Quadtech 1865 User Manual

1865 Megohmmeter/IR Tester

Instruction Manual

Form 150073/D4

QuadTech, Inc., 1992

5 Clock Tower Place, 210 East

Maynard, Massachusetts, U.S.A. 01754

September, 2003

Telephone [phone]
Sales 800-253-1230
Facsimile 978-461-4295

Website www.quadtech.com

The material in this manual is for informational purposes only and is subject to change, without
notice. QuadTech assumes no responsibility for any error or for consequential damages that may
result from the misinterpretation of any procedures in this publication.

WARNING

Potentially dangerous voltages may be present on front and rear panel terminals. Follow all

warnings in this manual when operating or servicing this instrument. Dangerous energy levels

may be stored in capacitors tested by this unit. Always make sure the high voltage indicator is

not on when connecting or disconnecting the unknown.

!

Product will be marked with this symbol (ISO#3684) when it is necessary for the user to

refer to the instruction manual in order to prevent injury or equipment damage.

Product marked with this symbol (IEC417) indicates presence of direct current.

Product will be marked with this symbol (ISO#3684) when voltages in excess of 1000V

are present.

Page 2 of 87

Contents

Warranty ............................................................................................................7

Specifications ............................................................................................................9

Accessories ............................................................................................................11

Safety Precautions ...................................................................................................13

Condensed Operating Instructions ........................................................................15

Introduction - Section 1

1.1 Unpacking and Inspection..............................................................................21

1.2 Product Overview ..........................................................................................21

1.3 Controls and Indicators..................................................................................22

1.3.1 Front Panel Controls and Indicators ..................................................22

1.3.2 Rear Panel Controls and Connectors ................................................24

1.4 Installation......................................................................................................25

1.4.1 Dimensions ........................................................................................25

1.4.2 Instrument Positioning.......................................................................25

1.4.3 Power Requirements..........................................................................25

1.4.4 Safety Inspection................................................................................27

Operation - Section 2

2.1 Terms and Conventions .................................................................................29

2.2 Startup ............................................................................................................29

2.3 Zeroing...........................................................................................................30

2.4 Connection to Device Under Test..................................................................30

2.5 Measurement Procedure.................................................................................32

2.5.1 General...............................................................................................32

2.5.2 Default Measurement Conditions......................................................33

2.5.3 Automatic Measurement Mode..........................................................34

2.5.4 Manual Measurement Mode ..............................................................36

2.6 Menu Functions .............................................................................................36

2.6.1 General...............................................................................................36

2.6.2 Setup Menu........................................................................................37

2.6.2.1 Voltage..................................................................................37

2.6.2.2 Charge Time..........................................................................38

2.6.2.3 Dwell Time ...........................................................................38

2.6.2.4 Measure Time .......................................................................38

2.6.2.5 Discharge Time.....................................................................39

2.6.2.6 Mode.....................................................................................39

2.6.2.7 Range ....................................................................................40

2.6.2.8 Limit......................................................................................43

2.6.2.9 Stop on Pass..........................................................................44

2.6.2.10 # to Average........................................................................44

Page 3 of 87

Contents (Continued)

Operation - Section 2 (Continued)

2.6.3 I/O Menu............................................................................................45

2.6.3.1 Display Type.........................................................................45

2.6.3.2 Result Format........................................................................46

2.6.3.3 RS-232 ..................................................................................47

2.6.3.4 IEEE-488...............................................................................48

2.6.3.5 Handler..................................................................................48

2.6.3.6 Results to Floppy ..................................................................48

2.6.4 Utilities Menu ....................................................................................50

2.6.4.1 Save Setup.............................................................................51

2.6.4.2 Recall Setup..........................................................................53

2.6.4.3 Zero.......................................................................................54

2.6.4.4 Lock Out ...............................................................................55

2.6.4.5 Calibration.............................................................................55

2.6.4.6 Set Time/Date .......................................................................56

2.6.4.7 Elapsed Time ........................................................................57

2.6.4.8 Calibration Date....................................................................57

2.6.4.9 Set Contrast...........................................................................58

2.6.4.10 LCD Backlite......................................................................58

2.7 Input/Output Interface....................................................................................58

2.7.1 I/O Interface.......................................................................................58

2.7.2 IEEE-488 Interface.............................................................................60

2.7.3 Sample Program for National Instruments GPIB Card......................65

2.7.4 Sample Program for IO Tech GPIB Card ..........................................66

2.7.5 RS232 Interface..................................................................................67

2.7.6 Sample Program for RS232...............................................................68

2.7.7 Results to Printer................................................................................69

2.8 Error Messages...............................................................................................70

Applications - Section 3

3.1 Insulation Resistance Testing.........................................................................73

3.2 Test Sample Resistivity Measurements.........................................................74

3.3 Capacitor Insulation Resistance.....................................................................74

3.3.1 General...............................................................................................74

3.3.2 Charge Time Constant .......................................................................75

3.3.3 Discharge Time..................................................................................76

3.4 Resistance Measurements..............................................................................76

3.5 Measurement of Voltage Coefficient.............................................................76

3.6 Guarded, 3 Terminal Measurements..............................................................77

Page 4 of 87

Contents (Continued)

Theory Section 4

4.1 General...........................................................................................................79

4.2 Instrument Description...................................................................................79

4.2.1 Basic I2000 Instrument Architecture .................................................79

4.2.2 1865 Instrument Modules..................................................................80

4.2.3 I2000 Instrument Options..................................................................81

Maintenance/Calibration - Section 5

5.1 General...........................................................................................................83

5.2 Instrument Return ..........................................................................................83

5.3 Routine Maintenance.....................................................................................83

5.3.1 Battery Replacement..........................................................................84

5.3.2 Resetting of Time and Date ...............................................................85

5.3.3 Loss of Display Contrast....................................................................85

5.3.4 Preventive Maintenance/Cleaning .....................................................86

5.4 Calibration......................................................................................................86

5.4.1 General...............................................................................................86

5.4.2 Calibration Procedure ........................................................................86

Page 5 of 87

Page 6 of 87

Warranty

echuad

!

QuadTech warrants that Products are free from defects in material and workmanship and,
when properly used, will perform in accordance with QuadTech's applicable published
specifications. If within one (1) year after original shipment it is found not to meet this
standard, it will be repaired, or at the option of QuadTech, replaced at no charge when
returned to a QuadTech service facility.

Changes in the Product not approved by QuadTech shall void this warranty.

QuadTech shall not be liable for any indirect, special or consequential damages,
even if notice has been given of the possibility of such damages.

This warranty is in lieu of all other warranties, expressed or implied, including, but
not limited to any implied warranty or merchantability or fitness for a particular
purpose.

SERVICE POLICY

QuadTech’s service policy is to maintain product repair capability for a period of at least

five (5) years after original shipment and to make this capability available at the then

prevailing schedule of charges.

Page 7 of 87

Page 8 of 87

Specifications

Resistance Range: 1 x103 to > 1x1014 Ω(dependent on test voltage)

1x106 - >1x10
1x105 - 1x1013 Ω at 100VDC
1x104 - 1x1012 Ω at 10VDC
1x103 - 1x1011 Ω at 1VDC

(7 ranges or auto ranging)
Resistance Accuracy:* ±[0.45% +{(Rx/Vx)(0.0005 FS + 2pA) + 30Ω/Rx}100%]

Rx: Measured resistance in ohms
Vx: Programmed voltage in volts
FS: Full scale current range in amperes

Voltage Range: 1 to 1000, Volts programmable in two ranges

Voltage Accuracy:* 1 - 100V: 1% of setting +1V

25mV resolution
100 - 1000V: 1% of setting +2V
250mV resolution

Output Voltage
Impedance: 1 kΩ ± 5%

Current Limited: < 2mA

Current Measure: 1x10

-13

Current Accuracy:* 1nA to 1mA: ±[0.5% + (0.0005FS + 2pA)]
100pA to 1nA: ±[1% + (0.0005FS + 2pA)]
1pA to 100pA: ±[10% + (0.0005FS + 2pA)]

Input Impedance: 5 kΩ ± 5%

Measure Limits: Pass/Fail (1 limit)

Display: LCD graphic display

Voltage warning indicator
Pass/Fail indicator

* specified at front panel connectors

14 Ω

to 1x10

at 1000VDC

-3

amps

Page 9 of 87

Specifications (Continued)

Test Cycle: Manual: Charge, Measure, Discharge

Automatic: Charge time: 0 -300 sec Dwell time: 0 - 300 sec Measure time: 0 - 300 sec (0 – 999 on later units) Discharge time: 0 - 300 sec

I/O Interface: Standard -RS232
I/O Port (w/safety interlock)
Optional -1865-01 - IEEE-488, factory installed at unit purchase
1865-02 - Floppy Drive, 3.5", factory installed only
1865-03 - Rear panel input terminals, factory installed at purchase
1865-70 - IEEE-488, field retrofit

Input Terminals: Four sheathed banana plugs, front or rear mount (optional)
+ unknown (red) - unknown (black)
guard (blue) ground (green)

Dimensions: Bench with tilt back bail
(133.4mm high x 444.5mm wide x 406.4mm deep)
(5 1/4" x 17 1/2" x 16")

Weight: Approximately 8.2 kg (18 lbs) - Net
Approximately 11.8 kg (26 lbs) - Shipping

Environmental: MIL-T-28800D, Type 3, Class 5, Style E & F
Operating: 0°C to 50°C, stated accuracy <45% RH
Storage: -40°C to 71°C
Altitude: <2000m, Installation Category 1, Pollution Degree 1

Power: • 90 - 250V • 47 - 63Hz • 40W max

General: • Fully programmable via menu

• Zeroing

• Stored test conditions and results

• Selected measurement units (engineering or scientific)

Accessories • Instruction Manual • AC Power Cable
Supplied: • Calibration Certificate • 1 MΩ and 100 kΩ Capacitor Adapters

• Interlock Connector

Accessories • 1865-50 Rack Mount Kit • 1865-51 Shielded Lead Set
Available: • 1865-52 Component Test Fixture

Page 10 of 87

Accessories

Accessories Included

Item Quantity QuadTech P/N

U.S. AC Power Cable (3-prong) 1 4200-0300
T2.5A 250V 5X20mm Line Fuse 1 520049
1MΩ Capacitor Adaptor 1 800015
100kΩ Capacitor Adaptor 1 800014
Interlock Connector 1 630019
Instruction Manual 1 150073
Calibration Certificate 1 N/A

Accessories/Options Available

Item Quantity QuadTech P/N

IEEE-488 Interface (factory installed) 1 1865-01

3.5” Floppy Drive Option (factory installed) 1 1865-02
Rear Panel Input Option (factory installed) 1 1865-03
Rack Mount Kit 1 1865-50
Shielded Lead Set 1 1865-51
Component Test Fixture 1 1865-52
IEEE-488 Interface (Field Retro-Fit Option) 1 1865-70

Page 11 of 87

Page 12 of 87

Safety Precautions

The 1865 Megohmmeter/IR Tester can provide an output voltage as high as 1000VDC to the external

device under test (DUT).

Although the 1865 unit is designed with full attention to operator safety, serious hazards could occur

if the instrument is used improperly and these safety instructions are not followed.

1. The 1865 unit is designed to be operated with its chassis connected to earth
ground. The 1865 instrument is shipped with a three-prong power cord to provide
this connection to ground. The power cord should only be plugged in to a
receptacle that provides earth ground. Serious injury can result if the Sentry unit
is not connected to earth ground.

2. Tightly connect cable(s) to the (green) GND terminal. If this is not done, the
DUT’s casing can be charged to the high voltage test level and serious injury or
electrical shock hazards could result if the DUT is touched.

3. Never touch the metal of the High Voltage probe directly. Touch only the
insulated parts of the lead(s).

4. Never touch the test leads, test fixture or DUT in any manner (this includes
insulation on all wires and clips) when the high voltage is applied and the red

CAUTION HIGH VOLTAGE LED is lit.

5. Before turning on the 1865 unit, make sure the AC power cord is plugged into
the proper voltage source and that there is no device (DUT) or fixture connected
to the test leads.

6. After each test, press the [STOP] (red) button for safety. This terminates the high
voltage being applied to the output terminals.

7. When the CAUTION HIGH VOLTAGE LED is lit NEVER touch the device
under test, the lead wires or the output terminals.

8. Before touching the test lead wires or output terminals make sure:

a) The red [STOP] button has been pressed.
b) The CAUTION HIGH VOLTAGE LED is OFF.
c) The output voltage display is 0 (zero).

9. In the case of an emergency, turn OFF the [POWER] switch using a“hot stick”
and disconnect the AC power cord from the wall. DO NOT TOUCH THE 1865
INSTRUMENT.

10. If the CAUTION HIGH VOLTAGE LED does not go off when the [STOP]
button is pressed, immediately stop using the tester. It is possible that the output
voltage is still being delivered regardless of the TEST ON/OFF control signal.

11. When the 1865 instrument is used in remote control mode, be extremely careful.
The High Voltage Output is being turned on and off with an external signal.

Page 13 of 87

Page 14 of 87

Condensed Operating Instructions

WARNING

High voltage is applied to the measurement terminals of the 1865 any time the

CAUTION HIGH VOLTAGE LED is ON. While the current from the instrument is

limited, the energy stored in a capacitive device connected to the terminals may be lethal.

Always make sure the high voltage indicator is OFF when connecting or disconnecting

the unknown. A flashing CAUTION HIGH VOLTAGE light and/or DANGER on the

display indicates a defective unit with dangerously high voltages possible at the input

terminals. Power the unit down and do not use.

General Information

The 1865 Megohmmeter/IR Tester is a computer controlled measuring instrument for
direct readout of resistance and current. The voltage applied to the device under test
(DUT) is programmable from 1 to 1000 volts. A pass/fail indicator provides a visual
display of test results based on a preset limit. A set of power-up default test conditions
are stored in the unit and are as set by the factory (1V, test times zero) until
reprogrammed by the user.

Start-up

The 1865 can be operated from a power source between 90V and 250V AC at a power
line frequency of 47 to 63 Hz. The standard 1865 is shipped from the factory with a 2.5A
fuse in place for 115V or 220V operation. To change the fuse refer to paragraph 1.4.3.

Connect the instrument power cord to the source of proper voltage.

IMPORTANT

The interlock connector (included with the unit) needs to be installed on the rear

panel I/O Port connector if the interlock function is not being used. When the

3.5" Floppy Drive Option is present ALWAYS MAKE SURE NO DISKS ARE

INSTALLED WHEN THE UNIT IS POWERED UP, otherwise information stored

on the disks could be lost.

Press the [POWER] button on the front panel to apply power. To switch power off press
the [POWER] but ton again or if measurements are to be made proceed with Zeroing the
instrument, discussed in the next paragraph.

Page 15 of 87

Condensed Operating Instructions

Zeroing

Before measuring, zero out test lead or fixture measurement errors as follows.

1. If test leads are to be used connect them to the 1865 input terminals, red to +

unknown, black to - unknown, with probes open and spaced some distance apart (or
fixture open).

2. Press [MENU] key to select menu display.

3. Press Right or Left Arrow key to select Utilities menu.

4. Press Up or Down Arrow key to select Zero in the sub menu.

5. Press [ENTER] key to activate the Zero routine and follow instructions on the

instrument display.

Auto Measurement Mode

In automatic mode, once the [START] button is depressed the instrument sequences
automatically through the test cycle phases, charge, dwell, measure and discharge and a
pre-stored set of test conditions are executed. These test conditions can be DEFAULT
(those at power up), set using menus or the operator can recall a previously stored setup.

1. Connect the device under test to the 1865 test leads or other fixture being used.

2. If the desired setup conditions are anything other than DEFAULT, set using menus

or proceed to Recalling Setups below before continuing with step 3.

3. Initiate the auto measurement mode by pressing [START]. The High Voltage

Indicator will remain on as the unit sequences automatically through all four phases
(charge, dwell, measure, discharge) of the test cycle.

4. The measurement can be aborted at any time during the test cycle by pressing

[STOP].

5. Once the High Voltage Indicator goes off the measurement is complete, the final

result remains displayed and the device can be removed.

Page 16 of 87

Condensed Operating Instructions

Manual Measurement Mode

In manual measurement mode each phase of a test cycle, charge, measure and discharge is
initiated manually at the users discretion. These test conditions can be DEFAULT (those
at power up), set using menus or the operator can recall a previously stored setup.

1. Connect the device under test to the 1865 test leads or other fixture being used.

2. Press [MENU] key to select menu display.

3. Press Right or Left Arrow key to select Setup menu.

4. Press Up or Down Arrow key to select Mode in the sub menu.

5. Press [ENTER] to activate the selection field.

6. Press Right or Left Arrow key to select Manual and press [ENTER].

7. If the desired setup conditions are anything other than DEFAULT, set using menus

or proceed to Recalling Setups below before continuing with step 8. (Setup
measurement times are ignored in manual mode).

8. Initiate the charge phase by pressing [START] to apply high voltage to the

device. The High Voltage Indicator will remain on as long as a voltage is applied.
The measurement can be aborted at any time during the test cycle by pressing
[STOP].

9. Initiate a single measurement by pressing [START] again, The measured result

will be displayed on the LCD and will be updated each time [START] is pressed.

10. To discharge the device press [STOP].

11. Before removing the device press [STOP] again to end the discharge phase and turn

the High Voltage Indicator off.

Recalling Setups

1. To recall a set of test conditions previously stored:

Press [MENU] key to select menu display.
Press Right or Left Arrow key to select Utilities menu.
Press Up or Down Arrow key to select Recall Setup.
Press [ENTER] key to activate the recall entry field.
Press Up or Down Arrow key to select the desired setup. choices are:

- DEFAULT, if conditions are power up which can be changed by the

user.

- FLOPPY, if setup is to be recalled from the optional floppy drive.

- Setup Name stored in the instrument internal memory or floppy.

Once the desired setup is located press [ENTER] key to finalize recall of the
setup conditions.

Page 17 of 87

Condensed Operating Instructions

Saving Setups

1. To save the current set of test conditions as entered (conditions include, voltage, test

times, measurement range, limit, and display modes):

Press [MENU] key to select menu display.
Press Right or Left Arrow key to select Utilities menu.
Press Up or Down Arrow key to select Save Setup.
Press [ENTER] key to activate setup entry field.
Press UP or Down Arrow key to select the desired setup, choices are:

- NEW, if a setup is to be saved in instruments internal memory.

- DEFAULT, if conditions at power up are to be changed and restored.

- FLOPPY, if a new setup is to be stored or existing one changed on the

floppy.

- Setup Name if an existing set of conditions are to be changed in the

instrument internal memory or floppy.
Press [ENTER] key to activate the Save entry field selected above.
If NEW is selected (internal memory or floppy) enter the desired identifying
name, up to 8 characters, under which these set of test conditions will be
stored.
Press [ENTER] key to finalize storage of the setup conditions or if DEFAULT

is selected one must answer Y or N to overwrite.

Changing Test Voltage

1. Set the desired test voltage:

Press [MENU] key to select menu display.
Press Right or Left Arrow key to select Setup menu.
Press Up or Down Arrow key to select Voltage.
Press [ENTER] key to activate the voltage entry field.
Enter desired test voltage (up to 5 digits with decimal) between 1 and 1000V.

Press [ENTER] key to finalize the voltage entry.
Changing Measurement Times

1. To set the desired measurement cycle times, charge, dwell, measure and discharge:

Press [MENU] key to select menu display.
Press Right or Left Arrow key to select Setup Menu.
Press Up or Down Arrow key to select desired time: charge, dwell, measure or
discharge.
Press [ENTER] key to activate the corresponding time entry field.
Enter the desired time between 0 and 300 seconds(measure, 0 – 999 on later units)
Press [ENTER] key to finalize the time entry.

2. Continue to set the other times as desired by repeating step 1.

Page 18 of 87

Condensed Operating Instructions

Setting Pass/Fail Limit

1. To enter a single measurement limit for resistance or current (depending on results

display selected):

Press [MENU] key to select menu display.
Press Right or Left Arrow to select Setup menu.
Press Up or Down Arrow key to select Limit in sub menu.
Press [ENTER] key to activate the limit entry field.
Enter the numerical value (up to 4 digits plus decimal point) of the limit
desired, then enter the exponential value after first pressing the e select key
(use minus exponential value for current).
Press [ENTER] key to finalize the limit entry.

Changing Display Type and Units

1. To change displayed measurement results between Resistance, Current or Pass/Fail:

Press [MENU] key to select menu display.
Press Right or Left Arrow key to select I/O Menu.
Press Up or Down Arrow key to select Display.
Press [ENTER] key to activate the selection field.
Press Up or Down Arrow key to select desired measurement results,
Resistance, Current or Pass/Fail if a limit is to be used.
Press [ENTER] key to finalize the entry.

2. To change the measurement results format between Scientific or Engineering units:

Press [MENU] key to select menu display.
Press Right or Left Arrow key to select I/O Menu.
Press Up or Down Arrow key to select Result Format.
Press [ENTER] key to activate the selection field.
Press Right or Left Arrow to select desired results format, Sci for Scientific or
Eng for Engineering.
Press [ENTER] key to finalize the entry.

Page 19 of 87

Section 1: Introduction

WARNING

High voltage is applied to the measurement terminals of the 1865 anytime the CAUTION HIGH

VOLTAGE LED is ON. While the current from the instrument is limited to a value that is not dangerous

under most conditions, the energy stored in a capacitor connected to the terminals may be lethal. Always

make sure the CAUTION HIGH VOLTAGE LED is OFF when connect i ng or disconnecting the

unknown.

1.1 Unpacking and Inspection

Inspect the shipping carton before opening. If the carton is damaged, contact the carrier
agent immediately. Inspect the 1865 instrument for any damage. If the instrument
appears damaged or fails to meet specifications notify QuadTech (refer to instruction
manual front cover) or its local representative. Retain the shipping carton and packing
materials for future use such as returning for recalibration or service.

1.2 Product Overview

The 1865 Megohmmeter/IR Tester is a general purpose high voltage instrument for
resistance measurements on insulating materials and components. It is designed for easy,
accurate and direct readings of high resistance typically found in synthetic resins,
porcelains, insulating oils, plastics and other similar materials. It is also used for
measurements on capacitors, transformers, switches, cables and connectors. The 1865
provides a direct readout of resistance from 1000Ω to 1000TΩ with fully automatic
ranging. The voltage applied to the unknown is programmable from 1V to 1000V.

The 1865 includes a high resolution graphics display and keypad for ease of use. The test
cycle is fully automatic with programmable charge, dwell, measure and discharge times.
These times, along with other test conditions can be stored in instrument memory and
recalled for later use. A pass/fail indicator provides the operator with a visual indication
based on a preset resistance limit. The unit also contains automatic zeroing at the test
leads as well as built-in self-test routines. Safety features include current limiting to less
than 2mA and a front panel indication when voltage is applied to the test terminals, thus
permitting connections to be made safely.

The 1865 comes standard with I/O Port (handler) and RS232 interface. An IEEE-488
interface is optional for communication with other instrumentation and remote control
operation. A 3 1/2" floppy drive option is also available for storing test conditions and
results. There is a direct reading current measurement mode from 1mA to 1pA.

The unit is available with front or rear panel input connections with guard and ground
terminals to permit measurements of grounded or ungrounded devices.

Introduction Page 21 of 87

1.3 Controls and Indicators

1.3.1 Front Panel Controls and Indicators

Figure 1-1 shows the controls and indicators on the front of the 1865 unit. Table 1-1
identifies them with description and function.

13 12 11 10

QQQQ

uadTech

1865

+

Megohmmeter
IR Tester

!

CAUTION

HIGH VOLTAGE

-

DISPLAY ENTRYSELECT TEST

MENU

RESISTANCE

133.620M

Voltage = 100

Mode = AUTO

Ω

Range = 1uA <A>

321

CNCL

654

987

0

ENTER

.-

STOP

START

GUARD

16

432

10

98

75

Figure 1-1: Front Panel Controls & Indicators

Table 1-1: Front Panel Controls and Indicators

Reference
Number
Figure 1-1

1 Input Panel Connection for device under t est (DUT)
1a GROUND Green Sheathed

1b + Red Sheathed

1c - Black Sheathed

1d GUARD Blue Sheathed

2 Display LCD Graphic Displays measurement results, instrument

3 SELECT 4 Gray Push Buttons Function as indicated on adjacent display

4 Keypad White Push Buttons 12 keys for making numerical entries: 0-9,

Name Type Function

Ground Terminal for jumper of (+) Input

Banana Plug

Terminal or Guard Input to Chassis GND
High Voltage Terminal for connection to

Banana Plug

DUT
Low Voltage Terminal for connection to

Banana Plug

DUT
Guard Terminal for 3-Lead Guarded

Banana Plug

Measurements

status and user interface menus.

From top to bottom: functions as: Up (↑↑↑↑),
Down (↓↓↓↓), Right (→→→→) or Left (←←←←) during
Menu Selection. Other functions include:
measurement units, exponent, Yes or No
and del (delete).

decimal point and minus sign.

Page 22 of 87 Introduction

Table 1-1: Front Panel Controls and Indicators (Continued)

5 MENU Green Push Button Press to enter menu display mode or press

to exit sub menu & return to main menu.

6 CNCL Gray Push Button To exit menu mode with no parameter

changes made or to exit current field

7 ENTER Gray Push Button To switch user to entry mode or to accept

menu entry as entered.
8 START Green Push Button To initiate the measurement
9 POWER Black Toggle Switch To apply power to the instrument:

1 = ON, 0 = OFF
10 OPTION 3 ½ “ Floppy Drive To store test setup conditions and

measurement results. High Density (HD:

1.44M) or Low Density (LD: 720k)

compatible floppy drive. Floppies should be

double sided and formatted for DOS

compatibility.
11 STOP Red Push Button To stop the measurement (terminate high

voltage at the output terminals)
12 TEST Indicate P/F Measurement Result based on

preset limit
12a FAIL Red LED

12b PASS Green LED

13 Caution High Voltage Red LED When lit, indicates presence of High

When lit in Resistance Mode, the measured

value is below the set minimum value

(resistance limit).

When lit in Current Mode, the measured

value is above the set maximum value

(current limit).

When lit, in Resistance Mode, the

measured value is above the set minimum

value (resistance limit).

When lit in Current Mode, the measured

value is below the set maximum value

(current limit).

Voltage at the output terminals.

Introduction Page 23 of 87

1.3.2 Rear Panel Controls and Connectors

Figure 1-2 illustrates the controls and connectors on the rear panel of the 1865
Megohmmeter/IR Tester. Table 1-2 identifies them with description and function.

8

76

NO USER SERVICEABLE PARTS INSIDE
TO PREVENT ELECTRICAL SHOCK

!

DO NOT OPEN COVERS
REFER TO QUALIFIED PERSON

RS 232 INTERFACEIEEE-488 INTERFACE BATTERY

I/O PORT

PARALLEL PORT

REPLACE WITH
THREE SIZE AA

POSITIVE

TERMINAL OUT

MADE IN USA

543

FUSE 250V
90-250V T2.5A 5x20mm

12

CAUTION: FOR CONTINUED
PROTECTION AGAINST FIRE
HAZARD REPLACE ONLY
WITH SAME TYPE AND
RATING OF FUSE

90-250V
47-63Hz
40 WATTS MAX

Figure 1-2: Rear Panel Controls and Connectors

Table 1-2: Rear Panel Connectors and Controls

Reference
Number
Figure 1-2

1 AC Inlet Module Black 3-Prong

2 Vent Rear Panel Portion Instrument ventilation
3 I/O Port 36-pin Male

4 Parallel Port Not Available Not Available
5 Option 1865-03 Rear Panel Input Terminals: Ground, (+), (-

6 Battery 3, AA Size Batteries DC source for System Memory back-up.

7 RS232 Interface 9-pin DB9 Male 9-pin connector for RS232 I/O transfers
8 IEEE-488 Interface 24-pin Male 24-pin connector for IEEE-488 I/O

Name Type Function

3-wire connection for AC power source.

Receptacle & Fuse

90-250V AC: T2.5A 250V 5x20mm Fuse

Drawer

36-Pin Connector for Component Handler.
Amp 552302-1
compatible

Use with Amp 552302-1 plug & 552073-5

strain relief cover or ribbon cable clamp

connector 553600-1 or equivalent(s).

) and Guard for connection to DUT with

High Voltage I ndicator

3 AA batteries need to be replaced yearly.

transfers

Page 24 of 87 Introduction

1.4 Installation

1.4.1 Dimensions

The instrument is supplied in a bench configuration, i.e., in a cabinet with resilient feet
for placement on a table. A bail is provided under the front edge so that the instrument
can be tilted back for convenient operator viewing.

QuadTech

133.4mm
5 1/4"

406.4mm

444.5mm

17.5"

16"

Figure 1-3: 1865 Instrument Dimensions

1.4.2 Instrument Positioning

The 1865 instrument contains a high resolution back lit LCD for convenient viewing.
The optimum angle for viewing is slightly down and about 30° either side of center. This
means that for bench operation the front bail should always be used to angle the
instrument up and for rack installation it should be mounted at eye level or higher.

1.4.3 Power Requirements

!

The 1865 Megohmmeter/IR Tester can be operated from a power source between
90 and 250Vac at a power line frequency of 47 to 63Hz. Power connection to the rear
panel is through an AC inlet module comprised of an AC connector and fuse drawer.
Before connecting the 3-wire power cord between the unit and AC power the fuse should
be in accordance with the power source, T2.5A, 250V, 5x20mm (QuadTech PN 520049)
for 115V or 220V source. Always use an outlet which has a properly connected
protection ground. The standard 1865 is factory shipped with the 2.5A fuse in place.
The instrument can be damaged if the wrong fuse is installed. To change the fuse
proceed as follows:

Introduction Page 25 of 87

PROCEDURE FOR CHANGING A FUSE

WARNING

Make sure the unit has been disconnected from its AC power source for at least five

minutes before proceeding.

Fuse drawer with release tab

I/O PORT

RS-232 INTERFACE

BATTERY

90 - 250 V
47 - 63 Hz
40 WATTS MAX

IEEE-488 INTERFACE

PARALLEL PORT

Figure 1-4: 1865 Instrument Fuse Drawer

• Remove the fuse drawer by inserting a small flat head screwdriver behind the small

tab to force the draw outward.

• Once the fuse draw has been completely removed from the instrument now remove

the clear fuse tray from the drawer by lifting upward slightly on the long narrow
locking tab. This will allow the fuse tray to be removed from the fuse draw. This tray
contains the active fuse (secured by holder).

• Remove the fuse from the holder by prying upward using a small flat head

screwdriver. Insert the replacement fuse into the fuse holder.

• Once the fuse has been installed in the holder and spare fuse (if desired) installed in

the right side of the tray insert the tray back into the fuse drawer, push in and lock.
The two silver contacts on the fuse tray should be positioned towards the outside.

• Once the fuse tray has be installed in the draw, reinstall the fuse draw back into the

instrument ac inlet module, push in and lock.

Page 26 of 87 Introduction

1.4.4 Safety Inspection

!

Before operating the instrument inspect the AC power inlet module on the rear of

the 1865 instrument to ensure that the properly rated fuse is in place, otherwise damage
to unit is possible. Refer to paragraph 1.4.3.

The 1865 instrument is shipped with a standard U.S. power cord, QuadTech PN 4200­0300 (with Belden SPH-386 socket or equivalent, and 3 wire plug conforming to IEC

320) and CE units with an approved international cord set. Make sure the instrument is
only used with these cables (or other approved international cord set) which ensures the
instrument is provided with connection to protective earth ground.

When the 1865 instrument is used in a rack installation (using the QuadTech 1865-50
Rack Mount Kit) make sure the unit is secured using the cabinet mounting rai ls and
not securely solely by the front panel angle brackets.

In bench or rack mount applications the instrument should be positioned with
consideration for ample air flow to the rear panel fan ventilation holes. An open space
of at least 3 inches (75mm) is recommend behind the rear panel. The surrounding
environment should be free from excessive dust to prevent contaminati on of electronic
circuits.

WARNING

If this instrument is used in a manner not specified in this manual protection to the

operator and equipment may be impaired.

Read this instruction manual in full before operating this instrument.

Introduction Page 27 of 87