Time Electronics 1090 Specifications

Time Electronics

1090 Portable Process Calibrator

• Measure/Simulate 8 thermocouples

• Measure/Simulate PT100-RTD

• Measure/Source (μV/mV/mA)

• Displays units in °C, °F, μV/mV, or mA

• Automatic or manual CJC

• 10 point memory recall

• Process loops 4 to 20mA & 0 to 50mA

• 24V loop drive voltage

• Mains or battery operation

SOFTWARE

DESCRIPTION

The 1090 is a high performance portable process calibrator that combines source and measurement
functions for thermocouples, PT100s, µV, mV, and mA. As a multifunction instrument the 1090 combines
accuracy and durability with simple operation, making it ideal for process plant applications.

• 60 hours typical use between charges

Thermocouple Measurement and Simulation

Measure and simulate the temperature and mV characteristics of J, K, T, R, S, B, N and E thermocouples.

Cold Junction Compensation

The unit can be operated with or without internal cold junction compensation.

PT100 Measurement and Simulation

Based on 0.3850 alpha probe standard. Range is -200°C to 700°C.

Measurement and Source (µV, mV, and mA)

Measurement ranges are 0 to +/-30mV and 0 to +/-60mA. Source ranges are 0 to +/-80mV and 0 to +80mA.

Temperature Units Selection

The display can be easily changed from °C to °F. The equivalent µV (thermocouples) and ohms (PT100) can
also be shown.

24V Process Loop Drive Mode

A process loop can be driven at 24V and up to 60mA by selecting the ‘Milliamp Source’ mode and setting
it at 60mA (or a lower level if required).

Inching (Incrementing/Decrementing)

The unit has a general-purpose inching function. This adjusts the output in xed increments of temperature

(thermocouples only) or voltage or current. The set-up menu gives a the user a choice of three levels of
increment i.e. 0.1, 1 or 10 for °C/°F, or 1, 10, or 100 µV/µA for voltage/current. The lowest of these represents
the highest setting resolution and provides the most precise control of the output. This is especially useful

for calibrating thermostat controllers that have tight specication on hysteresis.

Memory Recall and Step/Auto-Step Functions

Up to 10 values can be stored in the unit’s non- volatile memory and they can be recalled at any time. The
user can also manually step through them in sequence using the step key. Continuous stepping (auto-step)
is also available at any user selectable rate between 1 and 10 seconds/step.

Power is via an internal high capacity rechargeable metal hydride battery that can be recharged from an
external mains charger (supplied as standard). An auto power-down feature helps conserve battery life
by switching off the instrument if inactive for over 5 minutes. This can be disabled if not required.
The unit is supplied in a robust case with a carrying strap. A pocket for the instruction manual is provided.

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1090 Specifications

TECHNICAL SPECIFICATIONS

TEMPERATURE

Measure Accuracy Simulate Accuracy

Thermocouple Type Temp Range °C Accuracy °C Thermocouple Type Temp Range °C Accuracy °C

J -200 to 580 0.7 J

K

T

R

S

B

N -100 to 890 0.6 N

E -50 to 400 0.4 E -50 to 1000 0.3

-200 to -150 2.5

-150 to 750 0.5 190 to 1250 0.4

-200 to 0 1.5

0 to 400 0.4 150 to 400 0.5

50 to 400 3.0

400 to 1750 1.5 800 to 1750 2.0

-50 to 100 3.0

100 to 1750 1.5 850 to 1750 2.0

110 to 1000 3.5

1000 to 1800 1.5 1200 to 1800 3.0

Resolution: 0.1 °C or °F Resolution: 0.1 °C or °F

An additional correction representing the equivalent 1µV should be allowed for stray thermal emf effects.

K

T

R

S

B

-210 to 150 0.15

150 to 1200 0.3

-270 to 190 0.5

-200 to 150 0.4

-50 to 800 0.8

-50 to 850 0.9

100 to 1200 2.0

-270 to 260 0.5

260 to 1300 1.0

PT100

PT100 Simulation PT100 Measure (0.2°C or °F resolution)

14 set temperature points (°C) Accuracy Range Accuracy

-100, -50, -20, 0, 20, 50, 100, 200,
300, 400, 500, 600, 700, 800

0.1% of resistance value (typically 0.5 °C) -200 to 700 °C, 2 wire. 0.2% of resistance value (typically 0.7 °C)

VOLTAGE

Millivolt Measure 0 to +/- 30mV Millivolt Source 0 to +/- 80mV

Range Resolution Accuracy Input Resistance Range Resolution Accuracy Output Resistance

0 to 30mV 10µV 0.05% of f.s. ±1 digit 100kΩ 0 to 8mV 0.5µV +/-4µV 10Ω

8 to 80mV 5µV 0.02% of f.s. 10Ω

CURRENT

Milliamp Measure 0 to +/- 60mA Milliamp Source 0 to +80mA

Range Resolution Accuracy Input Resistance Range Resolution Accuracy Max Load (24V drive)

0 to 60mA 20µA 0.05% of f.s. ±1 digit 0.5Ω 0 to 8mA 0.5µA +/-10µA

8 to 80mA 5µA 0.02% of f.s.

Inching ........................................................Three levels of increment, 0.1, 1 or 10 for °C/°F, and 1, 10, or 100 µV/ µA for voltage/current. The lowest

.....................................................................of these represents the highest setting resolution and provides the most precise control of the output.

24V Process Loop drive mode ...................A process loop can be driven at 24V and up to 60mA by selecting the ‘Milliamp Source’ mode and

300Ω/80mA
480Ω/50mA

1.2kΩ/20mA

............................................................. setting it at 60mA (or a lower level if required).

Memory recall and step functions .................

10 memory locations for non-volatile storage of values. Manual & AutoStep, rate adjustable from 1 to 10 sec/step

GENERAL SPECIFICATION

Cold Junction Compensation ..................... Accuracy 0.2°C. Resolution 0.1°C.

Operating Temperature ...............................-10 to 40°C (15 to 105°F)

Connections ................................................ Industry standard 4mm screw terminals.

Power ..........................................................A Ni-MH rechargeable battery pack gives approx. 60 hours continuous use. The mains recharger supplied

........................................................................gives full recharge in 11 hours. To conserve battery life a user inactivity power-down feature is included.

Dimensions / Weight ...................................H235 x W150 x D75mm, weight 1.2kg

Optional Extras ............................................ Calibration Certicates – traceable to NPL and UKAS

ORDERING INFORMATION

1090 ............................................................Portable Process Calibrator

C177 ............................................................ Factory (NPL Traceable) Calibration Certicate

C139 ............................................................ UKAS Calibration Certicate (ISO 17025)

Due to continuous development Time Electronics reserves

the right to change specifications without prior notice.

Time Electronics Ltd, Unit 11 Sovereign Way, Botany Industrial Estate, Tonbridge, Kent, TN9 1RH. United Kingdom.

T: [phone] F: [phone] E: [e-mail]

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