HoldPeak HP-37B User manual

HP-37B
DIGITAL MULTIMETER
OPERATOR’S MANUAL
1. Overview
The multimeter is characterized at slim size, portable, stable performance and
anti-droppin
g
capacit
y
.Usin
g
31/2di
g
its LCD monitor with character 28mm
hi
g
h, the
y
offer clear readin
g
s. With overall circuitr
y
desi
g
ncenterin
g
on
lar
g
e-scale IC
A
/D converters in con
j
unction and over-load protection circuit,
the meters
g
ive excellent performance and exquisite makin
g
as a hand
y
utilit
y
instrument.
The meters can be used to measure DC &
A
Cvolta
g
e, DC &
A
Ccurrent,
resistance, capacitor, temperature, batter
y
test, Non Contact
A
CVolta
g
e
(
NCV
)
detection, positive diode volta
g
e fall and audible continuit
y
.
2. Panel La
y
out
1Test lead fixture: Fix the test lead.
2CDS sensor: The CDS sensor can reaction to the ambient bri
g
htness
ran
g
e, then automaticall
y
control the LCD backli
g
ht to li
g
hten or
g
oout.
3NCV detection area: Non Contact
A
CVolta
g
e
(
NCV
)
detection area.
4NCV red li
g
ht: Non Contact
A
CVolta
g
e
(
NCV
)
detection red li
g
ht.
5NCV
g
reen li
g
ht: Non Contact
A
CVolta
g
e
(
NCV
)
detection
g
reen li
g
ht.
6LCD displa
y
:31/2di
g
its LCD displa
y
.
7HOLD ke
y
:Pressthe“HOLD”ke
y
to lock displa
y
value, and the “DH”
si
g
n will appear on the displa
y
,pressita
g
ain to exit.
8NCV Ke
y
:Pressthe“NCV”ke
y
, the meter enters Non Contact
A
C
Volta
g
e
(
NCV
)
detection, the NCV
g
reen LED li
g
ht will li
g
ht up, and the
“NCV”si
g
n will appear on the displa
y
,pressita
g
ain to exit.
9Rotar
y
Switch: Use this switch to select functions and ran
g
es.
10 COM: COM and Temperature “
-
” Input Jac
k
11 10A: 10
A
Input Jac
k
12 VΩmA: V/mA/BATT/20uF/ and Temperature “+” Input Jac
k
13 Crust of meter
14 Protective casin
g
3. Safety Information
3-1 The meter is desi
g
ned accordin
g
to IEC-1010 concernin
g
electronic
measurin
g
instruments with an over-volta
g
ecate
g
or
y
600V
(
CA
T
Ⅲ
)
and
pollution 2.
3-2 Follow all safet
y
and operatin
g
instructions to ensure that the meter is used
safel
y
and is kept in
g
ood operatin
g
condition.
3-3 safet
y
s
y
mbols:
Important safet
y
information, refer to the operatin
g
manual.
Dan
g
erous volta
g
ema
y
be presence.
Double insulation (protection Class II)
4. Special Cautions for Operation
4-1 The meters can be safe onl
y
accordin
g
to standard procedures when used
in con
j
unctions with the supplied test leads. To replace dama
g
ed test leads
with onl
y
the same model or same electric specifications.
4-2Toavidris
k
of electric shock, do not use the meters before the cover is in
place.
4-3 The ran
g
eswitchshouldberi
g
ht position for the testin
g
.
4-4 To avoid electric shock and dama
g
in
g
the instruments, the input si
g
nals are
forbidden to exceed the specified limits.
4-5 When measurin
g
TV set or switched power, attention should be paid to the
possible pulses that ma
y
brin
g
destruction to the circuit.
4-6 Ran
g
e switch position is forbidden to be chan
g
ed at random durin
g
measurement.
4-7 Take caution a
g
ainst shock in the course of measurin
g
volta
g
ehi
g
her than
DC 60V &
A
C30V.
4-8 Protection fuse should be replaced onl
y
with same t
y
pe and same
specification.
4-9
A
fter operation is finished, set function switch at OFF ran
g
etosavebatter
y
power.
4-10 If the meter is without usa
g
eforlon
g
time, take out batter
y
to avoid
dama
g
eb
y
batter
y
leaka
g
e.
5. GENERAL SPECIFICATIONS
5-1 Max Volta
g
e between input terminal and Earth Ground: CAT Ⅲ600V
5-2 Over-ran
g
e Indication: displa
y
“1”or“-1”forthesi
g
nificant di
g
it.
5-3
A
utomatic displa
y
of ne
g
ative polarit
y
“-” .
5-4 Low Batter
y
Indication: “ ”displa
y
ed.
5-5 Displa
y
:31/2di
g
it LCD with a max. readin
g
of 1999.
5-6 Manual ran
g
e control
5-7
A
uto Power Off: The meter will switch to standb
y
mode when power on
after approx. 30 minutes. Rotate the rotar
y
switch to OFF position, then
power on to exit standb
y
mode.
5-8
A
uto LCD backli
g
ht
5-9 Fuse protection: 200mA/250V PPTC Resettable Fuse
5-10 Power suppl
y
:9Vbatter
y
(
6F22 or NEDA 1604
)
5-11 Operatin
g
Temp.: 0℃to 40℃
(
relative humidit
y
<85%
)
5-12 Stora
g
e Temp.:-10℃to 50℃
((
relative humidit
y
<85%
)
5-13 Guaranteed precision Temp.: 23±5℃
(
relative humidit
y
<70%
)
5-14 Dimension: 150x106x36mm
5-15 Wei
g
ht: approx. 250
g
(
includin
g
batter
y)
6. Testin
g
Specifications
A
ccurac
y
is specified for a period of
y
ear after calibration and at 18℃to 28℃
(
64℉to 82℉
)
with relative humidit
y
to 70%.
6-1 DC
V
olta
g
e
Ran
g
e Resolution Accurac
y
2V 1mV
±
(
0.5% of rd
g
+2di
g
its
)
20V 10mV
200V 100mV
600V 1V ±
(
0.8% of rd
g
+2di
g
its
)
-- Impedance: 1MΩ
-- Overload protection: 600V DC or
A
Crms
6-2
A
C
V
olta
g
e
Ran
g
e Resolution Accurac
y
200V 100mV ±
(
1.2% of rd
g
+3di
g
its
)
600V 1V
-- Impedance: 1MΩ
-- Overload protection: 600V DC or
A
Crms
-- Frequenc
y
Ran
g
e: 40 to 400Hz
-- Response: avera
g
e, calibrated in rms of sine wave
6-3 DC Current
Ran
g
e Resolution Accurac
y
200mA 100μA±
(
1.2% of rd
g
+2di
g
its
)
10A 10mA ±
(
2.0% of rd
g
+3di
g
its
)
-- Overload protection: 200mA/250V PPTC Resettable Fuse
Note: 10
A
range is not fused, 10
A
up to 10 seconds
6-4
A
C Current
Ran
g
e Resolution Accurac
y
200mA 100μA±
(
1.5% of rd
g
+3di
g
its
)
10A 10mA ±
(
2.5% of rd
g
+5di
g
its
)
-- Overload protection: 200mA/250V PPTC Resettable Fuse
Note: 10
A
range is not fused, 10
A
up to 10 seconds
-- Frequenc
y
Ran
g
e: 40 to 400Hz
-- Response: avera
g
e, calibrated in rms of sine wave
6-5 Resistance
Ran
g
e Resolution Accurac
y
200Ω0.1Ω±
(
1.0% of rd
g
+3di
g
its
)
2kΩ1Ω±
(
1.0% of rd
g
+2di
g
its
)
200kΩ100Ω
2MΩ1kΩ±
(
1.5% of rd
g
+3di
g
its
)
-- Overload protection: 250
V
DC or
A
Crms
6-6 Capacitance
Ran
g
e Accurac
y
Resolution
20µF ±
(
2.5% of rd
g
+5di
g
its
)
10nF
-- Overload protection: 200mA/250V PPTC Resettable Fuse
6-7 Temperature
Ran
g
e Accurac
y
Resolution
℃-20~150℃±
(
3℃+ 1di
g
it
)
1℃
150~1000℃±
(
3% of rd
g
+2di
g
its
)
-- NiCr-NiSi K-t
y
pe sensor
-- Overload protection: 200mA/250V PPTC Resettable Fuse
6-8 Batter
y
test
Ran
g
e
A
ccurac
y
Load current Resolution
±
(
5.0% of rd
g
+5di
g
its
)
A
pprox. 50mA 1mV
A
pprox. 10mA 10mV
-- Overload protection: 200mA/250V PPTC Resettable Fuse
6-9 Diode and
A
udible continuit
y
test
Ran
g
e Description Test Condition
Displa
y
read approximatel
y
forward volta
g
eofdiode
Forward DC current
approx. 1m
A
Reversed DC volta
g
e
approx. 3V
Built-in buzzer sounds if
resistance is less than 50Ω
Open circuit volta
g
e
approx. 3V
Overload protection: 250V DC or
A
Crms
6-10 Non Contact
A
C
V
olta
g
e
(
NCV
)
detection
Test volta
g
eran
g
e: 90V～1000V
A
Crms
TheNCVredLEDli
g
ht and
g
reen LED li
g
ht will li
g
ht up alternatel
y
to
g
ether
with sound.

7. OPERATING INSTRUCTIONS
7-1 Attention before operation
7-1-1 Check battery. When the battery voltage drop below proper operation
range, the “ ” symbol will appear on the LCD display and the battery need to
changed.
7-1-2 Pa
y
attention to the “ ” besides the input
j
ack which shows that the
input volta
g
e or current should be within the specified value.
7-1-3 The ran
g
e switch should be positioned to desired ran
g
e for measurement
before operation.
7-2 Measuring DC
V
oltage
7-2-1 Connect the black test lead to COM
j
ack and the red to VΩmA
j
ack.
7-2-2 Set the rotar
y
switch at the desired “V”ran
g
eposition.
7-2-3 Connect test leads across the source or load under measurement.
7-2-4 You can
g
et readin
g
from LCD. The polarit
y
of the red lead connection
will be indicated alon
g
with the DC volta
g
e value.
NOTE:
1. When the value scale to be measured is unknown beforehand, set the range
selector at the highest position.
2. When onl
y
the figure
“
1” or
“
-1” i
s
displayed, it indicate
s
over-range situation and the
higher range ha
s
to be selected.
3. “ ” means you can’t input the voltage more than 600V, it’s possible to show
higher voltage, but it may destroy the inner circuit or pose a shock.
4. Be cautious a
g
ainst shock when measurin
g
hi
g
hVolta
g
e.
7-3 Measuring
A
C
V
oltage
7-3-1 Connect the black test lead to COM
j
ack and the red to VΩmA
j
ack.
7-3-2 Set the rotar
y
switch at the desired “V”ran
g
eposition.
7-3-3 Connect test leads across the source or load under measurement.
7-3-4 You can
g
et readin
g
from LCD. The polarit
y
of the red lead connection
will be indicated alon
g
with the DC volta
g
e value.
NOTE:
1. When the value scale to be measured is unknown beforehand, set the range
selector at the highest position.
2. When onl
y
the figure
“
1” or
“
-1” i
s
displayed, it indicate
s
over-range situation and the
higher range ha
s
to be selected.
3. “ ” means you can’t input the voltage more than 600V, it’s possible to show
higher voltage, but it may destroy the inner circuit or pose a shock.
4. Be cautious a
g
ainst shock when measurin
g
hi
g
hVolta
g
e.
7-4 Measuring DC Current
7-4-1 Connect the black test lead to COM
j
ack and the red to the
V
ΩmA
j
ack
for a maximum 200mA current , for a maximum 10A current, move the red lead
to the 10A
j
ack.
7-4-2 Set the rotar
y
switch at the desired “A”ran
g
eposition.
7-4-3 Connect test leads in series with the load under measurement.
7-4-4 You can
g
et readin
g
from LCD. The polarit
y
of the red lead connection
will be indicated alon
g
with the DC current value.
NOTE:
1. When the value scale to be measured is unknown beforehand, set the ran
g
e
selector at the hi
g
hest position.
2. When onl
y
the fi
g
ure
“
1” or
“
-1” is displa
y
ed, it indicates over-ran
g
esituation
and the hi
g
her ran
g
e has to be selected.
3. “ ” means the socket mA’s maximum current is 200mA and 10A’s
maximum current is 10A, over 200m
A
current can be protected b
y
the PPTC
resettable fuse, but the 10
A
ran
g
eisnotfused.
4. On the 10
A
ran
g
e, the measurin
g
time should be less than 10 seconds to
prevent precision from affectin
g
b
y
circuit heatin
g
.
7-5 Measuring
A
C Current
7-5-1 Connect the black test lead to COM
j
ack and the red to the
V
ΩmA
j
ack
for a maximum 200mA current , for a maximum 10A current, move the red lead
to the 10A
j
ack.
7-5-2 Set the rotar
y
switch at the desired “A”ran
g
e position.
7-5-3 Connect test leads in series with the load under measurement.
7-5-4 You can
g
et readin
g
from LCD. The polarit
y
of the red lead connection
will be indicated alon
g
with the DC current value.
NOTE:
1. When the value scale to be measured is unknown beforehand, set the ran
g
e
selector at the hi
g
hest position.
2. When onl
y
the fi
g
ure
“
1” or
“
-1” is displa
y
ed, it indicates over-ran
g
esituation
and the hi
g
her ran
g
e has to be selected.
3. “ ” means the socket mA’s maximum current is 200mA and 10A’s
maximum current is 10A, over 200m
A
current can be protected b
y
the PPTC
resettable fuse, but the 10
A
ran
g
eisnotfused.
4. On the 10
A
ran
g
e, the measurin
g
time should be less than 10 seconds to
prevent precision from affectin
g
b
y
circuit heatin
g
.
7-6 Measuring Resistance
7-6-1 Connect the black test lead to COM
j
ack and the red to VΩmA
j
ack.
7-6-2 Set the rotar
y
switch at the desired “Ω”ran
g
eposition.
7-6-3 Connect test leads across the resistance under measurement.
7-6-4 You can
g
et readin
g
from LCD.
NOTE: Max. input overload: 250V rms＜10sec
1. When onl
y
the fi
g
ure “1” or “-1” is displa
y
ed, it indicates over-ran
g
esituation
and the hi
g
her ran
g
e has to be selected.
2. For measurin
g
resistance above 1MΩ, the mete ma
y
take a few seconds to
g
et stable readin
g
.
3. When the input is not connected, i.e. at open circuit, the fi
g
ure “1” or “-1” will
be displa
y
ed for the over-ran
g
e condition.
4. When checkin
g
in-circuit resistance, be sure the circuit under test has all
power removed and that all capacitors have been dischar
g
ed full
y
.
7-7 Measuring Capacitance
7-7-1 Connect the black test lead to COM
j
ack and the red to
V
ΩmA
j
ack.
7-7-2 Set the rotar
y
switch at the desired “20uF”ran
g
eposition.
7-7-3 Connect test leads across the capacitance under measurement.
7-7-4 You can
g
et readin
g
from LCD.
NOTE: Capacitors should be dischar
g
ed before bein
g
tested.
7-8 Measuring Temperature
7-8-1 Connect the black banana plu
g
of the sensor to COM
j
ack and the
red banana plu
g
to the
V
ΩmA
j
ack.
7-8-2 Set the rotary switch at the desired “ ” range position.
7-8-3 Put the sensor probe into the temperature field under measurement.
7-8-4 You can
g
et readin
g
from LCD.
NOTE:
1. The accessor
y
of the meter WRNM-010 t
y
pe contact thermocouple limit
temperature is 250
(
300 shortl
y)
, please use special probe for test
hi
g
her temperature.
2. Please don't chan
g
e the thermocouple at will, otherwise we can't
g
uarantee
to measure accurac
y
.
3. Please don’t importin
g
the volta
g
e in the temperature function.
7-9 Battery Testing
7-9-1 Connect the black test lead to COM
j
ack and the red to
V
ΩmA
j
ack.
7-9-2 Set the rotary switch at the desired “ ”or“ ” range position to
test 1.5
V
or 9V batter
y
.
7-9-3 Connect test leads across the source or load under measurement.
7-9-4 You can
g
et readin
g
from LCD.
7-10 Diode &
A
udible continuity Testing
7-10-1 Connect the black test lead to COM
j
ack and the red to
V
ΩmA
j
ack.
7-10-2 Set the rotary switch at the “ ” range position.
7-10-3 On diode ran
g
e, connect the test leads across the diode under
measurement, displa
y
shows the approx. forward volta
g
e of this diode.
7-10-4 On
A
udible continuit
y
ran
g
e, connect the test leads to two point
of circuit, if the resistance is lower than approx. 50Ω, the buzzer sounds.
NOTE: Make sure the power is cut off and all capacitors need to be dischar
g
ed
under this measurement.
7-11 Non Contact
A
C
V
oltage detection
7-11-1 Power on the meter, on an
y
ran
g
e, press the “NCV”ke
y
,themeter
enters Non Contact
A
CVolta
g
e
(
NCV
)
detection, the NCV
g
reen LED li
g
ht will
li
g
ht up, and the “NCV”si
g
n will appear on the displa
y
.
7-11-2 Hold the Meter so that the mater’s top is verticall
y
and horizontall
y
centered and contactin
g
the conductor, when the live volta
g
e≥90V
A
C
rms, the NCV red LED li
g
ht and
g
reen LED li
g
ht will li
g
ht up alternatel
y
to
g
ether with sound.
NOTE:
1. Even without LED indication, the volta
g
ema
y
still exist. Do not rel
y
on
non-contact volta
g
e detector to determine the presence of volta
g
ewire.
Detection operation ma
y
be sub
j
ect to socket desi
g
n, insulation thickness and
different t
y
pe and other factors.
2. When the meter input terminals presence volta
g
e, due to the influence of
presence volta
g
e, volta
g
esensin
g
indicator ma
y
also be bri
g
ht.
3. Keep the meter awa
y
from electrical noise sources durin
g
the tests, i.e.,
florescent li
g
hts, dimmable li
g
hts, motors, etc.. These sources can tri
gg
er
Non-Contact
A
CVolta
g
e detection function and invalidate the test.
8. Battery replacement
1) When the battery voltage drop below proper operation range the " "
s
y
mbol will appear on the LCD displa
y
and the batter
y
need to chan
g
ed.
2
)
Before chan
g
in
g
the batter
y
, set the selector switch to “OFF”position.
Open the cover of the batter
y
cabinet b
y
a screwdriver.
3
)
Replace the old batter
y
withthesamet
y
pe batter
y
(
9V 6F22 or NEDA
1604
)
.
4
)
Close the cover of the batter
y
cabinet and fasten the screw.
9. Maintenance
9-1 Before attemptin
g
to remove the batter
y
door or open the case, be sure
that test leads have been disconnected from measurement circuit top avoid
electric shock hazard.
9-2 You must replace the test leads if the lead is exposed, and should adopt
the leads with the same specifications as ori
g
in.
9-3 Use onl
y
moist fabric or small amount of deter
g
ent but not chemical
solution for cleanin
g
.
9-4 Do not use the meter before the back cover is properl
y
closed and screw
secured. Upon an
y
abnormalit
y
, stop operation immediatel
y
and send the
meter for maintenance.
9-5 Please take out the batter
y
when not usin
g
for a lon
g
time.
10.
A
ccessories
[1] Test Leads: electric ratin
g
1000V 10A
[2] “K” t
y
pe thermocouple sensor probe
[3] Operator’s Manual