Time Electronics 1090 Operating Manual

1090 Temperature Calibrator
Technical Manual
V1.2 07/01/11 Time Electronics Ltd
Botany Industrial Estate, Tonbridge, Kent, TN9 1RH
Tel: +44(0)1732 355993 Fax: +44(0)1732 770312
Email: mail@TimeElectronics.co.uk
Web Site: www.TimeElectronics.com
2

Contents

1. General ................................................................................................................ 3
2. Front Panel Controls .......................................................................................... 4
3. Opera ting Ins truc tion ......................................................................................... 6
3.1. Turning the unit On/Off ...................................................................................... 6
3.2. Thermocouple Measures .................................................................................... 6
3.3. Thermocouple Source ........................................................................................ 7
3.4. RTD (PT100) Simulation Measure ...................................................................... 7
3.5. RTD (PRT) Source ............................................................................................... 8
3.6. uV/mV Measure ................................................................................................... 8
3.7. uV/mV Source ..................................................................................................... 8
3.8. mA Measure ........................................................................................................ 8
3.9. mA Source and 24V Process Loop Drive .......................................................... 9
3.10. Storing and Recalling Values ............................................................................. 9
3.11. Step and Auto-Step Functions ......................................................................... 10
3.12. Inching (Increment/Decrement) ........................................................................ 11
3.13. Menu Functions ................................................................................................ 11
3.14. Setting output values between 0.0 and +1.0 .................................................... 12
4. Maintenance ..................................................................................................... 13
4.1. Battery Life and Replacement .......................................................................... 13
4.2. Display ............................................................................................................... 13
4.3. Front Panel Keypad and Connections ............................................................ 13
4.4. Fuse ................................................................................................................... 13
5. S pecifications ................................................................................................... 14
6. 1090 Calibration Procedure ............................................................................. 18
7. Guarantee & S ervicing ..................................................................................... 20
All Time Electronics' instruments are subject to continuous development and improvement and in
consequence may incorporate minor detail changes from the information contained herein.
1090 Technical Manual Page | 2
3

1. General

The 1090 is a high performance instrument designed for use in both the lab and field. 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 10º C steps, and 0.1,1 or 10 uV/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 5000mA Ni-MH battery pack; this will give a maximum operation time of around 60 hours (depending on functions used). It is important not to over-charge the battery pack, as this could lead to a shortened life; see section 4.1, page 13.
1090 Technical Manual Page | 3

2. Front Panel Controls

A B C
E
F
G
H
I
J
K
L
M
N
P
Q
R
S T U
V
X
Y
W
D
4
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.
1090 Technical Manual Page | 4
5
Secondary functions are shown i n [ ] A 4mm Output Terminals
B 4mm Input Terminals C Chassis earth connection D 16 digit Liquid Crystal Display E Increments output in accordance with user set resolution F Decr em ents output in accordance with user set resolution [Turns unit off] G [Selects Type S thermocouple] H [Selects Type R thermocouple] I [Selects Type K thermocouple] J [Selects Type J thermocouple] K [Selects Type B thermocouple] L [Selects mV] M [Selects mA] N [ Select s uV] P In source mode recalls values stored in memory [Stores values in memory] Q Steps to the next stored value [Auto steps] R [Selects Type T thermocouple] S Allows menu functions to be viewed and changed [Toggles the temperature readout between
o
C and oF] T [Selects Type N thermocouple] U [ Select s Source or Measure] V [Selects Type E thermocouple] W Clears value X Enters an output value. [Selects PRT (RTD) mode]
Y Sets keypads to secondary (RED) functions
Note: The secondary keypad functions are available only when relevant to the selected operating mode eg ’Auto Step’ is not available when the 1090 is in measure mode.
Also please note that the ’SHIFT’ mode has an automatic time out. This means that it will automatically be cancelled if the secondary function is not selected within a few seconds.
1090 Technical Manual Page | 5
6

3. Operating Ins truction

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.
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 up and down arrows until the display indicates step:
3) CJ Aut o xxx
o
C
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 degF requires the unit to be in degF units before entering the menu.

3.2. Thermocouple Measures

When the unit is turned on it displays the software version number and then enters its default mode (mV measure) and displays
Meas 0.00mV
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:
o
Meas Ja 23.9
C
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. The display may be toggled to show in degF or degC by pressing ‘SHIFT’ then the ‘
oC/o
F’ key. Note: If required, the actual thermocouple output voltage in mV can be shown by pressing and holding down the ‘ENTER’ key.
For CJC operation see 3.1
1090 Technical Manual Page | 6
Loading...
+ 14 hidden pages