Time Electronics 1090 User manual

User Manual
1090
Process Calibrator
Revision 2207-1
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

© 2022 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
2Controls..........................................................................................................................................5
2.1 Terminals...............................................................................................................................................5
2.2 Display...................................................................................................................................................5
2.3 Keypad Primary and Secondary functions............................................................................................. 6
2.4 Control Buttons......................................................................................................................................7
3Operating Instructions ..................................................................................................................9
3.1 Turning the unit On/Off ..........................................................................................................................9
3.2 Thermocouple Measure....................................................................................................................... 10
3.3 Thermocouple Source .........................................................................................................................11
3.4 RTD (Pt100) Simulation Measure........................................................................................................ 12
3.5 RTD (PRT) Source ..............................................................................................................................13
3.6 µV/mV Measure .................................................................................................................................. 14
3.7 µV/mV Source..................................................................................................................................... 15
3.8 mA Measure ........................................................................................................................................16
3.9 mA Source and 24 V Process Loop Drive ...........................................................................................16
3.10 Storing and Recalling Values...............................................................................................................17
3.11 Step and Auto-Step Functions.............................................................................................................19
3.12 Inching (Increment/Decrement) ........................................................................................................... 21
3.13 Setup Menu Functions.........................................................................................................................21
3.14 Setting output values between 0.0 and +1.0........................................................................................ 25
4Maintenance................................................................................................................................. 26
4.1 Battery Status and Recharging............................................................................................................26
4.2 Display.................................................................................................................................................26
4.3 Front Panel Keypad and Connections ................................................................................................. 26
4.4 Fuse..................................................................................................................................................... 26
5Specifications .............................................................................................................................. 27
5.1 Technical Specifications ...................................................................................................................... 27
5.2 General Specifications.........................................................................................................................31
61090 Calibration Procedure ........................................................................................................32
7Warranty and Servicing............................................................................................................... 34

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1Introduction
The 1090 is a high-performance instrument designed for use in both the lab and field
applications. It simulates and can measure from the most commonly used temperature
sensors - thermocouples (8 types) and Pt100.
In addition, it can generate and measure mV and mA.
Display is via a large, easy to read, 16-character LCD screen. The user interface is simple
and intuitive.
Increment and Decrement (Inching) keys enable the output to be stepped up or down in
0.1, 1 or 10 ºC steps, and 0.1,1 or 10 µV/mV/mA. This feature is especially useful for
calibrating thermostat type controllers with hysteresis.
Automatic or manual cold junction compensation can be selected and applied.
Up to 10 frequently used output values can be stored in the non-volatile memory. These can
be re-called at any time and stepped through either manually or automatically.
The 1090 is supplied in a robust case with a carrying strap. A pocket for this manual and test
leads is provided. Full operation, including re-charge, is possible without removal from the
case. The lid is reversible to simplify operation.
The 1090 is powered by a 5000 mA Ni-MH battery pack; this will give a maximum operation
time of up to 60 hours (depending on functions used). It is important not to over-charge the
battery pack, as this could lead to a shortened life.

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2Controls
2.1 Terminals
Connections are made by 4 mm terminals are situated at the top of the instrument.
These are clearly labelled for INPUT / OUTPUT / GROUND. Ground is the earth chassis
connection.
2.2 Display
A 16 digit LCD screen provides a clear readout for the selected functions, source and
measurement values, and menu controls/settings.
Meas Pt 60.00°C

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2.3 Keypad Primary and Secondary functions
Most of the 1090’s keys are dual function. Their primary function is shown in blue on the
lower half while the secondary function is shown in red, on the upper half. To access the
secondary functions press the ‘SHIFT’ key before the required secondary function key.
The display indicates when the ‘SHIFT’ key has been pressed by showing an ‘S’ on the right
hand side. This mode is always cancelled after the secondary function is selected, or the
‘CLEAR’ is pressed.
Note: The secondary keypad functions are available only when relevant to the selected operating mode.
For example: ’Auto Step’ is not available when the 1090 is in measure mode.

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2.4 Control Buttons
Button Primary Function Secondary Function
(SHIFT -> BUTTON)
Sets keypads to secondary (RED) functions
The ’SHIFT’ mode has an automatic time out. This means that it will be
cancelled if the secondary function is not selected within a few seconds.
Clears value N/A
Selects Measure Selects Source
Accesses the setup menu
functions so they can be
viewed and changed
Toggles the temperature
readout between °C and °F
Steps to the next stored
value Auto steps
In source mode recalls
values stored in memory Stores values in memory
Increments output in
accordance with user set
resolution
Decrements output in
accordance with user set
resolution
Turns unit off
Enters an output value Selects PRT (RTD) mode

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Button Primary Function
Secondary Function
(SHIFT -> BUTTON)
When pressed before value
input, sets negative polarity.
When pressed after a value
input it sets a decimal point.
Selects mA
Input value 0 Selects μV
Input value 1 Selects mV
Input value 2 Selects type B thermocouple
Input value 3 Selects type E thermocouple
Input value 4 Selects type J thermocouple
Input value 5 Selects type K thermocouple
Input value 6 Selects type N thermocouple
Input value 7 Selects type R thermocouple
Input value 8 Selects type S thermocouple
Input value 9 Selects type T thermocouple

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3Operating Instructions
3.1 Turning the unit On/Off
To Turn On
The unit is powered up by pressing and holding any key for longer than 1 second.
On power-up, the software version and (mV/mA/Pt) will be displayed for 2 seconds.
The battery voltage is then checked and if below 6.5V a ‘Battery Low’ warning is displayed.
If below 6.0V a ‘Battery Dead’ warning appears and the unit powers down.
The unit then goes into its default start mode, Measure mV:
To Turn off
The unit is powered down by pressing ‘SHIFT’ followed by ‘OFF’ key.
3.1.1 Cold Junction Temperature Compensation
Automatic or Manual Cold Junction Temperature Compensation may be applied.
On power up the unit defaults to Auto CJ status.
To change to Manual press the ‘MENU’ key followed by the down arrow until the display
indicates #3:
Press the ‘ENTER’ key. The unit switches to manual and is ready to accept a manual figure
entered from the number keys.
The unit remains in the CJ Manual mode until it is turned off.
Note: Setting Cold Junction Compensation in °F requires the unit to be in °F units before entering the menu.
Meas 0.00mV
3)CJ Aut 23.2°C
Man CJ>________°C
Then
Then
Then

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3.2 Thermocouple Measure
When the unit is turned on it displays the software version number and then enters its default
mode (mV measure) and displays:
Connecting the Thermocouple
Connect the thermocouple cable or compensating cable to the 1090’s input terminals.
Thermocouple Selection
Select the type of thermocouple that you wish to measure by pressing the SHIFT’ key
immediately followed by the thermocouple type. e.g. SHIFT then J to select type J.
The unit will indicate type and temperature. The display will then show:
The ‘a’ following the J indicates that the unit is set for automatic cold junction compensation.
If automatic cold junction compensation is not required, it should be disabled using the menu
set-up. See section 3.1.1
The display may be toggled to show in °F or °C by pressing ‘SHIFT’ then the ‘oC/oF’ key.
If required, the actual thermocouple output voltage in mV can be shown by pressing and
holding down the ‘ENTER’ key.
Meas 0.00mV
Meas Ja 22.5°C
Meas Ja 70.9°F
Meas Ja-0.10mV
Then
Then
HOLD

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3.3 Thermocouple Source
Select Source mode by pressing ‘SHIFT’ followed immediately by ‘SOURCE’ key.
The display will show:
Thermocouple Selection
Select the type of thermocouple that you wish to simulate by pressing the SHIFT’ key,
immediately followed by the thermocouple type.
For example SHIFT followed by ‘J’ to select type J.
The unit will indicate type and temperature. The display will show,
The ‘a’ following the J indicates that the unit is set for automatic cold junction compensation.
If automatic cold junction compensation is not required, it should be disabled using the menu
set-up. See section 3.1.1.
The display may be toggled to show in °F or °C by pressing ‘SHIFT’ then the ‘oC/oF’ key.
If required, the actual thermocouple output voltage in mV can be shown by pressing and
holding down the ‘ENTER’ key.
Connect the device to be calibrated to the unit’s OUTPUT terminals using thermocouple or
compensating cable.
The temperature for a Type J thermocouple can now be simulated. Enter the desired output
temperature using the number keys and press ‘ENTER’ or by using the ‘up/down’ arrow keys.
After setting, pressing the ‘ENTER’ key will momentarily display the equivalent source voltage.
Src 0.000mV
Src Ja 23.8°C
Src Ja 74.8°F
Src Ja>35.5____
Src Ja 35.5°C
Then
Then
Then

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3.4 RTD (Pt100) Simulation Measure
When the unit is turned on it displays the software version number. It then enters its default
mode - Millivolt (mV) and displays:
Select the PRT by pressing the SHIFT’ key immediately followed by ‘PRT’:
The word ‘Over’ indicates over range and is displayed when probe is not connected
(Terminals open circuit). The word ‘Under’ indicating under range is displayed when
terminals are short circuited.
The display may be changed to read in oF by pressing ‘SHIFT’ then the ‘oC/oF’ key.
For this mode connect a Pt100 sensor to the unit’s OUTPUT terminals.
The unit will measure temperature.
Pressing the ‘ENTER’ key will momentarily display the equivalent ohms value.
Meas 0.00mV
Meas Pt Over°C
Meas Pt Over°F
Then
Then

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3.5 RTD (PRT) Source
Select the PRT mode by pressing the SHIFT’ key immediately followed by ‘PRT’:
Select Source mode by pressing ‘SHIFT immediately followed by ‘SOURCE’:
The display may be toggled to show in °F or °C by pressing ‘SHIFT’ then the ‘oC/oF’ key.
For this mode connect the device to be calibrated to the 1090 OUTPUT terminals.
The 1090 is now ready to simulate a Pt100 probe.
Use the ‘Up/Down’ arrow keys to step change the temperature:
The set points are: -100, -50, -20, 0, 20, 50, 100, 200, 300, 400, 500, 600, 700, 800 °C.
Pressing the ‘ENTER’ key will momentarily display the equivalent ohms value:
Meas Pt Over°C
Src Pt -100°C
Src Pt -148°F
Src Pt 20°C
Src Pt 107.8Ω
Then
Then
Then
HOLD

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3.6 µV/mV Measure
Measuring mV
Press ‘SHIFT’ followed immediately by ‘mV’ to select mV measure mode.
The unit is ready to measure mV connected at its INPUT terminals.
Measuring µV
To measure µV press ‘SHIFT’ followed immediately by ‘µV’
The unit is ready to measure ‘µV’ connected at its INPUT terminals.
Meas 0.00mV
Meas 0.00µV
Then
Then

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3.7 µV/mV Source
mV Source
Select Source mode by pressing ‘SHIFT immediately followed by ‘SOURCE’:
Connect the device to be calibrated to the unit’s OUTPUT terminals.
Enter the desired mV values using the numbered keys or ‘Up/Down’ arrow keys.
µV Source
Select Source mode by pressing ‘SHIFT immediately followed by ‘SOURCE’:
Then press ‘SHIFT’ followed immediately by ‘µV’:
Connect the device to be calibrated to the unit’s OUTPUT terminals.
Enter the desired µV values using the numbered keys or ‘Up/Down’ arrow keys.
Src 0.000mV
Src> 15.5____
Src 15.500mV
Src 0.000mV
Src 0µV
Then
Then
Then

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3.8 mA Measure
To select mA Measure mode press ‘SHIFT’ followed immediately by ‘mA’:
The unit is ready to measure mA at its INPUT terminals.
3.9 mA Source and 24 V Process Loop Drive
To select Source mode press ‘SHIFT’ followed immediately by ‘SOURCE’:
To select mA Source mode press ‘SHIFT’ followed immediately by ‘mA’:
Connect the device to be calibrated to the unit’s output terminals
Enter the desired mA values using the numbered keys or ‘Up/Down’ arrow keys.
Note: It should be noted that the unit can provide a maximum output of 80 mA. The user should be aware that
continuous operation at this level will reduce the battery life considerably.
3.9.1 24V process loop drive
It is possible to use the unit to drive process loops with 24 V DC and up to 60 mA.
Select mA Source mode as described above. Set the current output to 60 mA (or less if
required). The output terminals will then provide 24 V (+/- 0.5 V) to drive the loop.
It will allow up to the set value of current to be supplied before the output voltage will drop.
Meas 0.00mA
Src 0.000mA
Then
Then
Then

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3.10 Storing and Recalling Values
In source mode the 1090 is able to store and recall up to ten output values. The values may
be stored in locations 0 to 9. They can then be recalled manually or automatically.
Used in conjunction with the ‘Auto Step’ function the unit can be programmed to output the
stored values in sequence pausing at each value. The pause (wait-time) is adjustable.
3.10.1 Entering and storing values
To store values in memory first the unit has to be in the Source mode. Select the source
mode by pressing ‘SHIFT’ followed immediately by ‘SOURCE’. It will default to mV, select
another function if required (Thermocouple, RTD, µV or mA).
Enter the desired mA values using the numbered keys or ‘Up/Down’ arrow keys.
Press the enter button to confirm:
Press ‘SHIFT’ followed by ‘STORE’ the display will show:
Enter the required store location number, i.e. 0 – 9:
Repeat steps 1 to 3 for up to a maximum of ten store locations.
Note: Store/Recall is not available for PRT (you just step through the fixed values using the up/down arrows for
this parameter).
Src 0.000mV
Src 0.000mA
Src> 15.5____
Src 15.500mA
Store 0-9>
Then
Then
Then

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3.10.2 Recalling Values
Note: The 1090 stores numeric values, and not the units. Therefore, the correct units i.e. µV, mV etc. must be
selected before the recall is done.
To recall the stored values the unit must be in ’SOURCE’ mode.
Then ensure you are in the correct function that you want to use the recalled values.
For example, if the stored values are intended for use with mA, press ‘SHIFT’ then ‘mA’:
Then press ‘RECALL’, the display will show:
Now you can enter required store location number, i.e. 0 – 9:
When you press the required store location number, the display will show the stored value
and it will be sent to the output terminals.
Repeat steps 1 and 2 to recall the contents of the other store locations.
Src 0.000mV
Src 0.000mA
Recall 0-9>
Src 15.500mA
Then
Then

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3.11 Step and Auto-Step Functions
These modes provide a method of manually or automatically stepping through the stored
values.
When in automatic mode the unit may be programmed to dwell on the stored value for
between 1 and 9 seconds before proceeding to the next one.
To use the Auto/Manual Step functions the unit must be in ‘SOURCE’ mode.
3.11.1 Manual Stepping
Ensure that the unit is in ‘SOURCE’ mode and the desired units are selected. Use the
‘RECALL’ key to set the pointer to the stored locations.
Press the numeric button that you want to start your steps at. For example, number ‘1’ will
display and output the value of location 1.
Subsequent pressing of the ‘STEP’ button will step through the store locations in order,
starting with location 2.
After recalling the value of location 9 the next step will return to location 1.
To quickly check the step location number you are setting, you can hold the ‘STEP’ button:
Recall 0-9>
Src 15.500mA
Src 20.000mA
Src 30.000mA
Recall 3
Step to stored location 2
Step to stored location 3
HOLD

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3.11.2 Automatic Stepping
Ensure that the unit is in ‘SOURCE’ mode and the desired units are selected. Use the
‘RECALL’ key to set the pointer to the stored locations.
Press the numeric button that you want to start your steps at. For example, number ‘1’ will
display and output the value of location 1.
Now you can select ‘AUTO STEP’:
The display will then ask you to enter the required delay in seconds, enter a single figure
between 0 and 9 followed by the ‘ENTER’ key.
This will set the dwell time on each recall and automatically start the sequence. An “A” will
show on the right side of the display to indicate auto-stepping mode is active.
After the 9th location has been recalled the sequence will continue by rolling over back to
location 1.
The cycle of stepping through the locations will continue indefinitely until any key is pressed.
This will terminate the cycle immediately, and the “A” indicator will no longer display.
Recall 0-9>
Src 15.500mA
Delay (S)>__
Delay (S)>1_
Src 15.500mA A
Then