Amprobe AMB-25 Operating Manual
INSULATION TESTER
AMB-25
INSTRUCTION MANUAL
sACm:
MEM
READ
HOLD
K
M
VG
1. SAFETY INFORMATION
The circuit under test must be de-energized and isolated before
connections are made except for voltage measurement.
Verify operation prior to measuring hazardous voltages (voltage
above 30V AC rms, 42V AC peak and 60V DC).
Do not touch the Circuit connections during a test.
Disconnect the live test lead before disconnecting the neutral
test lead.
After insulation tests, to protect electric shock, capacitive circuits
must to be discharged.
Do not use the meter if the low battery indicator (
showed.
Test leads (including crocodile clips) must be in good order,
clean and no broken or cracked.
Do not use the meter if it looks damaged.
Do not use the meter around explosive gas, vapor or dust.
Do not push test button before all connection and preparation is
done. The instrument must only be used by suitably trained and
competent persons.
Do not use the meter with any parts or cover removed.
Do not use the meter in a wet environment.
U.S. PAT. NO. 478,017
JAPAN PAT. NO. 1180870
CHINA PAT. NO. ZL02367250.1
Warnings and Safety symbols:
Caution refer to this manual before using the meter.
Dangerous voltages.
Meter is protected throughout by double insulation or
reinforced insulation.
Comply with IEC1010-1
When servicing, use only specified replacement parts.
1
BT
) is
2. SPECIFICATIONS
Ω
2-1 General Information
Environment conditions :
c Installation CategoriesⅢ 1000V
d
Pollution Degree 2
e Altitude up to 2000 meters
f Indoor use only
Safety Meets of IEC61010-1 and IEC61557
Display : Dual display, 3-3/4 Digital readout with analog bar
Sampling Rate : 2.5 sample/sec.
Manual data Memory and Read : Memory capacity 9 set.
Over Range Indicator : “
Low Battery Indication :
Operating Temperature and Humidity：
Temperature Coefficient : 0.10 x (specified accuracy)/ ℃
Storage Temperature and Humidity :
Battery : 6 x 1.5V Size “AA” battery.
Fuse : 6mm x 32mm (0.25 x 1.25 inch), 0.5A 1000V, Fast Acting.
Dimensions : 235 (L) x 116 (W) x 54(H) mm ,
Weight : Approx. 520g (1.15 LB), include battery
Accessories : Test leads, 6pcs battery, Holster, operation manual.
indication.
” will be displayed.
BT
The (
below the operating voltage.
0℃ to 50℃ (32℉ to 122℉) below 80% RH (noncondensing).
-10℃ to 60℃ (14℉ to 140℉) below 70% RH (noncondensing)
) will be displayed when the battery voltage drop
(9.3”L x 4.6”W x 2.1”H)
2
2-2 Electrical Specifications
Accuracies are specified as:
±(...% of reading + ...digits) at 23℃ ±5℃,below 80% RH.
Insulation Resistance
Range Resolution Accuracy Test Voltages
40MΩ/400MΩ
400MΩ/1000M
/500V
400MΩ/ 2000M
/1000V
Analog Bar Graph
Nominal Current
Resistance & Continuity (<40Ω)
Range Resolution Accuracy
Ω
999.9
0.1Ω
40MΩ: 10 K
Ω
400MΩ:100 K
4000MΩ: 10M
Ω
3%+5
Ω
(<1000M)
Ω
5%+5
(>1000M)
0 to 4000MΩ
Max. open Circuit
1%+2 3V 1000Vrms
3
250V+20% ~ -0%
500V+20% ~ -0%
1000V+20% ~ -0%
≧
1mA
Voltage
Overload
Protection
3. PARTS & CONTROLS
MEM
READ
COM V
4
c
LCD display.
d
MEM key : Manual data memory control key.
e
LOCK key : Locks the test Insulation Resistance (MΩ).
a). Press and hold down TEST key, then press LOCK key, the
“ LOCK ” icon appears on the display.
b). In MΩ mode continuously applies the test voltage to the circuit to
be tested. The beeper sounds every 2 seconds to remind you
that you are in the LOCK mode.
c). Press Lock or TEST key again to exit the mode.
f
READ key: Manual memory data reading control key.
g
key: In Ω function, turns the test lead resistance
compensation ON.
VM
M
V
h
TEST key :
the
display indicates 0.0Ω.
icon appears on the display and the main
Touch the probe tips together, then press
key,
a). Used for MΩ test functions.
b). Press and hold TEST key until the main display reading is stable.
▼▲
i j
keys : In READ mode, select the memory data location for
direct reading the data from the display.
k
Rotary switch : To select a measurement function.
l
Input terminals.
5
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