Greenlee 93-105 User manual

999 1927.3 © 1997 Greenlee Textron IM 1244 REV 3 12/97
INSTRUCTION MANUAL
DIGITAL/ANALOG
TRUE RMS MULTIMETER
93-105/00408
Read and understand this material before operating or
servicing this equipment. Failure to understand how to
safely operate this tool could result in an accident causing
serious injury or death.
AC
DC
-
+
AUTO
H
mVA
°CNµF
MkΩHz
MEM
REL MAX MIN
0
1
0
2
0
3
0
4
0
GREENLEE

Digital Multimeter
Cat./UPC No. 93-105/00408
-
Español; p. 25
Français; p. 49

2
A person who has not read and does not
understand all operating instructions is not
qualified to operate this tool.
Failure to read and understand safety instructions
can result in injury or death.
The symbol above is used to call your attention to instructions concern-
ing 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.
Immediate hazards which, if not avoided, WILL result in severe personal
injury or death.
Hazards or unsafe practices which, if not avoided, COULD result in severe
personal injury or death.
Hazards or unsafe practices which, if not avoided, COULD result in minor
personal injury or property damage.
SAFETY
ALERT
SYMBOL

93-105 / 00408
3
SAFETY INFORMATION
• Electric shock hazard. Contact with live circuits
can result in severe injury or death.
• Do not use the meter if it is wet or damaged.
Electric shock can result.
• Do not apply more than 1000 VDC or 750 VAC
between any terminal and earth ground. Electric
shock can result.
• Do not attempt to measure more than 1000 VDC
or 750 VAC. Electric shock can result.
• Do not attempt to measure more than 10 amps.
Electric shock can result.
• Do not open the case while the test leads are
connected to the circuit or while the meter is
ON. Electric shock or damage to the meter can
result.
Failure to observe these warnings can result in
severe injury or death.
• Do not connect the meter to a source of voltage or current when the
selector switch is in the position or the
position. Damage to the meter can result.
• Do not change the position of the selector switch when the test
leads are connected to a component or circuit. Damage to the meter
can result.
• Do not expose meter to extremes in temperature or high humidity.
Damage to the meter can result. See Specifications section of this
manual.
• Do not attempt to repair this test instrument. It contains no user-
serviceable parts.
Failure to observe these precautions can result in injury and can
damage the instrument.

4
IMPORTANT
• Using this meter near equipment that generates electro-magnetic
interference can result in unstable or inaccurate readings.
• Use only properly rated fuses when replacement is necessary.
• Replace weak or discharged batteries as soon as either of these
conditions is detected.
Description
The Greenlee 93-105 True RMS Multimeter is intended to measure current, resistance,
voltage, capacitance, and frequency, and to check diodes and continuity. The AC-coupled true
RMS responding function guarantees greater measurement accuracy than meters that use
AC-averaging RMS Responding. The large, easy-to-read 3-3/4 digital display is supplemented
by a 42-segment bar graph and function icons for optimum clarity. Automatic and manual
ranging options, minimum/maximum input recording mode, and store/recall functions provide
maximum measuring capability.
Purpose
This instruction manual is intended to familiarize operators with the safe operation of the
Greenlee 93-105 True RMS Multimeter. This manual should be kept available to all operating
personnel.

93-105 / 00408
5
FEATURES
Digital Display: 3-3/4 digit LCD display (maximum reading is 3999) and 42-segment analog
bar graph
Selector Switch: Measurement and range selector
1. AInput Terminal: For current measurements (400 mA. - 10 amps)
2. mA Input Terminal: For current measurements (400 mA. maximum)
3. COM Input Terminal: Negative, ground, or common terminal for all measurements
4. VΩInput Terminal: For any measurements except current
5. Function (unlabeled blue button): Select: AC or DC current, ohms or continuity, diode or
capacitance, frequency or adapter
6. MIN MAX: Monitors the input over a period of time; holds the minimum or maximum
value on the display
7. REL ∆(Relative Mode): Uses the present value as a reference to compare against a new
value
8. HOLD : Holds the present value on the display
9. PWR RST (Power Reset): Restores power after Auto Power Off
10. RANGE: Selects autoranging or manual ranging
11. STORE: Stores the present value in memory
12. RECALL: Restores the value in memory to the display
Fig. 1
Digital Display
Selector Switch
AC
DC
-+
AUTO
H
mVA
°CNµF
MkΩHz
MEM
REL MAX MIN
0
1
0
2
0
3
0
4
0
GREENLEE
Digital Multimeter
Cat./UPC No. 93-105/00000
-
5678
9101112
1234

6
Using the Features
Basic Features
•Range: Press RANGE once to change to manual ranging; the AUTO icon will disappear.
In the manual ranging mode, press RANGE to select the appropriate range for the measure-
ment you want to make. Press and hold RANGE for two seconds to return to the autoranging
mode. The AUTO icon will appear.
•Store: Press STORE and the MEM icon will appear. The value on the display will be stored in
the memory. If the meter shuts off automatically, press PWR RST (Power Reset) to restore
power without clearing the memory.
The memory will be cleared when the meter is turned OFF.
•Recall: Use this function after using Store. Press RECALL to restore the value in memory.
The icon will appear and the MEM icon will appear and blink. The data stored in memory
will appear. The automatic POWER-OFF feature is disabled.
Press HOLD to exit the Recall mode.
•Hold: Press HOLD and the icon will appear. The beeper will emit a tone and the
display will be held constant until HOLD is pressed again.
AC
DC
-
+
AUTO
H
mVA
°CNµF
MkΩHz
MEM
REL MAX MIN
0
1
0
2
0
3
0
4
0
-

93-105 / 00408
7
Advanced Features
Relative Mode (REL ∆)
1. Measure a value according to the operating instructions.
2. Press REL ∆. The REL icon will appear. The present value will be used as a reference value
and the display will change to all zeros.
3. Measure a new value. The display will show the difference between the stored reference
value and the present value.
4. Press REL ∆for two seconds to exit Relative Mode.
When measuring resistance, use the relative mode to use the resistance of the leads as a
reference value. This is the same as “zeroing” an analog meter. Then use the meter
according to the instructions to find the actual resistance value of a resistor or circuit.
MIN MAX
1. Measure a value in autoranging mode according to the operating instructions.
2. Press MIN MAX once and the and MIN icons will appear; press MIN MAX again and
the MAX will appear (MIN will disappear). The meter will begin to record the input.
3. (Optional) Press HOLD to stop recording; the display will be held constant. Press
HOLD again to resume recording; the display will become active again and the
minimum or maximum value will be updated.
4. Press MIN MAX to exit the MIN MAX mode.
Note: The Auto Power Off feature will shut the meter off after approximately 30 minutes.
Using MIN MAX and Hold: While using the Hold feature, press MIN MAX to go directly into
MIN MAX recording mode.

8
Electric shock hazard.
Contact with live circuits can result in severe injury
or death.
Do not attempt to measure more than 1000 VDC or 750 VAC. Electric
shock can result.
Operation
Turn the unit on and allow at least 30 seconds for warm-up.
Self-Test
Before using the meter, test it on a functioning circuit or component. If the test instrument
fails to perform as expected, refer to the following list until the problem is solved:
1. Test leads are not fully plugged into terminal inputs.
2. The test lead tips or connectors are corroded.
3. The battery is discharged and should be replaced.
4. A test lead is damaged.
5. The test instrument needs service.
Voltage Measurement
1. Plug the black test lead into the COM terminal. Plug the red test lead into the V Ω
terminal.
2. Set the selector switch to V(for AC) or V(for DC).
3. Connect the test leads to the circuit or component and read the display.

93-105 / 00408
9
Electric shock hazard.
Contact with live circuits can result in severe injury
or death.
Current Measurement
1. Shut off and lock out the power.
2. Open the branch of the circuit where the current is to be measured.
3. Plug the black test lead into the COM terminal.
4. Plug the red test lead into the Aterminal (for current measurements up to 10 A) or the mA
terminal (for current measurements up to 400 mA).
5. Set the selector switch to the appropriate setting. Press the function (blue) button to select
AC or DC current (the AC icon or the DC icon will appear).
6. Connect the test leads to the circuit.
7. Apply power to the circuit and read the display.
Notes:
• 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.
• For readings of less than 400 mA, plug the red test lead into the mA terminal.
8. Shut off power and disconnect the meter from the circuit.
Do not attempt to measure more than 10 amps. Electric shock can
result.
Do not change the position of the selector switch when the test leads are
connected to a component or circuit. Damage to the meter can result.

10
Resistance Measurement
Do not connect the meter to a source of voltage or current when the
selector switch is in the position. Damage to the meter can
result.
1. Shut off and lock out power. Make sure all capacitors are fully discharged. Voltage must
not be present.
2. Plug the black test lead into the COM terminal. Plug the red test lead into the V Ω
terminal.
3. Set the selector switch to .
4. Press the function (blue) button to select resistance; the Ωwill appear.
5. Connect the test lead tips together. Press REL ∆to “zero” the meter.
6. Connect the test leads to the component or circuit and read the display.

93-105 / 00408
11
Continuity Check
Do not connect the meter to a source of voltage or current when the
selector switch is in the position. Damage to the meter can
result.
1. Shut off lock out power. Make sure all capacitors are fully discharged. Voltage must not be
present.
2. Plug the black test lead into the COM terminal. Plug the red test lead into the V Ω
terminal.
3. Set the selector switch to .
4. Press the function (blue) button to select continuity; the and Ωicons will appear.
5. Connect the test leads to the circuit. The buzzer will sound if the resistance of the circuit is
less than approximately 40Ω.

12
Diode Check
Do not connect the meter to a source of voltage or current when the
selector switch is in the position. Damage to the meter can
result.
1. Shut off and lock out power. Make sure all capacitors are fully discharged. Voltage must
not be present.
2. Plug the black test lead into the COM terminal. Plug the red test lead into the VΩ
terminal.
3. Set the selector switch to .
4. Press the function (blue) button to select diode check; the icon will appear.
5. Do not touch the test leads to anything. Read the display. This value is the open circuit
voltage.
Note: The open circuit voltage, approximately 3.2 volts, depends on the battery condition.
6. Connect the test leads to the component and read the display. The expected display for a
diode in good condition is approximately as follows:
Note: A forward-biased reading of 000 (short circuit) or open circuit voltage indicates that
the diode is faulty.
A reverse-biased reading of 000 (short circuit) or less than the open circuit voltage
indicates that the diode is faulty.
Germanium-Based Diode Silicon-Based Diode
Forward-Biased .025 volts - 0.45 volts 0.5 volts - 0.9 volts
Reverse-Biased open circuit voltage open circuit voltage

93-105 / 00408
13
Capacitance Check
Do not connect the meter to a source of voltage or current when the
selector switch is in the position. Damage to the meter
can result.
1. Shut off and lock out power. Make sure all capacitors are fully discharged. Voltage must
not be present.
2. Plug the black test lead into the COM terminal. Plug the red test lead into the V Ω
terminal.
3. Set the selector switch to .
4. Press the function (blue) button to select capacitance check; the n F icon will appear.
Press REL ∆to “zero” the meter.
Note: Observe polarity when measuring polarized capacitors.
5. Connect the test leads to the component and read the display.
6. See the capacitor manufacturer’s specifications for the expected value.

14
Frequency Measurement
Electric shock hazard.
• Contact with live circuits can result in severe injury
or death.
• Do not measure the frequency if the voltage
exceeds 600 VAC RMS. Electric shock can result.
1. Plug the black test lead into the COM terminal. Plug the red test lead into the V Ω
terminal.
2. Set the selector switch to Hz/ADP.
3. Press the function (blue) button to select frequency measurement; the Hz icon will appear.
4. Connect the test leads to the circuit and read the display.
Note: The last one or two digits of the display may be unstable at frequencies below 1 kHz
and above 20 kHz.

93-105 / 00408
15
Adapter Measurement
Electric shock hazard.
• Contact with live circuits can result in severe injury
or death.
• Do not use the adapter function if the adapter’s
output exceeds 600 VDC or 600 VAC RMS.
Electric shock can result.
1. Plug the black or negative test lead into the COM terminal. Plug the red or positive test lead
into the V Ωterminal.
2. Set the selector switch to Hz/ADP.
3. Press the function (blue) button to select adapter; no icon will appear.
4. Follow the instructions supplied with the adapter or accessory.

16
400V, 1000V
AC Voltage
4V, 40V, 50Hz ~ 60Hz: ±(0.5% + 5 digits)
400V, 750V 40Hz ~ 1KHz: ±(1% + 5 digits)
Resolution: 0.1mV in 400mV range.
Input Impedence: 10MΩ<100pF
AC Conversion Type: AC-coupled, true rms responding, calibrated to the rms value sine
wave input. Specified accuracy is for sine wave at full scale and non-sine wave at half
scale below 500Hz with crest factor up to 2.
1100 V DC or
1100 V peak
DC Voltage
Range Accuracy
400mV ±(0.3% + 2 digits)
4V, 40V, ±(0.1% + 2 digits)
Over-Voltage Protection
1100 V DC or
1100 V peak

93-105 / 00408
17
DC Current
Range Accuracy Burden Voltage Input Protection
4 mA ~ 400 mA ±(0.4% + 2 digits) 800 mV max. 1A / 600V fuse
10A ±(0.8% + 4 digits) 1 V max. 15A / 600V fuse
AC Current (40 Hz ~ 1 kHz)
4 mA ~ 400 mA ±(1 % + 5 digits) 800 mV max. 1A / 600V fuse
10A ±(1 % + 5 digits) 1 V max. 15A / 600V fuse
Ranges: 4 mA, 40 mA, 400 mA, 10A
Resolution: 1 µA in the 4 mA range
AC Conversion Type: AC-coupled, true RMS responding, calibrated to the RMS value
sine wave input. The specified accuracy is for sine wave at full scale and non-sine wave
at half scale below 500 Hz with crest factor up to 2.

18
Ohms Accuracy
400Ω±(0.4% + 4 digits)
4kΩ, 40kΩ, 400kΩ±(0.4% + 2 digits)
4MΩ±(0.6% + 3 digits)
40MΩ±(1.5% + 5 digits)
Resistance
Input Protection
600 VDC or
600 V RMS AC
Resolution: 0.1Ωin 400Ωrange.
Open Circuit Voltage: 0.4V

93-105 / 00408
19
Continuity Test
Cont. Threshold Cont. Indicator Input Protection
40Ω(approx.) 2kHz (tone) 600V DC or RMS AC
Diode Test
Test Current Open Circuit Voltage Input Protection
0.6mA 3.0V DC (approx.) 600V DC or RMS AC
Capacitance
Ranges Resolution Input Protection
4, 40, 400nF; 4, 40µF 1pF in 4nF range 600V DC or RMS AC
Accuracy
Range Accuracy in Relative Mode
4nF ±(1% + 4 digits)
40nF ±(1% + 4 digits)
400nF ±(1% + 4 digits)
4µF±(1% + 4 digits)
40µF±(1% + 4 digits) (≤20µF)
±(5% + 8 digits) (>20µF)

20
Frequency Counter
Ranges Resolution Input Protection
100Hz; 1, 10, .01Hz in 100Hz range 600V DC or 600 V RMS AC
100 kHz; 1MHz
Accuracy Sensitivity
±(0.1% + 4 digits) 40mV rms for 1Hz~20kHz,
400mV rms for 20kHz~1MHz
Adapter Range
Display Accuracy Input Protection
10 counts/1mV, DC ±(0.1% + 2 digits) 600V DC or 600 V RMS AC