KYORITSU 1109S User Manual

INSTRUCTION MANUAL

ANALOGUE MULTIMETER

KEW 1109S

Table of Contents

Page

1. Safety Warnings ............................................................................... 1

• Understanding Some of the Basics in Electrical Testing

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Before Using the Multimeter .......................................................... 3

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2. Features ........................................................................................... 5

3. Specifications ....................................................................................6

4. Instrument Layout ............................................................................. 8

5. How to Read Scales ......................................................................... 9

6. Operating Instructions ..................................................................... 11

6-1 Preparation ................................................................................ 11

6-2 DC Voltage Measurements ...................................................... 12

6-3 AC Voltage Measurements ....................................................... 13

6-4 Low Frequency (dB) Measurements ........................................ 14

6-5 AC Output Voltage Measurements Using Output

Terminal ................................................................................... 15

6-6 DC Current Measurements ...................................................... 16

6-7 Resistance Measurements ....................................................... 17

6-8 Terminal Current LI, Terminal Voltage LV &

Diode Test ................................................................................ 20

6-9 Measuring I

6-10 Measuring h

7. Fuse & Battery Replacement .......................................................... 27

(leakage current of transistors) ......................... 22

CEO

(DC Current Amplification Factor) ................... 24

FE

1. Safety Warnings

The instrument must be used by a competent, trained p erson and
operated in strict accordance with the instructions. Kyoritsu Electrical
Instruments Works, Ltd will not accept liability for any damage or injury
caused by misuse or non-compliance with the instructions or safety
procedures. It is essential to read and understand the safety rules
contained in the instructions. They must be observed when using the
instrument.

● This instruction manual contains warnings and safety rules

which must be observed by the user to ensure safe operation of
the instrument and retain it in safe condition for a long period.
Therefore, read these operating instructions thoroughly and
completely before using the instrument.

WARNING

#

This is a warning for the user to avoid electric shock hazard.
The symbol # on the instrument means that the user must read the
instructions in this manual for safe operation of the instrument.

CAUTION

#

This is a caution for the user to avoid damage to the instrument.

WARNING

#

● Never open the back case during measurements.

● Never use the instrument to measure voltage higher than 250V

on an industrial power line.

● When meas ur in g a high voltage greater t ha n 250V (in s ma ll

power supply circuit and not on power transmission line),
connect the test leads to the circuit under test after it is once
de-energized. Do not touch the wiring or test leads by hand
during voltage measurements. After the measurements, turn off
power to the circuit under test and disconnect the test leads.

Never test a circuit voltage higher than 250V with the rang e

selector switch erroneously set to one of the current or
resistance range positions. The fuse may not protect the circuit.

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● Never use the instrument in an explosive atmosphere especially

when making current measurements.

CAUTION

#

● Before makin g mea surements check that the range selec tor

switch is at a proper range position. Make sure to remove the
tips of the test leads from the circuit under test when changing
the measuring range during measurements.

● Do not apply voltage to the current or resistance ranges. It may

result in a fuse blow or instrument damage.

● Make certain to set the range selector switch to the OFF position

after every use.

● It is recommended that the range selector switch should be set
to the 250mA DC position to protect the instrument against the

possible shock or vibration in transit.

Note: Take good care not to make voltage measurements with

the range selector switch at the 250mA DC position. The

fuse may blow or instrument get damaged.

● Do not exp o se the ins t r ument to the di r e ct sun, ext r eme

temperature and humidity or dew fall for a long period. Also, care
must be taken not to give a shock to the instrument by dropping
or inadequate handling.

● Since the meter cover has been given an anti-static treatment

do not rub it strongly with a dry cloth. Where anti-static charges
are present on the meter window after it has been used for a
long period of time, causing the meter pointer to deflect in an
abnormal way, coat its surface with anti-static chemicals for
plastics or wipe it with a dilute solution of anti-static fluid as a
temporary measure.

● Understanding Some of the Basics in Electrical Testing Before

Using the Multimeter

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● Auxiliary Units (Prefixes)

There are a number of measurement units used for multimeters.
Vol t (V), am p e r e (A) an d ohm (Ω ) are mo s t widely us e d as

meas ure ment un its to indi cat e electri cal p otent ial , current a nd
resistance. However, it is not always straitforward to handle these
units as they sometimes too large or too small for practical use or
calculation. Prefixes are therefore used as auxiliary units to simplify
the usage of such measurement units.

The following table shows some of the examples:

Auxiliary Unit M k m μ n P

Read mega- kilo- milli- micro- nano- pico-

Multiply 10

Example

6

2MΩ

＝

2000kΩ

3

10

2kΩ

＝

2000Ω

-3

10

250mA

＝

0.25A

-6

10

50μA

＝

0.05mA

10-9 10

200nF

＝

0.2μF

-12

1000pF

＝

0.001μF

● Notes on Voltage & Current Measurements

It is important to understand the basic differences between current

and voltage measurements for proper use of multimeters.

Voltage measurements are designed to detect potential difference

between two points. Make certain that the multimeter is connected in
parallel with the circuit under test.

Current measurements are intended to monitor the consumption of

current in the circuit resulting from the application of voltage. Make
sure to connect the multimeter in series with the circuit under test.

Generally speaking, the internal resistance of a voltmeter should

preferably be larger, while that of an ammeter should be smaller. If
the multimeter is erroneously connected in parallel with a circuit for
current measurements, the likely result will be the flow of excessive
current and aubsequent damage to the fuses and other electronic
components. To avoid such a potential danger it is necessary to have
a good understanding of voltage and current measurements.

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Voltage Measurements Current Measurements

IR+I

M  IR

> > I

M

↓ ↓

R

M・IR

< < E

R

M・IR

I

M

I

R

I

R

Power
Source

Power
Source

E E
Load Load

R

M

= ∞

DC.V Range DC.mA Range

＋

＋

−COM

−COM

＋

−

−

RM = 0

V

mA

mA

Battery
(Power
Source)

Battery
(Power
Source)

Battery
(Power
Source)

Battery
(Power
Source)

Resistor

(Load)

Resistor

(Load)

(Parallel Connection) (Series Connection)

Measuring voltage at both ends
of a resistor.

.......... Meter Current

I

M

I

.......... Load Current

R

E .......... Power Source Voltage

RM ........ Internal Resistance of Multimeter

M e a su r in g c u r r e n t b ei ng
consumed by a resistor.

Fig. 1

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2. Features

● Mirrored scale for easy and accurate reading.

● 19 measuring ranges for a wide scope of application.

● OUTPUT terminal to cut off the DC component of AC voltage being
measured.

● hFE scale for transistor checking.

● dB scale (−10 - +62dB).

● Safety designed input terminals and test leads.

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3. Specifications

Functions Measuring Ranges Accuracy

0-0.1 V
0-0.5V
0-2.5V

DC Voltage
(7 ranges)

AC Voltage
(4 ranges)

DC Current
(4 ranges)

Resistance
(4 ranges)

Current across Terminals at
Resistance Range (LI)
(4 ranges)

Voltage across Terminals at
Resistance Ranges (LV)
(4 ranges)

0-10V (20kΩ/V)

0-50V
0-250V
0-1000V

0-10V

0-50V (9kΩ/V)

0-250V
0-1000V

0-50μA

0-2.5mA

0-25mA

0-250mA

0-2kΩ (20Ω mid-scale)
0-20kΩ (200Ω mid-scale)
0-2MΩ (20kΩ mid-scale)
0-20MΩ (200kΩ mid-scale)

0-150mA (x1 range)
0-15mA (x10 range)
0-150μA (x1k range)

0-60μA (x10k range)

0-3V (x1 , x10, x1 k ranges)

0-12V (x10k)

terminal voltage

(

approx. 100mV

terminal voltage

(

approx. 100mV

terminal voltage

(

approx. 150mV

terminal voltage

(

approx. 550mV

)
)
)
)

±3% of full scale

±3% of full scale

±3%

of full scale

±3% of scale length

±5% of scale length
(Battery voltage at 3V)

(Battery voltage at 12V)

±5% of scale length
(Battery voltage at 3V)

(Battery voltage at 12 V)

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Low Frequency
Output Using
OUTPUT Terminal

Low Frequency
Output (dB)
(4 ranges)

0-10V
0-50V
0-250V
0-1000V

10V AC

10 - +22dB

−

50V AC +4 - +36dB
250V AC +18 - +50dB
1000V AC +30 - +62dB
(0 dB = 0.775V(1mW)

Refer to frequency
characteristic chart

Refer to frequency
characteristic chart

across a 600Ω line)

DC Current Amplication
Factor (hFE) (1 range)

hFE: 0-1000 (atΩ× 10 range)

±3% of scale length

Dimensions: 100 (W) x 150 (L) x 47 (D)mm
Weight: Approx. 330g
Accessories: Test Leads (Model 7210) - 1 set

F250V 0.5A fuse - 2 pcs. (including one spare fuse

also installed into the housing case)

1.5V Battery Type R-6P, SUM-3, AA or equivalent -

2 pcs.
(Installed into the instrument)
9V Battery Type 6F22, 006P PP3, or equivallent

- 1 pce (installed into the instrument)
Instruction Manual - 1 copy

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4. Instrument Layout

①

⑥

⑦
⑧

⑨

⑩

⑪

②

③

④

⑤

OUTPUT Terminal

③

-COM (N) Terminal

⑤

Mirrored Scale Plate

⑦

Housing Case

⑨

Range Selector Switch

⑪

Meter Pointer

①

Meter Zero Adjust Screw

②

+(P) Terminal

④

Front Panel

⑥

Meter Window

⑧

Ohm Zero Adjust Knob

⑩

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5. How to Read Scales

DC Voltage
(7 ranges)

AC Voltage
(4 ranges)

DC Current
(4 ranges)

Resistance
(4 ranges)

Current
across
Terminals
(LI)(4 ranges)
Voltage
across
Terminals
(LV)(4 ranges)

Measuring
Ranges

0.1V

0.5V

2.5V
10V
50V
250V
1000V
10V
50V
250V
1000V

50μA

2.5mA
25mA
250mA
X1Ω
x10Ω
x1kΩ
X10kΩ
X1Ω
X10Ω
X1kΩ
X10kΩ
x1Ω
X10Ω
X1kΩ
X10kΩ

Scales

B 10
B50
B 250
B 10
B50
B250
B10

C10

B50
B250
B10
B50
B250
B250
B250
A 0-2k
A0-2k
A0-2k
A0-2k
E15
E15
E15
E15

F3
F3
F3
F3

H o w t o
Read
Scales

X0.01
X0.01
X0.01
X1
X1
X1
X100
X1
X1
X1
X100
X 1
X0.01
X0.1
X1
X1
X10

X1k
X10k
X10(mA)
X1(mA)
X 10(μA)
X 4(μA)
X1(V)
X1(V)
X1(V)
X4(V)

input
Terminals

+&

COM

−

+&

COM

−

+&

COM

−

+&

COM

−

+&−COM

+&−COM

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