Brother HD-390I Operator's Instruction Manual page 3

Test
Functions
DC V 0-0.1-2.5-10-50-
250-1000V
Null DCV ± -5V， ± 25V
AC Vrms 0-10-50-250V
-1000V
AC Vp-p 0-28(10)-70x2(5
0)-700(250)
-2800V(1000)
Note: at AC50V
range， the Vp-p
real reading must
be doubled.
DC mA 0-0.05-2.5-25
-250 mA，10A
Ω X 1: 0.2 ~ 2KΩ
Midscale at 20Ω
X 10: 2 ~ 20KΩ
Midscale at200Ω
X 100: 20 ~
200KΩ Midscale
at 2000Ω
X1K: 200~ 2MΩ
Range Accuracy
 3% FSD.
 4% FSD.
For 1000V
 5% FSD.
 4% FSD.
 5% FSD.
For 1000V
 5% FSD.
 3% FSD.
 4% FSD.
at 10A
range
 4% of
ARC of
Scale
Length
1
Remarks
Input Impendence:
20KΩ/V Overload
Protection: Max.
1000V AC/DC
BUT 0.1V/2.5V/10V
250V Max.
Input Impedance: 40KΩ/V
Overload 1000V Max.
Input Impendence:
9KΩ/V Overload
Protection: Max.
1000V AC/DC
But 10V/50V only
250V Max. Band
width: 20 ~10K Hz
Input Impendence:
9KΩ/V Overload
Protection: Max.
2800V peak-to-peak
But 10V/50V only
700Vp-p Max. Band
width: 20 ~10K Hz
Drop Voltage: 250 mV
Overload protected by
Fuses 0.5A/250V &
10A / 250V at 10A
range， and Oxide
Varactor.<250V AC/
DC(5s). Max. test time
1min. for 10A.
Overload protected by
the Oxide Varactor &
Fuse <250V AC/DC
(5s).