Operating Instructions
Model MM45
Digital Multimeter
SAFETY INFORMATION
The following safety information must be observed
to ensure maximum personal safety during the
operation of this meter:
Do not use the meter if the meter or test leads look
damaged, or if you suspect that the meter is not
operating properly.
Never ground yourself when taking electrical
measurements. Do not touch exposed metal pipes,
outlets, fixtures, etc, which might be at ground
potential. Keep your body isolated from ground by
using dry clothing, rubber shoes, rubber mats, or
any insulating material.
Turn off power to the circuit under test before
cutting, unsoldering, or breaking the circuit. Small
amounts of current could be dangerous.
Use caution when working above 60V DC or 30V AC
rms. Such voltages pose a shock hazard.
When using the probes, keep your fingers behind
the finger guards on the probes.
MM45 REV3 7/05
NOTE
This instrument is only to be used by a suitably
trained and competent person.
The symbols used on this instrument are:
Measuring voltage which exceeds the limits of the
multimeter may damage the meter and expose the
operator to a shock hazard. Always recognise the
meter voltage limits as stated on the front of the
meter.
SPECIFICATIONS
Display: 3½ digit liquid crystal display (LCD) with a
maximum reading of 3200.
Analog bar graph: 34 segments with measurements
12 times per second.
Polarity: Automatic,(-) negative polarity indication.
Overrange: “OL” mark indication.
Zero: automatic.
Low Battery Indication: The
is displayed when
the battery voltage drops below the operating level.
Measurement rate: 2 times per second, nominal.
Operating environment: 0°C to 50°C at < 70% R.H.
Storage temperature: -20°C to 60°C, 0 to 80% R.H.
with battery removed from meter.
Battery life: 200 hours typical with carbon-zinc.
Battery: Single standard 9-volt battery, MN1604,
NEDA 1604, JIS 006P, IEC 6F22, PP3.
Dimensions: 147mm (H)x 70mm (W)x 39mm (D).
Weight: Approx. 345g (11.8 oz) including holster.
Auto power off: Meter automatically shuts down after
approx. 10 minutes of inactivity.
Accessories: One pair test lead, One spare fuse, 9V
battery (installed) and Operating Instructions.
Range
320mV
3.2V
32V
320V
600V
Range
320µA
3200µA
32mA
320mA
10A
Range
320
Ω
3.2k
Ω
32k
Ω
320k
Ω
3.2M
Ω
32M
Ω
0-2000
Range
320
Ω
Voltage
(50/60Hz)
Current
(50/60Hz)
OHM
Diode
Test
Continuity
Check
AC Accuracy
N / A
± 2.0% rdg+4d
AC Accuracy
± 2.5% rdg+4d
± 3.5% rdg+4d
Accuracy
± 2.0% rdg+3d
± 1.5% rdg+3d
± 2.5% rdg+3d
± 5.0% rdg+5d
± 10% rdg+2d
Audible Indication
< approx. 20
Ω
Input Impedance
> 1000M
Ω
11M
Ω
10M
Ω
Voltage Burden
0.2V
2V
0.2V
2V
2V
Test Current
< 0.7mA
< 0.13mA
< 13µA
< 1.3µA
< 0.13µA
0.5mA (Vf = 0.6V)
Test Current
< 0.7mA
DC Accuracy
± 1.2% rdg+1d
± 0.8% rdg+1d
± 1.2% rdg+1d
DC Accuracy
± 2.0% rdg+1d
± 3.0% rdg+3d
Resolution
100m
Ω
1
Ω
10
Ω
100
Ω
1k
Ω
10k
Ω
1mV
Resolution
100m
Ω
Caution, risk of electric shock
Caution, refer to accompanying
documents
Equipment protected throughout
by Double Insulation (Class II)
Alternating current
Direct current
Ground
z
Maximum Input
600VDC or
600VAC rms
Input Protection
0.5A/250V fuse
10A/250V fuse
Input Protection
500VDC or
500VAC rms
500V DC or AC rms
Input Protection
500V DC or AC rms
~
HIGH ENERGY SYSTEMS
GS38 advises fused test leads to be used when
working on high energy systems. Suitable leads
are Martindale TL55.
The instrument meets the requirements for double
insulation to BS EN 61010-1 at 600V Installation
Category
III
. Installation Category
III
(distribution
level) relates to transient overvoltage likely to be
found in fixed installation wiring.
