166 Agilent U1251A/U1252A User’s and Service Guide
8 Specifications
General Specifications
Display
• Both primary and secondary displays are 5-digit liquid crystal display (LCD)
with maximum reading 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 °C to 55 °C
• Full accuracy to 80 % RH for temperature up to 35 °C, decreasing linearly to 50 % RH at 55 °C
Altitude:
• 0 - 2000 meters per IEC 61010-1 2
nd
Edition CAT III, 1000 V/CAT IV, 600 V
Storage Compliance
• – 40 °C to 70 °C
Safety Compliance
• EN/IEC 61010-1:2001, ANSI/UL 61010-1:2004, and CAN/CSA-C22.2 No.61010-1-04
Measurement Category
• CAT III 1000 V/ CAT IV 600 V
EMC Compliance
• Certified to IEC61326-1:2005 / EN61326-1:2006
• CISPR 11:2003 / EN 55011:2007 Group 1 Class A
• Canada: ICES-001:2004
• Australia/New Zealand: AS/NZS CISPR11:2004
Common Mode Rejection Ratio (CMRR)
• > 90 dB at DC, 50/60 Hz + 0.1 % (1 kΩ unbalanced)
Normal Mode Rejection Ratio (NMRR)
• > 60 dB at DC, 50/60 Hz + 0.1 %
Temperature Coefficient
• 0.15 * (specified accuracy)/ °C (from -20 °C to 18 °C or 28 °C to 55 °C)
Shock and Vibration
• Tested to IEC/EN 60068-2
Dimension (HxWxD)
• 203.5 mm x 94.4 mm x 59.0 mm
Weight
• 504±5 grams with battery (U1251A)
• 527±5 grams with battery (U1252A)
Charging Time (only U1252)
• < 220 minutes approx. at the environment of 10 °C to 30 °C.
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