Hioki 3237 User manual
Contents
3237A981-14
Introduction i
Inspection i
Safety Notes ii
Notes on Use v
Chapter Summary vi
Chapter 1 Overview 1
1.1 Product Overview 1
1.2 Major Features 1
1.3 Names and Functions of Parts 2
1.3.1 Front Panel 2
1.3.2 Rear Panel 6
Chapter 2 Installation and Preparation 7
2.1 Power Supply and Ground Connection 7
2.2 Test Lead/Clamp Sensor Connection 8
2.3 Power On/Off 10
2.4 Selection of Power-supply Frequency 10
Chapter 3 Measurement Procedure 11
3.1 Voltage Measurement 12
3.1.1 DC Voltage Measurement 12
3.1.2 AC Voltage Measurement 12
3.2 2-Terminal Resistance Measurement 13
3.2.1 Resistance Measurement (2-Terminal) 13
3.2.2 Low-power Resistance Measurement (2-Terminal) 14
3.3 4-Terminal Resistance Measurement 15
3.3.1 Resistance Measurement (4-Terminal, on 3239 only) 15
3.3.2 Low-power Resistance Measurement
(4-Terminal, on 3239 only) 16
3.4 Continuity Test 16
3.5 Diode Test 17
3.6 Frequency Measurement (3238/39) 18
3.7 Current Measurement (3238/39) 19
3.7.1 DC Current Measurement 19
3.7.2 AC Current Measurement 19
3.8 Clamp Current Measurement 20
3.8.1 DC Clamp Current Measurement
(9277/9278/9279/3284/3285) 21
3.8.2 AC Clamp Current Measurement 22
Chapter 4 Basic Functions 23
4.1 Selection of Measurement Range 23
4.2 Switching of Sampling Period 23
4.3 Zero Adjust function 24
4.4 Average function 25
4.5 Trigger Function 26
4.5.1 Setup for Trigger mode 26
4.5.2 External Trigger 26
4.5.3 Trigger Delay 27
4.5.4 Trigger System 29
Chapter 5 Other Functions 31
5.1 Comparator Function 31
5.2 Comparator Buzzer Sound 34
5.3 Panel Save Function 35
5.4 Panel Load Function 36
5.5 Key Operation Sound 37
5.6 Key Lock Function 38
5.7 Remote Function 39
5.8 System Reset 40
5.9 Measurement States and Effective Keys 42
Chapter 6 External Control Terminal/
External output terminal 43
6.1 Explanation of Signal Wires 44
6.2 Timing Chart 46
6.3 Internal Circuit Configuration 48
Chapter 7 RS-232C Interface 49
7.1 Preparing for Data Transfer 51
7.2 Communication 53
7.3 Command Code Table 62
7.3.1 Common Command 62
7.3.2 Specific Command 63
7.4 Command Reference 69
7.4.1 Explanation of Command Reference 69
7.4.2 Common Command Messages 70
7.4.3 Specific Command Messages 75
7.5 Initialized Item List 99
7.6 Notes on RS-232C Interface 99
7.7 Compatibility with the ADVANTEST Digital
Multimeter 100
7.8 Sample Program 102
Chapter 8 GP-IB Interface(3237-01/3238-01/3239-01) 103
8.1 Preparing for Data Transfer 105
8.2 Communication 107
8.3 GP-IB Command 116
8.4 Notes of the GP-IB 117
Chapter 9 Printer Interface 119
9.1 Setup for Interface 120
9.2 Setup for Printer 121
9.3 Printer Connection Method 123
9.4 Sample Prints 124
Chapter 10 Specifications 125
10.1 General Specifications 125
10.2 Accuracy 127
10.2.1 Accuracy of the 3237 127
10.2.2 Accuracy of the 3238 133
10.2.3 Accuracy of the 3239 140
Chapter 11 Maintenance and Service 147
11.1 A-Terminal Fuse Replacement (3238/39) 147
11.2 Power Supply Fuse Replacement 148
11.3 Cleaning 149
11.4 Service 150
Appendix APPENDIX1
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NOTE Before using the product, make sure that the insulation on the probes is undamaged
and that no bare conductors are improperly exposed. Using the product in such
conditions could cause an electric shock, so contact your dealer or Hioki
re
p
resentative for re
p
air.
Introduction
Inspection
Thank you for purchasing the HIOKI "3237, 3238, 3239 DIGITAL
HiTESTER."
To obtain maximum performance from the product, please read this manual
first, and keep it handy for future reference.
When you receive the product, inspect it carefully to ensure that no damage
occurred during shipping. In particular, check the accessories, panel
switches, and connectors. If damage is evident, or if it fails to operate
according to the specifications, contact your dealer or Hioki representative.
Accessories
L9170-10 TEST LEAD 1
Instruction Manual 1
Power cord 1
Spare fuse 0.5 A (for 100 V, 120 V), 0.25 A (for 220 V, 240 V)
2 A (for the 3238/39) 1
Before using the product the first time, verify that it operates normally to
ensure that the no damage occurred during storage or shipping. If you find
any damage, contact your dealer or Hioki representative.
Inspection before use
When measuring a dangerous voltage or current, or when a measurement of
high reliability is required, always carry out the following confirmation
before using.
No damage to the power cord, test lead and the produt itself
No inaccurate measurement values are shown when connected to a
measurement target with clear values (non-defective sample, calibrator,
etc.) and under the setting for the test conditions used by the customer
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WARNING
This instrument is designed to comply with IEC 61010 Safety Standards,
and has been thoroughly tested for safety prior to shipment. However,
mishandling during use could result in injury or death, as well as
damage to the instrument. Be certain that you understand the
instructions and precautions in the manual before use. We disclaim any
responsibility for accidents or injuries not resulting directly from
instrument defects.
The symbol printed on the product indicates that the user should
refer to a corresponding topic in the manual (marked with the
symbol) before using the relevant function.
In the manual, the symbol indicates particularly important
information that the user should read before using the product.
Indicates that dangerous voltage may be present at this terminal.
Indicates a double-insulated device.
Indicates a fuse.
Indicates AC (Alternating Current).
Indicates DC (Direct Current).
Indicates both DC (Direct Current) and AC (Alternating Current).
Indicates a grounding terminal.
Indicates the ON side of the power switch.
Indicates the OFF side of the power switch.
DANGER
Indicates that incorrect operation presents an extreme hazard that
could result in serious injury or death to the user.
WARNING
Indicates that incorrect operation presents a significant hazard that
could result in serious injury or death to the user.
CAUTION Indicates that incorrect operation presents a possibility of injury to
the user or damage to the product.
NOTE Advisory items related to performance or correct operation of the
product.
Safety Notes
This manual contains information and warnings essential for safe operation
of the product and for maintaining it in safe operating condition. Before
using the product, be sure to carefully read the following safety notes.
The following symbols in this manual indicate the relative importance of
cautions and warnings.
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CAT II Primary electrical circuits in equipment connected to
a wall outlet via a power cord (portable tools,
household appliances, etc.)
CAT II covers directly measuring electrical outlet
receptacles.
CAT III Primary electrical circuits of heavy equipment (fixed
installations) connected directly to the distribution
panel, and feeders between the distribution panel
and outlets.
CAT IV The circuit from the service drop to the service
entrance, then to the power meter and to the primary
overcurrent protection device (distribution panel).
Measurement categories
This product complies with CAT II safety requirements.
To ensure safe operation of measurement product, IEC 61010 establishes
safety standards for various electrical environments, categorized as CAT II to
CAT IV, and called measurement categories.
Using a measurement product in an environment designated with a higher-
numbered category than that for which the product is rated could result in
a severe accident, and must be carefully avoided.
Use of a measurement instrument that is not CAT-rated in CAT II to CAT
IV measurement applications could result in a severe accident, and must be
carefully avoided.
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f.s. (maximum display or scale value, or length of scale)
Signifies the maximum display (scale) value or the length of the scale
(in cases where the scale consists of unequal increments or where the
maximum value cannot be defined).
In general, this is the range value (the value written on the range
selector or equivalent) currently in use.
rdg. (displayed or indicated value)
This signifies the value actually being measured, i.e., the value that is
currently indicated or displayed by the measuring instrument.
dgt. (resolution)
Signifies the smallest display unit on a digital measuring instrument,
i.e., the value displayed when the last digit on the digital display is
"1".
Accuracy
The specifications in this manual include figures for "measurement accuracy"
when referring to digital measuring instruments, and for "measurement
tolerance" when referring to analog instruments.
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WARNING
To avoid electric shock, do not allow the product to get wet, and do
not use it when your hands are wet.
Do not use the product where it may be exposed to corrosive or
combustible gases. The product may be damaged or cause an
explosion.
To avoid electric shock, be sure to connect the protective ground
terminal to a grounded conductor.
CAUTION Do not store or use the product where it could be exposed to direct
sunlight, high temperature or humidity, or condensation. Under such
conditions, the product may be damaged and insulation may deteriorate so
that it no longer meets specifications.
This product is not designed to be entirely water- or dust-proof. To avoid
damage, do not use it in a wet or dusty environment.
Do not use the product near a device that generates a strong
electromagnetic field or electrostatic charge, as these may cause
erroneous measurements.
To avoid damage to the product, protect it from vibration or shock during
transport and handling, and be especially careful to avoid dropping.
Notes on Use
In order to ensure safe operation and to obtain maximum performance from
the unit, observe the cautions listed below.
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Chapter Summary
Chapter 1 Overviews
Provides a product overview and gives the names and describes the functions
of the component parts.
Chapter 2 Installation and Preparation
Describes ways to turn on power, connect test leads, and set up the power-
supply frequency.
Chapter 3 Measurement Procedure
Describes basic measurements.
Chapter 4 Basic Functions
Describes basic functions such as range setup, sampling setup, and so on.
Chapter 5 Other Functions
Describes other functions, including comparator setup, Load Save function,
and so on.
Chapter 6 External Control Terminal/ External output terminal
Describes external control executed via the external control terminal and
external output terminal.
Chapter 7 RS-232C Interface
Describes external control executed via the RS-232C interface.
Chapter 8 GP-IB Interface
Describes external control executed via the GP-IB interface.
Chapter 9 Printer Interface
Describes output to the optional 9442 PRINTER.
Chapter 10 Specifications
Describes measurement methods designed to achieve maximum performance
from the unit.
Chapter 11 Maintenance and Service
Describes general specifications and measurement ranges.
Appendix
Describes services and options for this unit.
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1.2 Major Features
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A
Chapter 1
Overview
1.1 Product Overview
1.2 Major Features
In addition to measuring functions for DC voltages, AC voltages, resistances,
DC currents*, AC currents*, and frequencies*, the 3237/38/39 Digital High
Tester comes with a comparator function that is especially useful for line
use. The GP-IB interface (3237-01/3238-01/3239-01), RS-232C interface,
and the units comparator output permits use of the unit across a wide range
of applications, such as parts selection and data acquisition.
*: On the 3238/39.
(1) High-speed measurement and fast OK/NG determination
Allows reduced tact time for the line in high-speed measurements and fast
OK/NG determinations. Thirty different setup conditions for the main unit
can be saved, including comparator conditions. This makes it possible to
determine OK or NG for many sample types being measured with a single
unit.
(2) Low-power resistance measurement
The unit enables low-power resistance measurement, with low measurement
current and open voltage, to minimize the potential for degraded sample
characteristics.
(3) A versatile array of interfaces
The unit comes equipped with a GP-IB interface (3237-01/3238-01/3239-01),
RS-232C interface, external output terminal, and external control terminal.
Through these interfaces, data can be exchanged with a computer or
sequencer.
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1.3 Names and Functions of Parts
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1.3.1 Front Panel
3237
Power switch
COM
terminal
VΩ
CLAMP
terminal
Operation keys
LED
Display
3238
Power swtich
COM
terminal
VΩ
CLAMP
terminal
Operation keys
A-terminal
3239
COM
terminal
VΩ
CLAMP
terminal
Operation keys
A-terminal
SENSE terminal
LED
Display
LED
Display
Power swtich
1.3 Names and Functions of Parts
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1.3 Names and Functions of Parts
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A
Operation keys
VSelects the DC voltage measurement function.
VSelects the AC voltage measurement function.
ΩSelects the 2-terminal resistance measurement function.
LPΩSelects the low-power 2-terminal resistance measurement
function.
Selects the continuity test function.
SHIFT +
Selects the diode test function.
Hz Selects the frequency measurement function. (3238/39)
ASelects the DC current measurement function. (3238/39)
ASelects the AC current measurement function. (3238/39)
COMP Turns the comparator ON or OFF.
M.TRIG Applies a manual trigger.
LOAD Recalls saved information.
SAVE Saves the current status.
LOCAL Clears the remote status.
SMPL Switches the sampling period.
SHIFT Pressed before shift operation.
ENT Confirms a setting.
AUTO Selects Auto Range.
Used to move the cursor indicated by flashing numbers or
characters on a setup screen.
Used to increment or decrement the currently flashing value.
These buttons are also used to edit character strings in
various setup screens, and to switch ranges when a
measurement is performed.
SHIFT +COMP
Turns the comparator buzzer ON or OFF.
INT.TRIG
SHIFT +M.TRIG
Applies an internal trigger.
0ADJ
SHIFT +LOAD
Subtracts the offset of a measurement value.
LOCK
SHIFT +LOCAL
Locks the keys.
AVE
SHIFT +SMPL
Sets the mean of the measurement values.
CLAMP
SHIFT +V
Selects the DC current measurement function that uses the
clamp sensor.
CLAMP
SHIFT +V
Selects the AC current measurement function that uses the
clamp sensor.
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1.3 Names and Functions of Parts
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Operation keys
4WΩ
SHIFT +Ω
Selects the 4-terminal resistance measurement function.
(3239 only)
4WΩ
SHIFT +LPΩ
Selects the low-power 4-terminal resistance measurement
function. (3239 only)
MENU
SHIFT +ENT
Displays the menu screen for selection of the clamp sensor,
interfaces, power-supply frequency, etc.
Terminals
COM The test lead (black) is connected here for various
measurements.
VΩ
CLAMP The test lead (red) is connected here to measure voltages,
resistances, frequencies, diodes, or clamp currents, or to
conduct a continuity test.
AThe test lead (red) is connected here to measure currents.
(3238/39)
SENSE The test lead (SENSE) is connected here to measure
resistance (4-terminal resistance measurement). (3239)
Switch
POWER Turns the power ON ( )orOFF( ).
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1.3 Names and Functions of Parts
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A
FUNCTION
STATUS
COMP
LED display
FUNCTION
LP Lights up when a low-power resistance measurement is performed.
Lights up when a DC measurement is performed.
CLAMP Lights up when a current measurement is performed using the clamp
sensor.
Lights up when a AC measurement is performed.
Lights up when a diode test is conducted.
Lights up when a continuity test is conducted.
4W Lights up when a 4-terminal resistance measurement is performed. (3239)
2W Lights up when a 2-terminal resistance measurement is performed. (3239)
STATUS
0ADJ Lights up when a measurement is in progress with the Zero Adjust
function activated.
M.TRIG Lights up when Manual Trigger is selected.
AUTO Lights up when Auto Range is selected.
COMP Lights up when the comparator is in use.
SET Lights up together with COMP when a comparator threshold is set.
FAST Lights up when FAST is selected for the sampling period.
MED Lights up when MEDIUM is selected for the sampling period.
SLOW Lights up when SLOW is selected for the sampling period.
Lights up when the comparator buzzer is turned ON.
AVE Lights up when the Average function is in use.
LOCK Lights up when the Key Lock is active.
RMT Lights up when remote control is underway through the RS-232C or GP-
IB interface.
SHIFT Lights up when SHIFT is pressed.
COMP
Hi
IN
Lo
Displays the comparator result.
Hi : Lights up if the measurement value exceeds the upper-limit value.
IN : Lights up if the measurement value remains between the upper-
limit and lower-limit values.
Lo : Lights up if the measurement value is smaller than the lower-limit
value.
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1.3 Names and Functions of Parts
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1.3.2 Rear Panel
3237
3238
3239
3237-01
3238-01
3239-01
Inlet
GP-IB interface
RS-232C interface External I/O
Inlet
RS-232C interface External I/O
Stand
Stande
Power/fuse ratings
Power/fuse ratings
Inlet The power cord is connected here.
GP-IB interface The GP-IB interface is connected here.
RS-232C interface The RS-232C interface is connected here.
ExternalI/O This is an external output terminal/external control terminal.
Power/fuse ratings Indicates the power ratings and the fuse currently in use.
NOTE Be sure not to bear down too hard on the top of the product when it is tilted
upwards. Doing so may damage the stand.
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2.1 Power Supply and Ground Connection
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A
WARNING
Before turning the product on, make sure the source voltage matches
that indicated on the product's power connector. Connection to an
improper supply voltage may damage the product and present an
electrical hazard.
To avoid electrical accidents and to maintain the safety specifications
of this instrument, connect the power cord provided only to a 3-
contact (two-conductor + ground) outlet.
Chapter 2
Installation and Preparation
2.1 Power Supply and Ground Connection
1. Confirm the power switch is OFF.
2. Make sure the source voltage matches that indicated on the product's
power connector and connect the power cord supplied to AC inlet on the
rear panel.
3. Plug in the power cord. Insert the plug directly into the outlet.
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2.2 Test Lead/Clamp Sensor Connection
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WARNING
The terminals do not have sufficient spatial isolation. To avoid
electrocution, observe the following precautions.
Connect test leads to the terminals only after shutting off the line
power.
Note that hazardous voltage may be present at the V Ω
CLAMP terminal when using the A-terminal. Be careful to avoid
touching the V ΩCLAMP terminal and SENSE terminal.
Note that hazardous voltage may be present at the A-terminal when
using the V ΩCLAMP terminal and SENSE terminal. Be
careful to avoid touching the A-terminal.
When connecting the clamp-on sensor, should the metallic part of the
sensor, exposed while the clamp is open, touch the two wires of the
line, or if the sensor is used on a bare conductor, may result in a short
circuit or electrocution.
Although CAT III, CAT IV are stated on the L9170-10 TEST LEAD, the
DIGITAL HiTESTER is only compatible with CAT I and CAT II.
To avoid electrocution, do not measure the lines of CAT III or CAT IV.
CAUTION To prevent an electric shock accident, confirm that the white or red portion
(insulation layer) inside the cable is not exposed. If a color inside the cable is
exposed, do not use the cable.
NOTE Removable sleeves are attached to the metal pins at the ends of the test leads. The
test leads can also be used with the sleeves removed.
CAUTION The tips of the metal pins are sharp, so take care not to injure yourself.
2.2 Test Lead/Clamp Sensor Connection
Removing and attaching the sleeves
Removing the sleeves
Gently hold the bottom of the sleeves and pull the sleeves off.
Safely store the removed sleeves so as not to lose them.
Attaching the sleeves
Insert the metal pins of the test leads into the holes of the sleeves, and firmly
push them all the way in.
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11
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