency. Else, the accuracy
and range will be different from the defi nition.
[3] For signal frequencies greater than 1 kHz, an addition of 0.1% per kHz is added to the accuracy.
OPERATING CHARACTERISTICS
Measuring rate
Function Times/second
ACV 7
ACV + dB 7
DCV 7
AC + DC V 2
W /nS
14
Diode 14
Capacitance 4 (< 100 µF)
DCI 7
ACI 7
AC + DC I 2
Temperature 6
Frequency 2 (> 10 Hz)
Duty cycle 1 (> 10 Hz)
Pulse width 1 (> 10 Hz)
DECIBEL (dB) CALCUALTION
dB BASE REFERENCE DEFAULT REFERENCE
1 mW (dBm) 1-9999 W 50 W
1 V (dBV) 1 V 1 V
DISPLAY
Both primary and secondary displays are 5 digit on the LCD display.
Both the primary and secondary displays offer a maximum resolution
of 50,000 counts. Automatic polarity indication.
POWER CONSUMPTION
105 mVA / 420 mVA (with backlit) maximum (U1251A)
165 mVA / 480 mVA (with backlit) maximum (U1252A)
OPERATING ENVIRONMENT
Full accuracy at –20
o
C to 55
o
C
Full accuracy to 80% RH for temperature up to 35
o
C, decreasing
linearly to 50% RH at 55
o
C
Altitude:
0 – 2000 meters per IEC 61010-1 2nd Edition CAT III, 1000 V
2000 – 3000 meters per IEC 61010-1 2nd Edition CAT III, 600 V
STORAGE COMPLIANCE
–40
o
C to 70
o
C
SAFETY COMPLIANCE
Certifi ed by CSA for IEC/EN/CSA/UL 61010-1 2nd Edition and
CAN/CSA 22.2 61010-1 2nd Edition.
MEASUREMENT CATEGORY
CAT III 1000 V Overvoltage Protection up to 2000 m, Pollution degree 2
EMC COMPLIANCE
Certifi ed to IEC/EN 61326: 2002, CISPR 11, and equivalents for
Group 1, Class A
COMMON MODE REJECTION RATIO (CMRR)
> 90 dB at DC, 50/60 Hz + 0.1% (1 kW unbalanced)
NORMAL MODE REJECTION RATIO (NMRR)
> 60 dB at DC, 50/60 Hz + 0.1%
Crest Factor
< 3.0
TEMPERATURE COEFFICIENT
0.15 * (specifi ed accuracy)/
o
C (from 20
o
C to 18
o
C or 28
o
C to 55
o
C)
SHOCK and VIBRATION
Tested to IEC/EN 60068-2
DIMENSION (WxDxH)
203.5 mm x 94.4 mm x 59.0 mm
WEIGHT
• 504±5 g with battery (U1251A)
• 527±5 g with battery (U1252A)
CHARGING TIME (only U1252A)
< 220 minutes approx. at the environment of 10
o
C to 30
o
C.
WARRANTY
3 years
GENERAL SPECIFICATIONS
(301 paginas)
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