Line Power; Recommended Test Equipment; Verification Limits - Keithley 1801 Instruction Manual

Performance Verification
4.3 Warm-up period
The Model 1801 must be allowed to warm up for at least
two hours before performing the verification procedures.
If the preamplifier has been subjected to temperature
extremes (outside the range stated in paragraph 4.2),
allow additional time for internal temperatures to stabi-
lize. Typically, it takes one additional hour to stabilize a
unit that is 10°C (18°F) outside the specified temperature
range.
The test equipment should also be allowed to warm up for
the minimum period specified by the manufacturer.
4.4

Line power

The Model 1801 should be tested with the Model 2001
operating from a line voltage in the range of 90-134V or
180-250V at a frequency of 50, 60, or 400Hz.
4.5

Recommended test equipment

Table 4-1 lists all test equipment required for verification.
Alternate equipment may be used as long as that equip-
Table 4-1
Recommended test equipment for performance verification
Manufacturer
Fluke
Keithley
Keithley
* 90-day calibrator specifications shown include total uncertainty at specified output. Low-thermal divider specifications
are for one year.
4-2
Model Description
5700A Calibrator
262 Low-thermal voltage divider
1507 Low-thermal input cable
ment has specifications at least as good as those listed in
the table.
4.6 Verification limits
The verification limits stated in this section have been
calculated using only Model 1801 one year specifications,
and they do not include test equipment tolerance. If a
particular measurement falls slightly outside the allowed
range, recalculate new limits based both on Model 1801
specifications and pertinent calibration equipment
specifications. For DC volts verification, additional
uncertainty includes both calibrator and low-thermal
divider uncertainty.
Model 1801 verification procedures
assume that the Model 2001 Multimeter
is properly calibrated and meets its
stated specifications. See the Model
2001 Calibration Manual for perfor-
mance verification procedures and cali-
bration information.
Specifications*
DCV: 0.19V, ±11ppm
ACV: 450µV, 100Hz:±1.03%
2
10 to 1 : ±35ppm
3
10 to 1 : ±35ppm
4
10 to 1 : ±100ppm
NOTE