Tequipment 7005 Manual de usuario
1 Contents
1. Introduction …………………………………….. 2
2. Operation ..........................................................3
2.1 Front panel controls..................................3
2.2a Current loop connections..........................4
2.2b Voltage loop connections..........................5
2.3 On/Off control ...........................................6
2.4 Selecting Source or Measure mode..........6
2.5 Selecting Current or Voltage.....................6
2.6 Source Mode ............................................7
2.6a Current source..........................................8
2.6b Voltage source..........................................9
2.6c Output control ..........................................10
2.6d Manual Step / Inching...............................10
2.6e Auto-Step..................................................11
2.6f Ramp ......................................................12
2.6g Output errors.............................................13
2.7 Measure Mode..........................................14
2.7a Current measure.......................................15
2.7b Voltage measure.......................................16
2.7c Min/Max readings.....................................16
3. User setup
3.1 Auto power-down.......................................17
3.2 User programmable range and ramp.........18
4. Specification.....................................................20
5. Battery and recharging....................................22
6. Guarantee and service.....................................23
2
1. Introduction
The 7005 is a micro-processor based instrument for the
calibration of voltage and current loop signals. It can operate in
three modes,
a) Loop current/voltage source (simulating a transmitter and
the loop supply)
b) Sink of loop current (simulating a transmitter)
c) Measurement of loop current/voltage (simulating a loop
indicator).
Display is via a dot matrix LCD screen. User input is by 7 front
panel buttons.
Source functions are a) Manual step, b) Auto step c) Ramp. In
step function there are five calibration points, 0%, 25%, 50%,
75% and 100% of span. In ramp function the output ranges
between 0% and 100% of span the ramp rate and dwell time are
user programmable.
In source mode the range can be user programmed for any
values between 0mA to 50mA, or 0V to 21V. For example a low
point of 10mA and a high point of 50mA could be set giving a
span of 40mA
In measure mode only fixed ranges are available. Current and
voltage is displayed in 5-digit format in mA or Volts. Alternatively
the current may be displayed in % of span.
An internal NiCad battery can power the unit for up to 9 hours.
Recharge is available via an external mains powered unit. The
display will indicate ‘Low Batt’ when the unit needs to be
recharged. An automatic power-down feature is incorporated
and turns the unit off after approximately 7 minutes if no buttons
are pressed. If required the automatic power-down feature can be
disabled in the user set-up.
The unit is constructed in an impact resistant ABS case and
connections are made via 4 off 4mm binding terminal posts.
3
Selects one of the
following 5 ranges,
User programmed
4 - 20 mA
0 - 20 mA
Sqrt 4 - 20mA
Sqrt 0 - 20mA
When in Source
and manual step
mode, steps up
and down
When in Source
and inching
mode, moves
output up and
down
When in Source mode,
toggles between ramp
and manual step
When in Measure
mode, displays Min
and Max values
Press to toggle
between Measure
and Source mode
Press and hold for
power ON and OFF
Short press for
User Setup
2.1 Front panel controls
When in Source
mode, press and
hold for ‘inching’
When in Source mode,
press both together for
auto step
When in Measure
mode, toggles
between V and mA
Note: A short press on the (ON/OFF) button. The button
functions change and are indicated by the adjacent black legends.
Move cursor right.
Increment digit.
Scroll through options.
Save setting.
4
2.2a CURRENT loop connections:
Loop current
indicator
10.00mA
+
—
Loop current
indicator
10.00mA
+
—
24V Loop
power supply
+
—
Source: Unit supplying loop power and setting loop current.
Sink: Unit setting loop current
+
—
Measure: Unit supplying loop power while measuring loop current
Pressure
+
—
7005 measuring loop current. Loop
power from external supply.
Pressure 24V Loop
power supply
+
—
Transmitter
TX
Transmitter
TX
Measure: Unit measuring loop current, loop power external
5
2.2b VOLTAGE loop connections:
Loop voltage
indicator
5.00V
+
—
Source: Unit setting loop voltage
+
—
Measure: Unit measuring loop voltage.
Pressure Transmitter
TX
6
2.3 ON/OFF Control
• To turn the unit ON, press and hold down the
ON/OFF button until the display powers up.
• To turn the unit OFF, press and hold down the
ON/OFF button until the display blanks.
2.4 Selecting Source or Measure Mode
• Turn the unit on.
• By pressing the ‘Source / Measure’ button the unit
can be toggled between source mode and
measure mode.
Source mode
selected Measure mode
selected
2.5 Selecting Current or Voltage
Please note that changing between voltage and current can
only be done in Measure mode.
• Pressing the ‘Source / Measure’ button to
change in to Measure mode.
• Press the ‘V / mA’ button until ‘V’ or ‘mA’ is
displayed on the screen
7
2.6 Source mode
The unit can be operated as either a current source or a
voltage source. When calibrating current loops, the internal
24V power supply may be used to provide the drive voltage.
Alternatively, when the loop is externally powered, the unit
provides a sink function. Operation of the unit in both source
and sink is identical. However the connections made to the
terminals differ (see chapter 2.2).
Source mode Desired output
(mA)
Selected calibration point
(0%, 25%, 50%, 75% or 100%)
Actual output (% of span)
Selected
range
Manual step
Typical source display
8
2.6a Current source
Selection of range
• Switch the unit on.
• Ensure unit is in a mA range, see chapter 2.5.
• Select Source mode, see chapter 2.4.
• Press the ‘Range’ button to step though
the available ranges,
4 to 20mA
0 to 20mA
sqrt 4 to 20mA
sqrt 0 to 20mA
User programmed range
Note that the first four ranges above are indicated on the display
to the right of the word RANGE. When the User programmed
range is selected, ’USER’ is shown on the right of the word
RANGE.
4 to 20mA
range 0 to 20mA
range
sqrt 4 to 20mA
range sqrt 0 to 20mA
range
User programmable
range
9
2.6b Voltage source
The unit can operate as a voltage source up to a maximum of
21V at 20mA.
Connection is made via the COM and V+ terminal.
Please note that these are the same terminals used for voltage
measurement and it is therefore recommended that all leads
are disconnected when changing from Source to Measure
mode. See chapter 2.2 for connection details.
See chapter 2.5 to select voltage operation.
See chapter 2.4 to select source mode.
Only the user programmable range is available in voltage
source operation.
Desired output
(V)
Selected calibration point
(0%, 25%, 50%, 75% or 100%)
Actual output (V)
User programmable
range
Manual step
Typical Voltage Source display
Tabla de contenidos
Otros manuales de Equipo de prueba de Tequipment
Manuales populares de Equipo de prueba de otras marcas
SMART
SMART KANAAD SBT XTREME 3G Series Manual de usuario
Agilent Technologies
Agilent Technologies BERT Serial Manual de usuario
Agilent Technologies
Agilent Technologies N3280A Manual de usuario
Vernier
Vernier Go Direct Voltage Manual de usuario
Lifeloc
Lifeloc R.A.D.A.R. Manual de usuario
Fluke
Fluke T5-600 Instrucciones de funcionamiento e instalación
