Maynuo Electronic M88 Series User manual

USER’S MANUAL
Programmable DC power supplier
Models M88XX Series
(Including M8811/M8812/M8813/M8851/M8852/M8853/
M8871/M8872/M8873/M8874)

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Content
Chapter 1 Introduction .......................................................................................................1
Chapter2 Technical Specifications....................................................................................2
2.1 Main Technical Specification ..............................................................................................................2
2.2 Supplemental Characteristics.............................................................................................................6
2.3 M88XX Power Suppliers Dimension..................................................................................................6
Chapter 3 Quick Start .........................................................................................................9
3.1 Front-panel and Rear-panel...............................................................................................................9
3.2 Preliminary Checkout.......................................................................................................................10
3.3 If the Power supplier Does Not Turn On..........................................................................................10
3.4 How to Adjust the Carrying Handle..................................................................................................11
3.5 How to Rackmount the Instrument...................................................................................................12
Chapter 4 Panel Operation...............................................................................................13
4.1 Key Layout........................................................................................................................................13
4.2 Front-panel Operation Overview......................................................................................................14
4.3 Constant Voltage Operation.............................................................................................................14
4.4 Constant Current Operation.............................................................................................................15
4.5 Saving and Recalling Operation.......................................................................................................15
4.6 Menu Operation................................................................................................................................15
4.6.1 Menu Description.......................................................................................................................15
4.6.2 Menu Function...........................................................................................................................18
4.7 Output On-Off Operation..................................................................................................................23
4.8 Remote Measurement Function.......................................................................................................23
4.9 Milliohmmeter Function....................................................................................................................24
4.10 Voltmeter Function .........................................................................................................................25
Chapter 5 Remote Operation Mode.................................................................................26
5.1 M-131Communication Cable............................................................................................................26
5.2．Communication between Power Supplier and PC........................................................................26
Chapter 6 SCPI Communication Protocal....................................................................28
6.1 Communication command introduction............................................................................................28
6.2 Commomly used relevant command description.............................................................................28
6.2.1 Basic command (IEEE-488.2 Common Command Set)...........................................................28
6.2.2 Command specified by M8800 software...................................................................................29
6.2.3 Measurement Command...........................................................................................................31

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6.2.4 Setting Command......................................................................................................................31
6.2.5 List Operation（LIST）Related Command...............................................................................34
Quick Reference................................................................................................................39

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Chapter 1 Introduction
M88XX Series power suppliers are high performance single-output programmable DC power
suppliers with communication interface, possessing the character of fast rise time speed (The rise speed
of M8811 power supplier can be less than 10mS and that of M8851 can be less than 20mS) The
combination of bench-top and system features in these power suppliers provides versatile solutions for
your design and test requirements. The M88XX Series can not only be programmed through the
keyboard on the panel, but also be functioned as voltmeter and milliohmmeter, which will bring great
convenience to the users. As a regeneration product of ordinary programmable power suppliers, M88XX
Series power suppliers are more cost-effective.
M88XX Series power suppliers’features
• Low Periodic And Random Deviation (PARD) and noise
• High resolution and accuracy (0.1mV/0.01mA)
•Installing a high-accuracy 5 1/2 voltmeter and milliohmmeter
•Supporting high-accuracy and dynamic programming output
• High –luminance VFD screen and two lines& four ways display
• Smart fan will be automatically initiated according to the temperature.
• Supporting remote voltage compensation and multidata storage
• Supporting external trigger input and output.
• Power-on-self-test，software calibration and standard designed instrument stand
•Supporting TTL level Serial communication interface

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Chapter2 Technical Specifications
2.1 Main Technical Specification
M881X Series power suppliers technical specification table
Model
M8811
M8812
M8813
Input Rating
Voltage
0-30V
0-75V
0-150V
Current
0-5A
0-2A
0-1A
Load Regulation
Voltage
＜0.01%+0.5mV
＜0.01%+0.5mV
＜0.01%+0.5mV
Current
＜0.01%+0.1mA
＜0.01%+0.1mA
＜0.01%+0.1mA
Setting Value Resolution
Voltage
0.5mV
1mV
2mV
Current
0.1mA
0.05mA
0.01mA
Readback Value Resolution
Voltage
0.1mV
0.1mV
1mV
Current
0.01mA
0.01mA
0.01mA
Setting Value Accuracy
Voltage
0.01%+2mV
0.01%+5mV
0.01%+15mV
Current
0.05%+1mA
0.05%+0.5mA
0.05%+0.1mA
Readback Value Accuracy
Voltage
0.02%+5mV
0.02%+12mV
0.02%+25mV
Current
0.1%+5mA
0.05%+2mA
0.05%+1mA
Periodic And Random Deviation
Voltage
3mvp-p
5mvp-p
10mvp-p
Current
2mA rms
1mA rms
0.5mA rms
Voltmeter Accuracy
0-12VAccuracy: 0.02%+2mV; 0-50V Accuracy: 0.02%+5mV
Milliohmmeter Accuracy
10W. 0-1000mΩ Accuracy: 0.2%+3 mΩ; 1000-10000 mΩ
Accuracy: 0.2%+6 mΩ
Working Condition
0-40℃; 0-90% RH
Power Required
AC 110V/220V+10%; 50/60 HZ
Weight
9Kg
Dimension
108X214X365mm

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M885X Series power suppliers technical specification table
Model
M8851
M8852
M8853
Input Rating
0-6V
0-30V
0-75V
0-60A
0-20A
0-8A
Load Regulation
＜0.01%+1mV
＜0.01%+1mV
＜0.01%+1mV
＜0.01%+0.1mA
＜0.01%+0.1mA
＜0.01%+0.1mA
Setting Value Resolution
0.1mV
0.5mV
1mV
1mA
0.5mA
0.2mA
Readback Value Resolution
0.1mV
0.1mV
0.1mV
0.1mA
0.1mA
0.1mA
Setting Value Accuracy
0.01%+1mV
0.01%+5mV
0.01%+10mV
0.05%+6mA
0.05%+2mA
0.05%+1mA
Readback Value Accuracy
0.02%+2mV
0.02%+5mV
0.02%+12mV
0.05%+30mA
0.05%+15mA
0.05%+8mA
Periodic And Random Deviation
3mvp-p
5mvp-p
7mvp-p
15mA rms
7mA rms
4mA rms
Voltmeter Accuracy
0-12V Accuracy: 0.02%+2mV; 0-50V Accuracy:
0.02%+5mV
Milliohmmeter Accuracy
10W. 0-1000mΩ Accuracy: 0.2%+3 mΩ; 1000-10000
mΩ Accuracy: 0.2%+6 mΩ
Working Condition
0-40℃; 0-90% RH
Power Required
AC 120V/230V+10%; 50/60 HZ
Weight
28Kg
Dimension
428X103.5X453.5mm

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M887X Series power suppliers technical specification table
Model
M8871
Input Rating
0-15V, 0-60A
Load Regulation
<0.01%+1mV, <0.01%+0.1mA
Setting Value Resolution
0.1mV, 1mA
Readback Value Resolution
0.1mV, 0.05%+6mA
Readback Value Accuracy
0.03%+5mV, 0.05%+45mA
Ripple
4mvp-p, 10mA rms
Voltmeter Accuracy
0-12V Accuracy: 0.02%+2mV; 0-50V Accuracy:
0.02%+5mV
Milliohmmeter Accuracy
10W 0-1000mAuracy:0.2%+3mΩ;1000-10000mΩ
Acuracy:0.2%+6 mΩ
Working Condition
0~40oC; 0~90% RH
Power Required
AC 100V/120V/220V+10%; 50/60 HZ
Weight
38Kg
Dimension
583mm (W)*180mm(H)*445mm(D)
Model
M8872
Input Rating
0-30V, 0-35A
Load Regulation
<0.01%+1mV, <0.01%+0.1mA
Setting Value Resolution
0.5mV, 0.5mA
Readback Value Resolution
0.1mV, 0.05%+2mA
Readback Value Accuracy
0.03%+5mV, 0.05%+25mA
Ripple
5mvp-p, 5mA rms
Voltmeter Accuracy
0-12V Accuracy: 0.02%+2mV; 0-50V Accuracy:
0.02%+5mV
Milliohmmeter Accuracy
10W 0-1000 mΩAccuracy:0.2%+3 mΩ; 1000-10000mΩ
Accuracy:0.2%+6 mΩ
Working Condition
0~40oC; 0~90% RH
Power Required
AC 100V/120V/220V+10%; 50/60 HZ
Weight
38Kg
Dimension
583mm (W)*180mm(H)*445mm(D)

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Model
M8873
Input Rating
0-75V, 0-15A
Load Regulation
<0.01%+1mV, <0.01%+0.1mA
Setting Value Resolution
2mV, 0.2mA
Readback Value Resolution
0.1mV, 0.05%+1mA
Readback Value Accuracy
0.03%+15mV, 0.05%+15mA
Ripple
6mvp-p, 3mA rms
Voltmeter Accuracy
0-12V Accuracy: 0.02%+2mV; 0-50V Accuracy:
0.02%+5mV
Milliohmmeter Accuracy
10W 0-1000 mΩAccuracy:0.2%+3 mΩ;1000-10000mΩ
Accuracy:0.2%+6 mΩ
Working Condition
0~40oC; 0~90% RH
Power Required
AC 100V/120V/220V+10%; 50/60 HZ
Weight
38Kg
Dimension
583mm (W)*180mm(H)*445mm(D)
Model
M8874
Input Rating
0-100V, 0-11A
Load Regulation
<0.01%+1mV, <0.01%+0.1mA
Setting Value Resolution
2mV, 0.2mA
Readback Value Resolution
1mV, 0.05%+1mA
Readback Value Accuracy
0.03%+25mV, 0.05%+12mA
Ripple
8mvp-p, 2.5mA rms
Voltmeter Accuracy
0-12V Accuracy: 0.02%+2mV; 0-50V Accuracy:
0.02%+5mV
Milliohmmeter Accuracy
10W 0-1000 mΩAccuracy:0.2%+3 mΩ;1000-10000mΩ
Accuracy:0.2%+6 mΩ
Working Condition
0~40oC; 0~90% RH
Power Required
AC 100V/120V/220V+10%; 50/60 HZ
Weight
38Kg
Dimension
583mm (W)*180mm(H)*445mm(D)

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2.2 Supplemental Characteristics
State Storage Memory: 50 user-configurable stored states
Recommended Calibration Interval: Once/ Year
AC Input Ratings (selectable via switch on the rear panel)
Option 01: 220VAC ±10%, 47 to 63 Hz
Option.02: 110 VAC ±10%, 47 to 63 Hz
Cooling: forced cooling
Operating Temperature：0 to 40 °C
Storage Temperature：-20 to 70 °C.
Environmental Conditions：Designed for indoor use with pollution degree 2 environment. Designed to
operate at maximum relative humidity of 95%.
2.3 M88XX Power Suppliers Dimension
The dimension of M881X Series is 256mmW x 108mm H x 365mm L. Please refer to the following
figure：
Figure 2.1: M881X Power Suppliers Dimension Figure

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The dimension of M885X Series is 428mmW×103.5mmH×453.5mmL，Please refer to the following
figure：
Figure 2.2: M885X Power Suppliers Dimension Figur

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The dimension of M887X Series is 482mmW×184.5mmH×583.5mmD. Please refer to the following
figure：
Figure 2.3: M887X Power Suppliers Dimension Figur

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Chapter 3 Quick Start
This chapter mainly focuses on the brief introduction of the surface appearance and basic functions
of M88XX Series power suppliers so that both experienced and inexperienced users can be acquainted
with the new products quickly. Meanwhile, the chapter also clarifies some preliminary checkout that
should be made prior to operation to make sure the normal running of the products.
3.1 Front-panel and Rear-panel
The front panel layout of M881X Series power supplier is as follows:
Picture 3.1: The Front Panel of M881X Series Power Suppliers
The upper half is black VFD display screen and knob
The bottom half, left side to right side, is Numberic keys 0-9, ESC key, Function keys, Up-Down keys,
Enter key, Input terminall and Output terminal.
The rear-panel layout of M881X is as follows:
Picture 3.2: The Rear Panel of M881X Series Power Suppliers

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①Cooling Window
②Multifunction Interface Connector
③9 Pin COM Interface
④Power Switch Key (110V / 220V)
⑤Power Socket
3.2 Preliminary Checkout
The following steps help you verify that the power supplier is ready for use
1. Check the list of supplied items
Verify that you have received the following items with your power supplier. If anything is missing,
contact your nearest Sales Office.
□One power cord for your location
□The user’s manual
□ One CD(only when you have bought communication accessories)
□ One communication cable (only when you have bought communication accessories)
□ One testing line（only M8811 ,M8812 ,M8813 have the testing line ）
2．Connect the power cord and turn on the power supplier.
When you turn on the power supplier, the VFD display screen will light up briefly and the power
supplier performs its power-on self-test. Please check if there is any stroke loss on VFD display.
Warning：The power supplier is shipped from the factory with a power-line cord that has a plug
appropriate for your location. Your power supplier is equipped with a 3-wire grounding type
power cord. The power supplier is grounded only when the power-line cord is plugged into an
appropriate receptacle. Do not operate your power supplier without adequate cabinet ground
connection.。
3.3 If the Power supplier Does Not Turn On
Use the following steps to help solve problems you might encounter when turning on the instrument.
1. Verify that there is AC power to the power supplier.
First, verify that the power cord is firmly plugged into the power receptacle on the rear panel of the
power supplier. You should also make sure that the power source you plugged the power supplier into is
energized. Then, verify that the power supplier is turned on.

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2. Verify the power-line voltage setting.
The line voltage is set to the proper value for your country (110VAC or 220VAC) when the power
supplier is shipped from the factory. Change the voltage setting if it’s not correct.
3. Verify that the correct power-line fuse is installed.
If the fuse was damaged, please see the table below to replace the fuse for your power supplier.
Model
Fuse Description（110VAC）
Fuse Description（220VAC）
M8811
T5A 250V
T3.15A 250V
M8812
T5A 250V
T3.15A 250V
M8813
T5A 250V
T3.15A 250V
M8851
T10A 250V
T6.3A 250V
M8852
T10A 250V
T6.3A 250V
M8853
T10A 250V
T6.3A 250V
M8871
T15A 250V
T10A 250V
M8872
T15A 250V
T10A 250V
M8873
T15A 250V
T10A 250V
M8874
T15A 250V
T10A 250V
4. How to replace the power-line fuse
Open the plastic cover which locates at below the power input socket in the rear panel of the power
suppliers by screwdriver, then you will see the fuse. Please replace the damaged fuse with the matched
fuse.
3.4 How to Adjust the Carrying Handle
To adjust the position, grasp the handle by the sides and pull outward. Then, rotate the handle to the
desired position. There are following three positions for you to choose:
Picture 3.3 M88XX Series Power Suppliers Viewing Positions

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3.5 How to Rackmount the Instrument
The power supplier can be mounted in a standard 19-inch rack cabinet and be easily applied to your
testing system. If you want to rackmount the M88XX Series, please buy MR01 rack kit.
Note：Remove the carrying handle, the rubber coating, and the foot on the rear panel before
rackmounting the instrument.
Picture 3.4: To Rackmount a Single Instrument
Picture 3.5 To Rackmount Two Instruments Side by Side

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Chapter 4 Panel Operation
This chapter mainly introduces the front-panel operation in detail from the following parts:
Voltage Set Operation
Current Set Operation
Saving and Recalling Operation
Menu Operation
Output ON/OFF Operation
Remote Measurement Function
Milliohmmeter Function
Voltmeter Function
4.1 Key Layout
Picture 4.1 Operation Panel Picture
Multifunction Keys Directions
0～9
Numberic keyss
Menu
Menu operation key
List
List output operation
Trigger
Trigger key
V/mΩ
Voltmeter and milliohmmeter switch button
0.1W
Choosing 0.1W power output operation when the instrument is used as
milliohmmeter
1W
Choosing 1W power output when the instrument is used as milliohmmeter
10W
Choosing 10W power output when the instrument is used as milliohmmeter
Multifunction Keys
Function Keys

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Local
Local operation
Esc
Esc key (can be exited from any working condition)
Function Keys Direction
Setting the voltage value
Setting the maximum current value
Saving the current settings to a particular storage locations
Recalling the saved settings
Menu operation: setting the parameter
On/Off
Control the output state
Shift
Used together with multifunction key to perform diversity functions and
applications(for example: shift+Menu can perform menu function）
▲
Up-key: choosing menu item in menu operation or to increase the output voltage
▼
Down-key: choosing menu item in menu operation or to reduce the output voltage
Confirm key
4.2 Front-panel Operation Overview
The following section describes an overview of the front-panel keys before operating your power
supplier.
The power supplier is shipped from the factory configured in the front-panel operation mode. At
power-on, the power supplier is automatically set to operate in the front-panel operation mode. When in
this mode, the front panel keys can be used.
When the power supplier is in remote operation mode, you cannot use the front-panel. A change
between front-panel and remote operation modes will not result in any change in the output parameters.
You can change the front-panel and remote operation modes by PC.
The output of the power supplier can be enabled or disabled from the front panel by pressing the key
On/Off
.
The VFD display shows the current operating status of the power supplier with annunciators. When it
is powered on, the VFD will display two lines of data. The first line shows the actual voltage value, actual
current value and power supplier’s status while the second line shows the voltage value that can be
measured by voltmeter and output setting value of the M88XX Series power suppliers.
4.3 Constant Voltage Operation
The constant voltage range is from 0V to the maximum voltage value of each model. It is very easy
for you to set the constant voltage output.
Solution One：Press the ▲ and ▼ keys to change the value when the M88XX Series power
V-set
I-set
Save
Recall
Menu
Enter

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suppliers are powered on.
Solution Two: Step1. Power on the M88XX series instrument.
Step2. Press key.
Step3. Press the numeric keys to to enter the voltage value you wanted.
Step4. Press to confirm the value
Close knob lock function when you in config menu,also can use following two operations:
1) Use upper revolving encoder directly to adjust voltage;
2) Press V-set button then use upper revolving encoder to adjust voltage
4.4 Constant Current Operation
The constant current output range is from 0A to the maximum current value of each type. It is very
easy for you to set the constant current output.
Step1. Power on the M88XX series instrument
Step2. Press key
Step3. Use the numeric keys to to enter the voltage value you wanted.
Step4. Press key to confirm the value
IF you close knob lock function in config menu,can use following operation:
Press V-set button then use upper revolving encoder to adjust voltage
4.5 Saving and Recalling Operation
You can store up to 50 different output states in storage register locations so that you can recall the
saved settings quickly. This kind of store operation can be performed by the keys
Save
and
Recall
located in the front panel. When the fast recalling is activated, you can press the numberic keys
to to invoke the corresponding data.
Each output state includes 1. Constant voltage value, 2.Constant current value, 3.Maximun voltage
setting value, 4.Maximum output voltage value.
Step1. After you setting an output state (CV value, CC value and Maximum voltage), press the
key
Step2.Use the numeric keys to or ▲ and ▼ keys to select the memory location (the
range is 1 to 50) which you want to store in.
Step3. Press to confirm the memory location.
Step4. Press key.
Step5. Use numeric keys to or ▲ and ▼ keys to select the states which you want to
recall.
Step6. Press key to confirm. Then the saved settings will come out
4.6 Menu Operation
4.6.1 Menu Description
Press the key
MENU
to access to the menu function and at the moment theVFD display screen
V-Set
Enter
9
0
Enter
I-Set
9
0
Save
Recall
Enter
Enter
9
9
0
0
9
0

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shows the menu items. You can select the menu items by pressing the ▲ and ▼ keys or by rotating the
knob, and then press the key to enter in the menu item you wanted. Or you can press the key
to get back to the higher level menu.
The first level menu includes：
Config
System set
List Set
Auto test
Output Timer
When accessing to Config item，the following menu items will be displayed on the VFD display
screen by pressing the keys ▲ and ▼.
Init:All set for factory value
Output Recall ：
Key Sound Set:
Knob Lock Set:
Flemote Meas.:
Current Unit Set:
Match Power:
Baudrate Set:
Comm. Parity:
ENTER
On
Setting the output to OFF state when the
power supplier is powered on.
Off(Default)
Setting the same state as last time you turned
off the power supplier.
On（Default）
The buzzer will sound when any key was
pressed.
Off
the buzzer will not sound when any key was
pressed
On
The knob is locked and rotating the knob will not
cause any change of the setting value.
Off（Default）
The knob is unlocked and rotating the knob will
cause change of the setting value.
On
Activating the remote meas. mode
( Rear-panel meas. mode)
Off（Default）
Activating the front-panel meas. mode
mA
Current unit mA
A(Default)
Curren unit A (Default)
50HZ
Match 50HZ (50HZ Default)
Off(Default)
Match 50HZ
4800
Setting the baudrate as 4800bps
9600(Default)
Setting the baudrate as 9600bps
19200
Setting the baudrate as 19200bps
38400
Setting the baudrate as 38400bps
None(Default)
Setting no parity bit
Even
Setting comm. parity as even parity bit
Odd
Setting comm. parity as odd parity bit
Esc