User's Manual
287/289 Calibration Manual Supplement
1/13 1
Change #1, 55189, 55213, 55269
On page 7, under Resistance Specifications, change the Accuracy for 500 kΩ:
From:
0.05 % + 2
To: 0.05 % + 15
On page 8, under Frequency Counter Specifications, add a footnote 3 to the Duty Cycle row.
[3] For 10 μs < pulse width <25 μs add 1%. For 2 μs < pulse width ≤10 Ωs add 3.5 %.
Under Pulse Width, change the Accuracy for 0.1000 ms:
From:
0.002 ms + 3 counts
To: 0.002 ms + 30 counts
On page 9, in the Input Characteristics table, under Typical Short Circuit Current, change
5 MΩ:
From:
0.3 μA
To: 1 μA
On page 18, Table 4, replace steps 22 and 29 with:
22. AC mV 500.00 mV 250 mV 65 kHz 240.85 259.15
29.
VAC, HZ %
(Duty Cycle)
5.0000 V
5 V p-p, Sq.
wave @ 15 %
50 kHz 1.40 28.60
Change #2, 54932, 55354, 64414
On page 1, following the bullets, replace the sentence with:
For complete operating instructions, refer to the Model 287 & 289 Users Manual.
On page 2 & 3, delete the Safety Information section.
On page 3 add the following to the list of Warnings:
• Measure a known voltage first to make sure that the Meter operates correctly. If
you are unsure, have the Meter examined.
On page 4, under the Cautions replace the fourth bullet with:
• Before measuring current, check the Meter’s fuses. (See “Testing the Fuses” in
the Users Manual).
On page 5, under General Specifications delete the Vibration, Shock, Safety Standards,
Electromagnetic Compatibility Standards (EMC), and the Certifications sections and replace
with:
Safety ..................................................... IEC 61010-1: 600 V CAT IV / 1000 V CAT III, Pollution Degree 2
Electromagnetic Environment............. IEC 61326-1: Portable
Electromagnetic Compatibility ............ Applies to use in Korea only Class A Equipment (Industrial Broadcasting &
Communication Equipment) [1]
[1] This product meets requirements for industrial (Class A) electromagnetic wave
equipment and the seller or user should take notice of it. This equipment is intended
for use in business environments and is not to be used in homes
.