Martel Electronics M2000 User Manual

M2000

Operator’s Manual

Table of Contents

I. INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

II. STANDARD EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

III. OPTIONS AND ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

IV. UNPACKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

V. NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

VI. GETTING STARTED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

VII. VOLTAGE OUTPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

VIII. CURRENT OUTPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

IX. SETPOINTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

X. REMOTE INTERFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

XI. REMOTE COMMANDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

XII. SPECIFICATIONS

General Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

DC Voltage, Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

DC Current, Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

2

I. INTRODUCTION

The Martel series M2000 calibrator is designed to be an accurate DC calibrator for R & D,
manufacturing and calibration lab applications. The units simple design and ease of opera­tion allows users to quickly familiarize themselves with its operations and features. Time sav­ing functions like the ability to save, recall and automatically cycle through setpoints for each
output range and a complete remote interface are several key features the M2000 offers.

II. STANDARD EQUIPMENT

• Power cord (for 120 VAC versions)

• Manual

• Certificate of Calibration

III. OPTIONS AND ACCESSORIES

• Panel mount kit (Martel P/N M2000-PMK)

• Low EMF Beryllium copper test leads

IV. UNPACKING

Upon receipt of shipment, inspect the container and equipment for any signs of damage.
Take particular note of any evidence of rough handling in transit. Immediately report any
damage to the shipping agent.

NOTE: The carrier will not honor any claims unless all shipping material is saved for their

examination.

After examining and removing contents, save packing material and carton in the event
re-shipment is necessary.

Remove the Packing List and verify that all equipment has been received. If there are any
questions about the shipment, please call Martel Electronics at 1-800-821-0023.

Check to see if your calibrator is complete. It should include: M2000 Calibrator

Instruction Manual
AC Line Cord

V. NOMENCLATURE

Front Panel Controls and Functions (Refer to Figure 1 for locations)

Fig. 1 Location Description Function

1 Cursor Control Keys Left and Right arrows control cursor placement.

Up and Down arrows increment or decrement the selected
decade.

2 Enter Key Used to acknowledge or accept a value entered through

the keypad. Note: The output will only go to the new
value after the enter key is pressed.

3 Data Entry Keys This numeric keypad is used to set the calibrator to a

specific output.
Several of the keys also act as “second function” keys.

3

4

4 Primary Function Keys

VOLTS/mA Toggles through the Voltage and mA output ranges.
STBY/OPR Toggles between standby and operate modes.
2nd The “second function” key allows the use of the features

described by the second function keys.

CE The “clear entry” will clear the display if a mistake is made

during data entry.

5 Secondary Function Keys These keys perform second functions after the 2nd key has

been pressed.

CAL Used to set LCD contrast, backlight and interface

parameters RS-232 or GPIB (2001A).
For a complete electrical calibration the RS-232 mode is
used. Contact factory for more information.

SET Used to set a setpoint.

See

Section IX RCL Used to recall a setpoints.

AUTO Used to initiate auto setpoint.

See Section X LOCAL Used to regain local control.

6 Output Binding Posts These binding posts are made of a special copper alloy to

reduce thermal EMF’s. These posts support the use of
both standard banana plugs or discreet wires.

7 Display The 16 character by 2 line display is backlit and provides

all visual user feedback.

7A Range Field Displays the range and setpoint number if applicable.
7B OPR/STBY Displays the output state.
7C Unit Field Displays output units.
7D Value Field Displays output value.

5

Refer to Figure 2 for locations

Fig. 2 Location Description Function

1 Voltage Selector and Removing this door allows the user to access the input

Fuse Holder voltage selector switch and the two (2) user replaceable

fuses.

2 On/Off Rocker Switch This is the main power switch for the M2000. It is a double

pole designed for safety.

3 AC Power Inlet This is a standard IEC universal AC input power connector

for worldwide line cord usage.

4 RS-232 Connector The male 9 pin “D” connector allows the M2000 to be con-

nected to any computers serial interface.

5 IEEE 488.2 Connector This connector is only installed on the M2000A for connec-

tion to an IEEE 488.2 (GPIB) Bus.

Figure 1

Front Panel Layout

Figure 2

Rear Panel Layout

1 Cursor Control and

output adjustment
keys

2 Enter or Return key

3 Numeric Data Entry and

2nd function keys

4 Primary Function Control

keys

5 Secondary Function Keys

6 Terillium/copper

output binding
posts

7 16 x 2 Backlit LCD

w/contrast control

7A

7B

7C

7D

4 RS-232 Connector

standard on both the
M2000 and M2000A

5 Optional IEEE 488.2

(GPIB) connector
(Note: M2000A ONLY)

1 Input Voltage

Selector and Fuse
holder (see mainte­nance section for
fuse specifications)

2 Main Power On/Off

Rocker Switch

3 Standard IEC AC Power

Inlet 120/240 VAC

6

VI. GETTING STARTED

1. After unpacking the M2000 and becoming familiar with the nomenclature of the unit as
described in the previous section, the M2000 is ready to be operated.

2. Before attaching the power cord to the rear connector the voltage selector must be set
to the proper line voltage. To do this, remove the rear fuse cover found just above the
On/Off rocker switch (see Figure 2, item #1). Pull out the voltage selector connector and
set it for the proper line voltage using the following guidelines:

Line Voltage (50/60Hz) Selector Position
90 to 135 VAC 120 VAC position
220 to 250 VAC 240 VAC position

3. Once the voltage selection has been made, making sure the power switch is off, connect
the AC power cord to the M2000. (See figure 2, item #3 for reference).

4. Turn on the M2000 using the rear panel mounted rocker switch. The M2000 should
power up within a few seconds. For good stability it is best to leave the M2000 on all the
time.

NOTE: If power up does not occur within 30 seconds re-power the unit.

VII. VOLTAGE OUTPUT

1. To output a voltage, enter voltage mode by pressing the key. The calibra­tor will auto-range in voltage source based on the value of the outputted value. If you

want to lock the calibrator in a specific voltage range press the key followed
by the key.

2. Connect the unit under test (UUT) to the voltage output jacks of the M2000. See figure 3.

3. Using either cursor keys or numeric keypad, enter the desired output value. If the
numeric keypad is used for data, all entries must be acknowledged by pressing the

key.

4. When selecting an output on a new range the M2000 will be in the standby (STBY) mode
which puts the positive (+) output jack in a high impedance state (>100k ohm) for safety.

The output can be placed into the active state by pressing the key which
toggles between the standby and operate modes.

NOTE: The standby mode is also activated if a fault occurs during operation such as an
overload or short circuit condition. For safety the standby mode is activated for the first
output over 30 VDC. Refer to the product specification section of this manual for maxi­mum drive currents.

5. When small changes to an output value are required or if specific decades need to be
incremented or decremented the cursor controls offers a simple solution. The left and
right arrow keys move a cursor that is used to underscore any digit of the output. The
up/down arrow keys allow the digit to be incremented and decremented.

STBY/OPR

Enter

CAUTION

For best accuracy on the mV range use only test leads with

copper plugs. This will minimize thermal EMFs.

Volts/mA

Shift

Volts/mA

WARNING – To prevent electrical shock, only set
the line voltage with the power cord removed.

!

7

VIII. CURRENT OUTPUT

1. To output currents of up to 100mA press the key until the milliamp output
range appears on the display.

2. Operation of the mA output is similar to voltage, operating where output values can be
selected or manipulated by using the numeric data entry keys or cursor controls.

NOTE: Standby mode is activated if the voltage compliance for a given output current is
exceeded. Trying to output a current with no connection made to the output jacks will
force the M2000 into standby mode.

See Figure 4.

3. The M2000 has a typical voltage compliance of 10V so that 4-20mA application loads up
to 500 ohms can be driven. At maximum current (100mA) the maximum load is 100
ohms.

V/mA

Figure 3

Connections for Outputting DC Voltage

Figure 4

Connections for Outputting DC Current

8

IX. SETPOINTS

The M2000 offers functionality which allows the user to store and recall output levels (set­points). Additional functionality allows the user to automatically step through a number of set­points at a configurable interval. Up to 9 setpoints can be programmed for each range.

A. Setting a Setpoint

1. To set a setpoint go to the desired range and enter the desired output value.

2. Once you have entered the output value press the key followed by the
key.

3. Select the number of the setpoint in which the present output value is to be stored.

B. Recalling a Setpoint

1. To recall a setpoint press the key followed by the key.

2. Select the number of the setpoint you wish to recall.

C. Auto Setpoints

1. To initialize auto setpoint functionality, press the key followed by the

key.

2. Select the number of setpoints to be recalled. Setpoints step up from setpoint one to the

setpoint selected and then down.

3. Select the interval (in seconds) between setpoints.

NOTE: During auto setpoint mode the can be used. Pressing any other

key will cause the unit to exit this mode.

X. REMOTE INTERFACE

Setting up the RS-232 Port for Remote Control

The M2000 is fully programmable over an RS-232 link with a PC.
The RS-232 cable length for the port should not exceed 15 meters (50 feet), although longer

cable lengths are permitted if the load capacitance measured at a connection point (including
signal terminator) does not exceed 2500 pF.

RS-232 Port Setup Procedure

Serial parameters are fixed with the values shown below:

· 9600 baud

· 8 data bits

· 1 stop bit

· no parity

· Xon/Xoff

· EOL (end-of-line) character CR (Carriage Return)

A typical connection is shown in Figure 5. Note the use of a null modem cable for connection.

STBY/OPR

AUTO

2nd

RCL2nd

SET

2nd

CAUTION

When in auto setpoint mode the unit does not go to standby

even if the output goes above 30V.

9

Setting up the IEEE-488 Port for Remote Control

The M2000 is fully programmable for use on the IEEE Standard 488 interface bus. The IEEE­488 interface is also designed in compliance with supplemental standard IEEE-488.2, which
describes additional IEEE-488 features. Devices connected to the IEEE-488 bus are designat­ed as talkers, listeners, talker/listeners, or controllers. Under remote control of an instrument,
the M2000 operates as a talker/listener.

A PC equipped with an IEEE-488 interface controls the M2000. Compatible software for IEEE­488 operation, MET/CAL, may be purchased from Fluke.

When using the IEEE-488 remote control interface, there are two restrictions:

1. Number of Devices A maximum of 15 devices can be connected in a single IEEE-488
bus system.

2. Cable Length The total length of IEEE-488 cables used in one IEEE-488 system is 2
meters times the number of devices in the system, or 20 meters, whichever is less.

IEEE-488 Port Setup Procedure

Complete the following procedure to set up the M2000 for remote operations using the IEEE­488 remote control port. The purpose is to select GPIB as the interface and to select the GPIB
address for the interface.

To set up the IEEE-488 port

1. Turn the M2000 power on and wait until the initialization procedure completes. You

may operate the M2000 during warm-up, but specifications are not guaranteed until
warm-up is complete.

2. Press SETUP ( + ).

3. Press until Remote Interface: is displayed.

4. Press the or key to select GPIB, if not already selected.

5. Press to accept the interface choice.

6. Press the or key to select the desired address. The factory default is 4.

7. Press to accept the address choice and exit the Setup menu.
See Figure 6 for a typical IEEE-488 connection

ENTER

▼▲

ENTER

▼▲

ENTER

0SHIFT

Figure 5

RS232 Remote Control connections

Figure 6

Typical IEEE-488 connections