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MX100T
INSTRUCTION MANUAL
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Aim TTi MX100T, MX100TP INSTRUCTION MANUAL

MX100T & MX100TP
Triple Output Multi-Range DC Power Supply
INSTRUCTION MANUAL
CONTENTS
1 Product Description ......................................................................................................4
2 Safety .............................................................................................................................5
3 Installation .....................................................................................................................6
3.1 Mains Operating Voltage ..........................................................................................6
3.2 Mains Lead ...............................................................................................................6
3.3 Mounting ...................................................................................................................6
3.4 Ventilation .................................................................................................................6
4 Connections ..................................................................................................................7
4.1 Front Panel Connections ..........................................................................................7
4.2 Rear Panel Connections (MX100TP) .......................................................................7
4.3 Terminal Voltages and Safe ty...................................................................................7
4.4 Output Protection ......................................................................................................7
5 Initial Operation .............................................................................................................8
5.1 AC Power On/Off ......................................................................................................8
5.2 DC Output On/Off .....................................................................................................8
6 The Display and Soft Key Control ...............................................................................9
6.1 The Home Screen ....................................................................................................9
6.2 Individual Output Screens ........................................................................................9
6.3 Setting with the Keypad .......................................................................................... 10
6.4 Setting with the Spin Wheel .................................................................................... 10
7 Power Supply Settings ............................................................................................... 11
7.1 CV and CC modes, Viewing Settings (Limits)......................................................... 11
7.2 Setting with Individual Output Screens ................................................................... 11
7.3 Power Display (VxA) ............................................................................................... 12
7.4 Selecting Current Meter Averaging ......................................................................... 12
7.5 Setting Over-Voltage and Over-Current protection ................................................. 12
7.6 Setting the Voltage/Current Range ......................................................................... 13
7.7 Store and Recall of Settings ................................................................................... 13
7.8 The System Menu Screen ...................................................................................... 14
7.9 Voltage Tracking ..................................................................................................... 14
7.10 Locking the Front Panel ...................................................................................... 14
8 Display Symbols ......................................................................................................... 15
9 Menu - Advanced Functions ...................................................................................... 16
9.1 Setting Voltage Tracking ........................................................................................ 16
9.2 Current Meter Averaging Setup .............................................................................. 17
9.3 Store and Recall of Settings for All Outputs ........................................................... 17
9.4 Multi-On / Multi-Off Operation and Sequencing ...................................................... 17
9.5 Pass Code Locking of the Front Panel ................................................................... 18
9.6 System Preferences ............................................................................................... 19
9.7 Setting to Factory Defaults ..................................................................................... 19
9.8 Adjusting LCD Contrast .......................................................................................... 19
9.9 Calibration .............................................................................................................. 19
9.10 Remote Control Interfaces (MX100TP only) ........................................................ 19
Page 1
10 Changing System Preferences ............................................................................... 20
10.1 Status at Power-up .............................................................................................. 20
10.2 Alert Sound (Beep) .............................................................................................. 20
10.3 Spin Wheel Action ............................................................................................... 20
11 Notes on Operation .................................................................................................. 21
11.1 Accuracy and Resolution ..................................................................................... 21
11.2 Remote Sense .................................................................................................... 21
11.3 Parallel Wiring of Outputs .................................................................................... 21
11.4 Series Wiring of Outputs ..................................................................................... 22
11.5 Instantaneous Current Output ............................................................................. 22
11.6 Output On/Off and Response Speed ................................................................... 22
11.7 Using OVP and OCP ........................................................................................... 23
11.8 Over-temperature Trip (OTP) .............................................................................. 23
12 Remote Interface Operation (MX100TP only) ........................................................ 24
12.1 MX100TP Rear Panel Connections..................................................................... 24
12.2 Remote Interface Configuration .......................................................................... 24
13 Remote Commands (MX100TP only) ...................................................................... 34
13.1 General ............................................................................................................... 34
13.2 Command List ..................................................................................................... 35
14 Maintenance ............................................................................................................. 40
14.1 Cleaning .............................................................................................................. 40
14.2 Fuse .................................................................................................................... 40
14.3 Calibration ........................................................................................................... 40
14.4 Firmware Update ................................................................................................. 40
15 Technical Specifications ......................................................................................... 41
16 Default Values .......................................................................................................... 44
Page 2

1 Using this Manual

This manual includes cr os s references which are shown as fol lows - see section X.X. Within a PDF file, the shaded number is a hyperlink to that section number which enables the
user to jump rapidly to the sect i on r eferred to and then jump back to c ontinue reading the original section.
(N.B. for hyperlink navigation within Acrobat Reader , enable “show all page navigati on tools” or use the keyboard shortcut s Alt+Left-Arrow and Alt+Right -Arrow).
The Table of Contents is also fully hyperlinked and is replicated within the Bookmarks pane.
Note: The latest revisio ns of this manual, device drivers and s oftware tools can be downloaded from: http://www.aimtti.com/support or http://www.aimtti.us/support
This manual is 48511-1610 Issue 5
(USA).
Page 3

2 Product Description

The MX100T is a triple output l aboratory power supply incorp or ating three outputs of similar power and features.
Each output can provide 0 to 35 volts at 0 to 3 amps (105 watts) with range switching extending its capabilities to prov ide voltages up to 70V and currents up to 6A. Twelve range combinations are available as shown in t he c har t.
Mixed-mode r egulation is used which com bines switch­mode power conversion with linear final regulation to give good noise and transient performance.
All information is displayed on a large backlit graphic LCD and control is via soft keys together with a numeric keypad and spin wheel.
Advanced features inclu de 50 settings memories for each output plus 50 further memories that record the settings for all three outputs together.
Multi-On and Multi-Off keys supplement the individual output On/Off keys and can be programmed to turn the outputs on or off in a timed sequence.
The front panel can be locked t o pr ev ent accidental changes to settings.
The power supply is housed in a compact half-rack width, 3U high c as e with front input ventilation. An intelligent fan is used to minimise coolin g nois e.
The MX100TP has the sam e manual control features and adds USB, RS232, GPIB and LXI compliant LAN interfaces together with duplicate power and sense terminals at the rear.
Page 4

3 Safety

meaning Caution. In this manual this symbol is used to highl ight situations where Earth (ground) terminal.
mains supply OFF.
l
mains supply ON.
alternating current (ac )
This power supply is a Safety Class I instrument according to IEC classification and has been designed to meet the requirements of EN61010-1 (Safety Requirements for Electrical Equipment for Measurement, Control and Laboratory Use). It is an Installation Category II instrument intended for operation from a normal single phase supply.
This instrument has been tested in accordance with EN61010-1 and has been supplied in a safe condition. This instruction manual contains some information and warnings which have to be followed by the user to ensure safe operation and to retain the instrument in a safe condition.
This instrument has been designed for indoor use in a Pollution Degree 2 environm ent in the temperature range 5°C to 40°C, 20% - 80% RH (non-condensing). It may occasionally be subjected to temperatures between +5°C an d –10°C without degradation of its safety. Do not oper ate while condensation is present.
Use of this instrument in a manner not specified by these instructions may impair the safety protection provided. Do not operate the instrument outside its rated supply voltages or environmental range.
WARNING! THIS INSTRUMENT MUST BE EARTHED
Any interruption of the mains earth conductor inside or outside the instrument will make the instrument dangerous. Intentional interruption is prohibited. The protective action must not be negated by the use of an extension cord without a protective conductor.
When the instrument is connected to its supply, terminals may be live and opening the covers or removal of parts (except those to which access can be gained by hand) is likely to expose live parts. The apparatus shall be disconnected from all voltage sources before it is opened for any adjustment, replacement, maintenance or repair. Capacitors inside the power supply may still be charged even if the power supply has been disconnected from all voltage sources but will be safely discharged about 10 minutes after switching off power.
Any adjustment, maintenance and repair of the opened instrument under voltage shall be avoided as far as possible and, if inevitable, shall be carried out only by a sk illed person who is aware of the hazard involved.
If the instrument is clearly defective, has been subj ect t o mechanical damage, excessive moisture or chemical corrosion the safety protection may be impaired and the apparatus should be withdrawn from use and returned for checking and repair.
Make sure that only fuses with the required rated current and of the specified type are used for replacement. The use of makeshift fuses and the short-circuiting of fuse holders is prohibited.
Do not wet the instrument when cleaning it. The following symbols are used on the instrument and in this manual:-
incorrect use may either damage the instrument or cause a potential hazard to the user.
Page 5

4 Installation

4.1 Mains Operating Voltage

This instrument has a univers al input range and will operate from a nominal 115V or 230V mains supply without adjustment. Check that the local supply meets the AC Input requirement given in the Specification see section 17.

4.2 Mains Lead

Connect the instrum ent to the AC supply using the mains lead pro vid ed. Should a mains plug be required for a different mains outlet socket, a suitably rated and approved mains lead set should be used which is f itted with the required wall plug and an IE C60320 C13 connector for the instrument end. To determine the minimum current rating of the lead-set for the intended AC supply, refer to the power rating information on the equipment or in the Specification.
WARNING! THIS INSTRUMENT MUST BE EARTHED.
Any interruption of the mains earth conductor inside or outsid e the instrument will make the instrument dangerous. I ntentional interruption is prohibited.

4.3 Mounting

This instrument is s ui table both for bench use and rack mounting. It is delivered with feet for bench mounting. The f ront feet include a tilt mechanism for optimal panel angle.
A rack kit for mounting in a 19” rack i s available from the manufacturers, or their agents and distributors overseas.

4.4 Ventilation

The power supply is cooled by an intelligent multi-speed fan which vents at the rear. Cooling air is drawn in through slots in t he front panel directly above the terminals, and by slots in the base of the unit close to the front.
In a rack-mounted situation no additional space is required above or to the sides of the unit. Some air space below the unit will ensure the best possible airflow and the lowest fan speeds for a given power, but is not required.
Ensure that the ventilation slots and rear fan exhaust are not obstructed. In the event of overheating, a temper ature trip will turn all of the outputs off – see section 11.8.
Page 6

5 Connections

5.1 Front Panel Connec tions

For each output, the load should b e connected to the positive (red) and negative (black) terminals marked OUTPUT.
Both are fully floating and either can be connected to ground or t o a terminal of another output. Remote sense connections to the load, if required, are made from the positive (+) and negati v e
(-) SENSE terminals. Switch the SE N S E switch to REMOTE when remote s ens ing i s r equired. Switch back to LOCAL when remote sensing is not in use. See section 11.2 for more information.
The grey terminal marked with an Earth symbol is connected to the chassis and safety earth ground.

5.2 Rear Panel Connections (MX100TP)

The MX100T has only an AC power connection socket on t he r ear panel. The MX100TP has duplicate power and sense terminals on the rear panel and offers full remote control capabilities through USB, RS232, GPIB and LAN interfaces.
All interfaces are full y isolated from the power supply output terminals. USB, RS232 and G PIB interfaces are connected to chassis ground. The LAN interface is isolated by standard network transformers.
Rear connections for t he MX100TP are detailed in section 12.1.

5.3 Terminal Voltages and Safety

The outputs of the power supply are fully floating and may connected to other equipment resulting in the voltage appearing at a terminal being greater than the output voltage alone.
The maximum permissible voltage between any terminal and earth ground ( ) is 300VDC; the maximum permissible voltage between either terminal of one output and either terminal of another output on the same power supply is also 300VDC.
WARNING! Such voltages are exceedingly hazardous and great care should be taken by the user. The front terminals are intrinsically touch proof, but hazard may still exist depending upon the type of connection made to the terminal. On no account should the connections be touched under such use.
For the MX100TP only, voltages appearing on the front terminals will als o appear on the rear terminals. The rear terminals have protective walls but are not intrinsically touch proof, and additional precautions must be taken if voltages above 70 volts DC could be present.
If any hazardous voltages could exist, all connections to the front or rear terminals must be m ade with the power switched off on all voltage sources.

5.4 Output Protect ion

Each output is protected agains t the application of external forward voltages up to 50 volts (outputs 1 and 2) and 90 volts (output 3). Each output is protected agai ns t the application of reverse voltages by a clamp diode with a maximum conti nuous c urrent capability of 3 amps.
Further protection is provided by OVP and OCP trips and an over-temperature trip.
Page 7

6 Initial Operation

6.1 AC Power On/Off

Power ~ O/I
The AC power switch is located at the bottom left of the front panel. At power-up a screen is displa ye d that shows the firmware revis i on number and a brief
description of the starting conditions. These can be changed from System Pref er enc es if required – see section 10.1.

6.2 DC Output On/Off

On/Off
Each output has its own DC On/Off key. These are positioned direc tly above each set of output terminals and are numbered 1, 2 and 3 from left to ri ght. Alternate presses of the key turns the output on or off. The on stat e is indicated by the key being illuminated in red.
At power-up the default beha viour is for all the outputs to be s et to off. However, the user can change thi s default setting such that t he outputs are restored to their condition when the instrument was switched off. This change is made from System Preferences - see section 10.1.
Multi-O n / Multi-Off
It is also possible to turn all three outputs on or off simult aneously using the Multi-On and Multi-Off keys. By default these keys operate on all three outputs simult aneously but the behaviour can be changed to turn the outputs on or off i n a timed sequence or to remove an output from either Mult i-On or Multi-Off control, see section 9.4.
Page 8

7 The Display and Soft Key Control

With the exception of output On/Off, the primary control of the power supply is via the six ke ys dir ec tly below the display. These are referred to as “soft keys” because their function is not fixed but is annotated by legends on the display directly above.
The function of the keys depends upon the type of screen selec ted. There are five main screens which are s el ec ted by the keys to the right of the di s play. The selected key is illuminated.
The main screen (Home) displays all t hr ee outputs simultaneously, the system menu screen (Menu) provides ac c es s to advanced functions, and the individual output screens (O/P n) show more detailed inform ation for each individual output.

7.1 The Home Screen

The main (Home) screen is selected with the key marked Home and shows the primary information for all three outputs simultaneousl y whilst enabling voltage and current to be set for any output.
The display is divided in to three sections representing outputs 1, 2 and 3 from left to right. For each output the display shows operat ing mode on the top line as CV (constant voltage), CC (constant curr ent) or SET (Settings). SET is displayed when the output is off.
The two meters directly below show the set values for voltage and current when the output is off, and the voltage and cur r ent being supplied to the load when the output is on.
With an output on, the three lines below the meters show the set volt age (Vset), the set current (Iset) and the output range (Range). If the output is off, the Vset and Iset lines do not appear (because the meters are showing the set values).
The six soft keys are used to set voltage (Vset) or current (Iset) for each of the outputs. The presently selected output and parameter (V or I) is indicated by illuminat i on of the soft key and by a flashing arrow in front of the parameter to be adjusted. The user can move freely between setting voltage or current for any out put by pressing the appropriate k ey.
Pressing the same key again or pressing ESC (Escape) cancels the key and disables all sett ing capability.

7.2 Individual Output Screens

Each output has its own display screen selected with t he keys O/P 1, O/P 2 and O/P 3. The selected key is illuminated.
These enable additional parameters and functions to be controlled for that output including Range, OVP & OCP, memory store & recall (Stores), and current meter averaging (Iavg). These are detailed withi n s ection 7.
Page 9

7.3 Setting with the Keypad

Vset & Iset
Voltage or current can be set using the numeric keypad. Upon pressing a numeric k ey, the OK key will start to flash. When the numeric value entry is completed, pressing OK causes the va l ue to be accepted and actioned. E ntry can be abandoned at any point by pressing ESC (Escape). The new value being entered is shown directly below the meters in a sm aller font size.
Entry is in volts or amps to a res olution of 0.001 volts and 0.0001 amps for output 1, and 0.01 volts and 0.001 amps f or out puts 2 and 3.
Entries need only to be completed as far as the desired digit of resolution, e.g. to enter 5.000 volts it is only necessary to ent er 5 followed by OK.

7.4 Setting with the Spin Wheel

Vset & Iset
Voltage or current can alternatively be set using the spin wheel. The wheel is disabled by default but can be enabled by pressing the ke y below it which toggles its action on or off. When enabled the key is illuminated. The wheel changes the output settings immediately, no OK confirmation is required.
The wheel has a non-linear action. If it is moved slowly the value is incremented in minimum steps (1mV/0.1mA for output 1, or 10mV/1mA for outputs 2 or 3). When the wheel is r otated more rapidly the rate of increment is increased enab li ng the value to be changed quickl y.
7.4.1 Spin Wheel Action Options
The action of the spin wheel can be c hanged from System Prefer enc es to reduce the speed-related increment rate if preferred. Three choices are available: Normal (default), Reduced acceleration, or Single Digit Increment.
Making changes is described in section 10.3.
Page 10

8 Power Supply Settings

The procedures for set ting voltage and current, either numerically or via the spin wheel, have been explained in the previous s ec tion.

8.1 CV and CC modes, Vi ewing Settings (Limits)

Depending upon the load conditions, the actual voltage and ac tual current applying t o the load will not both be equal to t hei r s et values.
Output On – CV Mode
When in constant voltage mode the output voltage is equal to t he set value and CV is shown on the top line of the display. The c urrent setting represents the limiting value of current that coul d flow (the current limit).
Output On – CC Mode
When in constant current mode the output current is equal to the set value and CC is shown on the top line of the display. The volt age setting represents the limiting value of voltage that could be applied (the voltage limit).
Switch-over between CV and CC modes oc c urs automatically dependent upon t he l oad conditions and the settings. The voltage and current settings may also be described as limits since they represent the maximum values that can apply at the loa d.
To draw attention to the CC s ymbol and make it clear at a glance, a f lashing arr ow is placed next to it. It is also possible to set an audible aler t – see section 10.2.
Output Off
When an output is off, the meters show these set values and SET is shown on the top line of the display. When an output is on, the values of voltage generate d and current flowing are shown together with CV or CC.
View Settings/ View Limits
It is also possible to view the set values for all three outputs at any time. Pressing the OK key (also marked View Limits or V iew Settings) causes the display to change so that the meters all show the limits values for a period of about 2 seconds.

8.2 Setting with Individual Output Screens

The three illuminated k eys marked O/P 1, O/P 2 and O/P 3 select a screen that controls only the chosen output. This screen provides more information than the main (Home) screen (see section 6.1), and allows additional param eters to be set.
The top line shows the operating mode (CV, CC or SET) together with the voltage tracking status . The meters are displayed in a larger font, and the complete sett ings status for the output is shown below them.
The six soft keys are used to set voltage and current (Vset and Iset), over-voltage and over­current protection levels (OVP & OCP), current meter averaging (Iavg), range selection (Range) and store or recall of settings (Stores).
Setting voltage or current is as previously described for the Home screen – see section 6.1.
Page 11

8.3 Power Display (VxA)

The power being supplied to the load (VxA) is displayed in watts on the lower right hand side. The value is calculated from the metered values of voltage and current and is displayed with a maximum resolution of 0.001 watts f or output 1 and 0.01 watts for outputs 2 and 3.

8.4 Selecting Current Meter Averaging

Iavg
Current meter averaging is us eful when the load current is varying rapidly. It can help to reduce the variation in the reading and make the display easier to foll ow.
Selection is done from each individual output screen. Pr es s i ng the soft key marked Iavg toggles curr ent meter averaging on or off. The pres ent status is shown in the area above the key and by a n asterisk ( s symbol) appearing directly after the curr ent meter. This symbol is also displayed on the Home screen.
Three levels of averaging representing low, medium or hi gh c an be s el ected from the System Menu - see section 9.2. The default value is medium.

8.5 Setting Over-Voltage and Over-Current protection

OVP/OCP
The power supply offer s user adjustable over-voltage protec tion (OVP) and over-current protection (OCP). If a voltage is detected that exceeds the O V P level, or a current is detected that exceeds the OCP level, the output is switched off and the message OVP or OCP is displayed.
OVP is adjustable between 1V and 40V for outputs 1 and 2, and between 1V and 80V for output 3. OCP is adjustable bet ween 0.01A and 7A for outputs 1 and 2, and between 0.01A and 3.5A for output 3.
Pressing the OVP/OCP soft key creates a new set of soft keys from which OVP & OCP values can be set or turned on or off.
Pressing OVP Set causes the key to illuminate and makes the OVP value settable. A new value can be entered us ing the numeric keypad or by the spin-wheel if enabled. OVP can be turned off by pressing OVP OFF, and turned back on by pressing OVP On. The previous OVP value is retained when OVP is off and is displayed in brackets.
Similar capabilities ar e pr ov i ded for controlling OCP. Note that, when set to OFF, the f unc tion is not completely disabled but is set to the maximum
value for the output. Thus if OVP was set to OFF on output 1 and an external voltage greater than 40V was applied to the terminals, an OVP trip would occur.
More information on using OV P and OCP is provided in section 11.7.
Page 12

8.6 Setting the Voltage /Current Range

Range
Each output has more than one range. For output 1 the choice is 35V/3A or 16V /6A. For output 2 the choice is 35V/3A , 16V/6A or 35V/6A. For output 3 t he c hoice is 35V/3A, 70V/1.5A or 70V/3A.
Note that selecting 35V/6A on output 2 will disable output 3, and selecting 70V/3A on output 3 will disable output 2.
Pressing the Range soft k ey brings up a menu screen which shows t he currently selected range by illumination of the soft key. Pressing another key selects a ne w range which is actioned when OK/Exit is pressed.
Note that a change of range can only be made when the output is off. If the output is on, a message will prompt the user to turn it off.

8.7 Store and Recall of Settings

Stores
Each output has 50 memor y stores capable of storing range, volt age, current, OVP and OCP. Pressing t he Stores soft key brings up a m enu screen which shows the present contents of the memor ies f r om which settings can be stored or recalled.
The memories are numbered from 00 to 49 with the currently selected line highlighted. The locati on can be scrolled using the spin wheel or stepped through using the arrow keys. It is al s o pos sible to jump directly to a location by entering a two digit number ( e.g. 07 or 45). Unused memory locations are shown by the word Empty.
Pressing the Store key writes the present settings of the out put into the selected memory location. If the position alr eady has settings stored within it a confirmation is required.
Pressing the Recall key tr ansfers the stored settings of the sel ec ted memory location to the output. This happens immediately that the Recall key is pres s ed. Note that, if the recalled range is different fr om the present r ange, the output will be automatically turned off.
The contents of a particular loc ation can be deleted by pressing the Delete soft key. A confirmation is required.
From the Delete confirmation screen it is also possible to delet e the contents of all 50 locations by pressing Del All. A conf irmation is required.
Store and Recall for Multiple Outputs
It is also possible to store and r ecall settings for all three out puts simultaneously. This is described in Advanced Func tions section 9.3.
Page 13
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