TPI 196 Instruction manual

196

Digital Multimeter

Instruction Manual

TABLE OF CONTENTS

page

A. INTRODUCTION

1. Congratulations

···············

4

2. Product Description

············

4

3. EC Declaration of Conformity

······

5

B. SAFETY CONSIDERATIONS

·········

6

C. TECHNICAL DATA

1. Features and Benefits

···········

8

2. Product Applications

···········

9

3. Specifications

················

10

D. MEASUREMENT TECHNIQUES

1. Controls and Functions

·········

15

2. Power on Options

·············

16

3. Step by Step Procedures: a) Measuring DC Volts

·········

18 b) Measuring AC Volts

·········

20 c) Measuring DC Amps

·········

21 d) Measuring AC Amps

·········

23 e) Measuring Resistance

········

24 f) Measuring Diodes

···········

25 g) Continuity Buzzer

···········

26 h) Measuring Frequency

········

27 i) Record Mode

··············

28 j) Compare Mode

············

29 k) Relative %Mode

············

30 l) Two-Hold System

···········

31 m) Using the Current Output

Functions

················

32

1) Source Mode

············

32

2)

Simulate Mode

···········

32

3)

Producing a Steady mA Output 33

2

3

4)

Manually Stepping the mA

Output

················

34 n) Loop Power Supply Mode

·····

36 o) RS-232C interface

··········

37

E.

ACCESSORIES

·················

40

F.

MAINTENANCE

·················

41

G. TROUBLE SHOOTING GUIDE

········

42

A. INTRODUCTION

INTRODUCTION

1.

Congratulations!!

Thank you for purchasing a TPI Digital Multimeter. The

Triple Display196 is an innovative new concept in DMM design. The unique display enables you to view more than one event at a time. This eliminates the hassle of switching back and forth to review minimum, maximum or preset comparative values. The meter is also easy to use and built to last.

2.

Production Description

The DMM 196 is a hand-held autoranging DMM. The backlit

LCD can display three readings at one time. In addition to basic function of AC/DC V, AC/DC A, Ohm, Diode test, continuity, Capacitance, Frequency, there is the adaptor function. The DMM 196 also has RS232 output and software for recording information into a PC.

The DMM 196 also features:

•

REC

Records Min/Max and Average readings during specified measurement intervals.

•

COMP

Compare actual reading to preset HI and LOW value for Pass/Fail testing of component.

•

HOLD

Tow hold system automatically holds the previous stable reading when a new one is obtained.

The DMM 196 comes complete with the following accessories:

Battery

Rubber Boot

Test Lead Set

Instruction Manual

4

5

3.

EC Declaration of Conformity

This is to certify that model DMM 196 conforms to the protection requirement of the council directive 89/336/EEC, in the approximation of laws of the member states relating to

Electromagnetic compatibility and 73/23/EEC, the low voltage Directive by application of the following standards:

EN 50081-1

EN 50082-1

1992 Emissions standard

1992 Immunity standard

EN 61010-1 1993 Safety standard

EN 61010-2-031 1995 Safety standard

To ensure conformity with these standards, this instruction must be operated in accordance with the instruction and specifications given in this manual.

CAUTION:

Even though this instrument complies with the immunity standards, the accuracy can be affected by strong radio emissions not covered in the above standards. Sources such as hand held radio transceivers, radio and TV transmitters, vehicle radios and cellular phones generate electromagnetic radiation that could be induced into the test leads of the instrument. Care should be taken to avoid such situations or alternatively, check to make sure that the instrument is not being influenced by these emissions.

B. SAFETY CONSIDERATIONS

WARNING!

: Please follow manufacturers test procedures whenever possible. Do not attempt to measure unknown voltages or components until a complete understanding of the circuit is obtained.

GENERAL GUIDELINES

ALWAYS

• Test the DMM 196 before using to make sure it is operating property.

• Inspect the test leads before using to make sure there are no breaks or shorts.

• Double-check all connections before testing.

• Have someone check on you periodically if working alone.

• Have a complete understanding of the circuit under test.

• Disconnect power to circuit, and then connect test leads to the DMM 196, and then to circuit being measured.

NEVER

• Attempt to measure unknown high voltage.

• Attempt to measure current with the meter in parallel to the circuit.

• Connect to the test leads to a live circuit before setting up the instrument.

• Touch any exposed metal part of the test lead assembly.

6

7

INTERNATION SYMBOLS

CAUTION: RISK OF ELECTRIC SHOCK

AC (ALTERNATING CURRENT)

DC (DIRECT CURRENT)

REFER TO INSTRUCTION MANUAL

GROUND

FUSE

DOUBLE INSULATION

C. TECHNICAL DATA

1.

Features and benefits

Safety

Meets CE and IEC 1010 requirements. UL

Listed to U.S. and Canadian Safety

Standards.

True RMS

Needed to accurately measure nonsinusoidal AC voltage and current waveforms found on many controls and circuits.

Triple Display

Shows more than one reading simultaneously.

Two-Hold

System

Holds two readings on the display at thesame time.

Auto Power Off

Automatically powers instrument down after 15 minutes of inactivity, yet will continue acquiring data in its various modes.

Record

Compare

Records Min/Max and Average values

Compares stored value with measured value for matching components.

Relative

Displays measured value as a % of stored

Percentage

value for checking component tolerances.

RS232 Output

Transfers data directly to a PC while measuring.

Back Light

Allows viewing in any light condition.

Auto range

Automatically selects the best range for the measurement.

8

9

Perform the following tests and/or measurements with the

DMM196 and the appropriate function:

HVAC/R

DC mV

ACA

ACV

• Gas application.

• Heat anticipator current in thermostats.

• Line voltage.

ACV or DCV

• Control circuit voltage.

DcuA

• Flame safeguard control current.

OHMS

• Heating element resistance (continuity).

OHMS

• Compressor winding resistance.

OHMS

OHMS

• Contactor and relay coil resistance.

• Continuity of wiring.

Hz/FREQ

• Frequency of line and control voltage.

CAP

REC

• Motor start and run capacitance.

• Record min/max voltage of controls and line voltages.

ELECTRICAL

ACV

• Measure line voltage.

OHMS

• Continuity of circuit breakers.

Hz/FREQ


DCV

• Voltage of direct drive DC motors.

ELECTRONIC

ACV

OHMS

• Measure power supply voltage.

• Continuity of circuit breakers.

REL%

COMP

• Match components

• Compare readings in circuit or components

Hz/FREQ


3.

Specifications

IEC 1010 Over Voltage:

CAT II-1000VDC, 750VAC

CATIII-600V

Pollution Degree 2

※ INSTALLATION I·II·III

INSTALLATION CATEGORY(OVERVOLTAGE CATEGORY)

I :

Signal level, special equipment or parts of equipment, telecommunication, electronic etc., with smaller transient overvoltages than INSTALLATION CATEGORY

II.


II :

Local level, appliances, PORTABLE EQUIPMENT etc., with smaller transient overvoltages than

INSTALLATION CATEGORY

III.


III :

Distribution level, fixed installation, with smaller transient overvoltages than

INSTALLTION CATEGORY

IV.

10

3.

Specifications (cont.)

General Specifications

a. DCV

Range Resolution Accuracy

5V 0.0001V

+/-0.05% of reading,

50V 0.001V

+/- 4digits

500V 0.01V

1000V 0.1V

+/-0.1% of reading, +/- 10digits

Impedance

10M Ω

b. DCmV


50mV 0.001mV +/-0.1% of reading, +/- 10digits

500mV 0.01mV

Impedance c. ACV(45Hz to 450Hz)

Range Resolution Accuracy Impedance

5V 0.0001V

+/-0.4% of reading, +/- 40digits 10M Ω

50V 0.001V

500V 0.01V

1000V 0.1V

11

3.


d. DCA


Overload protection

5mA 0.0001mA +/-0.5% of reading, Fuse(fast blow)

50mA 0.001mA

+/- 5digits F600V, 0.5A 31CM

500mA 0.0001A

+/-0.75% of reading, Fuse(fast blow)

1A 0.01mA

+/- 5digits F600V, 1A 31CM

e. ACA



5mA 0.0001mA +/-0.75% of reading, Fuse(fast blow)

50mA 0.001mA

+/- 5digits F600V, 0.5A 31CM

500mA 0.0001A

+/-1.5% of reading, Fuse(fast blow)

1A 0.01mA

+/- 5digits F600V, 1A 31CM

f. OHM(Resistance)

Range Resolution Accuracy Overload protection

500Ω 0.01Ω

5KΩ

+/-0.05% of reading,

0.0001KΩ +/- 5digits

600V DC or AC peak

50KΩ 0.001KΩ

500KΩ 0.01KΩ

5MΩ 0.0001MΩ +/-1.0% of reading,

50MΩ 0.001MΩ +/- 10digits

g. Diode test

Range

3V

Resolution

Approx. 1mA

Accuracy Overload protection

600V DC or AC peak

12

3.


h. Continuity Buzzer

Test voltage

3V

Threshold

30digits


600V DC or AC peak

i. Current Output

Mode

Source

Smulate

Range

0~24mA

0~24mA

Accuracy

0.1% of reading, +/- 10digits

j. Frequency

Range Resolution Accuracy Overload protection

500Hz 0.01Hz

5Khz 0.0001Khz

+/-0.05% of reading, 600V DC or AC

+/- 5digits peak

50Khz 0.001Khz

500Khz 0.01Khz

k. Adaptor

Model

A301(Temp Adaptor C/F)

A254(Current Adaptor 10/60A)

Display

1mV/C, 1mV/F 0000.0 C/F

100mV/A,

10mV/A

00.000A

000.00A

A256(Current Adaptor 40/400A) 1mV/A

A296(Current Adaptor 400/1000A) 1mV/A

0000.0A

0000.0A

3.


l. General Specifications

Max. volt. between any input and Ground

1000V

Fuse protection

mA :

0.5A/600VAC;

A :

10A/600VAC

Display Type Digital : 50000 count, 4 times/S update Bar

Operating temp.

Storage Temp.

Relative Humidity graph : 51 segment

0°C to 40 °C (32°F to 113°F)

-20°C to 60°C (-4°F to 140°F)

0% to 80% ( 0° ~ 35 °C/ 32° ~ 95°F)

0% to 70% ( 35° ~ 55 °C/ 95° ~ 131°F)

9Volt battery Power Supply

Battery Life

Size(H x L x W)

Weight

13 14

D. MEASUREMENT TECHNIQUES

1.

Controls and function:

Push Button

RANGE

REC

REL %

EDIT

COMP

HOLD

Activates manual range

Activates the Min/Max/Avg mode.

Activates REL% mode.

Activates the EDIT mode for the compare and relative % function.

Activates Backlight for the

LCD(Automatically turns off after approx.

35 sec.)

Activates Compare mode.

Activates two-hold data hold mode

Rotary Switch

OFF

Turns the instrument off.

DCmV

DCV

ACV

Selects the DC mV function

Selects the DCV function

Selects the ACV function

Selects the Diode test function

Selects the Ohm function (Push ORANGE button to activate continuity buzzer.)

Selects the Frequency function

Selects the DC mA function (Push

ORANGE button to activate AC mA.)

Adp

Selects the DC A function (Push ORANGE button to activate AC A.)

Can use A254, A256, A296 and A301

(Push ORANGE button to activate AC adaptor, and push RANGE button to choose kind of adaptor)

Input Jacks

V/Ohm

COM uA/mA

A

Red test lead connection for all Volt, Ohm,

Diode, and Continuity measurement.

Black test lead connection for all functions.

Red test lead connection for current measurement on the AC/DC uA and AC/DC mA.

Red test lead connection for current measurement on the AC/DC A.

RS-232

See section on RS-232C interface

2.

Power on Options:

Disable Auto Off

Current output

Hold down the REC button while turning on the instrument.

Hold down the Range button while turning on the instrument.

15 16

17

Application Notes

When measuring DC Voltage of a battery, the most accurate reading can be attained by testing the battery under load. To accomplish this, follow steps 1 through 4 above and the following (with the battery in holder and device turned on):

• Connect the red test lead from the meter to the positive (+) terminal of the battery.

• Connect the black test lead to the negative

(-) terminal of the battery.

• Reconnect power to the circuit and read the voltage on the 190.

3.

Step by step procedure

a. Measuring DC Volts

CAUTION

Do not attempt to make a voltage measurement if a test lead is plugged in the A or mA input jack. Instrument damage and/or personal injury may result.

WARNING!

Do not attempt to make a voltage measurement of more than 1000V or of voltage level that is unknown.

Instrument set-up:

FUNCTION BLACK

TEST LEAD

COM

COM

RED

TEST LEAD

VΩ

VΩ

MINIMUM

READING

MAXIMUM

READING

0.001mV

500.00mV

0.0001V

1000.0V

Measurement Procedure:

1. Disconnect power to circuit to be measured.

2. Plug black test lead into the

COM

input jack.

3. Plug red test lead into the input jack.

4. Set rotary switch to either the

DCmV

or

DCV

range, depending on the voltage to be measured.

5. Connect test leads to circuit to be measured.

6. Reconnect power to circuit to be measured.

7. Read the voltage on the LCD.

18

19


Disconnect power from the terminal block, find the fuse or circuit breaker that controls the block and turn it off.

Set up the meter following the steps under “Measurement

Procedure” on page 13. Then proceed with the following:

• Connect the red test lead to the hot side of the block and the black lead to the neutral side of the block. Reconnect power to the block and read the voltage on the meter. The reading should be approximately 110V to 130V.

• Disconnect power from the block and move the red wire to ground. Reconnect power to the block and read the voltage on the meter. Typically less than 20V should exist from neutral to ground. If

110V or above exists, the block may be wired incorrectly.

b. Measuring AC Volts

CAUTION

Do not attempt to make a voltage measurement if a test lead is plugged in the A or umA input jack. Instrument damage and/or personal injury may result.

WARNING!

Do not attempt to make a voltage measurement of more than 750V or of a voltage level than is unknown.


FUNCTION BLACK

TEST LEAD

COM

RED

TEST LEAD

MINIMUM

READING

MAXIMUM

READING

0.0001V

750.0V



2. Plug black test lead into

COM

input jack.


4. Set the rotary switch to the

ACV

function depending on the voltage to be easured.



7. Read the voltage on the LCD.

20

21 c. Measuring DC Amps

CAUTION

Do not attempt to make a current measurement with the test leads connected in parallel with the circuit to be tested. Test leads must be connected in series with the circuit.

WARNING!

Do not attempt to make a current measurement of circuits with more than 600V present. Instrument damage and/or personal injury may result.


FUNCTION BLACK

TEST LEAD

COM

COM

RED MINIMUM

TEST LEAD READING

mA

A

MAXIMUM

READING

0.001mA 500.00mA

0.0001A

10.000A

Measurement Procedure:



COM

input jack.

3. Plug red test lead into the

mA

or

A

input jack depending on the value of current to be measured.

4. Set the rotary switch to the or function.

5. Connect the test leads in series to the circuit to be measured.


7. Read the current on the LCD.


When measuring the DC current of a flame controller, follow the steps under “Measurement Procedure” above and then proceed with the following:

• Set up the meter for making a µA measurement.

• Connect the meter to the flame controller lead by opening the circuit and inserting the leads in series with the circuit as shown in the picture above.

22

23 d. Measuring AC Amps

CAUTION

Do not attempt to make a current measurement with the test leads connected in parallel with the circuit to be tested. Test leads must be connected in series with the circuit.

WARNING!

Do not attempt to make a current measurement of circuits with more than 600V present. Instrument damage and/or

personal injury may result.


FUNCTION BLACK

TEST LEAD

RED

TEST LEAD

MINIMUM

READING

MAXIMUM

READING

COM mA 0.001mA

500.00mA

COM A 0.0001A

10.000A

Measurement Procedure

:



COM

input jack.

3. Plug the red test into the

mA

or

A

input jack depending on the value of current to be measured.


5. Press the orange push button.

or function.

6. Connect test leads in series to circuit to be measured.


8. Read the current on the LCD.

e. Measuring Resistance

WARNING!

Do not attempt to make resistance measurements with circuit energized. For best results, remove the resistor completely from the circuit before attempting to measure it.

NOTE:

To make accurate low ohm measurements, short the ends of test leads together and record the resistance reading.

Deduct this value from actual readings.


FUNCTION BLACK

TEST LEAD

COM

RED

TEST LEAD

MINIMUM

READING

0.01Ω

MAXIMUM

READING

50.000MΩ




COM

input jack.

3. Plug red test lead into input jack.

4. Set the rotary switch to the function.

5.Connect the test leads to the circuit to be measured.

6. Read the resistance value on the LCD.

24

25 f. Measuring Diodes

CAUTION

Do not attempt to make diode measurements with circuit energized. The only way to accurately test a diode is to remove it completely from the circuit before attempting to measure it.


FUNCTION BLACK

TEST LEAD

COM

RED

TEST LEAD

MINIMUM

READING

MAXIMUM

READING

0.001V 2.0000V




COM

input jack.

3. Plug red test lead into input jack.


5. Connect the black test lead to the banded end of the diode and the red test lead to the non-banded end of the diode.

6. Reading on the display should be between 0.5 and 0.8

volts.

7. Reading test lead connections in 5 above.

8. Reading on the display should be OFL(Overflow).

NOTE: If diode reads 0 in both directions, diode is shorted. If diode reads OFL in both directions, diode is open.

g. Continuity Buzzer

WARNING!

Do not attempt to make continuity measurements with

circuit energized.

I


FUNCTION BLACK TEST LEAD

COM

RED TEST LEAD




COM

input jack.



5. Press the orange push button to activate the continuity buzzer.


7. Listen for the buzzer to confirm continuity.

26

27 h. Measuring Frequency

WARNING!

Never attempt a frequency measurement with a voltage source greater than 600V. Determine the voltage of any unknown frequency source before connecting the instrument in frequency source before connecting the instrument in frequency mode.

FUNCTION BLACK

TEST LEAD

COM

RED

TEST LEAD

MINIMUM

READING

MAXIMUM

READING

0.01Hz 500.00KHz




COM

input jack.



5. Press the orange push button.

function.


7. Read the frequency on the LCD.

i. Record Mode

The record mode saves minimum (MIN) and maximum

(MAX) values measured for a series of readings. The main part of the LCD displays the actual reading, the MAX value is constantly displayed on the lower left hand sub-display while the MIN value is constantly displayed on the lower right hand sub-display. Activate the function as follows:

1. Depress the

REC

button on the 196.

2. The DMM 196 will immediately start to record and display

MIN/MAX values on the two lower sub-displays.

3. Press

REC

button a second time and the AVG(average) reading will be displayed.

4. Press the

REC

button again to return to normal record mode.

28

29 j. Compare Mode

The compare mode takes the actual reading on the main display and compares it to LOW and HIGH values, programmed by the user, on the sub-displays. This is used to compare components or measurements for acceptable readings. Activate the function as follows:

1. To use

Compare Mode

manually select the correct range for the function.

2. Depress the

COMP

button.

3. Depress the

EDIT

button the right hand digit under the

HIGH sub-display will start to flash.

4. Depress the

REL

% or

HOLD

buttons until the correct number is selected for the position.

5. Depress the

REC

button. The next digit to the right of 3 above will start to flash.

6. Repeat steps 4 and 5 until the correct values for all eight digits under LOW and HIGH sub-display are entered.

7. After the correct LOW and HIGH values are entered, depress the

EDIT

button.

8. Measure the circuit or component being compared to the programmed values. Results will be displayed as PASS for the acceptable readings, LO for low readings, and HI for high readings.

9. Depress the

COMP

button or turn the rotary switch to exit the function.

k. Relative % Mode

The Relative % mode takes the actual reading on the main display and compares it to a reference value programmed by the user on the right hand sub-display. The left hand subdisplay will show the percentage the actual reading varies from the reference value. Activate the function as follows:

1. To use

Relative

% mode manually select the range for the function.

2. Depress the

REL

% button.

3. Depress the

EDIT

button. The right hand digit under the

REF

sub-display will start to flash.

4. Depress

REL

% or

HOLD

buttons until correct number is selected for that display position.

5. Depress the

REC

button. The next digit to the right of 3 above will start to flash.

6. Repeat steps 4 and 5 until correct values for all four digits under

REF

sub-display are entered.

7. After the correct

REF

value is entered, depress the

EDIT

button.

8. Measure the circuit or component being compared to the programmed reference value. Results will be displayed as a percentage in the lower left hand left hand sub-display.

9. Depress the

REL

% button or turn the rotary switch to exit the function.

30

31 l. Two-Hold System

The two-hold system is a data hold feature that will automatically store a stable reading under the 1 HOLD subdisplay in the lower left hand corner of the LCD. When a new, stable reading is obtained, the reading under 1 HOLD will be moved to 2 HOLD and the new reading will be displayed under 1 HOLD

Depress the

HOLD

button to activate the feature.

Push the button again to de-activate the feature.

m. Using the Current Output Functions

The meter provides steady, stepped, and ramped current output for testing 0-20 mA and 4-20 mA current loops.

Choose source mode, in which the meter supplies the current, simulate mode, in which the meter regulates

1) Source Mode

Source mode is selected automatically by inserting the test leads into the SOURCE + and - jacks. Use source mode whenever it is necessary to supply current into a passive circuit such as a current loop with no loop supply.

Source mode depletes the battery faster than simulate mode, so use simulate mode whenever possible. The display looks the same in source and simulate modes.

The way to tell which mode is in use is to see which pair of output jacks is in use.

2) Simulate Mode

Simulate mode is so named because the meter simulates a current loop transmitter. Use simulate mode when an external dc voltage of 15 to 48 V is in series with the current loop under test.

CAUTION

Set the rotary function switch to one of the mA output settings BEFORE connecting the test leads to a current loop. Otherwise, a low impedance from the other rotary function switch positions could be presented to the loop, causing up to 35 mA to flow in the loop.

Simulate mode is selected automatically by inserting the test leads into the SIMULATE + and - jacks. Simulate mode conserves battery life, so use it instead of source mode whenever possible. The display looks the same in source and simulate modes. The way to tell which mode is in use is to see which pair of output jacks is in use.

32

33

Changing the Current Span

The meter’s current output span has two settings (with overrange to 24 mA):

●

4 mA = 0 %, 20 mA = 100 %

●

0 mA = 0 %, 20 mA = 100 %(factory default)

To find out which span is selected, short the OUTPUT

SOURCE + and - jacks, turn the rotary function switch to

OUTPUT [ mA, and observe the 0 % output level. To toggle and save the current output span in nonvolatile memory

(retained when the power is turned off):

1. Turn off the meter.

2. Hold down RANGE while turning the meter on.

3. Wait at least 2 seconds, then release RANGE.

3) Producing a Steady mA Output

When the rotary function switch is in the OUTPUT [ mA position, and the OUTPUT jacks are connected to an appropriate load, the meter produces a steady mA dc output.

The meter begins sourcing or simulating 0 %. Use the pushbuttons to adjust the current as shown in Table 1.

Select either sourcing or simulating by choosing the

SOURCE or SIMULATE output jacks.

Note

The STEP pushbuttons described Table 9 are available when the meter is producing a steady mA output. The

STEP pushbuttons go to the next multiple of 25 %.

Table 1. mA Output Adjust Pushbuttons

Buttons Adjustment

COARSE

REL

HOLD

Adjusts up 0.1mA

Buttons

EDIT

Adjustment

FINE

Adjusts up 0.001mA

Adjusts Down 0.1mA

ORANGE

Adjusts Down 0.001mA

Table 2. mA Stepping Pushbuttons

Buttons Adjustment

STEP

REC

COMP

Adjusts up to the next higher 25 % step

Adjusts up to the next lower 25 % step

4) Manually Stepping the mA Output

When the rotary function switch is in the OUTPUT [ mA position, and the OUTPUT jacks are connected to an appropriate load, the meter produces a steady mA dc output.

The meter begins sourcing or simulating 0 %. Use the pushbuttons to step the current up and down in 25 % increments as shown in Table 2. See Table 3 for mA values at each 25 % step. Select either sourcing or simulating by choosing the SOURCE or SIMULATE output jacks

Note

The COARSE and FINE adjustment pushbuttons described in Table 1 are available when manually stepping the mA output.

0 %

25 %

50 %

75 %

100 %

120 %

125 %

Table3. mA step Value

STEP

Value(for each span setting)

4 to 20mA 0 to 20mA

4.000mA

8.000mA

12.000mA

16.000mA

20.000mA

0.000mA

5.000mA

10.000mA

15.000mA

20.000mA

24.000mA

24.000mA

34

35

Auto Ramping the mA Output

Auto ramping gives the ability to continuously apply a varying current stimulus from the meter to a transmitter, while hands remain free to test the response of the transmitter. Select either sourcing or simulating by choosing the SOURCE or SIMULATE jacks.

When the rotary function switch is in the OUTPUT mA position, and the output jacks are connected to an appropriate load, the meter produces a continuously repeating 0 % - 100 % - 0 % ramp in a choice of four ramp waveforms:

0 % - 100 % - 0 % 40-second smooth ramp

0 % - 100 % - 0 % 15-second smooth ramp

0 % - 100 % - 0 % Stair-step ramp in 25 % steps, pausing 5 seconds at each step. Steps are listed in Table 3.

The ramp times are not adjustable.

n. Loop Power Supply Mode

The Loop Power Supply Mode can be used for powering up a process instrument (transmitter). While in Loop Power

Mode, the meter acts like a battery. The process instrument regulates the current.

36

37 o. RS-232C interface

Demonstration software is provided with the DMM. The program is written for windows using MFC. For you own applications, consult the following;

1. Specification

Baud rate 19200 baud

Parity none

Data length 8 bit

Stop bit 1 bit

2. Transmitte format(DMM to PC)

Output and Input of all data are ASCII String.

Send Format( DMM to PC )

“fun b sign value b unit b cr lf” b

Value unit cr lf blank(0x20)

Measured value(ASCII string)

Unit(ASCII string)

Carriage Return

Line Feed

Function code

Function

DCmV

DCV

ACV

Diode

Ohm/Continuity

Capacitance

Frequency uA mA

A

Adaptor

Current out

Function code

DCV

DCV

ACV

DIO

OHM/BEP

CAP

FRQ

DCA/ACA

DCA/ACA

DCA/ACA

AC/DC1,2,3 TMP mA 0, A, B, C, 2

Unit

mV

V

V

V

Ohm/ Kohm/ Mohm uF/mF

Hz/ Khz uA mA

A

A / tC/ tF mA

Push button code

Push key

RANGE

REC

REL

COMP

HOLD

Code

RANGE AUTO/ RANGE MANUAL

REC ON/ REC AVG/ REC OFF

REL ON ref2/ REL OFF

COMP ON ref1 ref2/ COMP OFF

HOLD ON/ HOLD OFF

★ ) ref1 is the sub display on the left lower part of the LCD, ref2 is the sub display value on the right lower part of the

LCD.

mean the DCV function. The real value is 12.345mV. The shows 10.000mV and the right lower part of the LCD shows 11.000mV.

“2 DCV -1.2345 mV crlf”

“2 mA 0 + 04.000mA + 000.00 crlf” the value being displayed on the Main display.

“3 REL ON crlf”

: Indicates the REL % key is being pressed.

Receive Format( PC to DMM )

REL ON ref2

Activates REL %.(If the value is input on ref2, it sets with value)

REL OFF

Deactivates REL %

REC ON

REC AVG

Activates the record mode to the normal mode.

Activates the record mode to the AVG mode.

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REC OFF

Deactivates Record mode

COMP ON ref1 ref2

Activates COMP.(If value is input on the meter uses these as high & low limit of compare)

COMP OFF

Deactivates COMP mode

HOLD ON

HOLD OFF

Activates HOLD mode

SKEY f

DMM STOP

DMM GO

Deactivates HOLD mode

Indicates status of the function f is REL,

REC, COMP, HOLD, RANGE.

Set the RS-232C to stop mode.

Set the RS-232C to start mode.

DMM SINGLE

Output only one single data( one string ) on the DMM(you can keep getting data by using this command)

E. ACCESSORIES

Standard Accessories

9 Volt Alkaline Battery

Fuse 0.5A

Fuse 10A

Test lead

Rubber boot

Optional Accessories

Accessories

Demonstration Software

Deluxe Test lead set

IEC 1010 Deluxe test lead kit

Temperature Adaptor

Current Adaptor 10/60A



Carrying case

Part NO.

Part NO.

A301

A254

A256

A296

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F. MAINTENANCE

1.

Battery Replacement:

The DMM 196 will display AT when the 9 volt battery needs replacement. Battery replaced as following: a. Disconnect and remove all test leads from live circuit and from DMM 196.

b. Remove DMM 196 from protective boot.

c. Remove the three screws from battery cover of back d. Remove old batteries and replace with new batteries.

e. Reassemble instrument in reverse order from above.

2.

Fuse Replacement:

Both the A and mA/uA input jacks are fuse protected. Use only Fast blow, 600V fuses with correct current ratings. Failure to do so will void all

Warranties. If either do not function, replace as Following: a. Disconnect and remove all test leads from live circuit and from DMM 196.

b. Remove DMM 196 from protective boot.

c. Remove the three screws from battery cover of back d. Remove old fuse(s) and replace it with new fuse(s).

e. Reassemble instrument in reverse order from above.

f. Fuse must be changed by replacement in service center.

3.

Cleaning your DMM 196

Use a mild detergent and a slightly damp cloth to clean the surfaces of the DMM 196.

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G. TROUBLE SHOOTING GUIDE

Problem

Does not power up

Probable Causes

• Dead or defective battery

• Broken wire from battery snap to PCB

Won’t display current readings

• Open fuse

• Open test lead

• Improperly connected to circuit under test

All functions except ohms read high

• Very weak battery that will not turn on the low battery indicator on the LCD

ACV do not read

• Very weak battery that will not turn on the low battery indicator on the LCD

WARRANTY

Please refer to product warranty card for warranty statement.

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Test Products International, Inc.

9615 SW Allen Blvd., Ste. 104

Beaverton, OR USA 97005

503-520-9197 • Fax: 503-520-1225 •[email protected]

Test Products International, Ltd.

2 Newcourt Business Park

Perry Road Harlow, Essex CM18 7PR England

Tel: 01279 439647 • Fax: 01279 450553

L190 • 1/26/04 copyright ⓒ 2004 Test Products International, Inc.

196 Specifications

±0.05

% Basic DCV Accuracy

Function

DCV

Range

50mV

500mV

5V

50V

500V

1000V

Resolution

0.001mV

0.01mV

0.0001V

0.001V

0.01V

0.1V

ACV

DCA/ACA

OHM

Current out

Frequency

5V

50V

500V

750V

5mA

50mA

500mA

1A

500Ω

5kΩ

50kΩ

500kΩ

5MΩ

50MΩ

0~24mA

500Hz

5KHz

50KHz

500KHz

0.0001V

0.001V

0.01V

0.1V

0.0001mA

0.001mA

0.01mA

0.0001A

0.1Ω

0.0001kΩ

0.001kΩ

0.01kΩ

0.0001MΩ

0.001MΩ

0.001mA

0.01Hz

0.0001KHz

0.001KHz

0.01KHz

Diode

Test Voltage

Approx. 3V

Test Voltage

Continuity

Approx. 3V

Test Current

Approx. 1mA

Threshold

30 Digits

See pages 10~13 for detail specifications.

Test Products International, Inc.

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