TRIPLETT MM750B High Percision Benchtop Digital Multimeter User Manual

TRIPLETT MM750B High Precision Benchtop Digital Multimeter

Product Information

Specifications:

• Brand: Triplett
• Model: MM750B
• Display: Dual display
• Count: 200000
• Functions: High precision, multi-function, full-automatic measurements

Product Usage Instructions

Basic Measurements:
The Triplett MM750B is designed for basic measurements including DC voltage, DC current, and resistance.

Mathematical Functions:
The multimeter also provides additional mathematical functions such as maximum, minimum, average, standard deviation, relative measurement, bar chart, histogram, trend chart, dB/ dBm, Pass/Fail, etc.

Humanization Design:
The MM750B features an easy-operating user interface with a help system. It supports both Chinese & English menu options, dual display, and allows for U-disk and local storage.

Applications:
This digital multimeter is suitable for various applications including research and education, research and development, detection and maintenance, calibration, and automated testing.

FAQ

Q: What are the main design features of the MM750B?
A: The design features include a histogram, trend chart, bar chart mathematical statistics function, dual display, hold function, dBm function, and configuration interface.

Q: What are the DC characteristics of the MM750B?
A: The DC voltage ranges from 200.000mV to 1000.00V, DC current ranges from 200.000A to 10.0000A, and resistance ranges from 200.0000 to 20.0000k.

The Triplett MM750B is a 200000 count benchtop digital multimeter with high precision, multi-function and full-automatic measurements for various requirements.

Basic measurements measurements

• DC voltage measurement: 200mV, 2V, 20V, 200V, 1000V
• DC current measurement: 200μA, 2mA, 20mA, 200mA, 2A, 10A
• AC voltage measurement: RMS 20 0mV, 2V, 20V, 200V, 750V
• AC current measurement: RMS 2mA, 20mA, 200mA, 2A, 10A
• Resistance measurement: (2-wire, 4 4-wire) 200Ω, 2kΩ, 20kΩ, 200kΩ, 2MΩ, 10MΩ, 100MΩ
• Capacitance measurement: 2nF, 20nF, 200nF, 2μF, 20μF, 200μF, 2mF
• Continuity test: fixed 2kΩ
• Dio de test: 0V-4V
• Frequency measurement: 20Hz 20Hz-1MHz
• Cycle measurement: 1μs-0.05s

Temperature measurement: thermocouple and thermal resistance sensor supported

Mathematical functions

Maximum, minimum, average, standard deviation, relative measurement, bar chart, histogram, trend chart, dB/ dBm, Pass/Fail, etc.

Humanization design

With an easy-operating user interface and help system, Chinese & English menu, dual display and both U-disk and local storage supported.

Applications

• Research and Education
• Research and development
• Detection and maintenance
• Calibration
• Automated testing

Features

• 4.3-inch 480*272 TFT-LCD
• 200000 count resolution
• Up to 5k reading/s reading speed
• True-RMS AC voltage/current measurement
• 1GB NAND Flash storage, mass storage system and test data
• Built-in thermocouple cold junction compensation
• Supports standard SCP| remote control command and software of upper computer, the latest mainstream multimeter command set compatible
• Dual display, Chinese & English menu and built-in help system
• Configuration interfaces: USB Device, USB Host, LAN, GPIB, RS-232C
• Settings and the measured data can be recorded and read by VXI11, USBTMC and U-disk conveniently

Design Features
Histogram, trend chart, bar chart, mathematical statistics function, dual display, hold function, dBm function, configuration interface

Specification

DC Characteristics Accuracy ±(%reading ＋ %range) [1]

Function

| ****

Range [2]

| ****

Test current or load voltage

| ****

Input impedance

| ****

90-day accuracy 23°C±5°C

| ****

1-year accuracy 23°C±5°C

| Temperature coefficient 0°C -18°C

28°C -50°C

DC voltage (DCV)

| ****

200.000mV

|  | 10MΩ

or >10GΩ

| ****

0.008+0.004

| ****

0.01+0.004

| ****

0.0015+0.0005

2.00000V

|  | 10MΩ

or >10GΩ

| ****

0.008+0.003

| ****

0.01+0.003

| ****

0.0010+0.0005

20.0000V

|  | 10MΩ

or >10GΩ

| ****

0.008+0.004

| ****

0.01+0.004

| ****

0.0020+0.0005

200.000V|  | 10MΩ| 0.012+0.003| 0.015+0.003| 0.0015+0.0005
1000.00V[3]|  | 10MΩ| 0.012+0.003| 0.015+0.003| 0.0015+0.0005

DC current (DCI)

| 200.000μA| <30mV|  | 0.050+0.005| 0.055+0.005| 0.003+0.001
2.00000mA| <0.3V|  | 0.050+0.005| 0.055+0.005| 0.002+0.001
20.0000mA| <30mV|  | 0.070+0.020| 0.095+0.020| 0.008+0.001
200.000mA| <0.3V|  | 0.060+0.008| 0.070+0.008| 0.005+0.001
2.00000A| <0.1V|  | 0.150+0.020| 0.170+0.020| 0.013+0.001
10.0000A[4]| <0.3V|  | 0.200+0.010| 0.250+0.010| 0.008+0.001

Resistance5

| 200.0000Ω| 1mA|  | 0.012+0.005| 0.030+0.005| 0.003+0.0006
2.00000kΩ| 1mA|  | 0.012+0.003| 0.020+0.003| 0.003+0.0005
20.0000kΩ| 100μA|  | 0.012+0.003| 0.020+0.003| 0.003+0.0005
 | 200.000kΩ| 10μA|  | 0.012+0.004| 0.020+0.004| 0.003+0.0005
---|---|---|---|---|---|---
2.00000MΩ| 1μA|  | 0.020+0.004| 0.040+0.004| 0.004+0.0005
10.0000MΩ[6]| 500nA|  | 0.100+0.004| 0.250+0.004| 0.010+0.0005

100.000MΩ

| 500nA ‖

10MΩ

|  | ****

0.800+0.004

| ****

1.75+0.004

| ****

0.200+0.0005

Diode test

| 0~2.0000V[7]| 1mA|  | 0.05+0.03| 0.05+0.03| 0.005+0.005
2.0000V~4.0000V| 1mA|  | 0.07+0.03| 0.15+0.03| 0.005+0.005
Continuity test| 2000Ω| 1mA|  | 0.05+0.03| 0.05+0.03| 0.005+0.005
Note : [1] The index is obtained after preheating for half an hour, uses slow speed measurement and the calibration temperature is 18°C~28°C. [2] All scales except DCV 1000V and DCI 10A are allowed to exceed the range by 20%. [3] Beyond ±500 VDC, error of 0.002 will be added every 1V exceeds. [4] For continuous current＞DC 7A or AC rms7A, it should be disconnected for 30s after connected 20s. [5] For 4-wire resistance measurement or 2-wire mode with relative operation; ±0.2Ω additional error will be added in 2-wire resistance measurement without relative operation. [6] The humidity requirement in scales of 10MΩ and 100MΩ is <60%. [7] The accuracy is only for voltage measurement of input terminal, the typical value of test current is 1mA. The current source change will cause some variation in the voltage drop on the diode junction.
AC Characteristics Accuracy ±(%reading ＋ %range) [1]

Function

| ****

Range [2]

| ****

Range of frequency

| 90-day accuracy

23°C±5°C

| 1-year accuracy

23°C±5°C

| Temperature coefficient 0°C -18°C

28°C -50°C

True RMS AC voltage[3] (ACV)

| ****

200.000 mV

| 20Hz~45Hz| 1.5+0.10| 1.5+0.10| 0.01+0.005
45Hz~20kHz| 0.19+0.05| 0.2+0.05| 0.01+0.005
20kHz~50kHz| 1.0+0.05| 1.0+0.05| 0.01+0.005
50kHz~100kHz| 3.0+0.05| 3.0+0.05| 0.05+0.010

2..00000 V

| 20Hz~45Hz| 1.5+0.10| 1.5+0.10| 0.01+0.005
45Hz~20kHz| 0.19+0.05| 0.2+0.05| 0.01+0.005
20kHz~50kHz| 1.0+0.05| 1.0+0.05| 0.01+0.005
50kHz~100kHz| 3.0+0.05| 3.0+0.05| 0.05+0.010

20..0000 V

| 20Hz~45Hz| 1.5+0.10| 1.5+0.10| 0.01+0.005
45Hz~20kHz| 0.19+0.05| 0.2+0.05| 0.01+0.005
20kHz~50kHz| 1.0+0.05| 1.0+0.05| 0.01+0.005
50kHz~100kHz| 3.0+0.05| 3.0+0.05| 0.05+0.010

200..000 V

| 20Hz~45Hz| 1.5+0.10| 1.5+0.10| 0.01+0.005
45Hz~20kHz| 0.19+0.05| 0.2+0.05| 0.01+0.005
20kHz~50kHz| 1.0+0.05| 1.0+0.05| 0.01+0.005
50kHz~100kHz| 3.0+0.05| 3.0+0.05| 0.05+0.010
750..000 V[4]| 20Hz~45Hz| 1.5+0.10| 1.5+0.10| 0.01+0.005
 |  | 45Hz~20kHz| 0.19+0.05| 0.2+0.05| 0.01+0.005
---|---|---|---|---|---
20kHz~50kHz| 1.0+0.05| 1.0+0.05| 0.01+0.005
50kHz~100kHz| 3.0+0.05| 3.0+0.05| 0.05+0.010

True RMS AC current[5] (ACI)

| ****

2.00000 mA

| 20Hz~45Hz| 1.5+0.10| 1.5+0.10| 0.015+0.015
45Hz~2kHz| 0.5+0.10| 0.5+0.10| 0.015+0.006
2kHz~10kHz| 2.5+0.20| 2.5+0.20| 0.015+0.006

20.0000 mA

| 20Hz~45Hz| 1.5+0.10| 1.5+0.10| 0.015+0.005
45Hz~2kHz| 0.5+0.10| 0.5+0.10| 0.015+0.005
2kHz~10kHz| 2.5+0.20| 2.5+0.20| 0.015+0.005

200.000 mA

| 20Hz~45Hz| 1.5+0.10| 1.5+0.10| 0.015+0.005
45Hz~2kHz| 0.3+0.10| 0.3+0.10| 0.015+0.005
2kHz~10kHz| 2.5+0.20| 2.5+0.20| 0.015+0.005

2.00000 A

| 20Hz~45Hz| 1.5+0.20| 1.5+0.20| 0.015+0.005
45Hz~2kHz| 0.5+0.20| 0.5+0.20| 0.015+0.005
2kHz~10kHz| 2.5+0.20| 2.5+0.20| 0.015+0.005

10.0000 A[6]

| 20Hz~45Hz| 1.5+0.15| 1.5+0.15| 0.015+0.005
45Hz~2kHz| 0.5+0.15| 0.5+0.15| 0.015+0.005
2kHz~10kHz| 2.5+0.20| 2.5+0.20| 0.015+0.005
Additional crest factor error (Non-sine wave)[7]
Crest coefficient| Error(%range)
1-2| 0.05
2-3| 0.3
Note: [1] The index is obtained after preheating for half an hour, uses slow speed measurement and the calibration temperature is 18°C~28°C. [2] All scales except ACV 750V and ACI 10A are allowed to exceed the range by 20%. [3] The index is obtained under the sinusoidal signal with an amplitude of >5%; When the input is within 1%~5% and the frequency is <50kHz, the additional error, 0.1% of range is added. [4] Beyond 400VAC, error of 0.025V will be added every 1V exceeds. [5] The index is obtained under the sinusoidal signal with amplitude of >5%; When the input is within 1%~5%, the additional error, 0.1% of range is added. [6] For continuous current＞DC 7V or AC rms7A, it should be disconnected for 30s after connected 20s. [7] when the frequency is＜100Hz
Frequency and Cycle Characteristics Accuracy ±(%reading)

Features

| ****

Range

| ****

Range of frequency

| ****

90-day accuracy 23°C±5°C

| ****

1-year accuracy 23°C±5°C

| Temperature coefficient 0°C -18°C

28°C -50°C

Frequency

and cycle

| ****

200mV~750V[2]

| 20Hz~2kHz| 0.01+0.003| 0.01+0.003| 0.002+0.001
2kHz~20kHz| 0.01+0.003| 0.01+0.003| 0.002+0.001
 |  | 20kHz~200kHz| 0.01+0.003| 0.01+0.003| 0.002+0.001
---|---|---|---|---|---
200kHz~1MHz| 0.01+0.005| 0.01+0.006| 0.002+0.002
Note: [1] The index is obtained after preheating for half an hour. [2] Besides especially marked, when the frequency is＜100kHz, the index is AC input voltage in 15%~120% scale, and when the frequency is＞100kHz, the index is applicable to scale of 30%~120%. The 750V scale is limited in 750Vrms, and the accuracy in 200mV scale is multiplied the % reading error by 10.
Capacitance Characteristics Accuracy ±(%reading ＋ %range) [1]

Features

| ****

Range

| ****

Maximum test current

| ****

90-day accuracy 23°C±5°C

| 1-year accuracy

23°C±5°C

| Temperature coefficient 0°C -18°C

28°C -50°C

Capacitance

[2]

| 2.000nF| 0.5μA| 2.8+1.0| 3+1.0| 0.08+0.002
20.00nF| 1μA| 1+0.5| 1+0.5| 0.02+0.001
200.0nF| 10μA| 1+0.5| 1+0.5| 0.02+0.001
2..000μF| 100μA| 1+0.5| 1+0.5| 0.02+0.001
20..00μF| 1mA| 1+0.5| 1+0.5| 0.02+0.001
200.0μF| 1mA| 1+0.5| 1+0.5| 0.02+0.001
2.000mF| 1mA| 2+0.5| 2+0.5| 0.02+0.001
Note: [1] The index is obtained after preheating for half an hour. [2] The parameter is applicable to capacitance between 1%~120% in 2nF scale. In other scales, capacitance is between 10%~120%.
Temperature Characteristics Accuracy ±(%reading ＋ %range) [1]

Function

| ****

Type of probe

| ****

Model of probe

| ****

Operating temperature

| 1-year accuracy

23°C±5°C

| Temperature coefficient 0°C -18°C

28°C -50°C

Temperature

| RTD[2]| α=0.00385| -200°C~660°C| 0.16°C| 0.008+0.002

Thermocouple[3]

| B| 0°C~1820°C| 0.76°C| 0.14°C
E| -270°C~1000°C| 0.5°C| 0.02°C
J| -210°C~1200°C| 0.5°C| 0.02°C
K| -270°C~1370°C| 0.5°C| 0.03°C
N| -270°C~1300°C| 0.5°C| 0.04°C
R| -50°C~1760°C| 0.5°C| 0.09°C
S| -50°C~1760°C| 0.6°C| 0.11°C
T| -270°C~400°C| 0.5°C| 0.03°C
Note: [1] The index is obtained after preheating for half an hour and the probe error is not contained.

• The index is suitable for 2-wire/4-wire relative
• Built-in cold junction compensation is near the rubber tip of test leads and its measuring error is ±2°C.

Measuring methods and other features

DC voltage
Input

resistance

| 10MΩ or＞10GΩ for scales of 200mV, 2V and 20V
10MΩ ±2% for scale of 20V, 200V and 1000V
Input bias

current

| ＜30 pA, 25°C test
Input

protection

| ****

1000 V for all ranges

Common mode

rejection ratio

| ****

120dB (maximum ±500 VDC for 1kΩ balancing resistance of LO test lead)

Normal mode

rejection ratio

| ****

60 dB (slow reading speed)

Resistance
Measuring

method

| ****

4-wire/2-wire resistance selectable

Input

protection

| ****

1000 V for all ranges

DC current

Current diverter

| Sample resistance 100Ω in 200uA and 2mA scale
Sample resistance 1Ω in 20mA and 200mA scale
Sample resistance 8mΩ in 2A and 10A scale
Input

protection

| 250mA, 250V replaceable fast fuse on rear panel
Internal 10A, 250V slow fuse
Continuity/diode test
Measuring

method

| ****

Use constant flow source of 1mA ± 5% measure resistance or voltage

Buzzer| Yes
Continuity

threshold

| ****

Adjustable

Input

protection

| ****

1000V

True RMS AC voltage
Measuring

method

| ****

AC coupling true RMS measurement, maximum 1000V offset in arbitrary range

Crest factor| Crest factor ≤3 in full range
Input

impedance

| 1MΩ±2% in all ranges with＜100 pF in parallel
---|---
AC filter

bandwidth

| ****

20Hz~100kHz

Common

mode rejection ratio

| ****

60 dB (for 1kΩ balancing resistance of LO test lead and＜60Hz, maximum ±500 VDC)

True RMS AC current
Measuring

method

| Coupling DC to shunt resistor, and coupling AC to true RMS measurement ( measure input AC

component)

Crest factor| Crest factor ≤3 in full range
Maximum

input

| RMS current＜10 A with DC component
Shunt resistor| 0.008 Ω in 2A and 10A scale, 1Ω in 20mA and 200mA scale, 100Ω in 200μA and 2mA scale
Input

protection

| 250mA, 250V replaceable fast fuse on rear panel
Inter 10A, 250V slow fuse
Cycle and frequency
Measuring

method

| ****

Measure the time of signal cycle number and then calculate the frequency

Notice| Error will be introduced for low voltage and low frequency signal by all frequency meter
Capacitance measurement
Measuring

method

| ****

Charge the capacitance by constant current, and measure the average speed of voltage rising

Connecting

method

| ****

2-wire

Input

protection

| ****

All ranges 1000 V

Arbitrary sensor measurement
Measuring

method

| Thermocouple, DCV, DCI, Ω(2-wire/4-wire), frequency output type sensor and built-in thermocouple cold

junction compensation supported

Output

polarity

| ****

Positive/negative selectable

Others| Preset conversions for ITS-90, Pt100 and Pt385 of B, E, J, K, N, R, S, T type thermocouple
Frequency response
True RMS

measurement

| ****

100kHz

Sampling and trigger
Maximum

measuring speed

| ****

5000rdgs/s (2.5 reading/s; 10 reading/s; 5k reading/s)

External trigger input

| Input level| TTL compatible
Trigger

condition

| ****

Rising edge/falling edge optional

Input

impedance

| ＞20kΩ /400pF (DC coupling)
Minimum pulse

width

| ****

500μs

VMC output

| Level| TTL compatible (input ≥1kΩ load)
Output polarity| Positive/negative selectable
Output

impedance

| ****

200Ω (typical)

History recording
Volatile

memory

| ****

10k reading record

Non-volatile memory

| 1GB NAND Flash storage, mass storage system and test data
6 sets of preset value configuration
External U-disk expansion is supported
Mathematical functions
Mathematical

operations

| Pass/Fail, Relative, min/max/average, standard deviation, dBm, dB, Hold, histogram, trend chart, bar

chart

Interfaces
Interfaces

type

| ****

USB Host, USB Device, LAN , RS-232C, GPIB(optional)

General characteristic

Power supply:

• AC 90V ~ 110V, 45 ~ 440Hz
• AC 110V ~ 132V, 45 ~ 440Hz
• AC 200V ~ 240V, 45 ~ 66Hz
• AC 216V ~ 264V, 45 ~ 66Hz
• Power dissipation: MAX 20W

Mechanical Features

• Size: 260mm116mm332mm
• Weight: 4.4kg
• Color: off white and grey

Other features

• Accurate operating environment: 0°C~28°C<90%; 28°C~40°C<75%; 40°C~55°C<50% (no condensation)
• Storage environment: -20°C~70°C, <95%; the instrument needs to run continuously for at least 7 days after high humidity storage.
• Altitude: ≤2000 m
• Vibration: MIL-T-28800E, category Ill, class 5 (only for sine wave)
• Electromagnetic compatibility: complies with low-voltage command (2004/108/EC) and standard EN61326-1:2013.
• Safety: complies with low-voltage command (2006/95/EC), and standard EN61010 – 1:2010 (to be confirmed)
• Remote interface 10 / 100Mbit LAN, USB Device, USB Host, RS-232C
• Programming language: The latest mainstream multimeter SCPI command set compatible
• Preheat: 30 minutes

Package

• Three-core power line————————–1
• Test leads——————————————1 pair
• USB connecting line—————————–1
• RS232 connecting line————————–1
• Upper computer software———————1 set

Warranty

Triplett / Jewell Instruments extends the following warranty to the original purchaser of these goods for use. Triplett warrants to the original purchaser for use that the products sold by it will be free from defects in workmanship and material for a period of (2) two years from the date of purchase. This warranty does not apply to any of our products which have been repaired or altered by unauthorized persons in any way or purchased from unauthorized distributors so as, in our sole judgment, to injure their stability or reliability, or which have been subject to misuse, abuse, misapplication, negligence, accident or which have had the serial numbers altered, defaced, or removed. Accessories, including batteries are not covered by this warranty.

Copyright O 2023 Triplett
www.triplett.com

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