Milwaukee 2236-20 Betriebsanleitung

MILWAUKEE ELECTRIC TOOL CORPORATION – TEST & MEASUREMENT PRODUCT

REPAIR SERVICE INSTRUCTIONS — CALIBRATION

2236-20 Clamp Meter for HVAC/R

Environmental

Condition

Perform all calibration at an ambient temperature of 23°C ± 2°C / 73.4°F ± 3.6°F and relative

humidity of 80% - allow the fork meter to sit at this temperature for a minimum of 30

minutes before proceeding.

REPAIR SERVICE

INSTRUCTIONS

Calibration

MILWAUKEE ELECTRIC TOOL CORPORATION

13135 WEST LISBON ROAD ●BROOKFIELD, WISCONSIN 53005-2550 ●USA

58-92-2236d2 06/2012

2237-20 Clamp Meter

STNETNOCFOELBAT Page

Introduction 1

Precautions and Safety Information 1

Symbols 1

Safety 2

Specifications 3

General Specifications 3

Voltage Specifications 4

Current Specifications 4

Resistance Specifications 4

Continuity Specifications 4

Capacitance Specifications 4

Temperature Specifications 5

Physical and Environment Characteristics 6

Certification and Compliance 6

Basic Maintenance 6

Opening the Meter Case 6

Replacing the Battery 6

Performance Tests 7

Testing the Display 7

Component Layout and Spare Parts List 8

Disassembly 9

Removal of Battery Cover 9

Removal of Panel 9

Removal of PCB 9

Removal of Jaws 9

Adjustment Procedures 9

Required Equipment and Tools 9

Current Value for Adjustment 10

Check for Low Battery warning 10

DC Voltage Adjustment 10

AC Voltage Adjustment 10

AC Current Adjustment 11

Jaw Balance Adjustment 11

Off-Set adjustment for DC Current (2237-20) 11

Check for Accuracy at 600A Function 11

DC uA Adjustment (2236-20) 11

Electric Capacity Function 11

Temperature Measurement Function (2236-20) 12

Operation Check 12

Resistance Function 12

Continuity Function 12

Frequency Function (2237-20) 12

Current Function 13

DC Current Function (2237-20) 13

DC uA Function (2236-20) 13

Trouble Shooting 13

Trouble Shooting - continued 14

Introduction

WARNING

To avoid shock or injury, do not perform the verification tests or calibration procedures

described in the manual unless you are qualified to do so.

The information provided in this document is for the use of qualified personnel only.

CAUTION

The 2236-20 and 2237-20 contain parts that can be damaged by static discharge.

Follow the standard practices for handling static sensitive devices.

Precautions and Safety Information

Use the Meter only as described in the Operator’s Manual. If you do not do so, the protection provided

by the Meter may be impaired. Read the “Safety Information” page before servicing this product.

In this manual, a WARNING identifies conditions and actions that pose hazard (s) to the user; a

CAUTION identifies conditions and actions that may damage the Meter or the test instruments.

The Symbols

The symbols used on the Meter and in this manual are explained in Table 1.

Table A. The Symbols

Risk of electric shock

See instruction card

DC measurement

Equipment protected by double or

reinforced insulation

Battery

Earth

AC measurement

Conforms to EU directives

Application around and removal from hazardous

live conductors is permitted.

Do not discard this product or throw away.

SAFETY

Review the following safety precautions to avoid injury and prevent damage to this product or

products connected to it. To avoid potential hazards, use the product only as specified.

CAUTION: These statements identify conditions or practices that could result in damage to

the equipment or other property.

WARNING: These statements identify conditions or practices that could result in personal

injury or loss of life.

Specific precautions

Do not operate without covers. To avoid personal injury, do not apply any voltage or current to

the product without covers in place.

Electric overload. Never apply a voltage to a connector on the product that is outside the range

specified for that connector.

Avoid electric shock. To avoid injury or loss of life, do not connect or disconnect probes or test

leads from the meter while they are connected to a voltage source.

Do not operate in wet/damp conditions. To avoid electric shock, do not operate this product in

wet or damp conditions.

To reduce the risk of injury, user must read and understand operator’s manual.

SPECIFICATIONS

All specifications are warranted unless noted typical and apply to the 2236-20 and 2237-20.

Stated accuracies are at 23°C±5°C at than 80% relative humidity and without the battery

indicator displayed.

General specifications

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Overrange display Display "OL" when the reading exceeds

range by 10%

Low voltage indicator is indicated

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Maximum input voltage 600V CAT lll between V and COM

Maximum floating voltage

600V CAT lll between any terminal and earth

ground

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Measurement Specifications

Accuracy is ±(% reading + number of digits) at 23°C ± 5°C, less than 80% R.H.

Temperature coefficient: 0.1 * (Specified accuracy)/°C, <18°C, >28°C

(1) DC Voltage

Range Resolution Accuracy

60.0V 0.01V

600V 0.1V

±(1% reading + 3 digits)

(2) AC Voltage

Range Resolution Accuracy (Sine Wave)

0.05V 0.01V

600V 0.1V

±(1.5% reading + 4 digits) (50/60 Hz)

(3) DC μA

600.0μA 0.1μA ±(1% reading + 5 digits)

±(3.5% reading + 5 digits)

(40~400 Hz)

(4) AC Current

Range Resolution Accuracy

(5) Resistance

Range Resolution Accuracy

600Ω/6kΩ 0.1Ω/0.001kΩ

(6) Continuity

Range Resolution Accuracy

Continuity Buzzer

0-600.0Ω

±2.0% rdg ± 5dgt (50/60Hz)

±3.5% rdg ± 5dgt (40 ~ 400Hz)

* Add 2% at CF>2

* < 5A, add 3dgt

0.5 to 600.0A

Peak 1500A

CF = 2.5 @ 600A

CF = 3.0 @ 500A

0.1A

±1.0% rdg ± 5dgt

Buzzer sounds at 45Ω or less

(7) Capacitance

0.01nF/0.1nF/

0.001μF/0.01μF/

0.1μF/1μF

Range Resolution Accuracy

0.01nF-39.99nF ±2.5% ±2nF

40.00nF-1000uF ±2.5% ±20dgt

1000uF > ±5% ±20dgt

0.01nF - 4000μF

Auto-ranging

Range Resolution Accuracy

(8) Temperature

-40ºC ~ 400ºC

-40ºF ~ 20.0ºF

20.1ºF ~ 752ºF

(9) Volt Sense

Volt Sense Light should be on at 90V @ 1 inch (2.54 cm).

(10) Thermocouple

K Type Class II Thermocouple with standard dual banana jack.

Measurement Range: -40.0°C ~ 260.0°C (-40.0°F ~ 500.0°F)

Accuracy: ±2.5°C

(11) Over-range Indication

Display “OL” when the reading exceeds the measuring range.

(12) Rotary Switch

In order to prevent a “0” reading, the contacts about the input signal must be made properly

before the contact of the function selection.

(13) Auto Power Off

The meter automatically turns the power off after powering up and no operation for 20 ±5

minutes.

Press any key or rotate the rotary to power up.

Range Resolution Accuracy

0.1°C

0.1ºF

±1% ±2.0ºC

±1.5% ±4.0ºF

±1.5% ±2.0ºF

(14) Battery: Alkaline 1.5V Battery * 2, LR6

(15) Battery life (ALKALINE):

Approx. 30 hours, all lights on.

(16) Overvoltage Category

IEC 61010-1 600V CAT. III

(17) Operating Temperature

-10°C to 50ºC (14ºF to 122ºF)

(18) Storage Temperature

-40°C to 60ºC (-40º to 140ºF) (No batteries)

Physical and Environmental Characteristics

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Vibration & shock Operating MIL-PRF-28800F for Class 2 Instrument

Indoor Use

Certifications and compliances

SafetyDesigned to IEC61010-1, UL61010-1 and CSA specifications

Category Ill 600V.

Input rating

CAT IV : The source of the Low-Voltage installation.

CAT III : Distribution level mains, fixed installation.

CAT II : Local level mains, appliances, portable equipment

Over voltage category

CAT I : Signal level, special equipment or parts of equipment,

telecommunication, electronics.

Pollution Degree 2 Do not operate in environments where conductive

Pollutants may be present.

Basic Maintenance

WARNING

To avoid shock, disconnect test leads from any voltage source than remove from meter before

opening the case or replacing the battery.

Opening the Meter Case

CAUTION

To avoid unintentional shock circuit, always place the uncovered Meter assembly on a protective

surface. When the case of the Meter is open, circuit connections are exposed.

To open the Meter case, do the following:

1. Disconnect test leads from any voltage source than remove

2. Remove the battery door by using a flat-blade screwdriver

to turn the battery door screw counter-clockwise.

3. The battery door is secured to the case top by one screw.

Using a Phillips-head screwdriver, remove the screw.

Replacing the Battery

The meter is powered by 2 AA 1.5V batteries.

To replace the battery refer to figure.

from meter before opening the case.

Performance Tests

The following performance tests verify the complete operability of the Meter and check the

accuracy of each Meter function against the Meter’s specifications.

Accuracy specifications are valid for a period of one year after calibration, when measured at an

operating temperature of 18°C to 28°C and a maximum of 80% relative humidity.

To perform the following tests, it is not necessary to open the case, no adjustments are

necessary, merely make the required connections, apply the designated inputs, determine if the

reading on the Meter display falls within the acceptable range indicated.

If the Meter fails any of these tests, it needs calibration adjustment or repair.

Testing the Display

Press “HOLD” key while turning the Meter on from the “OFF” position to hold the display in the

Display Test Mode. Compare the display with the example in Figure 2. Turn off the meter to

escape the test mode.

LCD Graphics 2236-20

Figure 2 Display Test

FIG. PART NO. DESCRIPTION OF PART NO. REQ.

1 31-50-1220 Top Case (1)

2 30-55-0015 Left and Right Jaw Set (1)

3 05-78-0140 N3 x 12 Philips Hd. Self-Tapping Scr. (1)

4 05-78-0145 N2.3 x 8 Philips Hd. Self-Tapping Scr. (1)

5 05-81-0290 N2.3 x 8 BTP Philips Hd. Screw (3)

6 05-78-0150 N2.3 x 5 BTP Philips Hd. Screw (2)

7 42-42-0930 Keypad (1)

9 31-50-1225 Bottom Case (1)

10 05-81-0285 N3 x 12 Philips Hd. Self-Tapping Scr. (1)

11 05-81-0155 N3 x 16 Philips Hd. Self-Tapping Scr. (1)

12 42-42-0910 Hold Button (1)

13 42-42-0920 Flashlight Button (1)

14 31-21-0040 Battery Door (1)

15 05-81-0280 Battery Door Screw (1)

17 23-74-0135 Input Terminals (Red) (1)

18 23-74-0145 Input Terminals (Black) (1)

19 22-58-0025 Input Block (1)

21 --------------- Slotted Flat Head Jaw Axle (1)

FIG. PART NO. DESCRIPTION OF PART NO. REQ.

8 22-06-0150 Main PCBA (1)

1. Component Layout and Spare Parts List

19 18 17 11

13 10 12

7 5 6

21 3 4

3 4

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