Time Electronics 7040 User manual

User Manual
7040
Digital Pressure/Current Calibrator
Version 1.1
March 2021
Time Electronics Ltd
Unit 5, TON Business Park, 2-8 Morley Road,
Tonbridge, Kent, TN9 1RA, United Kingdom.
T: [phone] | F: [phone]
[e-mail] | www.timeelectronics.com

© 2021 Time Electronics Ltd.
All rights reserved.
Nothing from this manual may be multiplied, or made public in any form or manner, either
electronically or hard copy, without prior written consent from Time Electronics Ltd.
This also applies to any schematics, drawings and diagrams contained herein.
This manual provides operating and safety instructions for the Time Electronics product.
To ensure correct operation and safety, please follow the instructions in this manual.
Time Electronics reserves the right to change the contents, specifications and other
information contained in this manual without notice.

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Contents
1Introduction....................................................................................................................................4
1.1 Description.............................................................................................................................................4
1.2 Contents list...........................................................................................................................................4
1.3 Pressure fittings.....................................................................................................................................5
1.4 Loop Current connection ....................................................................................................................... 5
2Specifications ................................................................................................................................6
2.1 Pressure Calibration ..............................................................................................................................6
2.2 Loop Current Calibration .......................................................................................................................6
2.3 Main Functions ......................................................................................................................................7
2.4 RS-232 Serial Interface .........................................................................................................................7
2.5 General Specifications...........................................................................................................................7
3Operation........................................................................................................................................8
3.1 Front Panel Controls.............................................................................................................................. 8
3.2 Operation...............................................................................................................................................9
4Fault Conditions ..........................................................................................................................15
5Re-Calibration ..............................................................................................................................15
6Warranty and Servicing............................................................................................................... 16

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1Introduction
1.1 Description
The 7040 is a hand-held pressure/vacuum calibrator suitable for workshop, laboratory and
field use. It also has the provision to measure process loop current. This allows pressure
transmitters and converters to be calibrated directly.
Pressure ranges are 0.2, 2, 5, 10 and 20 bar. These are specified on ordering.
The display is 4.5 digit LCD. Power is via a 9V PP3 battery.
Basic accuracy is 0.04% for pressure.
Pressure can be displayed in any of nine popular engineering units. Loop current is
displayed in mA, or percentage of span (4-20mA).
A leak rate function is also provided and displays leakage, either in pressure units per
second, or per minute as selected in the ‘User Set-Up’.
Additionally maximum and minimum pressure (or loop current) can be displayed.
1.2 Contents list
The 7040 is supplied with carrying pouch and the following accessories:
1. Pneumatic fittings kit and hose
2. Test leads
3. Technical manual
4. RS-232 lead

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1.3 Pressure fittings
The 7040 is equipped with a standard 1/8 “ BSP female pneumatic port manifold for
connection of the pressure to be measured. A range of adaptors and fittings are available to
fit the 1/8 “ BSP port. Should you have difficulty in obtaining a suitable adaptor, contact Time
Electronics or their authorized agent. For many applications it is a good idea to fit a quick
release fitting to the 7040’s port. Then various adapters can be assembled to match each
type of connection required. This overcomes the need to keep changing the fitting in the
manifold and this prolongs its life and prevents the possibility of accidental damage during
fitting.
Mounting the pressure fitting:
The fitting used should be a 1/8 “ BSP parallel thread. It is recommended
that a flat faced fitting be used so that a Dowty seal can be used to mate
with the flat face of the 7040’s manifold.
Locate the pressure fitting into the manifold and tighten by hand. Use the correct sized
spanners to finally tighten the pressure fitting to the manifold.
The manifold has been machined with square faces so that a 16mm (5/8”) AF spanner may
be used to allow proper tightening. Warning: always use two spanners (one for the
manifold and one for the fitting) and do not hold the instrument base while tightening the
connector since this will cause internal damage to the 7040.
1.4 Loop Current connection
Two 4mm sockets next to the pressure port are provided to allow connection into a process
current loop.

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2Specifications
2.1 Pressure Calibration
Pressure Range: 0.2, 2, 5, 10, or 20 bar (specified on ordering)
Vacuum: Available on 2 bar range. Measures vacuum to - 1 bar
Accuracy: 0.04% of range +/-1dig (0.2bar ver 0.1% +/-1dig)
Resolution: 4.5 digit (0.2bar ver 3.5 digit)
Filter: Off (4 rdgs/sec), 1sec (av 4rdg), 4sec (av 16rdg)
Temp. Stability: Less than 0.005% per degC
Sensor: Piezoresistive
Pressure connection: 1/8” BSP female in stainless steel manifold
Overpressure: 3 x full scale, or 35 bar, 1.2 x FS sounds alarm
Wetted parts: Stainless steel & silicon (contaminated media version - stainless steel only)
Units: Bar, PSI, Kg/cm2, inHg, mmHg, cmWg, inWg, kPa, Atm
2.2 Loop Current Calibration
Range +/- 200mA , or % of 4 - 20mA
Display: -199.99 to +199.99mA, or -25% to +200%
Accuracy: 0.05% of reading +/- 2digit (0.1% for %4-20mA)
Resolution: 10 uA (200mA range), (0.1% for %4-20mA)
Loop resistance: Less than 2 ohms
Protection: 250 mA automatic reset Poly-Fuse
Sockets: 4mm industry standard

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2.3 Main Functions
Pressure display in one of 9 user selectable units
Loop current display in mA, or % of 4 - 20mA
Leak rate display in pressure units per sec, or per minute
Max/Min display either pressure, or loop current value.
Note: If the calibrator has the scope calibration option fitted, the drive from the BNC socket will be insufficient. In
this case the main output sockets must be used.
2.4 RS-232 Serial Interface
Using a PC or laptop computer and an interface program (contact TE or authorised dealer)
most of the 7040’s displayed parameters can be read back – Pressure, Loop Current, Max
Value, Min Value. By arranging for the PC to store these values in a database a full data
logging function is available. Alternatively, by using a calibration software package such as
Time Electronics’ EasyCal, pre-written calibration procedures can be executed and the
results recorded automatically. Calibration certificates can then be printed on site or back in
the lab as required.
2.5 General Specifications
Power: PP3 battery, Life, 100hr continuous use
Front panel: Polycarbonate membrane keypad
Case: Impact resistant ABS
Operating temp: 0 to 50 degC
Storage temp: -10 to 60 degC
Accessories: Carry case, Pneumatic fittings kit, Test lead, RS232 serial lead
Size: 157 x 90 x 33 mm (6 x 3.5 x 1.2 inch)
Weight: 0.29kg (10oz)

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3Operation
3.1 Front Panel Controls

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3.2 Operation
To power up the 7040, press the ON/OFF button for one second. To check the display is
functioning correctly it shows all segments of the LCD while the button is being pressed. On
releasing the ON/OFF button, the pressure units that were being used previously are
displayed briefly. The display then shows the pressure applied to the input. To power down,
press the ON/OFF button for 2 seconds.
Note: When powering up, if both the ON/OFF and ZERO buttons are pressed the software
version number is shown.
Display selection -mA/Pres button
This button toggles the display between pressure and loop current. Note that the loop
current display has two modes, it will either be displayed as mA (-200 to +200 mA), or
percentage (%) of 4-20 mA (4mA = 00.0, 20ma = 100.0). The user can select which mode in
the ‘User Set-Up’ described later in the manual.
Immediately after pressing the mA/Press button, the pressure units or loop current mode will
be displayed briefly before the value is displayed.
The ZERO button
With zero applied pressure (vented) press the ZERO button to zero the display. Small
variations in the 7040’s zero value occur due to changes in barometric pressure and
temperature. The 7040 should always be zeroed before making precision pressure
calibrations.
The ZERO button can also be used to null out pressures where a differential pressure
calibration is required.
The Leak button
Please note that the leak rate function is for pressure only.
Pressing the Leak button will initially display LEAk. The leak rate is then displayed as the
currently selected pressure units per second, or per minute (as selected in ‘User Set-Up).
Periodically the display flashes ‘LEAk’ to remind the user in which mode the 7040 is
operating. When ‘per minute’ rate is selected there is a short delay before the first leak rate
is displayed.
To exit leak function, press the Leak button again. The display returns to the normal display.

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The Log button
The log function (Minimum and Maximum recording) works for both pressure and loop
current (both mA & %4-20mA).
Pressing the log button initially displays the minimum symbol (∪∪∪) before displaying the
minimum pressure or loop current.
Pressing the log button again initially displays the maximum symbol (∩∩∩) before displaying
the maximum pressure or loop current.
Pressing the log button a third time returns to the pressure or loop current display.
Note: Pressing and holding the log button for more than two seconds clears the
maximum/minimum logging - this is indicated by ‘Clr’ on the display and a beep from the
alarm sounder. The recorded max and min values are updated continuously and can be
monitored by leaving the display showing either the max or min as required.
User Setup
The user options are selected using the Menu and Select buttons.
MENU and SELECT buttons
The MENU button is used to step through the main menu items:
Units (Unit)
Loop (Loop)
Filter (Filt)
Auto Power (A.off)
Leak Time (Lea.t)
To select a menu item, press the SEL button. The display will then show the options. The
menu button is used to scroll through the options. When the desired option is displayed
press the SEL button to select and save it. The display then returns to the normal pressure
or loop current mode.