Keithley 2700 User Manual

6-8 Buffer Model 2700 Multimeter/Switch System User’s Manual
Buffer statistics
Minimum and maximum
This mode displays the minimum and maximum readings stored in the buffer. The buffer
location number and timestamp are also provided for these readings.
Peak-to-peak
This mode displays the peak-to-peak reading (peak-to-peak = Maximum - Minimum).
Average
The average mode displays the mean (average) of all measured readings stored in the
buffer. The following equation is used to calculate mean:
where: y is the average.
X
i
is a stored reading.
n is the number of stored readings.
Standard deviation
This mode displays the standard deviation of buffered readings. The following equation is
used to calculate standard deviation:
where: y is the standard deviation.
X
i
is a stored reading.
n is the number of stored readings.
NOTE If the standard deviation calculation is being performed on a buffer that has
more than 1000 readings, the “CALCULATING” message will flash to indicate
that the Model 2700 is busy. While busy with the calculation, front panel keys
will not operate.
y
X
i
i1=
n
∑
n
---------------=
y
X
i
2
in1–=
n
∑
1
n
---
X
i
i1=
n
∑
⎝⎠
⎜⎟
⎜⎟
⎛⎞
2
⎝⎠
⎜⎟
⎜⎟
⎛⎞
–
n1–
---------------------------------------------------------------=

Keithley 2700 Specifications

General

Type	Digital Multimeter
Measurement Functions	DC Voltage, AC Voltage, DC Current, AC Current, Resistance, Frequency, Temperature
DC Voltage Range	100 mV to 1000 V
AC Voltage Range	100 mV to 750 V
Frequency Range	3 Hz to 500 kHz
Temperature Range	-200°C to +1372°C
Display	Vacuum Fluorescent Display
Connectivity	IEEE-488, RS-232
Channels	10
Power Supply	100V to 240V AC, 45Hz to 66Hz
DC Current Range	10 µA to 3 A
AC Current Range	10 µA to 3 A
Temperature Measurement	Thermocouple, RTD