Hioki DSM-8104, Instruction Manual

Page: 127 / 132

117
(1) Set the meter as follows.
● Integral time (SAMPL) 300ms
● Trigger mode (TRIG) Internal (INT)
● Averaging (AVE) ON
● Self-calibration (CALIBRATION) Auto execute (AUTO MODE: ON)
(INTERVAL) 60s
● Measuring voltage (MES. V) 10V
● Measuring mode (MODE) Current measurement
(2) Connect reference resistance of 100k Ω between the “INPUT” and “OUTPUT”
terminals.
(3) Connect a voltmeter between the “OUTPUT” terminal and “GUARD” terminal.
(4) Set the measuring voltage to 10V.
(5) Set the measuring mode to the Current Measuring mode.
(6) Set the current measuring range to the 100
μ A range (“HOLD 1”).
(7) Measure and calibrate the 100 μ A range.
(8) Change the reference resistance to 1M Ω , set the current measuring range to the
10 μ A range (“HOLD 2”) and similarly calibrate the 10 μ A range.
(9) Calibrate each range by the same method by changing the reference resistance
and range. Calibrate the maximum sensitivity, 10pA range, at reference
resistance of 100G
Ω and measuring voltage of 1V.
The relationship between the reference resistance and current measuring range is shown
below.
Measuring
Voltage
Reference
Resistance
Current Range
１０Ｖ １００ｋΩ １００μＡ（「
HOLD1
」）
１０Ｖ １ＭΩ １０μＡ（「 HOLD2 」）
１０Ｖ １０ＭΩ １μＡ（「
HOLD3
」）
１０Ｖ １００ＭΩ １００ｎＡ（「 HOLD4 」）
１０Ｖ １ＧΩ １０ｎＡ（「
HOLD5
」）
１０Ｖ １０ＧΩ １ｎＡ（「 HOLD6 」）
１０Ｖ １００ＧΩ １００ｐＡ（「
HOLD7
」）
１Ｖ １００ＧΩ １０ｐＡ（「 HOLD8 」）
[Caution] Note that the full-scale value of the current measuring range varies depending on
the integral time. (See 5.1.5 “Setting measuring range”)
10.3 Self-calibration
Function
This meter has a self-calibration function and can continue self-calibration at a preset
interval by setting an interval. By setting this function ON, an accuracy can be maintained
for a long time.
During a preshipment factory inspection, this meter is set to self-calibration function ON and
60s as a self-calibration interval.
Self-calibration is performed by measuring an offset current and gain of the current
measuring unit and measured results are corrected by providing reference voltage and
reference resistance inside.
Self-calibration requires about 2s to complete and this time sometimes presents a problem
in automatic measurement. If such problem occurs, set the self-calibration function OFF