Milwaukee 2236-20 Operating instructions

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

i
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

1
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.
++

2
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.

3
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
noitpircseDscitsiretcarahC
stnuoc0006tnuocyalpsiD
ces/semit3etaretadpuciremuN
citamotuAyalpsidytiraloP
Overrange display Display "OL" when the reading exceeds
range by 10%
Low voltage indicator is indicated
setunim02emitffo-rewopcitamotuA
ezisAAro6RLCEI2*V5.1ecruosrewoP
Maximum input voltage 600V CAT lll between V and COM
Maximum floating voltage
600V CAT lll between any terminal and earth
ground
V connector V, V, , ,
C°82>roC°81<,C°/)ycaruccA.cepS(×1.0tneiciffeoCerutarepmeT
)enilaklA(lacipytsruoh30efiLyrettaB
++

4
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

5
(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)

6
Physical and Environmental Characteristics
noitpircseDscitsiretcarahclatnemnorivnE
C°05+ot01-gnitarepoerutarepmeT
C°06+ot04-gnitarepO-noN
.H.R%08<)gnitarepo(ytidimuH
).tf0656(M000,2gnitarepOedutitlA
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.

7
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

8
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
15
1
5
8
7 5 6
21 3 4
15
14
9
3 4
21
2