Instek Digital LCR-821 - Instrument Physical and Error Specifications; Error Value Formulas for Specific Models; Primary Readout Accuracy Formulas

LCR-800 Series User Manual
38
LCD monitor:
240×128 dot matrix C.C.F.L. back light LCD with adjustable contrast.
Battery:
DC source for system memory and calibration data backup, a replaceable 3V
lithium battery (BR-2/3A type), which probably needs to be replaced after using
for 3 years.
Every time when the battery is replaced, the LCR Meters should be re-
calibrated.
Operation Environment:
Indoor use,
Altitude up to 2000M
Installation Category II
Pollution Degree 2
Operating temperature: 10℃～50℃, < 85% relative humidity
Storage temperature:－20℃～60℃
AC Power Source:
AC 100～240V, 50Hz～60Hz
Power Consumption:
45 Watts maximum
Fuse Replacement:
Slow-Blow, 3A, 250V
Dimensions:
330mm (W) × 149mm (H) × 437mm (D)
Weight:
5.5 kg
LCR-800 Series User Manual
39
The Error value of LCR-817/819/821 (Double the error value for LCR-
827/829/816/826)
z The formula for primary readout accuracy of C, R, L, and Z.
C: 2 counts±0.03%+0.02%[(1+Ka)
#
or (X/Ymax )
#
or (Ymin/X)
#
] (1+│D│)(1+Kb+Kc)
R: 2 counts±0.03%+0.02%[(1+Ka)
#
or (X/Ymax )
#
or (Ymin/X)
#
] (1+│Q│)(1+Kb+Kc)
L: 2 counts±0.03%+0.02%[(1+Ka)
#
or(X/Ymax)
#
or(Ymin/X)
#
] (1+ 1 /│Q│)(1+Kb+Kc)
|Z|: Ze = Treat R, L or C as the object under test conforming above formula:
example:
When the object under test is C, select:
Ze = 2 counts±0.03%+0.02%[(1+Ka)
#
or(X/Ymax)
#
or(Ymin/X)
#
] (1+│D│)(1+Kb+Kc)
When the object under test is R, select:
Ze = 2 counts±0.03%+0.02%[(1+Ka)
#
or(X/Ymax)
#
or(Ymin/X)
#
] (1+│Q│)(1+Kb+Kc)
When the object under test is L , select:
Ze=2 counts±0.03%+0.02%[(1+Ka)
#
or(X/Ymax)
#
or(Ymin/X)
#
](1+ 1 /│Q│)(1+Kb+Kc)
z The formulas of secondary readout accuracy for D, Q, and θ.
Error
D with C
2count±0.0003 + 0.0002[(1+Ka)
#
or (X/Ymax)
#
or (Ymin/X)
#
] (1+│D│+D²)(1+Kb+Kc)
Q with R
2count±0.0003 + 0.0002[(1+Ka)
#
or (X/Ymax)
#
or (Ymin/X)
#
] (1+│Q│+Q²)(1+Kb+Kc)
Q with L
2count±0.0003 + 0.0002[(1+Ka)
#
or (X/Ymax)
#
or (Ymin/X)
#
] (1+│Q│+Q²)(1+Kb+Kc)
θ with Z θe=(180/π) x (Ze/100)
# 1. if X ≧ Ymax, please select (X/Ymax)
2. if X
≦ Ymin, please select (Ymin/X)
3. if Ymin<X<Ymax, please select (1+Ka)
4. Ze is impedance error
5.
θe is θ error