# AC AMPS TRUE RMS 1 OR 5 AMP MODULE

Fits Lynx Leopard & Tiger 320 Series

Input

Connected to Isolated

Current Transformer.

High Precision 1 or 5 Amp Shunt Resistor.

Improved linearity.

Span Potentiometer.

Provides precise full scale adjustment.

Span Adjust Header.

Provides fine full scale range adjustment.

Span Range Header.

Provides Coarse

range adjustment.

State-of-the-Art

Electromagnetic Noise Suppression.

Circuitry ensures signal integrity even in harsh EMC environments.

Active Bandpass Filter.

0.2 Hz to 10 kHz bandwidth.

Texmate Patented

RMS-to-DC Converter.

High accuracy, extremely linear.

Interface to

Lynx, Leopard and Tiger Families

At last, the answer to precise and repeatable RMS current measurements for the AC power industry.

This revolutionary module utilizes the Texmate designed RMS-to-DC convertor circuit block. This circuit block provides true RMS measurements over a wide range of isolated input currents while maintaining excellent linearity up to a 10 kHz waveform frequency.

Input Module

Order Code Suffix

IA09 (1 Amp)

IA11 (5 Amp)

Current Range (Isolated)

Frequency Range

Resolution

Accuracy

Lynx

Leopard

Tiger

Output Signal

Forced Zero

Meter Interface

Span Drift

Hardware Module Specifications

IA09: 0-1 A AC, IA11: 0-5 A AC. 0.02 % linearity on both.

0.2 Hz to 10 KHz (3 dB).

1 mA over full scale input.

0.03 % of full scale input 2 digit.

0.05 % of full scale input 2 digit.

0.02 % of full scale input 1 digit.

Adjustable to 2 V full scale using on-board trimmer and header selections.

Forces output to 0000 if below 1 % of full scale.

Can be utilized in the Lynx, Leopard, and Tiger range of indicators, meter relays, and controllers. 500 ppm /C of full scale maximum.

Some Relevant Operating System Features

Direct display of true RMS current.

Setpoint control (Tiger & Leopard).

Full scale calibration accurate for any sized signal.

IA09-11 Data Sheet (NZ339)

Texmate, Inc. Tel. (760) 598-9899 www.texmate.com

Page 1

### Connector Pinouts

### Introduction

Note:

The IA09 and IA11 input module has been designed for use with an isolating current transformer (CT).

IA11 wired to monitor RMS amps usage on a resistive load connected to a single phase mains supply

Figure 1 IA09/IA11 Input Module Component La yout

The AC amps true RMS input module is a universal module designed to function with the Lynx, Leopard, and Tiger r ange of indicators, meter rela ys, and prog rammable meter controllers (PMCs).

IA09 has a 1 amp high-precision shunt resistor installed f or an isolated current r ange of 0 to 1 amp, while IA11 has a 5 amp high-precision shunt resistor installed for an isolated current range of 0 to 5 amps. A span potentiometer, span adjust header, and a span r ange header are used to adjust the input signal full scale. A zero input current produces a 0 V output signal, meaning no zero adjustment is necessar y.

Tiger Controllers and Leopard Meter Relays The Tiger and Leopard range use internal software functions to calibrate the span. However, it may be necessar y to adjust the span potentiometer to br ing the maxim um input signal within the full scale range of the instrument.

When the input signal is be yond the full scale range of a Tiger controller, the display flashes [OVER].

When the input signal is be yond the full scale r ange of a Leopard meter, the top segment of each digit of the display flashes.

Figure 2 Span Potentiometer Adjustment

With the span range header set to HI and the span adjust header set to 100%, turn the 15 turn span potentiometer counter-clockwise to decrease the signal until a reading appears on the display (See Figure 2). Now calibrate the instrument using the software calibration method for your instrument.

Lynx Indicators

Calibration settings on all L ynx indicators are carr ied out using the b uilt-in headers and span potentiometer. The 15 turn span potentiometer has an approximate span adjustment of 20% of the full scale signal. Together, the span range header and the span adjust header e xpand the range of the span potentiometer into 10 equal adjustab le portions, each por tion being 10% of the full scale range.

When the input signal is be yond the full scale r ange of a Lynx indicator, a 1 is displayed in the most significant digit with all other digits b lank.

Page 2

Texmate, Inc. Tel. (760) 598-9899 www.texmate.com

IA09-11 Data Sheet (NZ339)

### Header Descriptions

Span Potentiometer (Pot)

The 15 tur n span potentiometer is located on the r side of the input module (when vie wed from the rear of the meter). Typical adjustment is 20% of the input signal r (See Figure 3).

ight-hand

ange

Figure 3 Span Pot

Span Adjust Header

This unique fiv e-position header e xpands the adjustment r ange of the span potentiometer into fiv e equal 20% sectors, across 100% of the input signal span. Any input signal span can then be precisely scaled do wn to provide any required display span from full scale to the smallest viewable unit (See Figures 4 and 5).

Figure 4 Span Adjust Header

Figure 5 Span Adjust Header Operation

Span Range Header

The span r ange header w orks together with the span adjust header b y splitting its adjustment r ange into a high and a low range. This has the eff ect of dividing the adjustment r ange of the span potentiometer into ten equal 10% sectors across 100% of the input signal span (See Figures 6 and 7).

Figure 6 Span Rang e Header

Figure 7 Span Rang e Header Operation

IA09-11 Data Sheet (NZ339)

Texmate, Inc. Tel. (760) 598-9899 www.texmate.com

Page 3

Lynx Indicator Calibration Setup To successfully calibrate a Lynx indicator over the input signal span with an IA09 or IA11 input module installed, the headers must be correctly set and the span pot adjusted to the final displa y setting.

Example

With an IA11 input module installed in a DX-35 L ynx indicator, we want to show a digital representation of a 5 A input signal o n the display. As the DX-35 has a maximum of 1999 counts, 5 A could easily be shown to two decimal places by setting the span setting to

500 counts.

To configure the input module to sho w 500 counts for an isolated input signal of 5 A, proceed as f ollows:

1) The first adjustment to mak e is the coarse r ange setting. Set the span range header to the LO W position (See Figure 8).

This effectively halves the maximum counts of the DX-35 from 1999 to

1000 (+ or 20% of 1999.This could be as much as 400 counts).

2) The next adjustment is the fine r ange setting. Set the span adjust header to the 40% position (See Figure 9).

This position should lea ve you with a display setting lower than 500 counts.

By how much, depends on the position of the span pot.

3) The final adjustment can no w be made

using the span pot (See Figure 10).

As the display reading is below the required setting of 500 counts, tur n the span pot clockwise to increase the counts until the display shows a reading of 500 counts.

Figure 8 Span Rang e Header

Adjustment

Figure 9 Span Adjust Header

Figure 10 Span Pot Adjustment

Adjustment

Tel: 1-760-598-9899 USA 1-800-839-6283 Thats 1-800-TEXMATE

Page 4

Texmate, Inc. Tel. (760) 598-9899 www.texmate.com

IA09-11 Data Sheet (NZ339)

### About TexMate

Texmate is an American manufacturer of high durability industrial grade panel meters, bar graphs, and transducers. Texmate's meters are frequently equipped with relays and various signal outputs for industrial automation applications and are known for their extremely long service life.