Greenlee 93-603 User guide

999 2301.7 © 1997 Greenlee Textron Inc. IM 1313 REV 1 4/97
Read and understand this material before operating this
meter. Failure to understand how to safely operate the meter
could result in an accident causing serious injury or death.
This meter should only be operated by qualified personnel.
93-603 MULTIMETER
OPERATION, MAINTENANCE AND
SAFETY INSTRUCTIONS
Español; p. 22
Français; p. 43
DCV
D
C
A
OHMh
FE
BATT TEST
OFF
ACV
20A mA COM VΩBAT

2
Safety Alert Symbol ........................................................................................3
Safety Information ...................................................................................... 4-5
Description......................................................................................................6
Features ..........................................................................................................7
Operation
Preparation for Use ....................................................................................8
Voltage Measurement ................................................................................9
Current Measurement ..............................................................................10
Resistance Measurement .........................................................................11
Continuity Check ......................................................................................12
Diode Check .............................................................................................13
Battery Check ...........................................................................................14
Transistor Check ......................................................................................15
Specifications.......................................................................................... 16-19
Maintenance
Replacing the Battery or Fuse ..................................................................20
Warranty .......................................................................................................21
Spanish Version............................................................................................22
French Version..............................................................................................43
TABLE OF CONTENTS

93-603 Multimeter
3
Hazards or unsafe practices which, if not avoided, COULD result in minor
personal injury or property damage.
Hazards or unsafe practices which, if not avoided, COULD result in severe
personal injury or death.
Immediate hazards which, if not avoided, WILL result in severe personal
injury or death.
SAFETY ALERT SYMBOL
The symbol above is used to call your attention to instructions concerning
your personal safety. Watch for this symbol. It points out important safety
precautions. It means “ATTENTION! Become alert! Your personal safety is
involved!” Read the message that follows and be alert to the possibility of
personal injury or death.
SAVETHESE INSTRUCTIONS
Additional copies of this manual are available upon request at no extra charge.

4
• Do not use the meter if it is wet or damaged.
• Do not attempt to measure more than 750 VAC or 1000 VDC.
• Do not attempt to measure more than 20 amps.
• Do not connect the meter to a source of voltage or current when the
range selector is in an Ωposition, the position, the
position, or the hFE position.
Failure to observe these warnings may result in serious injury or death.
SAFETY INFORMATION
Contact with live circuits will result in severe
injury or death.

93-603 Multimeter
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• Disconnect the test leads and turn the range selector to OFF before
removing the back of the case to replace the fuse or battery.
• Disconnect the test leads from the component or circuit under test
before changing the position of the range selector.
• Use only properly rated fuses when replacement is necessary.
See the Specifications section of this manual.
• Do not perform any service or maintenance other than as described
in this manual.
• Replace weak or discharged batteries as soon as either of these
conditions is detected.
• Do not expose meter to extremes in temperature or high humidity.
See Specifications section of this manual.
Failure to observe these precautions may result in injury and damage
to this instrument.
SAFETY INFORMATION (cont’d)

6
DESCRIPTION
The Greenlee 93-603 Multimeter is a multipurpose meter with the following measurement
functions and measurement ranges.
AC Voltage: 0–750 volts DC Current: 0–20 amps
DC Voltage: 0–1000 volts
Resistance: 0–20 megohms
Continuity Check
Diode Check
Battery Check: 1.5-volt and 9-volt batteries
Transistor Check

93-603 Multimeter
7
FEATURES (Fig. 1)
Fig. 1
1. Digital Display
• 3-1/2 LCD readout (maximum reading is ‘1999’)
• over-range indication (“1” or “-1” appears at far left of the display)
• automatic polarity indication
• “LB” low battery icon.
2. Range Selector
Used to select the desired function and/or range:
• AC or DC voltage • DC current
• Resistance • Continuity Check
• Diode Check • Battery Check (for 1.5-volt and 9-volt batteries)
• Transistor Check
3. Transistor Receptacle - receptacles for the emitter (E), base (B), and collector (C) leads of
NPN or PNP transistors
4. 20A Input Terminal - positive (+) input terminal for DC current measurements between
200 mA and 20 A
5. mA Input Terminal - positive (+) input terminal for DC current measurements below
200 mA
6. COM Input Terminal -
negative (-) input terminal
for voltage, current, and
resistance measurements,
and for continuity, diode,
battery, and transistor
checks
7. VΩBAT Input Terminal -
positive (+) input terminal
for voltage and resistance
measurements and for
continuity, diode, battery,
and transistor checks
OPEN
DCV
D
C
A
OHM
BATT TEST
OFF
ACV
20A mA COM VΩBAT
1
2
3
47
5 6

8
OPERATION
Preparation for Use
Before using the meter, check a functioning circuit or component. If the meter fails to perform
as expected, refer to the following troubleshooting list until the problem is solved:
1. Test leads are not fully plugged into the input terminals.
2. The test lead tips or test lead connectors are corroded.
3. The battery should be replaced.
4. A test lead is damaged.
5. The input terminals are corroded.
6. The meter needs service.

93-603 Multimeter
9
Disconnect the test leads from the component or circuit under test
before changing the position of the range selector.
Failure to observe this precaution may result in minor injury and/or
damage to this instrument.
Do not attempt to measure more than 750 VAC or 1000 VDC.
Failure to observe this warning may result in serious injury or death.
Contact with live circuits will result in severe
injury or death.
Voltage Measurement
1. Plug the black test lead into the COM input terminal, and plug the red test lead into the
VΩBAT input terminal.
2. Set range selector to the appropriate DCV or ACV range.
Note: When measuring an unknown voltage, start at the highest range.
3. Touch the test leads to the circuit under test and read the display.
Note: If the resolution of the reading is not satisfactory, disconnect the meter from the circuit
and switch to the next lower range. Reconnect the meter to the circuit and read the
display. Repeat this procedure until the resolution is satisfactory.

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Current Measurement
Do not attempt to measure more than 20 amps.
Failure to observe this warning may result in serious injury or death.
Contact with live circuits will result in severe
injury or death.
1. Shut off and disconnect power to the circuit to be tested.
2. Open the branch of the circuit where the current is to be measured.
3. Plug the black test lead into the COM input terminal, and plug the red test lead into the
appropriate current input terminal.
Note: When measuring an unknown current, start with the red test lead plugged into the
20 A input terminal.
4. Set range selector to the appropriate DCA range.
Note: When measuring an unknown current, start at the 20 A range.
5. Connect the test leads to the circuit.
6. Apply power to the circuit under test and read the display.
Note: If the resolution of the reading is not satisfactory, shut off power to the circuit and
switch to the next lower range. Turn on the power to the circuit and read the display.
Repeat this procedure until the resolution is satisfactory.
Note: If the range selector must be changed from 20A range to the 200 mA range to obtain
finer resolution, you must also unplug the red test lead from the 20 A input terminal and
plug it into the mA input terminal.
7. Shut power off and disconnect the meter from the circuit.
8. Reconnect the circuit.

93-603 Multimeter
11
Resistance Measurement
Disconnect the test leads from the component or circuit under test
before changing the position of the range selector.
Failure to observe these precautions may result in injury and damage
to this instrument.
Do not connect the meter to a source of voltage or current when the
range selector is in an Ωposition.
Failure to observe this warning may result in serious injury or death.
1. Shut off and disconnect the power. Make sure all capacitors are discharged. Voltage must
not be present.
2. Plug the black test lead into the COM input terminal, and plug the red test lead into the
VΩBAT input terminal.
3. Set the range selector to the 200 Ωposition.
4. Touch the test lead tips together. The meter should display “0”. If the meter does not
display a “0”, make a note of the reading.
5. Set range selector to the appropriate Ωrange.
Note: If measuring an unknown resistance, set the range selector to the 20M range.
6. Touch the test leads to the circuit or component under test and read the display.
7. Subtract the value obtained in step 4 from the reading on the display to find the actual
resistance.
Note: If the resolution of the reading is not satisfactory, disconnect the meter from the circuit
or component and switch to the next lower range. Reconnect the meter to the circuit or
component and read the display. Repeat this procedure until the resolution is
satisfactory.

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Continuity Test
Disconnect the test leads from the component or circuit under test
before changing the position of the range selector.
Failure to observe this precaution may result in minor injury and/or
damage to this instrument.
1. Shut off and disconnect the power. Make sure all capacitors are discharged. Voltage must
not be present.
2. Plug the black test lead into the COM input terminal, and plug the red test lead into the
VΩBAT input terminal.
3. Set range selector to the position.
4. Touch the test leads to the circuit under test. The buzzer will sound continuously if the
resistance of the circuit is approximately 40Ωor less.
Note: The display will not correspond to the circuit resistance.
Do not connect the meter to a source of voltage or current with the
range selector in the position.
Failure to observe this warning may result in serious injury or death.

93-603 Multimeter
13
Diode Check
Disconnect the test leads from the component or circuit under test
before changing the position of the range selector.
Failure to observe this precaution may result in minor injury and/or
damage to this instrument.
1. Shut off and disconnect the power. Make sure all capacitors are discharged. Voltage must
not be present.
2. Plug the black test lead into the COM input terminal, and plug the red test lead into the
VΩBAT input terminal.
3. Set range selector to the position.
4. Touch the test leads to the diode under test and read the display. The expected display is
approximately as follows:
Note: Any other reading indicates that the diode is defective.
Germanium-Based Diode Silicon-Based Diode
Forward-Biased 0.25 volts – 0.45 volts 0.60 volts – 0.90 volts
Reverse-Biased “1” (at the left side of the display) “1” (at the left side of the display)
Do not connect the meter to a source of voltage or current with the
range selector in the position.
Failure to observe this warning may result in serious injury or death.

14
Battery Check
1. Plug the black test lead into the COM input terminal, and plug the red test lead into the
VΩBAT input terminal.
2. Set range selector to the appropriate BATT TEST range.
Note: To measure the voltage of a 1.5-volt battery, set the range selector to 1.5 V BATT TEST.
To measure the voltage of a 9-volt battery, set the range selector to 9V BATT TEST.
3. Touch the red test probe to the positive (+) terminal of the battery, and touch the black test
probe to the negative (–) terminal of the battery.
4. Read the display.
Note: The voltage on the display is the voltage of the battery under load. The load current for
the 9V battery is approximately 9 mA. The load current for the 1.5V battery is
approximately 150 mA. The display value corresponds with the battery’s residual
voltage.

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1. Turn the range selector to the appropriate hFE position (NPN or PNP) .
2. Insert the transistor’s emitter (E), base (B), and collector (C) leads into the corresponding
E, B, and Creceptacles.
Note: For convenience, the 93-603 has two inputs labeled “E” for the emitter lead.
3. Read the display.
4. Refer to the transistor manufacturer’s specifications for the expected hFE reading.
Disconnect the test leads from the component or circuit under test
before changing the position of the range selector.
Failure to observe these precautions may result in minor injury and/or
damage to this instrument.
Do not connect the meter to a source of voltage or current with the
range selector in an hFE position.
Failure to observe this warning may result in serious injury or death.
TRANSISTOR CHECK

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SPECIFICATIONS
Display: 3-1/2 digit LCD (liquid crystal display) with a maximum reading
of 1999
Polarity Indication: positive implied, negative indicated
Sampling: 3 times per second
Low Battery Indication: LBis displayed when the battery voltage drops below the operating
voltage
Overload Indication: “1” at the left side of the display
Operating Temperature
and Humidity: 32°F – 104°F (0°C – 40°C), 80% relative humidity maximum
Storage Temperature
and Humidity: 14°F – 122°F (-10°C – 50°C) 80% relative humidity maximum
Power Requirements: 9V battery (006P) Alkaline
Fuse: 0.5 A/250V
Dimensions: 7.24 x 3.3 x 1.61 in. (18.4 x 8.4 x 4.1 cm)
Weight: 10.48 oz (297 g)
Accuracy: +/– (% of reading + number of digits)
see the following specification tables for accuracies
of specific functions

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DC Voltage
Range Resolution Accuracy Overload Protection
200 mV 0.1 mV +/– (0.5% + 1 digit) 500 VDC or 350 VAC RMS
2 V 1 mV
20 V 10 mV +/– (0.7% + 1 digit) 1100 VDC or 800 VAC RMS
200 V 100 mV
1000 V 1 V
Input Impedance: 10 MΩ
AC Voltage (50 Hz – 400 Hz)
Range Resolution Accuracy Overload Protection
200 V 100 mV +/– (1.2% + 3 digits)
750 V 1 V +/– (1.5% + 1 digit)
Input Impedance: 10 MΩ
1100 VDC or 800 VAC RMS

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Direct Current
Range Resolution Accuracy Overload Protection
200 µA 0.1 uA
2 mA 1 µA +/– (1.0% + 1 digit) 0.5 amp/250V fuse
20 mA 10 µA and diodes
200 mA 100 µA +/– (1.5% + 1 digit)
20 A 10 mA +/– (2.0% + 1 digit) none
Burden voltage: 0.7 V maximum in the 20 A range
0.3 V maximum in all other ranges
Maximum voltage: 250 volts maximum when measuring current
Resistance
Range Resolution Accuracy Overload Protection
200 Ω0.1 Ω350 VDC or 250 VAC RMS
2 KΩ1 Ω
20 KΩ10 Ω+/– (1.2% + 2 digits)
200 KΩ100 Ω500 VDC/VAC RMS
2 MΩ1 K Ω
20 MΩ10 K Ω+/– (1.8% + 2 digits)
Open circuit voltage: ≈3V in the 200Ωrange
≈0.35V in all other ranges

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Diode Check
Range Resolution Test Current Overload Protection
1 mV ≈1 mA 500 VDC/VAC RMS
Open circuit voltage: 3 VDC
Continuity Check
Range Continuity Threshold Continuity Indication Overload Protection
less than 40ΩAudible Buzzer 250 VDC/VAC RMS
Open circuit voltage: 3 VDC
Transistor Check
Range hFE Range Test Current Test Voltage
hFE 0 - 1000 IB ≈10 µA 3 VDC
Battery Check:
Range Resolution Load Current Load Resistance
1.5 V 1 mV 150 mA 10 Ω
9V 10 mV 9 mA 1 KΩ

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MAINTENANCE
Replacing the Battery or Fuse (See Figure 2)
1. Disconnect the test leads from the circuit under test and set the range selector to OFF.
Remove the test leads from the meter.
2. Remove the protective boot from the meter.
3. Slide off the battery and fuse compartment door.
4. Remove and replace the battery or fuse(s) as necessary.
5. Replace the battery and fuse compartment door. If you have replaced the battery, properly
dispose of the used battery.
Fig. 2
BATTERY
9V
FUSE
SPARE FUSE