Elitech RCW-400A USER GUIDE
Chapter I Product Introduction
1.1 Overview
Coldwatch RCW-400A is a four-way temperature/humidity data logger with a wide temperature range and high precision. The segment LCD screen can display the system clock, current running status, record capacity, and recorded data. It features buzzer and relay alarms. It can transmit data wirelessly via 3G to the Elitech cold chain cloud platform, allowing users to check real-time temperature/humidity data through internet terminals and receive SMS (short message service) alarms via GSM. Users can view, manage, and monitor data online remotely via a browser or smart phone APP.
The standard accessories include one temperature sensor and one humidity sensor, which can be expanded to two temperature sensors and two humidity sensors. Coldwatch has a built-in rechargeable lithium battery, enabling continuous real-time data uploading and SMS alarms even during power outages.
The product is widely used in foodstuff, medicine, restaurant, transportation, and other industries, in accordance with HACCP system certification.
1.2 Features and functions
- Monitor running status of cold storage
- Over temperature/humidity SMS alarm function
- Keep working for at least 6 hours after power off
- Two alarm outputs: buzzer alarm and relay alarm
- Monitor and record temperature and humidity data
- Record cycle can be flexibly adjusted
- The device record capacity is 20,000 points, with no data storage restriction on the server
- The device can communicate with the cloud platform, allowing real-time remote monitoring, uploading, printing, and managing of record data
Chapter II Instructions for Use
2.1 Product Display
2.1.1 Interface
Image shows the Elitech RCW-400A device. Labels point to: GSM antenna, Power indicator, and GSM network indicator.
2.1.2 LCD display
Image shows the LCD display with numbered indicators:
| Indicator | Description |
| (1) | Battery display |
| (2) | Power on/off indicator |
| (3) | Over limit alarm indication: MAX—Over upper limit alarm, MIN—Over lower limit alarm |
| (4) | Sensor channel display |
| (5) | Date and time display |
| (6) | Recording status indicator: Wait—Wait to record, Act—Recording |
| (7) | Record number |
| (8) | GSM network signal strength |
| (9) | 3G network platform indicator |
| (10) | Humidity unit |
| (11) | Temperature unit |
2.1.3 Alarm display
2.1.3.1 Sensor alarm
Image shows the device displaying an upper limit alarm for temperature (27.5°C) and a 'short circuit or disconnected alarm' indicator.
2.2 Installation
2.2.1 Accessories installation
The symbols shown in the wiring label have the following meanings:
Diagram shows the wiring label with ports labeled USB, RS485, P4, P3, P2, RH2, P1, RH1, 12V-24VDC/AC, and 10A/250VAC. It also labels connections for Temperature sensor 4, Temperature sensor 3, Temperature/Humidity sensor 2, Humidity sensor 1, and AC power adapter.
- (1) Wiring label
- (2) AC power adapter
- (3) Humidity sensor 1: humidity sensor inserts to 6 7 8 9;
- (4) Temperature and humidity sensor multiplexing 2; temperature sensor inserts to 12 13; humidity sensor inserts to 10 11 12 13;
- (5) Temperature sensor 3 (optional);
- (6) Temperature sensor 4 (optional);
- (7) USB and RS485 interface is reserved for future extension.
2.2.2 SIM card installation
Please use a cellphone SIM card and ensure it has sufficient credit. If you do not know the correct type of SIM card, please contact the supplier. Please disconnect the external power supply before changing the SIM card. (Only supports microSIM of WCDMA system).
2.2.3 SIM card replacement
- Switch off the monitor and change the SIM card. Then switch it on again.
- After replacement, the previous bound cellphone number still exists; please do not repeat binding.
2.2.4 Product installation diagram
Diagram shows the rear panel of the device with connections for Power adapter, ON/OFF button, Humidity sensor socket, and Temperature sensor socket.
2.3 Use Instruction
2.3.1 User guide
- Insert a SIM card that is in normal use with 3G data rate available into the monitor.
- Connect the required temperature or humidity sensor.
- Connect the external power, then press the On/Off button to switch on the monitor.
- Wait for the display to show GSM network signal, send SMS settings and APN according to the SIM operator (if APN is set, there is no need to repeat setting), and receive an SMS receipt indicating successful setup.
- Wait until the 3G network platform indicator icon shows, indicating that the monitor has started successfully.
2.3.2 Platform registration
Visit website: http://www.i-elitech.com
Step 1: Register account
Image shows the login screen with fields for Username, Password, and Checkcode, and buttons for Login and Register [Step 1].
Step 2: Submit information
Image shows a form for submitting company details: Company Name, Company address, Company type, Username, Password, Confirm Password, and Telephone. It includes dropdowns for location and company type. The company name is 'Jing chuang Electric Co., Ltd', address is 'Xuzhou, Chinese mainland, No. 1 Mount Huangshan Road', company type is 'Cold Storage', username is 'adnin', and telephone is '18151301827'. Buttons for Return and Register [Step 2] are visible.
Step 3: Log in the platform
Image shows the login screen again, with fields for Username, Password, and Checkcode, and buttons for Login and Register [Step 3].
Step 4: Add devices in the platform
Image shows a screen with tabs for 'Device', 'Project', 'User', 'About'. The 'Device' tab is active, showing 'Device GUID', 'Name', 'Type', 'Device Timezone', and 'Maintaince'. A button 'Save' is present. Below this, there's a section to 'Add Device' with fields for 'Device GUID', 'Name', 'Type', 'Device Timezone', and 'Maintaince'. A button 'Save' is present. The text indicates to send the command '[id]' via cellphone message to the device cellphone to acquire the ID number [Step 4].
Step 5: After adding devices is finished, in the status column, it displays the status of "online activated", then click "Edit" to set the device parameters [Step 5].
Step 6: Set the time of the device
Image shows the device parameter setting interface. Fields for 'Device GUID', 'Name', 'Type', 'Device Timezone', and 'Maintaince' are visible. Buttons for 'Set time', 'Set record interval for offline', 'Set phone', 'Set SMS', 'Set probe name', 'Set probe parameter' are available. The 'Set time' section is expanded, showing fields for Hours, Minutes, Seconds, and a 'Set' button [Step 6].
Step 7: Set offline record interval—If the device keeps offline for a long time (for example, no credit in the SIM card), it is suggested setting a long record interval in order to record data in a long term.
Step 8: Synchronize cellphone number
Step 9: Set the bound cellphone number
Image shows the interface for setting phone numbers. Fields for 'Administrator Phone', 'User Phone 1', 'User Phone 2', 'User Phone 3', 'User Phone 4' are present, each with a dropdown for region and a 'Set' button. A note states: "1. You can set blank phone to remove it." Text indicates: "Click 'Set' to bind cellphone number. This can be achieved by sending a cellphone short message." Another note says: "The bound cellphone number can be displayed in current interface." [Step 8, Step 9].
Step 10: Set short message
Image shows settings for short messages, including 'Enable', 'Start time', 'End time', 'Interval time', 'Digital Password', and 'Call telephone', with a 'Set' button [Step 10].
Step 11: Set probe name
Image shows fields for 'Probe1', 'Probe2', 'Probe3', 'Probe4', each with a 'Set' button. A note states: "1. Maybe some probes are integrated with temperature-humidity sensor in one." [Step 11].
Step 12: Set probe parameters
- Set upper/lower limit of probes.
- Modify the deviation of temperature and humidity. This function is only available for administrator. For common users, it is invisible.
- Alarm delay time; unit: minute.
- After finishing setting, check “Enable” and then click “SET” to finish probe setting.
Image shows the probe parameter settings for Probe1, Probe2, Probe3, Probe4, with fields for Type, Caps, Limit, Correct, Delay, and Enable, and a 'Set' button for each [Step 12].
Step 13: Create project
Image shows the 'Project' tab with a '+' icon. Text indicates: "Click '+' to create new project." [Step 13].
Step 14: Edit project information
- Edit the name of the project, the type of project, and storage volume (cold storage volume).
- It displays all added devices in the column of "Select devices". Select a certain device (such as medicine storage shown in the following diagram), and click "Add" button, then it will appear in the column of "selected devices". Click "Save" button to finish project creating.
Image shows the 'Add Project' interface with fields for Name, Type, Address, Remark, and Capability. It also shows 'Select device' and 'Selected device' columns, with options to add/remove devices. The example shows 'Cold Storage' as the project type and 'RCW-400A' as the selected device [Step 14].
Step 15: Device overview—display device list in the format of squares
Image shows a device list with GUID, Name, Type, Creator, Status, and Probes (P1, P2, P3, P4) with their readings or status [Step 15].
Step 16: Project information—display the basic project information and alarm list information
Image shows project details: Name, Type, Creator, Address, Capability, Create time. It also shows an Alarm List with Date, Content, When, Query, Solution, and Status [Step 16].
Step 17: Data record—display the recorded data and diagram of the device
Image shows a device list with options to click 'Data' to display the recorded data list or 'Diagram' to display data in terms of diagrams [Step 17].
Cellphone Operation Guide
SMS setting command list
| Aim | Message user sent | Message device received | Operating instruction |
| Get the device GUID | 「id」 | 12345678912345678912 | Get the device GUID |
| APN settings | 「#apn#username#password#」 | APN Set successfully | Set APN. |
SMS query command
| Aim | Message user sent | Message device received | Operating instruction |
| Query cold storage status | 「qs」 | (Reply) P1: temperature 12.1°C, normal; P2: humidity 40%RH, normal; power supply normal. | Query current temperature and power supply status of cold storage. |
| (Reply) P1: temperature 12.1°C, over upper limit; P2: humidity 40%RH, below lower limit; power supply normal. | |||
| Wrong command | Wrong command, send 「code」 to query device code. | Only bound cellphone users receive this message when sending wrong command. |
Push message cellphone received
| Aim | Message device received | Operating instruction |
| Over limit alarm | (alarm) P1: temperature 30.4°C, over upper limit; the device is alarming now! To cancel alarm, please dial the phone of the device. | To cancel alarm, please dial the phone of the device. |
| (alarm) P2: humidity 40%RH over upper limit; the device is alarming now! To cancel alarm, please dial the phone of the device. | ||
| (alarm) P1: temperature 30.4°C, over lower limit; the device is alarming now! To cancel alarm, please dial the phone of the device. | ||
| (alarm) P2: humidity 50%RH over lower limit; the device is alarming now! To cancel alarm, please dial the phone of the device. | ||
| Relieve alarm | P1 temperature 10.4°C, and alarm is relieved! | |
| Sensor abnormity | (Alarm) Probe is not connected. | |
| Cold storage power outage | (Alarm) Power supply abnormal. Please check it soon. | |
| Cold storage power connection | (Abnormity recovered) Power is connected. | |
| Low battery warning | (Alarm) Power outage and device will be power off soon. Please check it asap. |
Chapter III Technical Parameters
- Power supply: 12V/2.5A(DC);
- Temperature measuring range: -40°C ~ 70°C;
- Temperature accuracy: ± 1°C (-25°C ~ 0°C); ± 0.5°C (0°C ~ 40°C); ± 2°C (others); (If sensor wire is longer than 50m, accuracy deviates 1%.)
- Temperature resolution: 0.1;
- Humidity measuring range: 10~90%RH;
- Humidity accuracy: ±5%RH (typical) (25°C, 30-80%); ±5%RH (10°C, 30-80%); ±5%RH (40°C, 30-80%);
- Temperature sensor type: NTC;
- Humidity sensor type: SHT21;
- Record cycle: 1 min to 24 hours continuously set;
- Record capacity: each channel 20,000 points (Max);
- Applicable environment: temperature -10°C ~ 45°C; relative humidity 30% ~ 70%; Indoor use only, prohibited from exposure to rain and sun.
- Alarm output: buzzer and relay;
- Communication interface: 3G, SMS;
- Sensor input interface: RH1 and RH2 input temperature or humidity;
- Standby battery: 3.7V 2200mAH lithium battery.
Chapter IV Accessory
4.1 Standard Accessories
- One Coldwatch RCW-400A device
- One temperature sensor (with 5m wire)
- One humidity sensor (with 5m wire)
- One user manual
- One power adapter
4.2 Device Optional Accessories
- Temperature sensor
- Humidity sensor
- Temperature and humidity combined sensor
4.3 User guide of Elitech cold chain network platform
Download address: http://www.i-elitech.com
Chapter V Troubleshooting
- 1. Data display shows "--.--" or "--.-- %".
Sensors are not connected or poorly connected! Please check whether connection wire color is consistent with the instruction of wiring label. - 2. Cellphone could not be bound.
Check if there is signal in LCD display.
Check if there is enough credit in the device's SIM card. Remove SIM card from the device and insert into a cellphone to check.
Check if there has a reliable signal around the device. - 3. Cancel phone call alert
After receiving an alarm message or alarm call, dial the device's phone; alert could be canceled when you hear the hanging up of the device. - 4. Big temperature and humidity data error
Do not put probe lines and high-voltage power lines together.
If extending probe line, please solder the connection points by tin solder to ensure a good connection.
Open humidity probe housing to see if the white seal is removed. If not, please remove it.
