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Related Manuals for Tequipment Loop-Mate 1
Summary of Contents for Tequipment Loop-Mate 1
- Page 1 7006 Loop–Mate 1 Loop / Voltage / Current Simulator User Manual...
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Page 2: Table Of Contents
Contents Page Introduction General description Specification 3 - 4 Front Panel Controls Loop-Mate1 Operation Function Select 2.11 Description of typical process loop components 6 - 7 Rx Test 4-20mA output TxSim 4-20mA (Current Sink) 0-10vSim Additional Features Auto Step Audio Beeping Automatic Power Down Loop Error Indication Error Display on the Loop-Mate1... -
Page 3: Introduction
Loop-Mate1 is a service and maintenance engineer’s best friend. It combines low cost and simple operation while providing more than enough accuracy for most applications. It comes complete with carrying pouch, leads, clips and user manual. Loop-mate 1 plus accessories... -
Page 4: Specification
Specification Functions: RxTest, TxSim, 10vSim Ranges: 4-20mA, 0-10v dc (Max current 20mA) Set Points: 7 Points: 0% (4mA or 0v), 10% (5.6mA or 1v), 25% (8mA or 2.5v), 50% (12mA or 5v), 75% (16mA or 7.5v), 90% (18.4mA or 9v), 100% (20mA or 10v) Accuracy: 0.1% of span... - Page 5 Temperature co-efficient: The unit stays in specification over operating temperature range. Operating temp: -5 to 50 degC Storage temp: -30 to 70 degC Operating humid: 10 – 90% non-cond 25degC 14 6.6 2.7cm (6 2.5 1in) / 280gm (10oz) Dimensions / weight:...
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Page 6: Front Panel Controls
1.3 Front Panel Controls 1) Output Terminals (Recessed) 2) Function Switch 3) Auto Step Button 4) Up/Down Control Buttons 5) Power / Error LED 6) Output LED Indicators... -
Page 7: Loop-Mate1 Operation
Loop-Mate1 Operation Function Select The Loop-Mate1 has 3 functions: Function 1: Rx TEST (4-20mA) Function 2: Tx SIM (4-20mA) Function 3: 0-10v dc SIM These are selected using the function select switch. Function 2 acts as a current sink only when an external loop excitation supply is connected. 2.11 Description of typical process loop components: 4-20mA process loop... - Page 8 Process Controllers: This device usually contains both Rx (signal loop) and Tx (control loop) components, which operate in separate loops. The Rx and Tx can be either 4-20mA or 0-10v. Loop excitation supply: A DC power supply (nominally 24v) that drives the loop.
- Page 9 2.2 RxTest function 4-20mA The unit can provide current output from 4-20mA with an internally generated loop excitation drive capability. There are seven output set-points over the span. They are indicated on the front panel in both ‘percentage of the span’ and actual mA. An illuminated LED indicates which point is selected.
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Page 10: Txsim 4-20Ma (Current Sink)
TxSim function 4-20mA (Current Sink) Using the TxSim function the unit takes its excitation power from the loop and acts as a current sink. The excitation supply voltage must be in the range 5 to 50 volts Warning: Do not attach the excitation supply to the terminals of the Loop- Mate1 when TxSim is not selected. - Page 11 Note: The total loop resistance including connections should not exceed 600. 10vSim 0-10v function The unit outputs voltage in the range of 0 to 10V. There are seven set-points. The selected set-point is indicated on the front panel in both ‘percentage of span’ and actual volts.
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Page 12: 0-10Vsim
3. Additional Features 3.1 Auto Step The Loop-Mate1 has the ability to automatically step through the set-points, both up and down. This feature is available for any of the 3 functions (RxTest, TxSim, 10vSim). Auto Step is enabled by pressing the Auto Step button. To disable it press the button again. -
Page 13: Loop Error Indication
4. Loop Error Indication 4.1 Error display on the Loop-Mate1 Loop Error LED With the RxTest function selected. If the loop is open circuit or resistance too high, the error LED will start flashing. However, short circuit on the loop is not indicated. With the TxSim function selected. -
Page 14: Power Supply
5. Power supply 5.1 Battery life The unit is powered by a single PP3 battery. Types that can be used are Zinc Carbon (250mAh), Alkaline (450mAh), Lithium (1200mAh) and rechargeable (150mAh). For best performance Lithium batteries are recommended. Under typical usage an Alkaline (450mA) battery will last for approximately 15 - 20 hours of continuous operation. -
Page 15: Maintenance
6. Maintenance Checking Calibration Calibration equipment required DMM with accuracy of 0.02% or better. Examples of suitable instruments are Time Electronics’ 5075, or HP 34401A. Calibration should be done at 20C 10 deg C. Checking Calibration (RxTest - Current source) ... - Page 16 Checking Calibration (Voltage) Connect the DMM to the output terminals of the Loop-Mate1. Set the function switch to 0-10v dc. Select the most suitable range on the DMM to measure 10v dc. Turn on the Loop-Mate1. ...
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Page 17: Adjustment Of Calibration
Adjustment of Calibration When Loop-mate1 is found to be out of specification the procedures described in the following sections must be followed. 6.21 Disassembling Loop-Mate1 First remove the battery compartment cover and disconnect the battery, as shown in section 5.11 of this manual. ... -
Page 18: Trimmer Locations
Set the function switch to Rx Test. Select the most suitable range on the DMM to measure 20mA dc. Turn on the Loop-Mate 1. Press the UP arrow until 20mA output is selected. Adjust P2 until the DMM display reads exactly 20.000mA (if the full scale of the DMM being used is 19.999mA, then use set-point 18.4mA and adjust P2... -
Page 19: Re-Assembly
6.25 Re-assembly Disconnect the battery after re-calibration. Refit the lid. Care must be taken to ensure that the ribbon cable linking the two PCB’s is folded in such a way it won’t get trapped when the lid is screwed into place. -
Page 20: Guarantee & Servicing
7. Guarantee & Servicing Guarantee Period The Loop-Mate1 is guaranteed against defects in materials and workmanship for a period of one year from its delivery to the customer. During this period we will, subject to the instrument not being damaged due to maltreatment or overload, repair or replace it free of charge apart from shipping costs.
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