Amprobe HD110C User manual

HD110C
Heavy-Duty Digital Multimeter
User Manual
English
99 Washington Street
Melrose, MA 02176
Phone [phone]
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com

HD110C Features
HD110C
HD110C
V
A
COM
2A MAX
FUSED
MAX
1500V
1000V
OFF
20
M
2
M
200
k
20
k
2
k
200
IV
CAT
1000 V
200
mA
2 A
20
mA
2
mA
1500
1000
200
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20
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2
V
V
200
mV
200
A
22
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1
2
3
5
4
6
7
8
9
Number Description
1 COM Input - common or low input for all measurements
2 Amp Input
3 Function/Range Selector Switch
4 Low Battery Indicator
5 Hold Indicator
6 3 ½ Digit LCD with unit indicators
7 AC/DC Button
8 Hold Button
9 High input - voltage and resistance

1
HD110C Heavy-Duty Digital Multimeter
Contents
Symbols........................................................................................................................................................2
Introduction.................................................................................................................................................2
Warnings and Precautions.......................................................................................................................... 2
Instrument Familiarization ......................................................................................................................... 3
Overload Indication ....................................................................................................................................3
Measuring Procedures ................................................................................................................................3
DC & AC Voltage Measurement (See Figure 1) ......................................................................................... 4
DC and AC Current Measurement (See Figure 2)...................................................................................... 4
Resistance Measurement (See Figure 3) ....................................................................................................4
Diode and Continuity Test (See Figure 4) ..................................................................................................4
AC/DC Button ..............................................................................................................................................5
Hold Button.................................................................................................................................................5
Auto-Power Down ......................................................................................................................................5
Incorrect Input Warning .............................................................................................................................5
Safety Test Leads .........................................................................................................................................5
Optional Accessories ................................................................................................................................... 5
Specifications............................................................................................................................................... 6
Maintenance & Repair ................................................................................................................................8
Battery / Fuse Replacement (See Figure 5) ................................................................................................8
Repair........................................................................................................................................................... 9

Symbols
BBattery Refer to the manual
Double insulated Dangerous Voltage
Direct Current Earth Ground
Alternating Current Audible tone
Fuse Complies with EU directives
Conforms to relevant
Australian standards. ®Canadian Standards Association. [Note: Canadian and US.]
Do not dispose of this product as unsorted municipal waste. Contact Amprobeor a
qualified recycler for disposal.
Introduction
The HD110C Heavy-Duty Digital Multimeter is a 3-1/2 digit, manual ranging, ac-coupled average
measuring rms reading display instrument that measures: voltage, current, resistance, continuity, and
diode junctions. Menu selection allows Data Hold and ac or dc voltage and current selection.
Warnings and Precautions
This instrument is EN61010-1 certified for Cat IV, 1000 V ac/1500 V dc and lower installations.
Based on EN61010-1 transient requirements, this product should only be used in installations
where transients do not exceed 12,000 volts (a 1.2 µS/50 µS pulse).
• All inputs are protected against continuous overload conditions up to the limits of
each function's stated input protection (see specifications). Never exceed these limits or the
ratings marked on the instrument itself.
• Exercise extreme caution when: measuring voltag e >20 V, current >10 mA, ac power
line with inductive loads, ac power line during electrical storms. High voltages can be lethal
and high voltage transients may occur at any time.
• Operator injury or damage to the multimeter may occur during current measurements
if the fuse blows in a circuit with open circuit voltage exceeding 1000 V ac/1500 V dc.
• Always inspect your DMM, test leads and accessories for signs of damage or
abnormality before use. If an abnormal condition exists (broken or damaged test leads,
cracked case, display not reading, etc.), do not use. The internal fuse cover is integral to the
EN61010-1 Cat IV safety rating and must be in place to avoid potential shock hazards
• When testing for voltage or current, make sure these ranges function correctly. Take a
reading of a known voltage or current first.
• Never ground yourself when taking measurements. Do not touch exposed metal pipes,
outlets, fixtures, etc., which might be at ground potential. Keep your body isolated from
ground and never touch exposed wiring, connections, test probe tips, or any live circuit
conductors. Do not use the Flex-Strap to attach the meter to your body.
• Always measure current in series with the load – NEVER connect the multimeter
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3
ACROSS a voltage source. Check fuse first.
• Never replace a fuse with one of a different rating.
• Do not operate instrument in an explosive atmosphere (flammable gases, fumes,
vapor, dust.)
• Do not use this or any piece of test equipment without proper training
• CRT SERVICE SAFETY REMINDER: A potential danger exists when measuring voltages in
the horizontal output and damper stages of CRT equipment. (High voltage transients greater
than 8000 V). Refer to your CRT service manual for proper servicing instructions.
Instrument Familiarization
Your shipping carton should include the multimeter, a holster with Magne-Grip hanging strap, one test
lead set (one black, one red) threaded alligator clips, one 9 V battery (installed), one 2 mm hex wrench
(inside holster) and this manual. If any of the items are damaged or missing, immediately return the
complete package to the place of purchase for an exchange.
Protective Holster
The holster/tilt stand protects the meter form accidental falls and provides greater ease of use. Both test
lead probes can be attached to the holster for storage. One probe can be attached for measurement,
holding the meter with probe in one hand and the second probe in the other hand.
Overload Indication
Overload Indication: (input exceeds meter’s highest range) and Display Overload (input
exceeds selected range) are both signaled by a 1 displayed on the left side of the LCD.
In the volts or amperage ranges Display Overload can be corrected by selecting a
higher range to display the input reading. If the highest range is selected and the overload indication
continues, this is now an Input Overload. Remove the test leads from the circuit immediately as input
exceeds the meter’s rated capability.
Note: In both instances, the overload indication is normal in the OHMS and Continuity/Diode ranges to
indicate an open circuit. Function Error is signaled a by continuous tone when a test lead is placed in
either the 2 A jack and the selector switch is not in the correct current range. If the meter is connected
to a voltage source with test leads set for current, very high current could result. All current ranges are
protected with fast acting fuses.
Battery Low: When the battery low indicator is displayed the battery has less than 50 hours operation
and the accuracy of the meter can no longer be guaranteed.
Measuring Procedures
Turn the meter on by turning the function/range switch away from OFF and selecting the parameter
you want to measure. If the parameter selected has more than one range position, the display will
indicate the range by a changing position of the decimal point. Always select the highest range if the
maximum potential reading is not known. Then turn the selector switch down in range to obtain the
best resolution reading.
1. When connecting or disconnecting test leads to a circuit, always turn off power to device or
circuit being tested and discharge all capacitors.
2. Strictly observe the max input limits.
3. Do not change functions while test leads are connected to circuit.

4
DC & AC Voltage Measurement (See Figure 1)
1. Connect test leads to the meter as shown in Figure 1.
2. Turn function selector switch to V and the desired range.
3. Press the AC/DC menu button to display either ac or dc indicator.
4. Touch Probe tips across voltage source (in parallel with circuit).
5. Voltage value will appear on Digital Display along with the voltage polarity (for dc).
DC and AC Current Measurement (See Figure 2)
1. Connect red test lead to the A input for current measurements up to 2 A. Connect black test
lead to COM input connector.
2. Set the Function Switch to the desired current range.
3. Press the AC/DC menu button to display either AC or DC indicator.
4. Open circuit in which current is to be measured (voltage between this point and ground must
not exceed 1000 V ac/1500 V dc). Securely connect test leads in series with the load.
5. Turn on power to circuit being tested.
6. Read current value on Digital Display.
Incorrect Input Warning: A tone will sound when a test lead is connected to the amperage jack, but the
selector switch is not set to the correct current range. Ranges 200 µA to 2 A require the test lead to be in
the A jack.
Resistance Measurement (See Figure 3)
1. Turn off any power to the resistance to be measured and discharge any capacitors. Any
voltage present during a resistance measurement will cause inaccurate readings.
2. Connect test leads to the meter as shown in Figure 3.
3. Set Function/Range Switch to the desired resistance range.
4. Connect test leads to circuit being measured.
5. Read resistance value on digital display. Open circuits will be displayed as “1”.
Diode and Continuity Test (See Figure 4)
The diode test measures the voltage drop across a diode junction.
1. Connect the test leads as shown in Figure 4.
2. Set the Function/range switch to .
3. Apply probe tip of red lead to the anode and the black lead to the cathode of the diode.
4. The meter’s display indicates the forward voltage drop (approx. 0.6 V for silicon diode or
0.4 V for germanium diode). An open diode is indicated by “1”.
5. Reverse test lead connections to the diode to perform a reverse bias test. “1” indicates a
good diode.
Notes: “1” for both reverse and forward bias tests indicates an open diode. A low voltage reading for
both bias tests indicates a shorted diode. If the diode is shunted by a resistor of 1000 Ωor less, it must be
removed from the circuit before taking the measurement. Bipolar transistor junctions may be tested in
the same manner described above as emitter-base and base-collector junctions are diode junctions.
When measuring continuity (also for shorted diodes) the meter emits a continuous tone when the
resistance value falls below 50 .

AC/DC Button
The AC/DC button works in conjunction with the Selector Switch to alternate the type of
input desired for the Volts and Amperes ranges. Each press of the button will alternate
the input type again and an ac or dc indication will be appear on the display.
Hold Button
Data Hold freezes the reading present on the LCD at the moment the button is pressed.
To use this menu feature set up the meter for the type of measurement and range
desired. Connect the test leads to the circuit/component to be measured, then press Hold.
The LCD reading will freeze and display “HOLD.” You may now remove the test leads and
the reading will not change until you press Hold again.
Auto-Power Down
In order to save battery life, your multimeter powers down automatically after approximately 30
minutes of inactivity. You can turn it back on by turning the function selector switch to OFF and back to
a measuring function.
Incorrect Input Warning
The meter sounds a steady audio tone and displays when a test lead is placed in the 2 A input jack
and the Selector switch is not set to a correct current position. If the multimeter is connected to a
voltage source with leads set for current, very high current could result. All current ranges are protected
with fast acting fuses.
Safety Test Leads
The test leads included with your meter have shrouded banana plugs to eliminate the possibility of
shock if the plugs accidentally pull out of the meter while making a measurement. Replacement part
number for safety test leads is TL1500.
Optional Accessories
CT235A 1000 A ac/dc Clamp FP700 2 A/1500 V Fuse
CT237A 200 A ac/dc Current Clamp HV231-
10A High Voltage Probe
CT238A 20 A ac/dc Current Clamp TC253B Temperature Converter
(900 °C/1652 °F)
DC205C Deluxe Hard-Shell Carring Case TL1500
Standard Replacement Test Leads
with threaded alligator clips,
CAT IV
DC207C
Large Deluxe Hard-Shell Carry
Case with extra space for
accessories
VC221B Padded Vinyl Carrying Case
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FAX [phone] - TestEquipmentDepot.com

6
Specifications
General Specifications
Display: 3-1/2 digit LCD, 1999 counts, with
annunciators and menu features
Polarity Indication: Automatic
Input overload indication: 1
Low Battery Indication: B< 50 hours battery life
remain, accuracy is no longer guaranteed
Display Update Rate: 2.5/sec, nominal
Oper. Temp. (< 75 % R.H.): 0 °C to +50 °C
Storage Temp: -20 °C to 60 °C, 0 to 80 % RH,
battery removed
Temperature coefficient: 0.1 x spec. accuracy /°C
(0–18 °C and 28–50 °C) all functions and ranges
except for mVDC
Temperature coefficient: 0.3 x spec. accuracy /°C
(0–18 °C and 28–50 °C) for mVDC
Environment: Indoor use only.
Altitude: Up to 2000 m
Power: Standard 9 V battery, NEDA 1604, JIS
006P,IEC 6F22
Auto Power-Down: Meter powers down after
approx. 30 min. of inactivity.
Battery Life: 250 hours typical with carbon-zinc,
500 hours typical with alkaline
Dimensions, with holster (H x W x D): 200 x 102 x
59 mm (7.9 in x 4.0 in x 2.3 in)
Weight (incl. battery): 642 g (1.4 lb)
Accessories: Test leads, battery (in instrument),
hex wrench in holster, Magne-Grip flex strap and
Users Manual
Case material: Flame retardant, high-impact
thermoplastic
Safety: meets EN 61010-1 Cat IV - 1500 V dc and
1000 V ac rms, Class II EN60529:IP67
EMC: Meets EN 61326-1
This product complies with requirements of
the following European Community Directives:
89/336/EEC (Electromagnetic Compatibility) and
73/23/EEC (Low Voltage) as amended by 93/68/EEC
(CE Marking).
However, electrical noise or intense
electromagnetic fields in the vicinity of the
equipment may disturb the measurement circuit.
Measuring instruments will also respond to
unwanted signals that may be present within
the measurement circuit. Users should exercise
care and take appropriate precautions to avoid
misleading results when making measurements in
the presence of electronic interference.
Electrical Specifications
Accuracies at 23 °C ± 5 °C, <75 % RH non-
condensing, guaranteed for one year.
DC Volts
Ranges: 200 mV, 2 V, 20 V, 200 V, 1500 V
Resolution: 0.1 mV
Accuracy: All ranges ±(0.1 % rdg+2 dgts)
Input Impedance: 10 MΩ
OL Protection: 1500 V dc/1000 V ac rms
Transient Protection: 12 kV impulse (1.2 µS/50 µS)
based on EN 61010-1:2001 impulse requirement
for at CAT IV 1000 V product. This product should
not be used in installations where transients
exceed 12 kV.
AC Volts (45 Hz to 2 kHz)
Ranges: 200 mV, 2 V, 20 V, 200 V, 1000 V
Resolution: 0.1 mV
Accuracy:
200 mV to 200 V (45-500 Hz): ±(0.8 % rdg+4 dgts)
1000 V (50-60 Hz): ±(0.8 % rdg+4 dgts),
200 mV to 200 V (500 Hz-2 kHz): ±(1. 5% rdg+5
dgts),
1000 V (60-500 Hz): ±(1.5 % rdg+5 dgts)
Input Impedance: 10 MΩ

7
OL Protection: 1500 V dc/1000 V ac rms
Transient Protection: 12 kV impulse (1.2 µS/50 µS)
based on EN 61010-1:2001 impulse requirement
for at CAT IV 1000 V product. This product should
not be used in installations where transients
exceed 12 kV.
DC Current
Ranges: 200 µA, 2 mA, 20 mA, 200 mA, 2 A
Resolution: 0.1 µA
Accuracy: 200 µA to 20 mA: ±(0.5 % rdg+2 dgts),
200 mA to 2 A: ±(1.0 % rdg+2 dgts)
Voltage Burden: 250 mV max.
(1 mV/1 µA on 200 µA Range),
(100 mV/1 mA on 2 mA Range),
(10 mV/1 mA on 20 mA Range),
(1.5 mV/1 mA on 200 mA Range),
(500 mV/1 A on 2 A Range)
OL Protection: A Input (F 2 A/1500 V,
size 8 x 65 mm IR fast blow ceramic)
AC Current (45 Hz to 1 kHz)
Ranges: 200 µA, 2 mA, 20 mA, 200 mA, 2 A
Resolution: 0.1 µA
Accuracy: 200 µA to 20 mA: ±(0.8 % rdg+4 dgts),
200 mA to 2 A: ±(1.2 % rdg+4 dgts)
Voltage Burden: 250 mV max. (1 V on 2 A range)
OL Protection: Same as DC Current.
Resistance
Ranges: 200 Ω, 2 kΩ, 20 kΩ, 200 kΩ, 2 MΩ, 20 MΩ
Resolution: 0.1 Ω
Accuracy: 200 Ω±(0.5 % rdg+4 dgts),
2 kΩto 200 kΩ: ±(0.3 %rdg+2 dgts),
2 MΩ: ±(1.0 % rdg+4 dgts),
20 MΩ: ±(2.0 %rdg+4 dgts)
OL Protection: 1500 V dc/1000 V ac rms
Open Circuit Voltage, 200 Ωrng: 3.0 V dc typical;
all other rngs 0.3 V dc typical.
Diode/Continuity Test
Test Current: 1m A dc typical
Test/Open Circuit Voltage: 3.0 V dc Typical
Diode Accuracy: ±(1.5 % rdg +2 dgts)
Continuity Audible Threshold: < 50 Ω± 25 Ω
Response Time: <100 msec
OL Protection: 1500 V dc/1000 V ac rms

8
Maintenance & Repair
If there appears to be a malfunction during the operation of the meter, the following steps should be
performed in order to isolate the cause of the problem:
1. Check the battery.
2. Review the operating instructions for possible mistakes in operating procedure.
3. Inspect and test the test probes for a broken or intermittent connection.
4. Inspect and test the fuse. See Fuse Replacement.
Except for the replacement of the battery or fuse, repair of the multimeter should be performed only by
a Factory Authorized Service Center or by other qualified instrument service personnel. The front panel
and case can be cleaned with a mild solution of detergent and water. Apply sparingly with a soft cloth
and allow to dry completely before using. Do not use aromatic hydrocarbons or chlorinated solvents for
cleaning.
Battery / Fuse Replacement (See Figure 5)
 Warning
To prevent electrical shock or meter damage, disconnect the meter’s test leads from any circuit and the
meter then turn the meter off before removing the rear case cover.
Precautions
• The hex head case screws each have a washer and gasket integral to the meter’s water/dust-
proof integrity. Upon opening, be sure these are retained and replaced when closing.
• Prying the rear case cover off with a knife or screwdriver is not recommend as this may
damage the case rim flanging and/or gasket and destroy the water/dust-proof integrity.
• The fuse cover is integral to the EN61010-1 Cat IV safety rating and must be replaced to avoid
potential shock hazards.
• Battery or fuse replacement should be performed in a clean environment and with
appropriate care taken to avoid contaminating the meter’s interior components.
• There are no user serviceable parts or components on the circuit boards. Disassembly beyond
the instructions listed below for battery and/or fuse replacement will void all warranties.
OPENING: Disconnect the test leads, turn off the meter and remove the holster. Remove the six hex head
screws in the face plate using the 2 mm hex wrench mounted in holster. Remove the rear case cover
carefully and place the front of the meter face down on a clean padded surface.
BATTERY REPLACEMENT: Disconnect the test leads, turn off the meter and remove the holster. Remove
the 4 hex head battery cover screws from the rear case cover using the 2 mm hex wrench as Shown in
Figure 5. Replace the battery with a NEDA type1604 or equivalent 9 V alkaline battery. Make sure the
battery compartment seal is in good condition and properly aligned before replacing the cover and
screws.
FUSE REPLACEMENT: Open the case by disconnecting the test leads, turn off the meter and remove the
holster. Remove the six hex head screws in the face plate using the 2 mm hex wrench mounted in the
holster. Remove the rear case cover carefully and place the front of the meter face down on a clean
padded surface. The fuses are located under a protective cover. Lift off cover and carefully remove the
fuse by gently prying under the fuse. Pry out the large fuse by placing a small flat screwdriver under
the fuse’s end caps. Do NOT use the gasket as a fulcrum point as this could permanently disfigure the
gasket.
 Warning
Use only the same size and type fuse specified. Use of higher amperage or lower voltage or different
type fuses could result in shock, injury and/or damage to the meter. Replacement fuse is:
2 A/1500 V fast blow ceramic size 8 x 65 mm (small) fuse. Amprobep/n: FP700.
CLOSURE: Replace the fuse cover and replace rear case cover careful not to bend or pinch the case rim
gasket. Reinstall the six hex-head screws with a gasket and washer and tighten securely with an even
amount of torque on each. Do NOT over tighten as this may strip case threading. Turn on the meter and
test operation. If working normally replace the holster.

Repair
All test tools returned for warranty or non-warranty repair or for calibration should be
accompanied by the following: your name, company’s name, address, telephone number,
and proof of purchase. Additionally, please include a brief description of the problem or
the service requested and include the test leads with the meter. Non-warranty repair or
replacement charges should be remitted in the form of a check, a money order, credit card
with expiration date, or a purchase order made payable to Amprobe® Test Tools.
In-Warranty Repairs and Replacement – All Countries
Please read the warranty statement and check your battery before requesting repair.
During the warranty period any defective test tool can be returned to your Amprobe® Test
Tools distributor for an exchange for the same or like product. Please check the “Where to
Buy” section on www.amprobe.com for a list of distributors near you. Additionally, in the
United States and Canada In-Warranty repair and replacement units can also be sent to a
Amprobe® Test Tools Service Center (see address below).
Non-Warranty Repairs and Replacement – US and Canada
Non-warranty repairs in the United States and Canada should be sent to a Amprobe® Test Tools
Service Center. Call Amprobe® Test Tools or inquire at your point of purchase for current repair and
replacement rates.
In USA In Canada
Amprobe Test Tools Amprobe Test Tools
Everett, WA 98203 Mississauga, ON L4Z 1X9
Tel: 877-AMPROBE (267-7623) Tel: [phone]
Non-Warranty Repairs and Replacement – Europe
European non-warranty units can be replaced by your Amprobe® Test Tools distributor for a nominal
charge. Please check the “Where to Buy” section on www.amprobe.com for a list of distributors near
you.
European Correspondence Address*
Amprobe® Test Tools Europe
P.O. Box 1186
5602 BD Eindhoven
The Netherlands
*(Correspondence only – no repair or replacement available from this address. European
customers please contact your distributor.)
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
FAX [phone] - TestEquipmentDepot.com

10
1
2
V
V
A
A
HD110C
V
A
COM
2A MAX
FUSED
MAX
1500V
1000V
OFF
20
M
2
M
200
k
20
k
2
k
200
IV
CAT
1000 V
200
mA
2 A
20
mA
2
mA
1500
1000
200
V
20
V
2
V
V
200
mV
200
A
HD110C
V
A
COM
2A MAX
FUSED
MAX
1500V
1000V
OFF
20
M
2
M
200
k
20
k
2
k
200
IV
CAT
1000 V
200
mA
2 A
20
mA
2
mA
1500
1000
200
V
20
V
2
V
V
200
mV
200
A
> 20V
4
2
0
2
0
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1
5
3
1
3
2
6
4A
4B
4C
5
2
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
FAX [phone] - TestEquipmentDepot.com

10
1
2
V
V
A
A
HD110C
V
A
COM
2A MAX
FUSED
MAX
1500V
1000V
OFF
20
M
2
M
200
k
20
k
2
k
200
IV
CAT
1000 V
200
mA
2 A
20
mA
2
mA
1500
1000
200
V
20
V
2
V
V
200
mV
200
A
HD110C
V
A
COM
2A MAX
FUSED
MAX
1500V
1000V
OFF
20
M
2
M
200
k
20
k
2
k
200
IV
CAT
1000 V
200
mA
2 A
20
mA
2
mA
1500
1000
200
V
20
V
2
V
V
200
mV
200
A
> 20V
4
2
0
2
0
0
1
5
3
1
3
2
6
4A
4B
4C
5
2

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