HP 3457A Service Manual page 17

General Information 3457A
Table 1-1. Specifications
RESISTANCE (Cont'd)
1 YEAR: Teal + 5°C
After one hour warm-up.
RANGE | % READING NUMBER OF COUNTS
(OHMS) 100 PLC* 10 PLC* 1 PLc* = Puc¥ -005 PLC -0005 PLC*
6 1/2 digits|6 1/2 digits|6 1/2 digits|5 1/2 digits]4 1/2 digits|3 1/2 digits
20315 20335 20450 20065 20018 20006
2034 2035 2045 2008 2004 2004
206 207 204 204 204
26 27 24 24 24
9 1 6 6 6
12 16 . 5 5
80 93 14 6 5
1000 1000 100 10 1
1000 1000 1000 100 10 1
Integration Time in Power Line Cycles. When using integration times of 100 PLC, 10 PLC,
or 1PLC; multiply Number of Counts in the Measurement Accuracy Tables by 0.1 for 5 1/2 digit
readings, 0.01 for 4 1/2 digit readings and 0.001 for 3 1/2 digit readings.
Tcal = the temperature of the environment where the 3457A was calibrated. Calibration should
be performed with the environment temperature between 18 and 28 degrees centigrade.
TEMPERATURE COEFFICIENT: *(% of Reading + Number of Counts)/°C
6 1/2 Digits Displayed
RANGE | Auto-Zero ON Auto-Zero OFF*
30 0005 50 -0005 + 510
300 .0005 5.0 +0005 + 60
3 0005 0.5 -0005 + 15
30 0005 0.5 0005 + 15
-0008 + 0.5 0008 + 15
0010 0.5 +0010 + 15
~0025 0.5 -0025 + 15
-3500 0.0 +3500 + 10
3.5000 + 0.0 3.5000 + 10
* Specifications given are for a stable environment (+ 1°C) and over a ten minute period.
For integration times of >= 1 PLC, multiply Number of Counts by 0.1 for 5 1/2 digit
readings, 0.01 for 4 1/2 digit readings and 0.001 for 3 1/2 digit readings.