DAIICHI QT2-500 - User Manual

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QT-216-057

INSTRUCTION MANUAL

(DETAILED VERSION)

MULTI-TRANSDUCER

QT2-500

Table of Contents

Questions and Answers

D
Derrick LucasAug 3, 2025
What to do if there is an error in the analog output of DAIICHI QT2-500?
- A
  Ashley EvansAug 3, 2025
  If you're getting an error in the analog output of your DAIICHI Transducer, several settings could be the cause. First, verify that the VT and CT ratings are correctly configured. Next, ensure the output element setting for each output channel is accurate. Also, confirm that the range settings for each measurement item are correct. Check the analog output settings (0...5V, 1...5V, 0...10V, 2...10V). Finally, use the test mode wiring check function to ensure the wiring is correct.
T
Tracy RiveraAug 8, 2025
Why am I getting an error in active and reactive energy in DAIICHI QT2-500 Transducer?
- L
  Larry GarrettAug 8, 2025
  To resolve errors in active and reactive energy readings (display, communication, pulse output) of your DAIICHI Transducer, start by verifying the VT and CT settings. Next, ensure that the output pulse rate is correctly configured. Lastly, use the test mode wiring check function to confirm the wiring is accurate.
K
karenbrownAug 12, 2025
What to do if I see an error in communication output on my DAIICHI Transducer?
- A
  alyssa74Aug 12, 2025
  If you're experiencing communication output errors with your DAIICHI Transducer, begin by checking the VT and CT settings to ensure they are correct. Also, use the test mode wiring check function to verify the wiring is accurate.
M
Mrs. Stephanie GarciaAug 17, 2025
How to unlock setting mode on DAIICHI QT2-500?
- C
  Charles ScottAug 17, 2025
  If your DAIICHI Transducer is locked and doesn't switch to the setting mode or test mode, unlock it by pressing the MODE and SET buttons simultaneously for three seconds.
R
Rebekah TownsendAug 23, 2025
Why does the display disappear on my DAIICHI QT2-500 Transducer and how to fix it?
- J
  John BowenAug 23, 2025
  If the display disappears on your DAIICHI Transducer, it may be due to the auto-off function. Press the switch to turn the display back on.
S
stephen77Aug 28, 2025
Why is the power LED not lit on my DAIICHI QT2-500?
- M
  Michael BennettAug 28, 2025
  If the power LED on your DAIICHI Transducer is not lighting up, it may be because auxiliary power is not being supplied to terminals 13 and 14. Apply auxiliary power to resolve this.

Summary

Features of Product

Connection

Operation and Screen

6.1 Basic Operation

Step-by-step guide to powering on, navigating menus, and basic control operations.

6.2 Screen Structure

Display Modes

7.1 Measurement Display

Details on how to view measured values, including units and conversion.

7.2 Setting Value Display

Information on how to view configured settings for various output types.

Setting Modes

8.1 Setting Flow

Overview of the process for navigating and changing product settings.

8.2 Setting Method

Detailed steps on how to select and change individual setting parameters.

8.3 Setting Menu

Detailed configuration options for input, output, and measurement settings.

Wiring Type

Configures the input circuit wiring type (3P3W, 3P4W, 1P2W, 1P3W).

VT Select

CT

Current Range [I RANGE]

Sets the current measurement range for analog output.

Voltage Range [U RANGE]

Active Power Range [P RANGE]

Reactive Power [Q]

Reactive Power (Power Flow) [Qpf]

Output Limiter [LIMIT]

Sets ON/OFF of output limiter for each channel.

Output Adjustment [ADJUST]

Pulse Output Setting PO

Output Element [ELEMENT]

Sets the measurement element for pulse output to CH12.

Output Pulse Rate [RATE]

Sets the output pulse rate for CH12.

Communication Output Setting COMM

Protocol [PROTOCOL]

Sets the communication protocol (MODBUS RTU or PROTOCOL A).

Address [ADDRESS]

Sets the communication address for the device.

Bit Rate [BIT RATE]

Sets the communication bit rate.

Data Bits [DATA BITS]

Parity [PARITY]

Stop Bits [STOP BIT]

Configuration CFG

Display [DISPLAY]

Sets auto-off time and brightness for the display.

Reset [RESET]

Test Modes

9.1 Test Flow

Flowchart for entering and selecting test modes on the device.

9.2 Test Menu

Options for testing different output and input functionalities.

Analog Output [AO]

Tests analog output channels by selecting output values.

Pulse Output [PO]

Tests pulse output channels by activating pulse output.

Communication Output [COMM]

Tests communication output values for various parameters.

Wiring Check [WIRING CK]

Specifications

10.1 Rating

Details the electrical ratings for input circuit, voltage, current, and auxiliary supply.

10.2 Measurement Item, Class

Lists measurement elements and their corresponding class indices for different wiring types.

10.3 Detailed Specification

Provides comprehensive technical specifications, standards, and safety information.

Test Function

Details on testing analog output, communication, pulse output, input wiring, and display.

Measuring Range

Frequency

Fundamental-Wave RMS Value

Distortion Factor

Multi-Transducer Setting Software (QT2-CS-01)

11.1 Outline

Overview of the QT2-CS-01 software for setting up the QT2-500.

11.2 Hardware Requirements

11.3 System Configuration

Troubleshooting

Power LED is not lights

Display disappears

Does not switch to the setting mode or test mode

Solutions for inability to switch between modes due to lock functions.

Error in Analog Output

Troubleshooting steps for errors related to analog output.

Error in Communication Output

Troubleshooting steps for errors in communication output.

Error in Active Energy and Reactive Energy

Troubleshooting for errors in active/reactive energy, display, communication, and pulse output.

DAIICHI QT2-500 Specifications

General

Brand	DAIICHI
Model	QT2-500
Category	Transducer
Language	English

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